Add the shardvtab virtual table that uses the new cost estimation functions.

FossilOrigin-Name: 9404300ac1dd0ef4e4b42f618901c6120b15a158c230f76e47c4c6346f6f4f58
An experimental interface for retrieving the estimated cost and estimated
2019-04-27 20:39:38 +00:00 · 2019-04-26 17:20:33 +00:00
510 changed files with 14044 additions and 45719 deletions
@@ -190,8 +190,7 @@ LIBOBJS0 = alter.lo analyze.lo attach.lo auth.lo \
         table.lo threads.lo tokenize.lo treeview.lo trigger.lo \
         update.lo userauth.lo upsert.lo util.lo vacuum.lo \
         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
-         vdbetrace.lo vdbevtab.lo \
-         wal.lo walker.lo where.lo wherecode.lo whereexpr.lo \
+         vdbetrace.lo wal.lo walker.lo where.lo wherecode.lo whereexpr.lo \
         window.lo utf.lo vtab.lo

 # Object files for the amalgamation.
@@ -297,7 +296,6 @@ SRC = \
  $(TOP)/src/vdbemem.c \
  $(TOP)/src/vdbesort.c \
  $(TOP)/src/vdbetrace.c \
-  $(TOP)/src/vdbevtab.c \
  $(TOP)/src/vdbeInt.h \
  $(TOP)/src/vtab.c \
  $(TOP)/src/vxworks.h \
@@ -443,7 +441,6 @@ TESTSRC += \
  $(TOP)/ext/misc/carray.c \
  $(TOP)/ext/misc/closure.c \
  $(TOP)/ext/misc/csv.c \
-  $(TOP)/ext/misc/decimal.c \
  $(TOP)/ext/misc/eval.c \
  $(TOP)/ext/misc/explain.c \
  $(TOP)/ext/misc/fileio.c \
@@ -505,7 +502,6 @@ TESTSRC2 = \
  $(TOP)/src/vdbe.c \
  $(TOP)/src/vdbemem.c \
  $(TOP)/src/vdbetrace.c \
-  $(TOP)/src/vdbevtab.c \
  $(TOP)/src/where.c \
  $(TOP)/src/wherecode.c \
  $(TOP)/src/whereexpr.c \
@@ -611,21 +607,19 @@ SHELL_OPT += -DSQLITE_ENABLE_UNKNOWN_SQL_FUNCTION
 SHELL_OPT += -DSQLITE_ENABLE_STMTVTAB
 SHELL_OPT += -DSQLITE_ENABLE_DBPAGE_VTAB
 SHELL_OPT += -DSQLITE_ENABLE_DBSTAT_VTAB
-SHELL_OPT += -DSQLITE_ENABLE_BYTECODE_VTAB
 SHELL_OPT += -DSQLITE_ENABLE_OFFSET_SQL_FUNC
 SHELL_OPT += -DSQLITE_ENABLE_DESERIALIZE
+SHELL_OPT += -DSQLITE_INTROSPECTION_PRAGMAS
 FUZZERSHELL_OPT = -DSQLITE_ENABLE_JSON1
 FUZZCHECK_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_OSS_FUZZ
 FUZZCHECK_OPT += -DSQLITE_MAX_MEMORY=50000000
 FUZZCHECK_OPT += -DSQLITE_PRINTF_PRECISION_LIMIT=1000
 FUZZCHECK_OPT += -DSQLITE_ENABLE_DESERIALIZE
 FUZZCHECK_OPT += -DSQLITE_ENABLE_FTS4
-FUZZCHECK_OPT += -DSQLITE_ENABLE_FTS3_PARENTHESIS
 #FUZZCHECK_OPT += -DSQLITE_ENABLE_FTS5
 FUZZCHECK_OPT += -DSQLITE_ENABLE_RTREE
 FUZZCHECK_OPT += -DSQLITE_ENABLE_GEOPOLY
 FUZZCHECK_OPT += -DSQLITE_ENABLE_DBSTAT_VTAB
-FUZZCHECK_OPT += -DSQLITE_ENABLE_BYTECODE_VTAB
 FUZZCHECK_SRC = $(TOP)/test/fuzzcheck.c $(TOP)/test/ossfuzz.c
 DBFUZZ_OPT =

@@ -695,7 +689,6 @@ DBFUZZ2_OPTS = \
  -DSQLITE_ENABLE_DESERIALIZE \
  -DSQLITE_DEBUG \
  -DSQLITE_ENABLE_DBSTAT_VTAB \
-  -DSQLITE_ENABLE_BYTECODE_VTAB \
  -DSQLITE_ENABLE_RTREE \
  -DSQLITE_ENABLE_FTS4 \
  -DSQLITE_ENABLE_FTS5
@@ -1012,9 +1005,6 @@ vdbesort.lo:	$(TOP)/src/vdbesort.c $(HDR)
 vdbetrace.lo:	$(TOP)/src/vdbetrace.c $(HDR)
 	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/vdbetrace.c

-vdbevtab.lo:	$(TOP)/src/vdbevtab.c $(HDR)
-	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/vdbevtab.c
-
 vtab.lo:	$(TOP)/src/vtab.c $(HDR)
 	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/vtab.c

@@ -1063,17 +1053,11 @@ parse.h:	parse.c

 parse.c:	$(TOP)/src/parse.y lemon$(BEXE)
 	cp $(TOP)/src/parse.y .
-	./lemon$(BEXE) $(OPT_FEATURE_FLAGS) $(OPTS) -S parse.y
+	./lemon$(BEXE) $(OPT_FEATURE_FLAGS) $(OPTS) parse.y

 sqlite3.h:	$(TOP)/src/sqlite.h.in $(TOP)/manifest mksourceid$(BEXE) $(TOP)/VERSION
 	$(TCLSH_CMD) $(TOP)/tool/mksqlite3h.tcl $(TOP) >sqlite3.h

-sqlite3rc.h:	$(TOP)/src/sqlite3.rc $(TOP)/VERSION
-	echo '#ifndef SQLITE_RESOURCE_VERSION' >$@
-	echo -n '#define SQLITE_RESOURCE_VERSION ' >>$@
-	cat $(TOP)/VERSION | $(TCLSH_CMD) $(TOP)/tool/replace.tcl exact . , >>$@
-	echo '#endif' >>sqlite3rc.h
-
 keywordhash.h:	$(TOP)/tool/mkkeywordhash.c
 	$(BCC) -o mkkeywordhash$(BEXE) $(OPT_FEATURE_FLAGS) $(OPTS) $(TOP)/tool/mkkeywordhash.c
 	./mkkeywordhash$(BEXE) >keywordhash.h
@@ -1082,13 +1066,10 @@ keywordhash.h:	$(TOP)/tool/mkkeywordhash.c
 SHELL_SRC = \
 	$(TOP)/src/shell.c.in \
        $(TOP)/ext/misc/appendvfs.c \
-	$(TOP)/ext/misc/completion.c \
-        $(TOP)/ext/misc/decimal.c \
-	$(TOP)/ext/misc/fileio.c \
-        $(TOP)/ext/misc/ieee754.c \
 	$(TOP)/ext/misc/shathree.c \
+	$(TOP)/ext/misc/fileio.c \
+	$(TOP)/ext/misc/completion.c \
 	$(TOP)/ext/misc/sqlar.c \
-        $(TOP)/ext/misc/uint.c \
 	$(TOP)/ext/expert/sqlite3expert.c \
 	$(TOP)/ext/expert/sqlite3expert.h \
 	$(TOP)/ext/misc/zipfile.c \
@@ -1197,10 +1178,10 @@ FTS5_SRC = \
   $(TOP)/ext/fts5/fts5_varint.c \
   $(TOP)/ext/fts5/fts5_vocab.c  \

-fts5parse.c:	$(TOP)/ext/fts5/fts5parse.y lemon$(BEXE)
+fts5parse.c:	$(TOP)/ext/fts5/fts5parse.y lemon
 	cp $(TOP)/ext/fts5/fts5parse.y .
 	rm -f fts5parse.h
-	./lemon$(BEXE) $(OPTS) -S fts5parse.y
+	./lemon$(BEXE) $(OPTS) fts5parse.y

 fts5parse.h: fts5parse.c

@@ -1230,7 +1211,6 @@ TESTFIXTURE_FLAGS += -DSQLITE_SERIES_CONSTRAINT_VERIFY=1
 TESTFIXTURE_FLAGS += -DSQLITE_DEFAULT_PAGE_SIZE=1024
 TESTFIXTURE_FLAGS += -DSQLITE_ENABLE_STMTVTAB
 TESTFIXTURE_FLAGS += -DSQLITE_ENABLE_DBPAGE_VTAB
-TESTFIXTURE_FLAGS += -DSQLITE_ENABLE_BYTECODE_VTAB
 TESTFIXTURE_FLAGS += -DSQLITE_ENABLE_DESERIALIZE

 TESTFIXTURE_SRC0 = $(TESTSRC2) libsqlite3.la
@@ -1263,6 +1243,10 @@ fuzztest:	fuzzcheck$(TEXE) $(FUZZDATA) sessionfuzz$(TEXE) $(TOP)/test/sessionfuz
 	./fuzzcheck$(TEXE) $(FUZZDATA)
 	./sessionfuzz$(TEXE) run $(TOP)/test/sessionfuzz-data1.db

+fastfuzztest:	fuzzcheck$(TEXE) $(FUZZDATA) sessionfuzz$(TEXE) $(TOP)/test/sessionfuzz-data1.db
+	./fuzzcheck$(TEXE) --limit-mem 100M $(FUZZDATA)
+	./sessionfuzz$(TEXE) run $(TOP)/test/sessionfuzz-data1.db
+
 valgrindfuzz:	fuzzcheck$(TEXT) $(FUZZDATA) sessionfuzz$(TEXE) $(TOP)/test/sessionfuzz-data1.db
 	valgrind ./fuzzcheck$(TEXE) --cell-size-check --limit-mem 10M --timeout 600 $(FUZZDATA)
 	valgrind ./sessionfuzz$(TEXE) run $(TOP)/test/sessionfuzz-data1.db
@@ -1280,7 +1264,7 @@ quicktest:	./testfixture$(TEXE)
 # This is the common case.  Run many tests that do not take too long,
 # including fuzzcheck, sqlite3_analyzer, and sqldiff tests.
 #
-test:	fuzztest sourcetest $(TESTPROGS) tcltest
+test:	fastfuzztest sourcetest $(TESTPROGS) tcltest

 # Run a test using valgrind.  This can take a really long time
 # because valgrind is so much slower than a native machine.
@@ -1295,9 +1279,6 @@ valgrindtest:	$(TESTPROGS) valgrindfuzz
 smoketest:	$(TESTPROGS) fuzzcheck$(TEXE)
 	./testfixture$(TEXE) $(TOP)/test/main.test $(TESTOPTS)

-shelltest: $(TESTPROGS)
-	./testfixture$(TEXT) $(TOP)/test/permutations.test shell
-
 sqlite3_analyzer.c: sqlite3.c $(TOP)/src/tclsqlite.c $(TOP)/tool/spaceanal.tcl $(TOP)/tool/mkccode.tcl $(TOP)/tool/sqlite3_analyzer.c.in
 	$(TCLSH_CMD) $(TOP)/tool/mkccode.tcl $(TOP)/tool/sqlite3_analyzer.c.in >sqlite3_analyzer.c

@@ -1400,10 +1381,10 @@ checksymbols: sqlite3.o
 # a tarball named for the version number.  Ex:  sqlite-autoconf-3110000.tar.gz.
 # The snapshot-tarball target builds a tarball named by the SHA1 hash
 #
-amalgamation-tarball: sqlite3.c sqlite3rc.h
+amalgamation-tarball: sqlite3.c
 	TOP=$(TOP) sh $(TOP)/tool/mkautoconfamal.sh --normal

-snapshot-tarball: sqlite3.c sqlite3rc.h
+snapshot-tarball: sqlite3.c
 	TOP=$(TOP) sh $(TOP)/tool/mkautoconfamal.sh --snapshot

 # The next two rules are used to support the "threadtest" target. Building
@@ -19,7 +19,7 @@ TOP = ../sqlite
 #### C Compiler and options for use in building executables that
 #    will run on the platform that is doing the build.
 #
-BCC = gcc -g -O0
+BCC = gcc -g -O2
 #BCC = /opt/ancic/bin/c89 -0

 #### If the target operating system supports the "usleep()" system
@@ -38,8 +38,8 @@ THREADSAFE = -DTHREADSAFE=0
 #### Specify any extra linker options needed to make the library
 #    thread safe
 #
-THREADLIB = -lpthread -lm -ldl
-#THREADLIB = 
+#THREADLIB = -lpthread
+THREADLIB = 

 #### Specify any extra libraries needed to access required functions.
 #
@@ -54,9 +54,11 @@ TLIBS =
 #    You can make the library go almost twice as fast if you compile
 #    with -DNDEBUG=1
 #
-OPTS += -DSQLITE_DEBUG=1
-OPTS += -DSQLITE_ENABLE_WHERETRACE
-OPTS += -DSQLITE_ENABLE_SELECTTRACE
+#OPTS = -DSQLITE_DEBUG=2
+#OPTS = -DSQLITE_DEBUG=1
+#OPTS = 
+OPTS = -DNDEBUG=1
+OPTS += -DHAVE_FDATASYNC=1

 #### The suffix to add to executable files.  ".exe" for windows.
 #    Nothing for unix.
@@ -68,7 +70,7 @@ EXE =
 #    will run on the target platform.  This is usually the same
 #    as BCC, unless you are cross-compiling.
 #
-TCC = gcc -O0
+TCC = gcc -O6
 #TCC = gcc -g -O0 -Wall
 #TCC = gcc -g -O0 -Wall -fprofile-arcs -ftest-coverage
 #TCC = /opt/mingw/bin/i386-mingw32-gcc -O6
@@ -89,12 +91,18 @@ SHPREFIX = lib

 #### Extra compiler options needed for programs that use the TCL library.
 #
-TCL_FLAGS = -I/home/drh/tcl/include/tcl8.6
+#TCL_FLAGS =
+#TCL_FLAGS = -DSTATIC_BUILD=1
+TCL_FLAGS = -I/home/drh/tcltk/8.5linux
+#TCL_FLAGS = -I/home/drh/tcltk/8.5win -DSTATIC_BUILD=1
+#TCL_FLAGS = -I/home/drh/tcltk/8.3hpux

 #### Linker options needed to link against the TCL library.
 #
 #LIBTCL = -ltcl -lm -ldl
-LIBTCL = /home/drh/tcl/lib/libtcl8.6.a -lm -lpthread -ldl -lz
+LIBTCL = /home/drh/tcltk/8.5linux/libtcl8.5g.a -lm -ldl
+#LIBTCL = /home/drh/tcltk/8.5win/libtcl85s.a -lmsvcrt
+#LIBTCL = /home/drh/tcltk/8.3hpux/libtcl8.3.a -ldld -lm -lc

 #### Additional objects for SQLite library when TCL support is enabled.
 #TCLOBJ =
@@ -73,7 +73,7 @@ API_ARMOR = 0
 !IFNDEF NO_WARN
 !IF $(USE_FULLWARN)!=0
 NO_WARN = -wd4054 -wd4055 -wd4100 -wd4127 -wd4130 -wd4152 -wd4189 -wd4206
-NO_WARN = $(NO_WARN) -wd4210 -wd4232 -wd4244 -wd4305 -wd4306 -wd4702 -wd4706
+NO_WARN = $(NO_WARN) -wd4210 -wd4232 -wd4305 -wd4306 -wd4702 -wd4706
 !ENDIF
 !ENDIF

@@ -234,15 +234,6 @@ OSTRACE = 0
 DEBUG = 0
 !ENDIF

-# <<mark>>
-# Disable use of the --linemacros argument to the mksqlite3c.tcl tool, which
-# is used to build the amalgamation.
-#
-!IFNDEF NO_LINEMACROS
-NO_LINEMACROS = 0
-!ENDIF
-# <</mark>>
-
 # Enable use of available compiler optimizations?  Normally, this should be
 # non-zero.  Setting this to zero, thus disabling all compiler optimizations,
 # can be useful for testing.
@@ -257,12 +248,6 @@ OPTIMIZATIONS = 2
 SESSION = 0
 !ENDIF

-# Set this to non-0 to enable support for the rbu extension.
-#
-!IFNDEF RBU
-RBU = 0
-!ENDIF
-
 # Set the source code file to be used by executables and libraries when
 # they need the amalgamation.
 #
@@ -366,7 +351,7 @@ OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_JSON1=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_STMTVTAB=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_DBPAGE_VTAB=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_DBSTAT_VTAB=1
-OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_BYTECODE_VTAB=1
+OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_INTROSPECTION_PRAGMAS=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_DESERIALIZE=1
 !ENDIF
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_COLUMN_METADATA=1
@@ -380,13 +365,6 @@ OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_SESSION=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_PREUPDATE_HOOK=1
 !ENDIF

-# Should the rbu extension be enabled?  If so, add compilation options
-# to enable it.
-#
-!IF $(RBU)!=0
-OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_RBU=1
-!ENDIF
-
 # These are the "extended" SQLite compilation options used when compiling for
 # the Windows 10 platform.
 #
@@ -785,7 +763,7 @@ MKSQLITE3C_TOOL = $(TOP)\tool\mksqlite3c.tcl
 !ENDIF

 !IFNDEF MKSQLITE3C_ARGS
-!IF $(DEBUG)>1 && $(NO_LINEMACROS)==0
+!IF $(DEBUG)>1
 MKSQLITE3C_ARGS = --linemacros
 !ELSE
 MKSQLITE3C_ARGS =
@@ -1256,8 +1234,7 @@ LIBOBJS0 = vdbe.lo parse.lo alter.lo analyze.lo attach.lo auth.lo \
         table.lo threads.lo tokenize.lo treeview.lo trigger.lo \
         update.lo upsert.lo util.lo vacuum.lo \
         vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
-         vdbetrace.lo vdbevtab.lo wal.lo walker.lo where.lo wherecode.lo \
-         whereexpr.lo \
+         vdbetrace.lo wal.lo walker.lo where.lo wherecode.lo whereexpr.lo \
         window.lo utf.lo vtab.lo
 # <</mark>>

@@ -1364,7 +1341,6 @@ SRC01 = \
  $(TOP)\src\vdbemem.c \
  $(TOP)\src\vdbesort.c \
  $(TOP)\src\vdbetrace.c \
-  $(TOP)\src\vdbevtab.c \
  $(TOP)\src\vtab.c \
  $(TOP)\src\wal.c \
  $(TOP)\src\walker.c \
@@ -1495,7 +1471,7 @@ SRC12 =

 # All source code files.
 #
-SRC = $(SRC00) $(SRC01) $(SRC03) $(SRC04) $(SRC05) $(SRC06) $(SRC07) $(SRC08) $(SRC09) $(SRC10) $(SRC11) $(SRC12)
+SRC = $(SRC00) $(SRC01) $(SRC03) $(SRC04) $(SRC05) $(SRC06) $(SRC07) $(SRC08) $(SRC09) $(SRC10) $(SRC11)

 # Source code to the test files.
 #
@@ -1560,7 +1536,6 @@ TESTEXT = \
  $(TOP)\ext\misc\carray.c \
  $(TOP)\ext\misc\closure.c \
  $(TOP)\ext\misc\csv.c \
-  $(TOP)\ext\misc\decimal.c \
  $(TOP)\ext\misc\eval.c \
  $(TOP)\ext\misc\explain.c \
  $(TOP)\ext\misc\fileio.c \
@@ -1697,7 +1672,6 @@ FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_FTS4
 FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_RTREE
 FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_GEOPOLY
 FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_DBSTAT_VTAB
-FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_BYTECODE_VTAB

 FUZZCHECK_SRC = $(TOP)\test\fuzzcheck.c $(TOP)\test\ossfuzz.c
 OSSSHELL_SRC = $(TOP)\test\ossshell.c $(TOP)\test\ossfuzz.c
@@ -1769,7 +1743,7 @@ $(SQLITE3DLL):	$(LIBOBJ) $(LIBRESOBJS) $(CORE_LINK_DEP)
 sqlite3.def:	libsqlite3.lib
 	echo EXPORTS > sqlite3.def
 	dumpbin /all libsqlite3.lib \
-		| $(TCLSH_CMD) $(TOP)\tool\replace.tcl include "^\s+1 _?(sqlite3(?:session|changeset|changegroup|rebaser|rbu)?_[^@]*)(?:@\d+)?$$" \1 \
+		| $(TCLSH_CMD) $(TOP)\tool\replace.tcl include "^\s+1 _?(sqlite3(?:session|changeset|changegroup|rebaser)?_[^@]*)(?:@\d+)?$$" \1 \
 		| sort >> sqlite3.def
 # <</block2>>

@@ -1847,16 +1821,15 @@ mptest:	mptester.exe
 	for %i in ($(SRC11)) do copy /Y %i tsrc
 	for %i in ($(SRC12)) do copy /Y %i tsrc
 	copy /Y fts5.c tsrc
-	copy /B tsrc\fts5.c +,,
 	copy /Y fts5.h tsrc
-	copy /B tsrc\fts5.h +,,
 	del /Q tsrc\sqlite.h.in tsrc\parse.y 2>NUL
 	$(TCLSH_CMD) $(TOP)\tool\vdbe-compress.tcl $(OPTS) < tsrc\vdbe.c > vdbe.new
 	move vdbe.new tsrc\vdbe.c
 	echo > .target_source

-sqlite3.c:	.target_source sqlite3ext.h sqlite3session.h $(MKSQLITE3C_TOOL)
+sqlite3.c:	.target_source sqlite3ext.h $(MKSQLITE3C_TOOL)
 	$(TCLSH_CMD) $(MKSQLITE3C_TOOL) $(MKSQLITE3C_ARGS)
+	copy $(TOP)\ext\session\sqlite3session.h .

 sqlite3-all.c:	sqlite3.c $(TOP)\tool\split-sqlite3c.tcl
 	$(TCLSH_CMD) $(TOP)\tool\split-sqlite3c.tcl
@@ -1871,8 +1844,7 @@ sqlite3.lo:	$(SQLITE3C)
 # Rules to build the LEMON compiler generator
 #
 lempar.c:	$(TOP)\tool\lempar.c
-	copy /Y $(TOP)\tool\lempar.c .
-	copy /B lempar.c +,,
+	copy $(TOP)\tool\lempar.c .

 lemon.exe:	$(TOP)\tool\lemon.c lempar.c
 	$(BCC) $(NO_WARN) -Daccess=_access \
@@ -2125,9 +2097,6 @@ vdbesort.lo:	$(TOP)\src\vdbesort.c $(HDR)
 vdbetrace.lo:	$(TOP)\src\vdbetrace.c $(HDR)
 	$(LTCOMPILE) $(CORE_COMPILE_OPTS) -c $(TOP)\src\vdbetrace.c

-vdbevtab.lo:	$(TOP)\src\vdbevtab.c $(HDR)
-	$(LTCOMPILE) $(CORE_COMPILE_OPTS) -c $(TOP)\src\vdbevtab.c
-
 vtab.lo:	$(TOP)\src\vtab.c $(HDR)
 	$(LTCOMPILE) $(CORE_COMPILE_OPTS) -c $(TOP)\src\vtab.c

@@ -2172,9 +2141,8 @@ parse.h:	parse.c

 parse.c:	$(TOP)\src\parse.y lemon.exe
 	del /Q parse.y parse.h parse.h.temp 2>NUL
-	copy /Y $(TOP)\src\parse.y .
-	copy /B parse.y +,,
-	.\lemon.exe $(REQ_FEATURE_FLAGS) $(OPT_FEATURE_FLAGS) $(EXT_FEATURE_FLAGS) $(OPTS) -S parse.y
+	copy $(TOP)\src\parse.y .
+	.\lemon.exe $(REQ_FEATURE_FLAGS) $(OPT_FEATURE_FLAGS) $(EXT_FEATURE_FLAGS) $(OPTS) parse.y

 $(SQLITE3H):	$(TOP)\src\sqlite.h.in $(TOP)\manifest mksourceid.exe $(TOP)\VERSION
 	$(TCLSH_CMD) $(TOP)\tool\mksqlite3h.tcl $(TOP:\=/) > $(SQLITE3H) $(MKSQLITE3H_ARGS)
@@ -2186,13 +2154,8 @@ sqlite3ext.h:	.target_source
 	copy /Y sqlite3ext.h tsrc\sqlite3ext.h
 !ELSE
 	copy /Y tsrc\sqlite3ext.h sqlite3ext.h
-	copy /B sqlite3ext.h +,,
 !ENDIF

-sqlite3session.h:	$(TOP)\ext\session\sqlite3session.h
-	copy /Y $(TOP)\ext\session\sqlite3session.h .
-	copy /B sqlite3session.h +,,
-
 mkkeywordhash.exe:	$(TOP)\tool\mkkeywordhash.c
 	$(BCC) $(NO_WARN) -Fe$@ $(REQ_FEATURE_FLAGS) $(OPT_FEATURE_FLAGS) $(EXT_FEATURE_FLAGS) $(OPTS) \
 		$(TOP)\tool\mkkeywordhash.c /link $(LDFLAGS) $(NLTLINKOPTS) $(NLTLIBPATHS)
@@ -2204,12 +2167,9 @@ keywordhash.h:	$(TOP)\tool\mkkeywordhash.c mkkeywordhash.exe
 SHELL_SRC = \
 	$(TOP)\src\shell.c.in \
 	$(TOP)\ext\misc\appendvfs.c \
-	$(TOP)\ext\misc\completion.c \
-        $(TOP)\ext\misc\decimal.c \
-	$(TOP)\ext\misc\fileio.c \
-        $(TOP)\ext\misc\ieee754.c \
 	$(TOP)\ext\misc\shathree.c \
-	$(TOP)\ext\misc\uint.c \
+	$(TOP)\ext\misc\fileio.c \
+	$(TOP)\ext\misc\completion.c \
 	$(TOP)\ext\expert\sqlite3expert.c \
 	$(TOP)\ext\expert\sqlite3expert.h \
 	$(TOP)\ext\misc\memtrace.c \
@@ -2340,22 +2300,19 @@ LSM1_SRC = \
   $(TOP)\ext\lsm1\lsm_win32.c

 fts5parse.c:	$(TOP)\ext\fts5\fts5parse.y lemon.exe
-	copy /Y $(TOP)\ext\fts5\fts5parse.y .
-	copy /B fts5parse.y +,,
+	copy $(TOP)\ext\fts5\fts5parse.y .
 	del /Q fts5parse.h 2>NUL
-	.\lemon.exe $(REQ_FEATURE_FLAGS) $(OPT_FEATURE_FLAGS) $(EXT_FEATURE_FLAGS) $(OPTS) -S fts5parse.y
+	.\lemon.exe $(REQ_FEATURE_FLAGS) $(OPT_FEATURE_FLAGS) $(EXT_FEATURE_FLAGS) $(OPTS) fts5parse.y

 fts5parse.h:	fts5parse.c

 fts5.c:	$(FTS5_SRC)
 	$(TCLSH_CMD) $(TOP)\ext\fts5\tool\mkfts5c.tcl
-	copy /Y $(TOP)\ext\fts5\fts5.h .
-	copy /B fts5.h +,,
+	copy $(TOP)\ext\fts5\fts5.h .

 lsm1.c:	$(LSM1_SRC)
 	$(TCLSH_CMD) $(TOP)\ext\lsm1\tool\mklsm1c.tcl
-	copy /Y $(TOP)\ext\lsm1\lsm.h .
-	copy /B lsm.h +,,
+	copy $(TOP)\ext\lsm1\lsm.h .

 fts5.lo:	fts5.c $(HDR) $(EXTHDR)
 	$(LTCOMPILE) $(CORE_COMPILE_OPTS) $(NO_WARN) -DSQLITE_CORE -c fts5.c
@@ -2383,7 +2340,6 @@ TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_SERIES_CONSTRAINT_VERIFY=1
 TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_DEFAULT_PAGE_SIZE=1024
 TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_ENABLE_STMTVTAB=1
 TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_ENABLE_DBPAGE_VTAB=1
-TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_ENABLE_BYTECODE_VTAB=1
 TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_ENABLE_JSON1=1
 TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_ENABLE_DESERIALIZE=1
 TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) $(TEST_CCONV_OPTS)
@@ -2449,6 +2405,9 @@ queryplantest:	testfixture.exe shell
 fuzztest:	fuzzcheck.exe
 	.\fuzzcheck.exe $(FUZZDATA)

+fastfuzztest:	fuzzcheck.exe
+	.\fuzzcheck.exe --limit-mem 100M $(FUZZDATA)
+
 # Minimal testing that runs in less than 3 minutes (on a fast machine)
 #
 quicktest:	testfixture.exe sourcetest
@@ -2458,7 +2417,7 @@ quicktest:	testfixture.exe sourcetest
 # This is the common case.  Run many tests that do not take too long,
 # including fuzzcheck, sqlite3_analyzer, and sqldiff tests.
 #
-test:	$(TESTPROGS) sourcetest fuzztest
+test:	$(TESTPROGS) sourcetest fastfuzztest
 	@set PATH=$(LIBTCLPATH);$(PATH)
 	.\testfixture.exe $(TOP)\test\veryquick.test $(TESTOPTS)

@@ -2466,9 +2425,6 @@ smoketest:	$(TESTPROGS)
 	@set PATH=$(LIBTCLPATH);$(PATH)
 	.\testfixture.exe $(TOP)\test\main.test $(TESTOPTS)

-shelltest: $(TESTPROGS)
-	.\testfixture.exe $(TOP)\test\permutations.test shell
-
 sqlite3_analyzer.c:	$(SQLITE3C) $(SQLITE3H) $(TOP)\src\tclsqlite.c $(TOP)\tool\spaceanal.tcl $(TOP)\tool\mkccode.tcl $(TOP)\tool\sqlite3_analyzer.c.in $(SQLITE_TCL_DEP)
 	$(TCLSH_CMD) $(TOP)\tool\mkccode.tcl $(TOP)\tool\sqlite3_analyzer.c.in > $@

@@ -306,13 +306,30 @@ describes its purpose and role within the larger system.
 <a name="vauth"></a>
 ## Verifying Code Authenticity

-The `manifest` file at the root directory of the source tree
+If you obtained an SQLite source tree from a secondary source, such as a
+GitHub mirror, and you want to verify that it has not been altered, there
+are a couple of ways to do that.
+
+If you have a release version of SQLite, and you are using the
+`sqlite3.c` amalgamation, then SHA3-256 hashes for the amalgamation are
+available in the [change log](https://www.sqlite.org/changes.html) on
+the official website.  After building the `sqlite3.c` file, you can check
+that it is authentic by comparing the hash.  This does not ensure that the
+test scripts are unaltered, but it does validate the deliverable part of
+the code and the verification process only involves computing and
+comparing a single hash.
+
+For versions other than an official release, or if you are building the
+`sqlite3.c` amalgamation using non-standard build options, the verification
+process is a little more involved.  The `manifest` file at the root directory
+of the source tree
 contains either a SHA3-256 hash (for newer files) or a SHA1 hash (for 
-older files) for every source file in the repository.
-The SHA3-256 hash of the `manifest`
+older files) for every source file in the repository.  You can write a script
+to extracts hashes from `manifest` and verifies the hashes against the 
+corresponding files in the source tree.  The SHA3-256 hash of the `manifest`
 file itself is the official name of the version of the source tree that you
-have. The `manifest.uuid` file should contain the SHA3-256 hash of the
-`manifest` file. If all of the above hash comparisons are correct, then
+have.  The `manifest.uuid` file should contain the SHA3-256 hash of the
+`manifest` file.  If all of the above hash comparisons are correct, then
 you can be confident that your source tree is authentic and unadulterated.

 The format of the `manifest` file should be mostly self-explanatory, but
@@ -1 +1 @@
-3.33.0
+3.29.0
@@ -13,7 +13,7 @@ sqlite3_CFLAGS = $(AM_CFLAGS) -DSQLITE_ENABLE_EXPLAIN_COMMENTS -DSQLITE_ENABLE_D

 include_HEADERS = sqlite3.h sqlite3ext.h

-EXTRA_DIST = sqlite3.1 tea Makefile.msc sqlite3.rc sqlite3rc.h README.txt Replace.cs Makefile.fallback
+EXTRA_DIST = sqlite3.1 tea Makefile.msc sqlite3.rc README.txt Replace.cs Makefile.fallback
 pkgconfigdir = ${libdir}/pkgconfig
 pkgconfig_DATA = sqlite3.pc

@@ -73,7 +73,7 @@ API_ARMOR = 0
 !IFNDEF NO_WARN
 !IF $(USE_FULLWARN)!=0
 NO_WARN = -wd4054 -wd4055 -wd4100 -wd4127 -wd4130 -wd4152 -wd4189 -wd4206
-NO_WARN = $(NO_WARN) -wd4210 -wd4232 -wd4244 -wd4305 -wd4306 -wd4702 -wd4706
+NO_WARN = $(NO_WARN) -wd4210 -wd4232 -wd4305 -wd4306 -wd4702 -wd4706
 !ENDIF
 !ENDIF

@@ -196,7 +196,6 @@ OSTRACE = 0
 DEBUG = 0
 !ENDIF

-
 # Enable use of available compiler optimizations?  Normally, this should be
 # non-zero.  Setting this to zero, thus disabling all compiler optimizations,
 # can be useful for testing.
@@ -211,12 +210,6 @@ OPTIMIZATIONS = 2
 SESSION = 0
 !ENDIF

-# Set this to non-0 to enable support for the rbu extension.
-#
-!IFNDEF RBU
-RBU = 0
-!ENDIF
-
 # Set the source code file to be used by executables and libraries when
 # they need the amalgamation.
 #
@@ -289,7 +282,7 @@ OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_JSON1=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_STMTVTAB=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_DBPAGE_VTAB=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_DBSTAT_VTAB=1
-OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_BYTECODE_VTAB=1
+OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_INTROSPECTION_PRAGMAS=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_DESERIALIZE=1
 !ENDIF
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_COLUMN_METADATA=1
@@ -303,13 +296,6 @@ OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_SESSION=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_PREUPDATE_HOOK=1
 !ENDIF

-# Should the rbu extension be enabled?  If so, add compilation options
-# to enable it.
-#
-!IF $(RBU)!=0
-OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_RBU=1
-!ENDIF
-
 # These are the "extended" SQLite compilation options used when compiling for
 # the Windows 10 platform.
 #
@@ -992,7 +978,7 @@ Replace.exe:
 sqlite3.def:	Replace.exe $(LIBOBJ)
 	echo EXPORTS > sqlite3.def
 	dumpbin /all $(LIBOBJ) \
-		| .\Replace.exe "^\s+/EXPORT:_?(sqlite3(?:session|changeset|changegroup|rebaser|rbu)?_[^@,]*)(?:@\d+|,DATA)?$$" $$1 true \
+		| .\Replace.exe "^\s+/EXPORT:_?(sqlite3(?:session|changeset|changegroup|rebaser)?_[^@,]*)(?:@\d+|,DATA)?$$" $$1 true \
 		| sort >> sqlite3.def

 $(SQLITE3EXE):	shell.c $(SHELL_CORE_DEP) $(LIBRESOBJS) $(SHELL_CORE_SRC) $(SQLITE3H)
@@ -161,7 +161,7 @@ AC_ARG_ENABLE(rtree, [AS_HELP_STRING(
  [--enable-rtree], [include rtree support [default=yes]])], 
  [], [enable_rtree=yes])
 if test x"$enable_rtree" = "xyes"; then
-  BUILD_CFLAGS="$BUILD_CFLAGS -DSQLITE_ENABLE_RTREE -DSQLITE_ENABLE_GEOPOLY"
+  BUILD_CFLAGS="$BUILD_CFLAGS -DSQLITE_ENABLE_RTREE"
 fi
 #-----------------------------------------------------------------------

@@ -19,7 +19,7 @@ dnl	to configure the system for the local environment.
 # so you can encode the package version directly into the source files.
 #-----------------------------------------------------------------------

-AC_INIT([sqlite], [3.32.0])
+AC_INIT([sqlite], [3.7.4])

 #--------------------------------------------------------------------
 # Call TEA_INIT as the first TEA_ macro to set up initial vars.
@@ -153,7 +153,7 @@ Please `cd` to its location first.
 #
 #-------------------------------------------------------------------------

-PROJECT = tclsqlite3
+PROJECT = sqlite3
 !include "rules.vc"

 # nmakehelp -V <file> <tag> will search the file for tag, skips until a
@@ -162,15 +162,18 @@ PROJECT = tclsqlite3

 !if [echo REM = This file is generated from Makefile.vc > versions.vc]
 !endif
-# get project version from row "AC_INIT([sqlite], [3.x.y])"
+# get project version from row "AC_INIT([sqlite], [3.7.14])"
 !if [echo DOTVERSION = \>> versions.vc] \
-   && [nmakehlp -V ..\configure.ac AC_INIT >> versions.vc]
+   && [nmakehlp -V ..\configure.in AC_INIT >> versions.vc]
 !endif
 !include "versions.vc"

 VERSION         = $(DOTVERSION:.=)
 STUBPREFIX      = $(PROJECT)stub

+DLLOBJS = \
+	$(TMP_DIR)\tclsqlite3.obj
+
 #-------------------------------------------------------------------------
 # Target names and paths ( shouldn't need changing )
 #-------------------------------------------------------------------------
@@ -179,7 +182,7 @@ BINROOT		= .
 ROOT            = ..

 PRJIMPLIB	= $(OUT_DIR)\$(PROJECT)$(VERSION)$(SUFX).lib
-PRJLIBNAME	= $(PROJECT).$(EXT)
+PRJLIBNAME	= $(PROJECT)$(VERSION)$(SUFX).$(EXT)
 PRJLIB		= $(OUT_DIR)\$(PRJLIBNAME)

 PRJSTUBLIBNAME	= $(STUBPREFIX)$(VERSION).lib
@@ -201,17 +204,6 @@ DOCDIR		= $(ROOT)\doc
 TOOLSDIR	= $(ROOT)\tools
 COMPATDIR	= $(ROOT)\compat

-### Figure out where the primary source code file(s) is/are.
-!if exist("$(ROOT)\..\..\sqlite3.c") && exist("$(ROOT)\..\..\src\tclsqlite.c")
-SQL_INCLUDES = -I"$(ROOT)\..\.."
-SQLITE_SRCDIR = $(ROOT)\..\..
-TCLSQLITE_SRCDIR = $(ROOT)\..\..\src
-DLLOBJS = $(TMP_DIR)\sqlite3.obj $(TMP_DIR)\tclsqlite.obj
-!else
-TCLSQLITE_SRCDIR = $(ROOT)\generic
-DLLOBJS = $(TMP_DIR)\tclsqlite3.obj
-!endif
-
 #---------------------------------------------------------------------
 # Compile flags
 #---------------------------------------------------------------------
@@ -231,7 +223,7 @@ cdebug	= -Z7 -WX -Od -GZ
 !endif

 ### Declarations common to all compiler options
-cflags = -nologo -c -W3 -D_CRT_SECURE_NO_WARNINGS -YX -Fp$(TMP_DIR)^\
+cflags = -nologo -c -W3 -YX -Fp$(TMP_DIR)^\

 !if $(MSVCRT)
 !if $(DEBUG)
@@ -247,8 +239,8 @@ crt = -MT
 !endif
 !endif

-INCLUDES	= $(SQL_INCLUDES) $(TCL_INCLUDES) -I"$(WINDIR)" \
-                  -I"$(GENERICDIR)" -I"$(ROOT)\.."
+INCLUDES	= $(TCL_INCLUDES) -I"$(WINDIR)" -I"$(GENERICDIR)" \
+                  -I"$(ROOT)\.."
 BASE_CLFAGS	= $(cflags) $(cdebug) $(crt) $(INCLUDES) \
                  -DSQLITE_3_SUFFIX_ONLY=1 -DSQLITE_ENABLE_RTREE=1 \
                  -DSQLITE_ENABLE_FTS3=1 -DSQLITE_OMIT_DEPRECATED=1
@@ -349,17 +341,20 @@ $(PRJSTUBLIB): $(PRJSTUBOBJS)
 # Implicit rules
 #---------------------------------------------------------------------

-$(TMP_DIR)\sqlite3.obj:		$(SQLITE_SRCDIR)\sqlite3.c
-	$(cc32) $(TCL_CFLAGS) -DBUILD_$(PROJECT) -Fo$(TMP_DIR)\ \
-		-c $(SQLITE_SRCDIR)\sqlite3.c
+{$(WINDIR)}.c{$(TMP_DIR)}.obj::
+    $(cc32) $(TCL_CFLAGS) -DBUILD_$(PROJECT) -Fo$(TMP_DIR)\ @<<
+$<
+<<

-$(TMP_DIR)\tclsqlite.obj:	$(TCLSQLITE_SRCDIR)\tclsqlite.c
-	$(cc32) $(TCL_CFLAGS) -DBUILD_$(PROJECT) -Fo$(TMP_DIR)\ \
-		-c $(TCLSQLITE_SRCDIR)\tclsqlite.c
+{$(GENERICDIR)}.c{$(TMP_DIR)}.obj::
+    $(cc32) $(TCL_CFLAGS) -DBUILD_$(PROJECT) -Fo$(TMP_DIR)\ @<<
+$<
+<<

-$(TMP_DIR)\tclsqlite3.obj:	$(TCLSQLITE_SRCDIR)\tclsqlite3.c
-	$(cc32) $(TCL_CFLAGS) -DBUILD_$(PROJECT) -Fo$(TMP_DIR)\ \
-		-c $(TCLSQLITE_SRCDIR)\tclsqlite3.c
+{$(COMPATDIR)}.c{$(TMP_DIR)}.obj::
+    $(cc32) $(TCL_CFLAGS) -DBUILD_$(PROJECT) -Fo$(TMP_DIR)\ @<<
+$<
+<<

 {$(WINDIR)}.rc{$(TMP_DIR)}.res:
 	$(rc32) -fo $@ -r -i "$(GENERICDIR)" -D__WIN32__ \
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for sqlite 3.33.0.
+# Generated by GNU Autoconf 2.69 for sqlite 3.29.0.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
@@ -726,8 +726,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='sqlite'
 PACKAGE_TARNAME='sqlite'
-PACKAGE_VERSION='3.33.0'
-PACKAGE_STRING='sqlite 3.33.0'
+PACKAGE_VERSION='3.29.0'
+PACKAGE_STRING='sqlite 3.29.0'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL=''

@@ -906,7 +906,6 @@ enable_amalgamation
 enable_load_extension
 enable_memsys5
 enable_memsys3
-enable_all
 enable_fts3
 enable_fts4
 enable_fts5
@@ -1467,7 +1466,7 @@ if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
-\`configure' configures sqlite 3.33.0 to adapt to many kinds of systems.
+\`configure' configures sqlite 3.29.0 to adapt to many kinds of systems.

 Usage: $0 [OPTION]... [VAR=VALUE]...

@@ -1532,7 +1531,7 @@ fi

 if test -n "$ac_init_help"; then
  case $ac_init_help in
-     short | recursive ) echo "Configuration of sqlite 3.33.0:";;
+     short | recursive ) echo "Configuration of sqlite 3.29.0:";;
   esac
  cat <<\_ACEOF

@@ -1560,7 +1559,6 @@ Optional Features:
                          Disable loading of external extensions
  --enable-memsys5        Enable MEMSYS5
  --enable-memsys3        Enable MEMSYS3
-  --enable-all            Enable FTS4, FTS5, Geopoly, JSON, RTree, Sessions
  --enable-fts3           Enable the FTS3 extension
  --enable-fts4           Enable the FTS4 extension
  --enable-fts5           Enable the FTS5 extension
@@ -1659,7 +1657,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
  cat <<\_ACEOF
-sqlite configure 3.33.0
+sqlite configure 3.29.0
 generated by GNU Autoconf 2.69

 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2078,7 +2076,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.

-It was created by sqlite $as_me 3.33.0, which was
+It was created by sqlite $as_me 3.29.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@
@@ -3936,13 +3934,13 @@ if ${lt_cv_nm_interface+:} false; then :
 else
  lt_cv_nm_interface="BSD nm"
  echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:3939: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:3937: $ac_compile\"" >&5)
  (eval "$ac_compile" 2>conftest.err)
  cat conftest.err >&5
-  (eval echo "\"\$as_me:3942: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:3940: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
  (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
  cat conftest.err >&5
-  (eval echo "\"\$as_me:3945: output\"" >&5)
+  (eval echo "\"\$as_me:3943: output\"" >&5)
  cat conftest.out >&5
  if $GREP 'External.*some_variable' conftest.out > /dev/null; then
    lt_cv_nm_interface="MS dumpbin"
@@ -5148,7 +5146,7 @@ ia64-*-hpux*)
  ;;
 *-*-irix6*)
  # Find out which ABI we are using.
-  echo '#line 5151 "configure"' > conftest.$ac_ext
+  echo '#line 5149 "configure"' > conftest.$ac_ext
  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
  (eval $ac_compile) 2>&5
  ac_status=$?
@@ -6673,11 +6671,11 @@ else
   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
   -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:6676: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:6674: $lt_compile\"" >&5)
   (eval "$lt_compile" 2>conftest.err)
   ac_status=$?
   cat conftest.err >&5
-   echo "$as_me:6680: \$? = $ac_status" >&5
+   echo "$as_me:6678: \$? = $ac_status" >&5
   if (exit $ac_status) && test -s "$ac_outfile"; then
     # The compiler can only warn and ignore the option if not recognized
     # So say no if there are warnings other than the usual output.
@@ -7012,11 +7010,11 @@ else
   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
   -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7015: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7013: $lt_compile\"" >&5)
   (eval "$lt_compile" 2>conftest.err)
   ac_status=$?
   cat conftest.err >&5
-   echo "$as_me:7019: \$? = $ac_status" >&5
+   echo "$as_me:7017: \$? = $ac_status" >&5
   if (exit $ac_status) && test -s "$ac_outfile"; then
     # The compiler can only warn and ignore the option if not recognized
     # So say no if there are warnings other than the usual output.
@@ -7117,11 +7115,11 @@ else
   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
   -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7120: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7118: $lt_compile\"" >&5)
   (eval "$lt_compile" 2>out/conftest.err)
   ac_status=$?
   cat out/conftest.err >&5
-   echo "$as_me:7124: \$? = $ac_status" >&5
+   echo "$as_me:7122: \$? = $ac_status" >&5
   if (exit $ac_status) && test -s out/conftest2.$ac_objext
   then
     # The compiler can only warn and ignore the option if not recognized
@@ -7172,11 +7170,11 @@ else
   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
   -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7175: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7173: $lt_compile\"" >&5)
   (eval "$lt_compile" 2>out/conftest.err)
   ac_status=$?
   cat out/conftest.err >&5
-   echo "$as_me:7179: \$? = $ac_status" >&5
+   echo "$as_me:7177: \$? = $ac_status" >&5
   if (exit $ac_status) && test -s out/conftest2.$ac_objext
   then
     # The compiler can only warn and ignore the option if not recognized
@@ -9552,7 +9550,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 9555 "configure"
+#line 9553 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@@ -9648,7 +9646,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 9651 "configure"
+#line 9649 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@@ -11268,7 +11266,7 @@ if test "${enable_amalgamation+set}" = set; then :
  enableval=$enable_amalgamation;
 fi

-if test "${enable_amalgamation}" = "no" ; then
+if test "${enable_amalgamation}" == "no" ; then
  USE_AMALGAMATION=0
 fi

@@ -11452,15 +11450,6 @@ else
 $as_echo "no" >&6; }
 fi

-########
-# The --enable-extensions argument is short-hand to enable
-# multiple extensions.
-# Check whether --enable-all was given.
-if test "${enable_all+set}" = set; then :
-  enableval=$enable_all;
-fi
-
-
 #########
 # See whether we should enable Full Text Search extensions
 # Check whether --enable-fts3 was given.
@@ -11476,7 +11465,7 @@ if test "${enable_fts4+set}" = set; then :
  enableval=$enable_fts4;
 fi

-if test "${enable_fts4}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_fts4}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS4"
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing log" >&5
 $as_echo_n "checking for library containing log... " >&6; }
@@ -11540,7 +11529,7 @@ if test "${enable_fts5+set}" = set; then :
  enableval=$enable_fts5;
 fi

-if test "${enable_fts5}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_fts5}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS5"
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing log" >&5
 $as_echo_n "checking for library containing log... " >&6; }
@@ -11607,7 +11596,7 @@ if test "${enable_json1+set}" = set; then :
  enableval=$enable_json1;
 fi

-if test "${enable_json1}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_json1}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_JSON1"
 fi

@@ -11619,7 +11608,7 @@ if test "${enable_update_limit+set}" = set; then :
  enableval=$enable_update_limit;
 fi

-if test "${enable_update_limit}" = "yes" ; then
+if test "${enable_udlimit}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_UPDATE_DELETE_LIMIT"
 fi

@@ -11632,7 +11621,7 @@ else
  enable_geopoly=no
 fi

-if test "${enable_geopoly}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_geopoly}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_GEOPOLY"
  enable_rtree=yes
 fi
@@ -11655,7 +11644,7 @@ if test "${enable_session+set}" = set; then :
  enableval=$enable_session;
 fi

-if test "${enable_session}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_session}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_SESSION"
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_PREUPDATE_HOOK"
 fi
@@ -12243,7 +12232,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by sqlite $as_me 3.33.0, which was
+This file was extended by sqlite $as_me 3.29.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
@@ -12309,7 +12298,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-sqlite config.status 3.33.0
+sqlite config.status 3.29.0
 configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

@@ -569,7 +569,7 @@ AC_SUBST(TARGET_DEBUG)
 # See whether we should use the amalgamation to build
 AC_ARG_ENABLE(amalgamation, AC_HELP_STRING([--disable-amalgamation],
      [Disable the amalgamation and instead build all files separately]))
-if test "${enable_amalgamation}" = "no" ; then
+if test "${enable_amalgamation}" == "no" ; then
  USE_AMALGAMATION=0
 fi
 AC_SUBST(USE_AMALGAMATION)
@@ -613,12 +613,6 @@ else
  AC_MSG_RESULT([no])
 fi

-########
-# The --enable-extensions argument is short-hand to enable
-# multiple extensions.
-AC_ARG_ENABLE(all, AC_HELP_STRING([--enable-all],
-      [Enable FTS4, FTS5, Geopoly, JSON, RTree, Sessions]))
-
 #########
 # See whether we should enable Full Text Search extensions
 AC_ARG_ENABLE(fts3, AC_HELP_STRING([--enable-fts3],
@@ -628,13 +622,13 @@ if test "${enable_fts3}" = "yes" ; then
 fi
 AC_ARG_ENABLE(fts4, AC_HELP_STRING([--enable-fts4],
      [Enable the FTS4 extension]))
-if test "${enable_fts4}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_fts4}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS4"
  AC_SEARCH_LIBS([log],[m])
 fi
 AC_ARG_ENABLE(fts5, AC_HELP_STRING([--enable-fts5],
      [Enable the FTS5 extension]))
-if test "${enable_fts5}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_fts5}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS5"
  AC_SEARCH_LIBS([log],[m])
 fi
@@ -642,7 +636,7 @@ fi
 #########
 # See whether we should enable JSON1
 AC_ARG_ENABLE(json1, AC_HELP_STRING([--enable-json1],[Enable the JSON1 extension]))
-if test "${enable_json1}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_json1}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_JSON1"
 fi

@@ -651,7 +645,7 @@ fi
 # statements.
 AC_ARG_ENABLE(update-limit, AC_HELP_STRING([--enable-update-limit],
      [Enable the UPDATE/DELETE LIMIT clause]))
-if test "${enable_update_limit}" = "yes" ; then
+if test "${enable_udlimit}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_UPDATE_DELETE_LIMIT"
 fi

@@ -660,7 +654,7 @@ fi
 AC_ARG_ENABLE(geopoly, AC_HELP_STRING([--enable-geopoly],
      [Enable the GEOPOLY extension]),
      [enable_geopoly=yes],[enable_geopoly=no])
-if test "${enable_geopoly}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_geopoly}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_GEOPOLY"
  enable_rtree=yes
 fi
@@ -677,7 +671,7 @@ fi
 # See whether we should enable the SESSION extension
 AC_ARG_ENABLE(session, AC_HELP_STRING([--enable-session],
      [Enable the SESSION extension]))
-if test "${enable_session}" = "yes" -o "${enable_all}" = "yes" ; then
+if test "${enable_session}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_SESSION"
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_PREUPDATE_HOOK"
 fi
@@ -104,13 +104,9 @@ Write all output files into <i>directory</i>.  Normally, output files
 are written into the directory that contains the input grammar file.
 <li><b>-D<i>name</i></b>
 Define C preprocessor macro <i>name</i>.  This macro is usable by
-"<tt><a href='#pifdef'>%ifdef</a></tt>",
-"<tt><a href='#pifdef'>%ifndef</a></tt>", and
-"<tt><a href="#pifdef">%if</a></tt> lines
+"<tt><a href='#pifdef'>%ifdef</a></tt>" and
+"<tt><a href='#pifdef'>%ifndef</a></tt>" lines
 in the grammar file.
-<li><b>-E</b>
-Run the "%if" preprocessor step only and print the revised grammar
-file.
 <li><b>-g</b>
 Do not generate a parser.  Instead write the input grammar to standard
 output with all comments, actions, and other extraneous text removed.
@@ -127,7 +123,7 @@ Suppress generation of the report file.
 <li><b>-r</b>
 Do not sort or renumber the parser states as part of optimization.
 <li><b>-s</b>
-Show parser statistics before exiting.
+Show parser statistics before existing.
 <li><b>-T<i>file</i></b>
 Use <i>file</i> as the template for the generated C-code parser implementation.
 <li><b>-x</b>
@@ -492,7 +488,7 @@ is an error.</p>
 The precedence of a grammar rule is equal to the precedence of the
 left-most terminal symbol in the rule for which a precedence is
 defined.  This is normally what you want, but in those cases where
-you want the precedence of a grammar rule to be something different,
+you want to precedence of a grammar rule to be something different,
 you can specify an alternative precedence symbol by putting the
 symbol in square braces after the period at the end of the rule and
 before any C-code.  For example:</p>
@@ -559,11 +555,9 @@ other than that, the order of directives in Lemon is arbitrary.</p>
 <li><tt><a href='#default_destructor'>%default_destructor</a></tt>
 <li><tt><a href='#default_type'>%default_type</a></tt>
 <li><tt><a href='#destructor'>%destructor</a></tt>
-<li><tt><a href='#pifdef'>%else</a></tt>
 <li><tt><a href='#pifdef'>%endif</a></tt>
 <li><tt><a href='#extraarg'>%extra_argument</a></tt>
 <li><tt><a href='#pfallback'>%fallback</a></tt>
-<li><tt><a href='#pifdef'>%if</a></tt>
 <li><tt><a href='#pifdef'>%ifdef</a></tt>
 <li><tt><a href='#pifdef'>%ifndef</a></tt>
 <li><tt><a href='#pinclude'>%include</a></tt>
@@ -695,7 +689,7 @@ on Parse().
 <a name='extractx'></a>
 <h4>The <tt>%extra_context</tt> directive</h4>

-The <tt>%extra_context</tt> directive instructs Lemon to add a 2nd parameter
+The <tt>%extra_context</tt> directive instructs Lemon to add a 2th parameter
 to the parameter list of the ParseAlloc() and ParseInif() functions.  Lemon
 doesn't do anything itself with these extra argument, but it does
 store the value make it available to C-code action routines, destructors,
@@ -705,9 +699,9 @@ and so forth.  For example, if the grammar file contains:</p>
    %extra_context { MyStruct *pAbc }
 </pre></p>

-<p>Then the ParseAlloc() and ParseInit() functions will have an 2nd parameter
+<p>Then the ParseAlloc() and ParseInit() functions will have an 2th parameter
 of type "MyStruct*" and all action routines will have access to
-a variable named "pAbc" that is the value of that 2nd parameter.</p>
+a variable named "pAbc" that is the value of that 2th parameter.</p>

 <p>The <tt>%extra_argument</tt> directive works the same except that it
 is passed in on the Parse() routine instead of on ParseAlloc()/ParseInit().
@@ -743,11 +737,10 @@ arguments are tokens which fall back to the token identified by the first
 argument.</p>

 <a name='pifdef'></a>
-<h4>The <tt>%if</tt> directive and its friends</h4>
+<h4>The <tt>%ifdef</tt>, <tt>%ifndef</tt>, and <tt>%endif</tt> directives</h4>

-<p>The <tt>%if</tt>, <tt>%ifdef</tt>, <tt>%ifndef</tt>, <tt>%else</tt>,
-and <tt>%endif</tt> directives
-are similar to #if, #ifdef, #ifndef, #else, and #endif in the C-preprocessor,
+<p>The <tt>%ifdef</tt>, <tt>%ifndef</tt>, and <tt>%endif</tt> directives
+are similar to #ifdef, #ifndef, and #endif in the C-preprocessor,
 just not as general.
 Each of these directives must begin at the left margin.  No whitespace
 is allowed between the "%" and the directive name.</p>
@@ -756,22 +749,12 @@ is allowed between the "%" and the directive name.</p>
 "<tt>%endif</tt>" is
 ignored unless the "-DMACRO" command-line option is used.  Grammar text
 betwen "<tt>%ifndef MACRO</tt>" and the next nested "<tt>%endif</tt>" is
-included except when the "-DMACRO" command-line option is used.<p>
+included except when the "-DMACRO" command-line option is used.</p>

-<p>The text in between "<tt>%if</tt> <i>CONDITIONAL</i>" and its
-corresponding <tt>%endif</tt> is included only if <i>CONDITIONAL</i>
-is true.  The CONDITION is one or more macro names, optionally connected
-using the "||" and "&amp;&amp;" binary operators, the "!" unary operator,
-and grouped using balanced parentheses.  Each term is true if the
-corresponding macro exists, and false if it does not exist.</p>
+<p>Note that the argument to <tt>%ifdef</tt> and <tt>%ifndef</tt> must
+be a single preprocessor symbol name, not a general expression.
+There is no "<tt>%else</tt>" directive.</p>

-<p>An optional "<tt>%else</tt>" directive can occur anywhere in between a 
-<tt>%ifdef</tt>, <tt>%ifndef</tt>, or <tt>%if</tt> directive and
-its corresponding <tt>%endif</tt>.</p>
-
-<p>Note that the argument to <tt>%ifdef</tt> and <tt>%ifndef</tt> is
-intended to be a single preprocessor symbol name, not a general expression.
-Use the "<tt>%if</tt>" directive for general expressions.</p>

 <a name='pinclude'></a>
 <h4>The <tt>%include</tt> directive</h4>
@@ -1013,7 +996,7 @@ on the parser's stack associated with terminal and non-terminal
 symbols.  The values of all terminal symbols must be of the same
 type.  This turns out to be the same data type as the 3rd parameter
 to the Parse() function generated by Lemon.  Typically, you will
-make the value of a terminal symbol be a pointer to some kind of
+make the value of a terminal symbol by a pointer to some kind of
 token structure.  Like this:</p>

 <p><pre>
@@ -1,142 +0,0 @@
-# The new-security-options branch
-
-## The problem that the [new-security-options](/timeline?r=new-security-options) branch tries to solve
-
-An attacker might modify the schema of an SQLite database by adding
-structures that cause code to run when some other application opens and
-reads the database.  For example, the attacker might replace a table
-definition with a view.  Or the attacker might add triggers to tables
-or views, or add new CHECK constraints or generated columns or indexes
-with expressions in the index list or in the WHERE clause.  If the
-added features invoke SQL functions or virtual tables with side effects,
-that might cause harm to the system if run by a high-privilege victim.
-Or, the added features might exfiltrate information if the database is
-read by a high-privilege victim.
-
-The changes in this branch strive to make it easier for high-privilege
-applications to safely read SQLite database files that might have been
-maliciously corrupted by an attacker.
-
-## Overview of changes in [new-security-options](/timeline?r=new-security-options)
-
-The basic idea is to tag every SQL function and virtual table with one
-of three risk levels:
-
-  1.  Innocuous
-  2.  Normal
-  3.  Direct-Only
-
-Innocuous functions/vtabs are safe and can be used at any time.
-Direct-only elements, in contrast, might have cause side-effects and
-should only be used from top-level SQL, not from within triggers or views nor
-in elements of the schema such as CHECK constraint, DEFAULT values, 
-generated columns, index expressions, or in the WHERE clause of a 
-partial index that are potentially under the control of an attacker.
-Normal elements behave like Innocuous if TRUSTED\_SCHEMA=on
-and behave like direct-only if TRUSTED\_SCHEMA=off.
-
-Application-defined functions and virtual tables go in as Normal unless
-the application takes deliberate steps to change the risk level.
-
-For backwards compatibility, the default is TRUSTED\_SCHEMA=on.  Documentation
-will be updated to recommend applications turn TRUSTED\_SCHEMA to off.
-
-An innocuous function or virtual table is one that can only read content
-from the database file in which it resides, and can only alter the database
-in which it resides.  Most SQL functions are innocuous.  For example, there
-is no harm in an attacker running the abs() function.
-
-Direct-only elements that have side-effects that go outside the database file
-in which it lives, or return information from outside of the database file.
-Examples of direct-only elements include:
-
-  1.  The fts3\_tokenizer() function
-  2.  The writefile() function
-  3.  The readfile() function
-  4.  The zipvfs virtual table
-  5.  The csv virtual table
-
-We do not want an attacker to be able to add these kinds of things to
-the database schema and possibly trick a high-privilege application 
-from performing any of these actions.  Therefore, functions and vtabs
-with side-effects are marked as Direct-Only.
-
-Legacy applications might add other risky functions or vtabs.  Those will
-go in as "Normal" by default.  For optimal security, we want those risky
-app-defined functions and vtabs to be direct-only, but making that the
-default might break some legacy applications.  Hence, all app-defined
-functions and vtabs go in as Normal, but the application can switch them
-over to "Direct-Only" behavior using a single pragma.
-
-The restrictions on the use of functions and virtual tables do not apply
-to TEMP.  A TEMP VIEW or a TEMP TRIGGER can use any valid SQL function
-or virtual table.  The idea is that TEMP views and triggers must be
-directly created by the application and are thus under the control of the
-application.  TEMP views and triggers cannot be created by an attacker who
-corrupts the schema of a persistent database file.  Hence TEMP views and
-triggers are safe.
-
-## Specific changes
-
-  1.  New sqlite3\_db\_config() option SQLITE\_DBCONFIG\_TRUSTED\_SCHEMA for
-      turning TRUSTED\_SCHEMA on and off.  It defaults to ON.
-
-  2.  Compile-time option -DSQLITE\_TRUSTED\_SCHEMA=0 causes the default
-      TRUSTED\_SCHEMA setting to be off.
-
-  3.  New pragma "PRAGMA trusted\_schema=(ON\|OFF);".  This provides access
-      to the TRUSTED_SCHEMA setting for application coded using scripting
-      languages or other secondary languages where they are unable to make
-      calls to sqlite3\_db\_config().
-
-  4.  New options for the "enc" parameter to sqlite3\_create\_function() and
-      its kin:
-      <ol type="a">
-      <li>  _SQLITE\_INNOCUOUS_  &rarr; tags the new functions as Innocuous
-      <li>  _SQLITE\_DIRECTONLY_ &rarr; tags the new functions as Direct-Only
-      </ol>
-
-  5.  New options to sqlite3\_vtab\_config():
-      <ol type="a">
-      <li>  _SQLITE\_VTAB\_INNOCUOUS_   &rarr; tags the vtab as Innocuous
-      <li>  _SQLITE\_VTAB\_DIRECTONLY_  &rarr; tags the vtab as Direct-Only
-      </ol>
-
-  6.  Change many of the functions and virtual tables in the SQLite source
-      tree to use one of the tags above.
-
-  7.  Enhanced PRAGMA function\_list and virtual-table "pragma\_function\_list"
-      with additional columns.  The columns now are:
-      <ul>
-      <li> _name_      &rarr;  Name of the function
-      <li> _builtin_   &rarr;  1 for built-in functions.  0 otherwise.
-      <li> _type_      &rarr;  's'=Scalar, 'a'=Aggregate, 'w'=Window
-      <li> _enc_       &rarr;  'utf8', 'utf16le', or 'utf16be'
-      <li> _narg_      &rarr;  number of argument
-      <li> _flags_     &rarr;  Bitmask of SQLITE\_INNOCUOUS, SQLITE\_DIRECTONLY,
-                               SQLITE\_DETERMINISTIC, SQLITE\_SUBTYPE, and
-                               SQLITE\_FUNC\_INTERNAL flags.
-      </ul>
-      <p>The last four columns are new.
-
-  8.  The function\_list PRAGMA now also shows all entries for each function.
-      So, for example, if a function can take either 2 or 3 arguments,
-      there are separate rows for the 2-argument and 3-argument versions of
-      the function.
-
-## Additional Notes
-
-The function_list enhancements allow the application to query the set
-of SQL functions that meet various criteria.  For example, to see all
-SQL functions that are never allowed to be used in the schema or in
-trigger or views:
-
-~~~
-    SELECT DISTINCT name FROM pragma_function_list
-     WHERE (flags & 0x80000)!=0
-     ORDER BY name;
-~~~
-
-Doing the same is not possible for virtual tables, as a virtual table
-might be Innocuous, Normal, or Direct-Only depending on the arguments
-passed into the xConnect method.
@@ -1,88 +0,0 @@
-# Wal-Mode Blocking Locks
-
-On some Unix-like systems, SQLite may be configured to use POSIX blocking locks
-by:
-
-  * building the library with SQLITE\_ENABLE\_SETLK\_TIMEOUT defined, and 
-  * configuring a timeout in ms using the sqlite3\_busy\_timeout() API.
-
-Blocking locks may be advantageous as (a) waiting database clients do not
-need to continuously poll the database lock, and (b) using blocking locks
-facilitates transfer of OS priority between processes when a high priority
-process is blocked by a lower priority one.
-
-Only read/write clients use blocking locks. Clients that have read-only access
-to the \*-shm file nevery use blocking locks.
-
-Threads or processes that access a single database at a time never deadlock as
-a result of blocking database locks. But it is of course possible for threads
-that lock multiple databases simultaneously to do so. In most cases the OS will
-detect the deadlock and return an error.
-
-## Wal Recovery
-
-Wal database "recovery" is a process required when the number of connected
-database clients changes from zero to one. In this case, a client is 
-considered to connect to the database when it first reads data from it.
-Before recovery commences, an exclusive WRITER lock is taken. 
-
-Without blocking locks, if two clients attempt recovery simultaneously, one
-fails to obtain the WRITER lock and either invokes the busy-handler callback or
-returns SQLITE\_BUSY to the user. With blocking locks configured, the second
-client blocks on the WRITER lock.
-
-## Database Readers
-
-Usually, read-only are not blocked by any other database clients, so they 
-have no need of blocking locks.
-
-If a read-only transaction is being opened on a snapshot, the CHECKPOINTER
-lock is required briefly as part of opening the transaction (to check that a
-checkpointer is not currently overwriting the snapshot being opened). A
-blocking lock is used to obtain the CHECKPOINTER lock in this case. A snapshot
-opener may therefore block on and transfer priority to a checkpointer in some
-cases.
-
-## Database Writers
-
-A database writer must obtain the exclusive WRITER lock. It uses a blocking
-lock to do so if any of the following are true:
-
-  * the transaction is an implicit one consisting of a single DML or DDL
-    statement, or
-  * the transaction is opened using BEGIN IMMEDIATE or BEGIN EXCLUSIVE, or
-  * the first SQL statement executed following the BEGIN command is a DML or
-    DDL statement (not a read-only statement like a SELECT).
-
-In other words, in all cases except when an open read-transaction is upgraded
-to a write-transaction. In that case a non-blocking lock is used.
-
-## Database Checkpointers
-
-Database checkpointers takes the following locks, in order:
-
-  * The exclusive CHECKPOINTER lock.
-  * The exclusive WRITER lock (FULL, RESTART and TRUNCATE only).
-  * Exclusive lock on read-mark slots 1-N. These are immediately released after being taken.
-  * Exclusive lock on read-mark 0.
-  * Exclusive lock on read-mark slots 1-N again. These are immediately released
-    after being taken (RESTART and TRUNCATE only).
-
-All of the above use blocking locks.
-
-## Summary
-
-With blocking locks configured, the only cases in which clients should see an
-SQLITE\_BUSY error are:
-
-  * if the OS does not grant a blocking lock before the configured timeout
-    expires, and
-  * when an open read-transaction is upgraded to a write-transaction.
-
-In all other cases the blocking locks implementation should prevent clients
-from having to handle SQLITE\_BUSY errors and facilitate appropriate transfer
-of priorities between competing clients.
-
-Clients that lock multiple databases simultaneously must be wary of deadlock.
-
-
@@ -1704,3 +1704,4 @@ int sqlite3async_control(int op, ...){
 }

 #endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ASYNCIO) */
+
@@ -220,3 +220,4 @@ int sqlite3async_control(int op, ...);
 }  /* End of the 'extern "C"' block */
 #endif
 #endif        /* ifndef __SQLITEASYNC_H_ */
+
@@ -37,9 +37,6 @@ proc squish {txt} {

 proc do_setup_rec_test {tn setup sql res} {
  reset_db
-  if {[info exists ::set_main_db_name]} {
-    dbconfig_maindbname_icecube db
-  }
  db eval $setup
  uplevel [list do_rec_test $tn $sql $res]
 }
@@ -79,10 +76,6 @@ foreach {tn setup} {
    }
  }
  3 {
-    if {[info commands sqlite3_expert_new]==""} { continue }
-    set ::set_main_db_name 1
-  }
-  4 {
    if {![file executable $CLI]} { continue }

    proc do_rec_test {tn sql res} {
@@ -141,7 +134,6 @@ do_setup_rec_test $tn.5 {
  SEARCH TABLE t1 USING COVERING INDEX t1_idx_000123a7 (a=?)
 }

-if 0 {
 do_setup_rec_test $tn.6 {
  CREATE TABLE t1(a, b, c);
 } {
@@ -150,7 +142,6 @@ do_setup_rec_test $tn.6 {
  CREATE INDEX t1_idx_00000061 ON t1(a);
  SEARCH TABLE t1 USING COVERING INDEX t1_idx_00000061
 }
-}

 do_setup_rec_test $tn.7 {
  CREATE TABLE t1(a, b, c);
@@ -343,7 +334,7 @@ proc do_candidates_test {tn sql res} {


 reset_db
-do_execsql_test 5.0 {
+do_execsql_test 4.0 {
  CREATE TABLE t1(a, b);
  CREATE TABLE t2(c, d);

@@ -353,7 +344,7 @@ do_execsql_test 5.0 {
  WITH s(i) AS ( VALUES(1) UNION ALL SELECT i+1 FROM s WHERE i<100)
  INSERT INTO t2 SELECT (i-1)/20, (i-1)/5 FROM s;
 }
-do_candidates_test 5.1 {
+do_candidates_test 4.1 {
  SELECT * FROM t1,t2 WHERE (b=? OR a=?) AND (c=? OR d=?)
 } {
  CREATE INDEX t1_idx_00000062 ON t1(b); -- stat1: 100 20 
@@ -362,14 +353,14 @@ do_candidates_test 5.1 {
  CREATE INDEX t2_idx_00000064 ON t2(d); -- stat1: 100 5
 }

-do_candidates_test 5.2 {
+do_candidates_test 4.2 {
  SELECT * FROM t1,t2 WHERE a=? AND b=? AND c=? AND d=?
 } {
  CREATE INDEX t1_idx_000123a7 ON t1(a, b); -- stat1: 100 50 17
  CREATE INDEX t2_idx_0001295b ON t2(c, d); -- stat1: 100 20 5
 }

-do_execsql_test 5.3 {
+do_execsql_test 4.3 {
  CREATE INDEX t1_idx_00000061 ON t1(a); -- stat1: 100 50 
  CREATE INDEX t1_idx_00000062 ON t1(b); -- stat1: 100 20 
  CREATE INDEX t1_idx_000123a7 ON t1(a, b); -- stat1: 100 50 16
@@ -1128,19 +1128,14 @@ int idxFindIndexes(
      /* int iParent = sqlite3_column_int(pExplain, 1); */
      /* int iNotUsed = sqlite3_column_int(pExplain, 2); */
      const char *zDetail = (const char*)sqlite3_column_text(pExplain, 3);
-      int nDetail;
+      int nDetail = STRLEN(zDetail);
      int i;

-      if( !zDetail ) continue;
-      nDetail = STRLEN(zDetail);
-
      for(i=0; i<nDetail; i++){
        const char *zIdx = 0;
-        if( i+13<nDetail && memcmp(&zDetail[i], " USING INDEX ", 13)==0 ){
+        if( memcmp(&zDetail[i], " USING INDEX ", 13)==0 ){
          zIdx = &zDetail[i+13];
-        }else if( i+22<nDetail 
-            && memcmp(&zDetail[i], " USING COVERING INDEX ", 22)==0 
-        ){
+        }else if( memcmp(&zDetail[i], " USING COVERING INDEX ", 22)==0 ){
          zIdx = &zDetail[i+22];
        }
        if( zIdx ){
@@ -1223,7 +1218,7 @@ static int idxProcessOneTrigger(
  IdxTable *pTab = pWrite->pTab;
  const char *zTab = pTab->zName;
  const char *zSql = 
-    "SELECT 'CREATE TEMP' || substr(sql, 7) FROM sqlite_schema "
+    "SELECT 'CREATE TEMP' || substr(sql, 7) FROM sqlite_master "
    "WHERE tbl_name = %Q AND type IN ('table', 'trigger') "
    "ORDER BY type;";
  sqlite3_stmt *pSelect = 0;
@@ -1323,12 +1318,12 @@ static int idxCreateVtabSchema(sqlite3expert *p, char **pzErrmsg){
  **   2) Create the equivalent virtual table in dbv.
  */
  rc = idxPrepareStmt(p->db, &pSchema, pzErrmsg,
-      "SELECT type, name, sql, 1 FROM sqlite_schema "
+      "SELECT type, name, sql, 1 FROM sqlite_master "
      "WHERE type IN ('table','view') AND name NOT LIKE 'sqlite_%%' "
      " UNION ALL "
-      "SELECT type, name, sql, 2 FROM sqlite_schema "
+      "SELECT type, name, sql, 2 FROM sqlite_master "
      "WHERE type = 'trigger'"
-      "  AND tbl_name IN(SELECT name FROM sqlite_schema WHERE type = 'view') "
+      "  AND tbl_name IN(SELECT name FROM sqlite_master WHERE type = 'view') "
      "ORDER BY 4, 1"
  );
  while( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pSchema) ){
@@ -1498,7 +1493,7 @@ static int idxLargestIndex(sqlite3 *db, int *pnMax, char **pzErr){
  int rc = SQLITE_OK;
  const char *zMax = 
    "SELECT max(i.seqno) FROM "
-    "  sqlite_schema AS s, "
+    "  sqlite_master AS s, "
    "  pragma_index_list(s.name) AS l, "
    "  pragma_index_info(l.name) AS i "
    "WHERE s.type = 'table'";
@@ -1651,7 +1646,7 @@ static int idxPopulateStat1(sqlite3expert *p, char **pzErr){

  const char *zAllIndex =
    "SELECT s.rowid, s.name, l.name FROM "
-    "  sqlite_schema AS s, "
+    "  sqlite_master AS s, "
    "  pragma_index_list(s.name) AS l "
    "WHERE s.type = 'table'";
  const char *zIndexXInfo = 
@@ -1725,7 +1720,7 @@ static int idxPopulateStat1(sqlite3expert *p, char **pzErr){
  sqlite3_free(pCtx);

  if( rc==SQLITE_OK ){
-    rc = sqlite3_exec(p->dbm, "ANALYZE sqlite_schema", 0, 0, 0);
+    rc = sqlite3_exec(p->dbm, "ANALYZE sqlite_master", 0, 0, 0);
  }

  sqlite3_exec(p->db, "DROP TABLE IF EXISTS temp."UNIQUE_TABLE_NAME,0,0,0);
@@ -1764,7 +1759,7 @@ sqlite3expert *sqlite3_expert_new(sqlite3 *db, char **pzErrmsg){
  if( rc==SQLITE_OK ){
    sqlite3_stmt *pSql;
    rc = idxPrintfPrepareStmt(pNew->db, &pSql, pzErrmsg, 
-        "SELECT sql FROM sqlite_schema WHERE name NOT LIKE 'sqlite_%%'"
+        "SELECT sql FROM sqlite_master WHERE name NOT LIKE 'sqlite_%%'"
        " AND sql NOT LIKE 'CREATE VIRTUAL %%'"
    );
    while( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pSql) ){
@@ -1955,4 +1950,4 @@ void sqlite3_expert_destroy(sqlite3expert *p){
  }
 }

-#endif /* ifndef SQLITE_OMIT_VIRTUALTABLE */
+#endif /* ifndef SQLITE_OMIT_VIRTUAL_TABLE */
@@ -10,8 +10,8 @@
 **
 *************************************************************************
 */
-#if !defined(SQLITEEXPERT_H)
-#define SQLITEEXPERT_H 1
+
+
 #include "sqlite3.h"

 typedef struct sqlite3expert sqlite3expert;
@@ -165,4 +165,4 @@ const char *sqlite3_expert_report(sqlite3expert*, int iStmt, int eReport);
 */
 void sqlite3_expert_destroy(sqlite3expert*);

-#endif  /* !defined(SQLITEEXPERT_H) */
+
@@ -174,3 +174,5 @@ EXTERNAL CONTENT FTS4 TABLES
  only be useful if the full-text index has somehow become corrupt. It is an
  error to attempt to rebuild the full-text index maintained by a contentless
  FTS4 table.
+
+
@@ -352,7 +352,12 @@ int sqlite3Fts3PutVarint(char *p, sqlite_int64 v){
  v = (*ptr++);                                               \
  if( (v & mask2)==0 ){ var = v; return ret; }

-int sqlite3Fts3GetVarintU(const char *pBuf, sqlite_uint64 *v){
+/* 
+** Read a 64-bit variable-length integer from memory starting at p[0].
+** Return the number of bytes read, or 0 on error.
+** The value is stored in *v.
+*/
+int sqlite3Fts3GetVarint(const char *pBuf, sqlite_int64 *v){
  const unsigned char *p = (const unsigned char*)pBuf;
  const unsigned char *pStart = p;
  u32 a;
@@ -374,41 +379,6 @@ int sqlite3Fts3GetVarintU(const char *pBuf, sqlite_uint64 *v){
  return (int)(p - pStart);
 }

-/* 
-** Read a 64-bit variable-length integer from memory starting at p[0].
-** Return the number of bytes read, or 0 on error.
-** The value is stored in *v.
-*/
-int sqlite3Fts3GetVarint(const char *pBuf, sqlite_int64 *v){
-  return sqlite3Fts3GetVarintU(pBuf, (sqlite3_uint64*)v);
-}
-
-/* 
-** Read a 64-bit variable-length integer from memory starting at p[0] and
-** not extending past pEnd[-1].
-** Return the number of bytes read, or 0 on error.
-** The value is stored in *v.
-*/
-int sqlite3Fts3GetVarintBounded(
-  const char *pBuf,
-  const char *pEnd,
-  sqlite_int64 *v
-){
-  const unsigned char *p = (const unsigned char*)pBuf;
-  const unsigned char *pStart = p;
-  const unsigned char *pX = (const unsigned char*)pEnd;
-  u64 b = 0;
-  int shift;
-  for(shift=0; shift<=63; shift+=7){
-    u64 c = p<pX ? *p : 0;
-    p++;
-    b += (c&0x7F) << shift;
-    if( (c & 0x80)==0 ) break;
-  }
-  *v = b;
-  return (int)(p - pStart);
-}
-
 /*
 ** Similar to sqlite3Fts3GetVarint(), except that the output is truncated to 
 ** a non-negative 32-bit integer before it is returned.
@@ -962,22 +932,6 @@ static char *fts3WriteExprList(Fts3Table *p, const char *zFunc, int *pRc){
  return zRet;
 }

-/*
-** Buffer z contains a positive integer value encoded as utf-8 text.
-** Decode this value and store it in *pnOut, returning the number of bytes
-** consumed. If an overflow error occurs return a negative value.
-*/
-int sqlite3Fts3ReadInt(const char *z, int *pnOut){
-  u64 iVal = 0;
-  int i;
-  for(i=0; z[i]>='0' && z[i]<='9'; i++){
-    iVal = iVal*10 + (z[i] - '0');
-    if( iVal>0x7FFFFFFF ) return -1;
-  }
-  *pnOut = (int)iVal;
-  return i;
-}
-
 /*
 ** This function interprets the string at (*pp) as a non-negative integer
 ** value. It reads the integer and sets *pnOut to the value read, then 
@@ -993,17 +947,19 @@ int sqlite3Fts3ReadInt(const char *z, int *pnOut){
 */
 static int fts3GobbleInt(const char **pp, int *pnOut){
  const int MAX_NPREFIX = 10000000;
+  const char *p;                  /* Iterator pointer */
  int nInt = 0;                   /* Output value */
-  int nByte;
-  nByte = sqlite3Fts3ReadInt(*pp, &nInt);
-  if( nInt>MAX_NPREFIX ){
-    nInt = 0;
-  }
-  if( nByte==0 ){
-    return SQLITE_ERROR;
+
+  for(p=*pp; p[0]>='0' && p[0]<='9'; p++){
+    nInt = nInt * 10 + (p[0] - '0');
+    if( nInt>MAX_NPREFIX ){
+      nInt = 0;
+      break;
+    }
  }
+  if( p==*pp ) return SQLITE_ERROR;
  *pnOut = nInt;
-  *pp += nByte;
+  *pp = p;
  return SQLITE_OK;
 }

@@ -1518,10 +1474,6 @@ static int fts3InitVtab(
  fts3DatabasePageSize(&rc, p);
  p->nNodeSize = p->nPgsz-35;

-#if defined(SQLITE_DEBUG)||defined(SQLITE_TEST)
-  p->nMergeCount = FTS3_MERGE_COUNT;
-#endif
-
  /* Declare the table schema to SQLite. */
  fts3DeclareVtab(&rc, p);

@@ -1617,10 +1569,6 @@ static int fts3BestIndexMethod(sqlite3_vtab *pVTab, sqlite3_index_info *pInfo){
  int iDocidLe = -1;              /* Index of docid<=x constraint, if present */
  int iIdx;

-  if( p->bLock ){
-    return SQLITE_ERROR;
-  }
-
  /* By default use a full table scan. This is an expensive option,
  ** so search through the constraints to see if a more efficient 
  ** strategy is possible.
@@ -1819,11 +1767,7 @@ static int fts3CursorSeekStmt(Fts3Cursor *pCsr){
    }else{
      zSql = sqlite3_mprintf("SELECT %s WHERE rowid = ?", p->zReadExprlist);
      if( !zSql ) return SQLITE_NOMEM;
-      p->bLock++;
-      rc = sqlite3_prepare_v3(
-          p->db, zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0
-      );
-      p->bLock--;
+      rc = sqlite3_prepare_v3(p->db, zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0);
      sqlite3_free(zSql);
    }
    if( rc==SQLITE_OK ) pCsr->bSeekStmt = 1;
@@ -1841,15 +1785,11 @@ static int fts3CursorSeek(sqlite3_context *pContext, Fts3Cursor *pCsr){
  if( pCsr->isRequireSeek ){
    rc = fts3CursorSeekStmt(pCsr);
    if( rc==SQLITE_OK ){
-      Fts3Table *pTab = (Fts3Table*)pCsr->base.pVtab;
-      pTab->bLock++;
      sqlite3_bind_int64(pCsr->pStmt, 1, pCsr->iPrevId);
      pCsr->isRequireSeek = 0;
      if( SQLITE_ROW==sqlite3_step(pCsr->pStmt) ){
-        pTab->bLock--;
        return SQLITE_OK;
      }else{
-        pTab->bLock--;
        rc = sqlite3_reset(pCsr->pStmt);
        if( rc==SQLITE_OK && ((Fts3Table *)pCsr->base.pVtab)->zContentTbl==0 ){
          /* If no row was found and no error has occurred, then the %_content
@@ -1898,7 +1838,6 @@ static int fts3ScanInteriorNode(
  i64 nAlloc = 0;                 /* Size of allocated buffer */
  int isFirstTerm = 1;            /* True when processing first term on page */
  sqlite3_int64 iChild;           /* Block id of child node to descend to */
-  int nBuffer = 0;                /* Total term size */

  /* Skip over the 'height' varint that occurs at the start of every 
  ** interior node. Then load the blockid of the left-child of the b-tree
@@ -1923,15 +1862,12 @@ static int fts3ScanInteriorNode(
    int cmp;                      /* memcmp() result */
    int nSuffix;                  /* Size of term suffix */
    int nPrefix = 0;              /* Size of term prefix */
+    int nBuffer;                  /* Total term size */
  
    /* Load the next term on the node into zBuffer. Use realloc() to expand
    ** the size of zBuffer if required.  */
    if( !isFirstTerm ){
      zCsr += fts3GetVarint32(zCsr, &nPrefix);
-      if( nPrefix>nBuffer ){
-        rc = FTS_CORRUPT_VTAB;
-        goto finish_scan;
-      }
    }
    isFirstTerm = 0;
    zCsr += fts3GetVarint32(zCsr, &nSuffix);
@@ -2025,7 +1961,7 @@ static int fts3SelectLeaf(

  fts3GetVarint32(zNode, &iHeight);
  rc = fts3ScanInteriorNode(zTerm, nTerm, zNode, nNode, piLeaf, piLeaf2);
-  assert_fts3_nc( !piLeaf2 || !piLeaf || rc!=SQLITE_OK || (*piLeaf<=*piLeaf2) );
+  assert( !piLeaf2 || !piLeaf || rc!=SQLITE_OK || (*piLeaf<=*piLeaf2) );

  if( rc==SQLITE_OK && iHeight>1 ){
    char *zBlob = 0;              /* Blob read from %_segments table */
@@ -2045,13 +1981,7 @@ static int fts3SelectLeaf(
      rc = sqlite3Fts3ReadBlock(p, piLeaf?*piLeaf:*piLeaf2, &zBlob, &nBlob, 0);
    }
    if( rc==SQLITE_OK ){
-      int iNewHeight = 0;
-      fts3GetVarint32(zBlob, &iNewHeight);
-      if( iNewHeight>=iHeight ){
-        rc = FTS_CORRUPT_VTAB;
-      }else{
-        rc = fts3SelectLeaf(p, zTerm, nTerm, zBlob, nBlob, piLeaf, piLeaf2);
-      }
+      rc = fts3SelectLeaf(p, zTerm, nTerm, zBlob, nBlob, piLeaf, piLeaf2);
    }
    sqlite3_free(zBlob);
  }
@@ -2068,7 +1998,7 @@ static void fts3PutDeltaVarint(
  sqlite3_int64 *piPrev,          /* IN/OUT: Previous value written to list */
  sqlite3_int64 iVal              /* Write this value to the list */
 ){
-  assert_fts3_nc( iVal-*piPrev > 0 || (*piPrev==0 && iVal==0) );
+  assert( iVal-*piPrev > 0 || (*piPrev==0 && iVal==0) );
  *pp += sqlite3Fts3PutVarint(*pp, iVal-*piPrev);
  *piPrev = iVal;
 }
@@ -2156,11 +2086,10 @@ static void fts3ColumnlistCopy(char **pp, char **ppPoslist){
 }

 /*
-** Value used to signify the end of an position-list. This must be
-** as large or larger than any value that might appear on the
-** position-list, even a position list that has been corrupted.
+** Value used to signify the end of an position-list. This is safe because
+** it is not possible to have a document with 2^31 terms.
 */
-#define POSITION_LIST_END LARGEST_INT64
+#define POSITION_LIST_END 0x7fffffff

 /*
 ** This function is used to help parse position-lists. When this function is
@@ -2185,9 +2114,7 @@ static void fts3ReadNextPos(
  sqlite3_int64 *pi             /* IN/OUT: Value read from position-list */
 ){
  if( (**pp)&0xFE ){
-    int iVal;
-    *pp += fts3GetVarint32((*pp), &iVal);
-    *pi += iVal;
+    fts3GetDeltaVarint(pp, pi);
    *pi -= 2;
  }else{
    *pi = POSITION_LIST_END;
@@ -2238,14 +2165,14 @@ static int fts3PoslistMerge(
      fts3GetVarint32(&p1[1], &iCol1);
      if( iCol1==0 ) return FTS_CORRUPT_VTAB;
    }
-    else if( *p1==POS_END ) iCol1 = 0x7fffffff;
+    else if( *p1==POS_END ) iCol1 = POSITION_LIST_END;
    else iCol1 = 0;

    if( *p2==POS_COLUMN ){
      fts3GetVarint32(&p2[1], &iCol2);
      if( iCol2==0 ) return FTS_CORRUPT_VTAB;
    }
-    else if( *p2==POS_END ) iCol2 = 0x7fffffff;
+    else if( *p2==POS_END ) iCol2 = POSITION_LIST_END;
    else iCol2 = 0;

    if( iCol1==iCol2 ){
@@ -2267,9 +2194,6 @@ static int fts3PoslistMerge(
      */
      fts3GetDeltaVarint(&p1, &i1);
      fts3GetDeltaVarint(&p2, &i2);
-      if( i1<2 || i2<2 ){
-        break;
-      }
      do {
        fts3PutDeltaVarint(&p, &iPrev, (i1<i2) ? i1 : i2); 
        iPrev -= 2;
@@ -2338,7 +2262,7 @@ static int fts3PoslistPhraseMerge(
  /* Never set both isSaveLeft and isExact for the same invocation. */
  assert( isSaveLeft==0 || isExact==0 );

-  assert_fts3_nc( p!=0 && *p1!=0 && *p2!=0 );
+  assert( p!=0 && *p1!=0 && *p2!=0 );
  if( *p1==POS_COLUMN ){ 
    p1++;
    p1 += fts3GetVarint32(p1, &iCol1);
@@ -2511,12 +2435,12 @@ static void fts3GetDeltaVarint3(
  if( *pp>=pEnd ){
    *pp = 0;
  }else{
-    u64 iVal;
-    *pp += sqlite3Fts3GetVarintU(*pp, &iVal);
+    sqlite3_int64 iVal;
+    *pp += sqlite3Fts3GetVarint(*pp, &iVal);
    if( bDescIdx ){
-      *pVal = (i64)((u64)*pVal - iVal);
+      *pVal -= iVal;
    }else{
-      *pVal = (i64)((u64)*pVal + iVal);
+      *pVal += iVal;
    }
  }
 }
@@ -2543,16 +2467,14 @@ static void fts3PutDeltaVarint3(
  int *pbFirst,                   /* IN/OUT: True after first int written */
  sqlite3_int64 iVal              /* Write this value to the list */
 ){
-  sqlite3_uint64 iWrite;
+  sqlite3_int64 iWrite;
  if( bDescIdx==0 || *pbFirst==0 ){
-    assert_fts3_nc( *pbFirst==0 || iVal>=*piPrev );
-    iWrite = (u64)iVal - (u64)*piPrev;
+    iWrite = iVal - *piPrev;
  }else{
-    assert_fts3_nc( *piPrev>=iVal );
-    iWrite = (u64)*piPrev - (u64)iVal;
+    iWrite = *piPrev - iVal;
  }
  assert( *pbFirst || *piPrev==0 );
-  assert_fts3_nc( *pbFirst==0 || iWrite>0 );
+  assert( *pbFirst==0 || iWrite>0 );
  *pp += sqlite3Fts3PutVarint(*pp, iWrite);
  *piPrev = iVal;
  *pbFirst = 1;
@@ -2568,8 +2490,7 @@ static void fts3PutDeltaVarint3(
 ** Using this makes it easier to write code that can merge doclists that are
 ** sorted in either ascending or descending order.
 */
-/* #define DOCID_CMP(i1, i2) ((bDescDoclist?-1:1) * (i64)((u64)i1-i2)) */
-#define DOCID_CMP(i1, i2) ((bDescDoclist?-1:1) * (i1>i2?1:((i1==i2)?0:-1)))
+#define DOCID_CMP(i1, i2) ((bDescDoclist?-1:1) * (i1-i2))

 /*
 ** This function does an "OR" merge of two doclists (output contains all
@@ -2659,8 +2580,6 @@ static int fts3DoclistOrMerge(
      fts3PoslistCopy(&p, &p2);
      fts3GetDeltaVarint3(&p2, pEnd2, bDescDoclist, &i2);
    }
-    
-    assert( (p-aOut)<=((p1?(p1-a1):n1)+(p2?(p2-a2):n2)+FTS3_VARINT_MAX-1) );
  }

  if( rc!=SQLITE_OK ){
@@ -2983,7 +2902,7 @@ static int fts3SegReaderCursor(
  ** Fts3SegReaderPending might segfault, as the data structures used by 
  ** fts4aux are not completely populated. So it's easiest to filter these
  ** calls out here.  */
-  if( iLevel<0 && p->aIndex && p->iPrevLangid==iLangid ){
+  if( iLevel<0 && p->aIndex ){
    Fts3SegReader *pSeg = 0;
    rc = sqlite3Fts3SegReaderPending(p, iIndex, zTerm, nTerm, isPrefix||isScan, &pSeg);
    if( rc==SQLITE_OK && pSeg ){
@@ -3246,8 +3165,6 @@ static int fts3NextMethod(sqlite3_vtab_cursor *pCursor){
  int rc;
  Fts3Cursor *pCsr = (Fts3Cursor *)pCursor;
  if( pCsr->eSearch==FTS3_DOCID_SEARCH || pCsr->eSearch==FTS3_FULLSCAN_SEARCH ){
-    Fts3Table *pTab = (Fts3Table*)pCursor->pVtab;
-    pTab->bLock++;
    if( SQLITE_ROW!=sqlite3_step(pCsr->pStmt) ){
      pCsr->isEof = 1;
      rc = sqlite3_reset(pCsr->pStmt);
@@ -3255,7 +3172,6 @@ static int fts3NextMethod(sqlite3_vtab_cursor *pCursor){
      pCsr->iPrevId = sqlite3_column_int64(pCsr->pStmt, 0);
      rc = SQLITE_OK;
    }
-    pTab->bLock--;
  }else{
    rc = fts3EvalNext((Fts3Cursor *)pCursor);
  }
@@ -3263,6 +3179,18 @@ static int fts3NextMethod(sqlite3_vtab_cursor *pCursor){
  return rc;
 }

+/*
+** The following are copied from sqliteInt.h.
+**
+** Constants for the largest and smallest possible 64-bit signed integers.
+** These macros are designed to work correctly on both 32-bit and 64-bit
+** compilers.
+*/
+#ifndef SQLITE_AMALGAMATION
+# define LARGEST_INT64  (0xffffffff|(((sqlite3_int64)0x7fffffff)<<32))
+# define SMALLEST_INT64 (((sqlite3_int64)-1) - LARGEST_INT64)
+#endif
+
 /*
 ** If the numeric type of argument pVal is "integer", then return it
 ** converted to a 64-bit signed integer. Otherwise, return a copy of
@@ -3316,10 +3244,6 @@ static int fts3FilterMethod(
  UNUSED_PARAMETER(idxStr);
  UNUSED_PARAMETER(nVal);

-  if( p->bLock ){
-    return SQLITE_ERROR;
-  }
-
  eSearch = (idxNum & 0x0000FFFF);
  assert( eSearch>=0 && eSearch<=(FTS3_FULLTEXT_SEARCH+p->nColumn) );
  assert( p->pSegments==0 );
@@ -3391,11 +3315,7 @@ static int fts3FilterMethod(
      );
    }
    if( zSql ){
-      p->bLock++;
-      rc = sqlite3_prepare_v3(
-          p->db,zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0
-      );
-      p->bLock--;
+      rc = sqlite3_prepare_v3(p->db,zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0);
      sqlite3_free(zSql);
    }else{
      rc = SQLITE_NOMEM;
@@ -4412,7 +4332,7 @@ static int fts3EvalPhraseStart(Fts3Cursor *pCsr, int bOptOk, Fts3Phrase *p){
  int bIncrOk = (bOptOk 
   && pCsr->bDesc==pTab->bDescIdx 
   && p->nToken<=MAX_INCR_PHRASE_TOKENS && p->nToken>0
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
+#ifdef SQLITE_TEST
   && pTab->bNoIncrDoclist==0
 #endif
  );
@@ -4523,7 +4443,7 @@ void sqlite3Fts3DoclistNext(

  assert( nDoclist>0 );
  assert( *pbEof==0 );
-  assert_fts3_nc( p || *piDocid==0 );
+  assert( p || *piDocid==0 );
  assert( !p || (p>=aDoclist && p<=&aDoclist[nDoclist]) );

  if( p==0 ){
@@ -4554,16 +4474,15 @@ static void fts3EvalDlPhraseNext(
  u8 *pbEof
 ){
  char *pIter;                            /* Used to iterate through aAll */
-  char *pEnd;                             /* 1 byte past end of aAll */
+  char *pEnd = &pDL->aAll[pDL->nAll];     /* 1 byte past end of aAll */
 
  if( pDL->pNextDocid ){
    pIter = pDL->pNextDocid;
-    assert( pDL->aAll!=0 || pIter==0 );
  }else{
    pIter = pDL->aAll;
  }

-  if( pIter==0 || pIter>=(pEnd = pDL->aAll + pDL->nAll) ){
+  if( pIter>=pEnd ){
    /* We have already reached the end of this doclist. EOF. */
    *pbEof = 1;
  }else{
@@ -4935,13 +4854,12 @@ static int fts3EvalAverageDocsize(Fts3Cursor *pCsr, int *pnPage){
    rc = sqlite3Fts3SelectDoctotal(p, &pStmt);
    if( rc!=SQLITE_OK ) return rc;
    a = sqlite3_column_blob(pStmt, 0);
-    testcase( a==0 );  /* If %_stat.value set to X'' */
-    if( a ){
-      pEnd = &a[sqlite3_column_bytes(pStmt, 0)];
-      a += sqlite3Fts3GetVarintBounded(a, pEnd, &nDoc);
-      while( a<pEnd ){
-        a += sqlite3Fts3GetVarintBounded(a, pEnd, &nByte);
-      }
+    assert( a );
+
+    pEnd = &a[sqlite3_column_bytes(pStmt, 0)];
+    a += sqlite3Fts3GetVarint(a, &nDoc);
+    while( a<pEnd ){
+      a += sqlite3Fts3GetVarint(a, &nByte);
    }
    if( nDoc==0 || nByte==0 ){
      sqlite3_reset(pStmt);
@@ -5173,7 +5091,7 @@ static void fts3EvalInvalidatePoslist(Fts3Phrase *pPhrase){
 **
 ** Parameter nNear is passed the NEAR distance of the expression (5 in
 ** the example above). When this function is called, *paPoslist points to
-** the position list, and *pnToken is the number of phrase tokens in the
+** the position list, and *pnToken is the number of phrase tokens in, the
 ** phrase on the other side of the NEAR operator to pPhrase. For example,
 ** if pPhrase refers to the "def ghi" phrase, then *paPoslist points to
 ** the position list associated with phrase "abc".
@@ -5208,12 +5126,10 @@ static int fts3EvalNearTrim(
  );
  if( res ){
    nNew = (int)(pOut - pPhrase->doclist.pList) - 1;
-    if( nNew>=0 ){
-      assert( pPhrase->doclist.pList[nNew]=='\0' );
-      assert( nNew<=pPhrase->doclist.nList && nNew>0 );
-      memset(&pPhrase->doclist.pList[nNew], 0, pPhrase->doclist.nList - nNew);
-      pPhrase->doclist.nList = nNew;
-    }
+    assert( pPhrase->doclist.pList[nNew]=='\0' );
+    assert( nNew<=pPhrase->doclist.nList && nNew>0 );
+    memset(&pPhrase->doclist.pList[nNew], 0, pPhrase->doclist.nList - nNew);
+    pPhrase->doclist.nList = nNew;
    *paPoslist = pPhrase->doclist.pList;
    *pnToken = pPhrase->nToken;
  }
@@ -5322,7 +5238,6 @@ static void fts3EvalNextRow(
                fts3EvalNextRow(pCsr, pLeft, pRc);
              }
            }
-            pRight->bEof = pLeft->bEof = 1;
          }
        }
        break;
@@ -5565,10 +5480,7 @@ static int fts3EvalTestExpr(
        }else
 #endif
        {
-          bHit = ( 
-              pExpr->bEof==0 && pExpr->iDocid==pCsr->iPrevId
-           && pExpr->pPhrase->doclist.nList>0
-          );
+          bHit = (pExpr->bEof==0 && pExpr->iDocid==pCsr->iPrevId);
        }
        break;
      }
@@ -5831,8 +5743,7 @@ static int fts3EvalGatherStats(
      fts3EvalRestart(pCsr, pRoot, &rc);
      do {
        fts3EvalNextRow(pCsr, pRoot, &rc);
-        assert_fts3_nc( pRoot->bEof==0 );
-        if( pRoot->bEof ) rc = FTS_CORRUPT_VTAB;
+        assert( pRoot->bEof==0 );
      }while( pRoot->iDocid!=iDocid && rc==SQLITE_OK );
    }
  }
@@ -196,9 +196,6 @@ typedef sqlite3_int64 i64;        /* 8-byte signed integer */
 # define TESTONLY(X)
 #endif

-#define LARGEST_INT64  (0xffffffff|(((i64)0x7fffffff)<<32))
-#define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64)
-
 #endif /* SQLITE_AMALGAMATION */

 #ifdef SQLITE_DEBUG
@@ -242,7 +239,6 @@ struct Fts3Table {
  char *zLanguageid;              /* languageid=xxx option, or NULL */
  int nAutoincrmerge;             /* Value configured by 'automerge' */
  u32 nLeafAdd;                   /* Number of leaf blocks added this trans */
-  int bLock;                      /* Used to prevent recursive content= tbls */

  /* Precompiled statements used by the implementation. Each of these 
  ** statements is run and reset within a single virtual table API call. 
@@ -301,23 +297,13 @@ struct Fts3Table {
  int mxSavepoint;       /* Largest valid xSavepoint integer */
 #endif

-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
+#ifdef SQLITE_TEST
  /* True to disable the incremental doclist optimization. This is controled
  ** by special insert command 'test-no-incr-doclist'.  */
  int bNoIncrDoclist;
-
-  /* Number of segments in a level */
-  int nMergeCount;
 #endif
 };

-/* Macro to find the number of segments to merge */
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-# define MergeCount(P) ((P)->nMergeCount)
-#else
-# define MergeCount(P) FTS3_MERGE_COUNT
-#endif
-
 /*
 ** When the core wants to read from the virtual table, it creates a
 ** virtual table cursor (an instance of the following structure) using
@@ -581,8 +567,6 @@ int sqlite3Fts3Incrmerge(Fts3Table*,int,int);
 void sqlite3Fts3ErrMsg(char**,const char*,...);
 int sqlite3Fts3PutVarint(char *, sqlite3_int64);
 int sqlite3Fts3GetVarint(const char *, sqlite_int64 *);
-int sqlite3Fts3GetVarintU(const char *, sqlite_uint64 *);
-int sqlite3Fts3GetVarintBounded(const char*,const char*,sqlite3_int64*);
 int sqlite3Fts3GetVarint32(const char *, int *);
 int sqlite3Fts3VarintLen(sqlite3_uint64);
 void sqlite3Fts3Dequote(char *);
@@ -591,7 +575,6 @@ int sqlite3Fts3EvalPhraseStats(Fts3Cursor *, Fts3Expr *, u32 *);
 int sqlite3Fts3FirstFilter(sqlite3_int64, char *, int, char *);
 void sqlite3Fts3CreateStatTable(int*, Fts3Table*);
 int sqlite3Fts3EvalTestDeferred(Fts3Cursor *pCsr, int *pRc);
-int sqlite3Fts3ReadInt(const char *z, int *pnOut);

 /* fts3_tokenizer.c */
 const char *sqlite3Fts3NextToken(const char *, int *);
@@ -446,7 +446,10 @@ static int getNextNode(
      if( pKey->eType==FTSQUERY_NEAR ){
        assert( nKey==4 );
        if( zInput[4]=='/' && zInput[5]>='0' && zInput[5]<='9' ){
-          nKey += 1+sqlite3Fts3ReadInt(&zInput[nKey+1], &nNear);
+          nNear = 0;
+          for(nKey=5; zInput[nKey]>='0' && zInput[nKey]<='9'; nKey++){
+            nNear = nNear * 10 + (zInput[nKey] - '0');
+          }
        }
      }

@@ -433,10 +433,10 @@ static void fts3SnippetDetails(

      while( iCsr<(iStart+pIter->nSnippet) && iCsr>=iStart ){
        int j;
-        u64 mPhrase = (u64)1 << (i%64);
+        u64 mPhrase = (u64)1 << i;
        u64 mPos = (u64)1 << (iCsr - iStart);
        assert( iCsr>=iStart && (iCsr - iStart)<=64 );
-        assert( i>=0 );
+        assert( i>=0 && i<=64 );
        if( (mCover|mCovered)&mPhrase ){
          iScore++;
        }else{
@@ -560,7 +560,7 @@ static int fts3BestSnippet(
    /* Set the *pmSeen output variable. */
    for(i=0; i<nList; i++){
      if( sIter.aPhrase[i].pHead ){
-        *pmSeen |= (u64)1 << (i%64);
+        *pmSeen |= (u64)1 << i;
      }
    }

@@ -876,7 +876,7 @@ static int fts3ExprLHits(
    iStart = pExpr->iPhrase * ((p->nCol + 31) / 32);
  }

-  if( pIter ) while( 1 ){
+  while( 1 ){
    int nHit = fts3ColumnlistCount(&pIter);
    if( (pPhrase->iColumn>=pTab->nColumn || pPhrase->iColumn==iCol) ){
      if( p->flag==FTS3_MATCHINFO_LHITS ){
@@ -1038,15 +1038,11 @@ static int fts3MatchinfoSelectDoctotal(
  Fts3Table *pTab,
  sqlite3_stmt **ppStmt,
  sqlite3_int64 *pnDoc,
-  const char **paLen,
-  const char **ppEnd
+  const char **paLen
 ){
  sqlite3_stmt *pStmt;
  const char *a;
-  const char *pEnd;
  sqlite3_int64 nDoc;
-  int n;
-

  if( !*ppStmt ){
    int rc = sqlite3Fts3SelectDoctotal(pTab, ppStmt);
@@ -1055,20 +1051,12 @@ static int fts3MatchinfoSelectDoctotal(
  pStmt = *ppStmt;
  assert( sqlite3_data_count(pStmt)==1 );

-  n = sqlite3_column_bytes(pStmt, 0);
  a = sqlite3_column_blob(pStmt, 0);
-  if( a==0 ){
-    return FTS_CORRUPT_VTAB;
-  }
-  pEnd = a + n;
-  a += sqlite3Fts3GetVarintBounded(a, pEnd, &nDoc);
-  if( nDoc<=0 || a>pEnd ){
-    return FTS_CORRUPT_VTAB;
-  }
-  *pnDoc = nDoc;
+  a += sqlite3Fts3GetVarint(a, &nDoc);
+  if( nDoc==0 ) return FTS_CORRUPT_VTAB;
+  *pnDoc = (u32)nDoc;

  if( paLen ) *paLen = a;
-  if( ppEnd ) *ppEnd = pEnd;
  return SQLITE_OK;
 }

@@ -1249,7 +1237,7 @@ static int fts3MatchinfoValues(
      case FTS3_MATCHINFO_NDOC:
        if( bGlobal ){
          sqlite3_int64 nDoc = 0;
-          rc = fts3MatchinfoSelectDoctotal(pTab, &pSelect, &nDoc, 0, 0);
+          rc = fts3MatchinfoSelectDoctotal(pTab, &pSelect, &nDoc, 0);
          pInfo->aMatchinfo[0] = (u32)nDoc;
        }
        break;
@@ -1258,19 +1246,14 @@ static int fts3MatchinfoValues(
        if( bGlobal ){
          sqlite3_int64 nDoc;     /* Number of rows in table */
          const char *a;          /* Aggregate column length array */
-          const char *pEnd;       /* First byte past end of length array */

-          rc = fts3MatchinfoSelectDoctotal(pTab, &pSelect, &nDoc, &a, &pEnd);
+          rc = fts3MatchinfoSelectDoctotal(pTab, &pSelect, &nDoc, &a);
          if( rc==SQLITE_OK ){
            int iCol;
            for(iCol=0; iCol<pInfo->nCol; iCol++){
              u32 iVal;
              sqlite3_int64 nToken;
              a += sqlite3Fts3GetVarint(a, &nToken);
-              if( a>pEnd ){
-                rc = SQLITE_CORRUPT_VTAB;
-                break;
-              }
              iVal = (u32)(((u32)(nToken&0xffffffff)+nDoc/2)/nDoc);
              pInfo->aMatchinfo[iCol] = iVal;
            }
@@ -1284,14 +1267,9 @@ static int fts3MatchinfoValues(
        if( rc==SQLITE_OK ){
          int iCol;
          const char *a = sqlite3_column_blob(pSelectDocsize, 0);
-          const char *pEnd = a + sqlite3_column_bytes(pSelectDocsize, 0);
          for(iCol=0; iCol<pInfo->nCol; iCol++){
            sqlite3_int64 nToken;
-            a += sqlite3Fts3GetVarintBounded(a, pEnd, &nToken);
-            if( a>pEnd ){
-              rc = SQLITE_CORRUPT_VTAB;
-              break;
-            }
+            a += sqlite3Fts3GetVarint(a, &nToken);
            pInfo->aMatchinfo[iCol] = (u32)nToken;
          }
        }
@@ -1322,7 +1300,7 @@ static int fts3MatchinfoValues(
        if( rc!=SQLITE_OK ) break;
        if( bGlobal ){
          if( pCsr->pDeferred ){
-            rc = fts3MatchinfoSelectDoctotal(pTab, &pSelect, &pInfo->nDoc,0,0);
+            rc = fts3MatchinfoSelectDoctotal(pTab, &pSelect, &pInfo->nDoc, 0);
            if( rc!=SQLITE_OK ) break;
          }
          rc = fts3ExprIterate(pExpr, fts3ExprGlobalHitsCb,(void*)pInfo);
@@ -350,7 +350,7 @@ static int fts3tokFilterMethod(
    if( pCsr->zInput==0 ){
      rc = SQLITE_NOMEM;
    }else{
-      if( nByte>0 ) memcpy(pCsr->zInput, zByte, nByte);
+      memcpy(pCsr->zInput, zByte, nByte);
      pCsr->zInput[nByte] = 0;
      rc = pTab->pMod->xOpen(pTab->pTok, pCsr->zInput, nByte, &pCsr->pCsr);
      if( rc==SQLITE_OK ){
@@ -390,9 +390,7 @@ int queryTokenizer(

  sqlite3_bind_text(pStmt, 1, zName, -1, SQLITE_STATIC);
  if( SQLITE_ROW==sqlite3_step(pStmt) ){
-    if( sqlite3_column_type(pStmt, 0)==SQLITE_BLOB
-     && sqlite3_column_bytes(pStmt, 0)==sizeof(*pp)
-    ){
+    if( sqlite3_column_type(pStmt, 0)==SQLITE_BLOB ){
      memcpy((void *)pp, sqlite3_column_blob(pStmt, 0), sizeof(*pp));
    }
  }
@@ -481,7 +479,7 @@ int sqlite3Fts3InitHashTable(
 ){
  int rc = SQLITE_OK;
  void *p = (void *)pHash;
-  const int any = SQLITE_UTF8|SQLITE_DIRECTONLY;
+  const int any = SQLITE_ANY;

 #ifdef SQLITE_TEST
  char *zTest = 0;
@@ -23,7 +23,7 @@
 #include <string.h>
 #include <assert.h>
 #include <stdlib.h>
-#include <stdio.h>
+

 #define FTS_MAX_APPENDABLE_HEIGHT 16

@@ -67,7 +67,7 @@ int test_fts3_node_chunk_threshold = (4*1024)*4;
 #endif

 /*
-** The values that may be meaningfully bound to the :1 parameter in
+** The two values that may be meaningfully bound to the :1 parameter in
 ** statements SQL_REPLACE_STAT and SQL_SELECT_STAT.
 */
 #define FTS_STAT_DOCTOTAL      0
@@ -335,15 +335,13 @@ static int fts3SqlStmt(
 ** returns zero rows.  */
 /* 28 */ "SELECT level, count(*) AS cnt FROM %Q.'%q_segdir' "
         "  GROUP BY level HAVING cnt>=?"
-         "  ORDER BY (level %% 1024) ASC, 2 DESC LIMIT 1",
+         "  ORDER BY (level %% 1024) ASC LIMIT 1",

 /* Estimate the upper limit on the number of leaf nodes in a new segment
 ** created by merging the oldest :2 segments from absolute level :1. See 
 ** function sqlite3Fts3Incrmerge() for details.  */
 /* 29 */ "SELECT 2 * total(1 + leaves_end_block - start_block) "
-         "  FROM (SELECT * FROM %Q.'%q_segdir' "
-         "        WHERE level = ? ORDER BY idx ASC LIMIT ?"
-         "  )",
+         "  FROM %Q.'%q_segdir' WHERE level = ? AND idx < ?",

 /* SQL_DELETE_SEGDIR_ENTRY
 **   Delete the %_segdir entry on absolute level :1 with index :2.  */
@@ -698,7 +696,7 @@ static int fts3PendingListAppend(
  assert( !p || p->iLastDocid<=iDocid );

  if( !p || p->iLastDocid!=iDocid ){
-    u64 iDelta = (u64)iDocid - (u64)(p ? p->iLastDocid : 0);
+    sqlite3_int64 iDelta = iDocid - (p ? p->iLastDocid : 0);
    if( p ){
      assert( p->nData<p->nSpace );
      assert( p->aData[p->nData]==0 );
@@ -1155,7 +1153,7 @@ static int fts3AllocateSegdirIdx(
    ** segment and allocate (newly freed) index 0 at level iLevel. Otherwise,
    ** if iNext is less than FTS3_MERGE_COUNT, allocate index iNext.
    */
-    if( iNext>=MergeCount(p) ){
+    if( iNext>=FTS3_MERGE_COUNT ){
      fts3LogMerge(16, getAbsoluteLevel(p, iLangid, iIndex, iLevel));
      rc = fts3SegmentMerge(p, iLangid, iIndex, iLevel);
      *piIdx = 0;
@@ -1239,8 +1237,6 @@ int sqlite3Fts3ReadBlock(
      }
      *paBlob = aByte;
    }
-  }else if( rc==SQLITE_ERROR ){
-    rc = FTS_CORRUPT_VTAB;
  }

  return rc;
@@ -1383,7 +1379,7 @@ static int fts3SegReaderNext(
  pNext += fts3GetVarint32(pNext, &nSuffix);
  if( nSuffix<=0 
   || (&pReader->aNode[pReader->nNode] - pNext)<nSuffix
-   || nPrefix>pReader->nTerm
+   || nPrefix>pReader->nTermAlloc
  ){
    return FTS_CORRUPT_VTAB;
  }
@@ -1417,7 +1413,6 @@ static int fts3SegReaderNext(
  */
  if( pReader->nDoclist > pReader->nNode-(pReader->aDoclist-pReader->aNode)
   || (pReader->nPopulate==0 && pReader->aDoclist[pReader->nDoclist-1])
-   || pReader->nDoclist==0
  ){
    return FTS_CORRUPT_VTAB;
  }
@@ -1534,18 +1529,18 @@ static int fts3SegReaderNextDocid(
    }else{
      rc = fts3SegReaderRequire(pReader, p, FTS3_VARINT_MAX);
      if( rc==SQLITE_OK ){
-        u64 iDelta;
-        pReader->pOffsetList = p + sqlite3Fts3GetVarintU(p, &iDelta);
+        sqlite3_int64 iDelta;
+        pReader->pOffsetList = p + sqlite3Fts3GetVarint(p, &iDelta);
        if( pTab->bDescIdx ){
-          pReader->iDocid = (i64)((u64)pReader->iDocid - iDelta);
+          pReader->iDocid -= iDelta;
        }else{
-          pReader->iDocid = (i64)((u64)pReader->iDocid + iDelta);
+          pReader->iDocid += iDelta;
        }
      }
    }
  }

-  return rc;
+  return SQLITE_OK;
 }


@@ -2035,11 +2030,6 @@ static int fts3NodeAddTerm(
    nPrefix = fts3PrefixCompress(pTree->zTerm, pTree->nTerm, zTerm, nTerm);
    nSuffix = nTerm-nPrefix;

-    /* If nSuffix is zero or less, then zTerm/nTerm must be a prefix of 
-    ** pWriter->zTerm/pWriter->nTerm. i.e. must be equal to or less than when
-    ** compared with BINARY collation. This indicates corruption.  */
-    if( nSuffix<=0 ) return FTS_CORRUPT_VTAB;
-
    nReq += sqlite3Fts3VarintLen(nPrefix)+sqlite3Fts3VarintLen(nSuffix)+nSuffix;
    if( nReq<=p->nNodeSize || !pTree->zTerm ){

@@ -2284,7 +2274,6 @@ static int fts3SegWriterAdd(
    int rc;

    /* The current leaf node is full. Write it out to the database. */
-    if( pWriter->iFree==LARGEST_INT64 ) return FTS_CORRUPT_VTAB;
    rc = fts3WriteSegment(p, pWriter->iFree++, pWriter->aData, nData);
    if( rc!=SQLITE_OK ) return rc;
    p->nLeafAdd++;
@@ -2334,11 +2323,9 @@ static int fts3SegWriterAdd(
  /* Append the prefix-compressed term and doclist to the buffer. */
  nData += sqlite3Fts3PutVarint(&pWriter->aData[nData], nPrefix);
  nData += sqlite3Fts3PutVarint(&pWriter->aData[nData], nSuffix);
-  assert( nSuffix>0 );
  memcpy(&pWriter->aData[nData], &zTerm[nPrefix], nSuffix);
  nData += nSuffix;
  nData += sqlite3Fts3PutVarint(&pWriter->aData[nData], nDoclist);
-  assert( nDoclist>0 );
  memcpy(&pWriter->aData[nData], aDoclist, nDoclist);
  pWriter->nData = nData + nDoclist;

@@ -2358,7 +2345,6 @@ static int fts3SegWriterAdd(
      pWriter->zTerm = zNew;
    }
    assert( pWriter->zTerm==pWriter->zMalloc );
-    assert( nTerm>0 );
    memcpy(pWriter->zTerm, zTerm, nTerm);
  }else{
    pWriter->zTerm = (char *)zTerm;
@@ -2505,7 +2491,7 @@ static int fts3SegmentIsMaxLevel(Fts3Table *p, i64 iAbsLevel, int *pbMax){
  if( rc!=SQLITE_OK ) return rc;
  sqlite3_bind_int64(pStmt, 1, iAbsLevel+1);
  sqlite3_bind_int64(pStmt, 2, 
-      (((u64)iAbsLevel/FTS3_SEGDIR_MAXLEVEL)+1) * FTS3_SEGDIR_MAXLEVEL
+      ((iAbsLevel/FTS3_SEGDIR_MAXLEVEL)+1) * FTS3_SEGDIR_MAXLEVEL
  );

  *pbMax = 0;
@@ -2633,14 +2619,14 @@ static void fts3ColumnFilter(

    nList -= (int)(p - pList);
    pList = p;
-    if( nList<=0 ){
+    if( nList==0 ){
      break;
    }
    p = &pList[1];
    p += fts3GetVarint32(p, &iCurrent);
  }

-  if( bZero && (pEnd - &pList[nList])>0){
+  if( bZero && &pList[nList]!=pEnd ){
    memset(&pList[nList], 0, pEnd - &pList[nList]);
  }
  *ppList = pList;
@@ -2667,7 +2653,6 @@ static int fts3MsrBufferData(
    pMsr->aBuffer = pNew;
  }

-  assert( nList>0 );
  memcpy(pMsr->aBuffer, pList, nList);
  return SQLITE_OK;
 }
@@ -2855,19 +2840,6 @@ int sqlite3Fts3MsrIncrRestart(Fts3MultiSegReader *pCsr){
  return SQLITE_OK;
 }

-static int fts3GrowSegReaderBuffer(Fts3MultiSegReader *pCsr, int nReq){
-  if( nReq>pCsr->nBuffer ){
-    char *aNew;
-    pCsr->nBuffer = nReq*2;
-    aNew = sqlite3_realloc(pCsr->aBuffer, pCsr->nBuffer);
-    if( !aNew ){
-      return SQLITE_NOMEM;
-    }
-    pCsr->aBuffer = aNew;
-  }
-  return SQLITE_OK;
-}
-

 int sqlite3Fts3SegReaderStep(
  Fts3Table *p,                   /* Virtual table handle */
@@ -2994,17 +2966,25 @@ int sqlite3Fts3SegReaderStep(
          ** doclist. */
          sqlite3_int64 iDelta;
          if( p->bDescIdx && nDoclist>0 ){
-            if( iPrev<=iDocid ) return FTS_CORRUPT_VTAB;
-            iDelta = (i64)((u64)iPrev - (u64)iDocid);
+            iDelta = iPrev - iDocid;
          }else{
-            if( nDoclist>0 && iPrev>=iDocid ) return FTS_CORRUPT_VTAB;
-            iDelta = (i64)((u64)iDocid - (u64)iPrev);
+            iDelta = iDocid - iPrev;
          }
+          if( iDelta<=0 && (nDoclist>0 || iDelta!=iDocid) ){
+            return FTS_CORRUPT_VTAB;
+          }
+          assert( nDoclist>0 || iDelta==iDocid );

          nByte = sqlite3Fts3VarintLen(iDelta) + (isRequirePos?nList+1:0);
-
-          rc = fts3GrowSegReaderBuffer(pCsr, nByte+nDoclist);
-          if( rc ) return rc;
+          if( nDoclist+nByte>pCsr->nBuffer ){
+            char *aNew;
+            pCsr->nBuffer = (nDoclist+nByte)*2;
+            aNew = sqlite3_realloc(pCsr->aBuffer, pCsr->nBuffer);
+            if( !aNew ){
+              return SQLITE_NOMEM;
+            }
+            pCsr->aBuffer = aNew;
+          }

          if( isFirst ){
            char *a = &pCsr->aBuffer[nDoclist];
@@ -3029,9 +3009,6 @@ int sqlite3Fts3SegReaderStep(
        fts3SegReaderSort(apSegment, nMerge, j, xCmp);
      }
      if( nDoclist>0 ){
-        rc = fts3GrowSegReaderBuffer(pCsr, nDoclist+FTS3_NODE_PADDING);
-        if( rc ) return rc;
-        memset(&pCsr->aBuffer[nDoclist], 0, FTS3_NODE_PADDING);
        pCsr->aDoclist = pCsr->aBuffer;
        pCsr->nDoclist = nDoclist;
        rc = SQLITE_ROW;
@@ -3081,11 +3058,11 @@ static void fts3ReadEndBlockField(
  if( zText ){
    int i;
    int iMul = 1;
-    u64 iVal = 0;
+    i64 iVal = 0;
    for(i=0; zText[i]>='0' && zText[i]<='9'; i++){
      iVal = iVal*10 + (zText[i] - '0');
    }
-    *piEndBlock = (i64)iVal;
+    *piEndBlock = iVal;
    while( zText[i]==' ' ) i++;
    iVal = 0;
    if( zText[i]=='-' ){
@@ -3095,7 +3072,7 @@ static void fts3ReadEndBlockField(
    for(/* no-op */; zText[i]>='0' && zText[i]<='9'; i++){
      iVal = iVal*10 + (zText[i] - '0');
    }
-    *pnByte = ((i64)iVal * (i64)iMul);
+    *pnByte = (iVal * (i64)iMul);
  }
 }

@@ -3278,7 +3255,7 @@ static int fts3SegmentMerge(
        csr.zTerm, csr.nTerm, csr.aDoclist, csr.nDoclist);
  }
  if( rc!=SQLITE_OK ) goto finished;
-  assert_fts3_nc( pWriter || bIgnoreEmpty );
+  assert( pWriter || bIgnoreEmpty );

  if( iLevel!=FTS3_SEGCURSOR_PENDING ){
    rc = fts3DeleteSegdir(
@@ -3505,10 +3482,7 @@ static int fts3DoOptimize(Fts3Table *p, int bReturnDone){
  int rc;
  sqlite3_stmt *pAllLangid = 0;

-  rc = sqlite3Fts3PendingTermsFlush(p);
-  if( rc==SQLITE_OK ){
-    rc = fts3SqlStmt(p, SQL_SELECT_ALL_LANGID, &pAllLangid, 0);
-  }
+  rc = fts3SqlStmt(p, SQL_SELECT_ALL_LANGID, &pAllLangid, 0);
  if( rc==SQLITE_OK ){
    int rc2;
    sqlite3_bind_int(pAllLangid, 1, p->iPrevLangid);
@@ -3529,6 +3503,7 @@ static int fts3DoOptimize(Fts3Table *p, int bReturnDone){
  }

  sqlite3Fts3SegmentsClose(p);
+  sqlite3Fts3PendingTermsClear(p);

  return (rc==SQLITE_OK && bReturnDone && bSeenDone) ? SQLITE_DONE : rc;
 }
@@ -3822,14 +3797,14 @@ static int nodeReaderInit(NodeReader *p, const char *aNode, int nNode){
  p->nNode = nNode;

  /* Figure out if this is a leaf or an internal node. */
-  if( aNode && aNode[0] ){
+  if( p->aNode[0] ){
    /* An internal node. */
    p->iOff = 1 + sqlite3Fts3GetVarint(&p->aNode[1], &p->iChild);
  }else{
    p->iOff = 1;
  }

-  return aNode ? nodeReaderNext(p) : SQLITE_OK;
+  return nodeReaderNext(p);
 }

 /*
@@ -3866,7 +3841,6 @@ static int fts3IncrmergePush(
    ** be added to.  */
    nPrefix = fts3PrefixCompress(pNode->key.a, pNode->key.n, zTerm, nTerm);
    nSuffix = nTerm - nPrefix;
-    if(nSuffix<=0 ) return FTS_CORRUPT_VTAB;
    nSpace  = sqlite3Fts3VarintLen(nPrefix);
    nSpace += sqlite3Fts3VarintLen(nSuffix) + nSuffix;

@@ -3960,14 +3934,13 @@ static int fts3AppendToNode(
  /* Node must have already been started. There must be a doclist for a
  ** leaf node, and there must not be a doclist for an internal node.  */
  assert( pNode->n>0 );
-  assert_fts3_nc( (pNode->a[0]=='\0')==(aDoclist!=0) );
+  assert( (pNode->a[0]=='\0')==(aDoclist!=0) );

  blobGrowBuffer(pPrev, nTerm, &rc);
  if( rc!=SQLITE_OK ) return rc;

  nPrefix = fts3PrefixCompress(pPrev->a, pPrev->n, zTerm, nTerm);
  nSuffix = nTerm - nPrefix;
-  if( nSuffix<=0 ) return FTS_CORRUPT_VTAB;
  memcpy(pPrev->a, zTerm, nTerm);
  pPrev->n = nTerm;

@@ -4177,7 +4150,7 @@ static int fts3TermCmp(
  int nCmp = MIN(nLhs, nRhs);
  int res;

-  res = (nCmp ? memcmp(zLhs, zRhs, nCmp) : 0);
+  res = memcmp(zLhs, zRhs, nCmp);
  if( res==0 ) res = nLhs - nRhs;

  return res;
@@ -4261,10 +4234,6 @@ static int fts3IncrmergeLoad(
      pWriter->bNoLeafData = (pWriter->nLeafData==0);
      nRoot = sqlite3_column_bytes(pSelect, 4);
      aRoot = sqlite3_column_blob(pSelect, 4);
-      if( aRoot==0 ){
-        sqlite3_reset(pSelect);
-        return nRoot ? SQLITE_NOMEM : FTS_CORRUPT_VTAB;
-      }
    }else{
      return sqlite3_reset(pSelect);
    }
@@ -4300,10 +4269,6 @@ static int fts3IncrmergeLoad(
      int i;
      int nHeight = (int)aRoot[0];
      NodeWriter *pNode;
-      if( nHeight<1 || nHeight>=FTS_MAX_APPENDABLE_HEIGHT ){
-        sqlite3_reset(pSelect);
-        return FTS_CORRUPT_VTAB;
-      }

      pWriter->nLeafEst = (int)((iEnd - iStart) + 1)/FTS_MAX_APPENDABLE_HEIGHT;
      pWriter->iStart = iStart;
@@ -4317,42 +4282,34 @@ static int fts3IncrmergeLoad(

      pNode = &pWriter->aNodeWriter[nHeight];
      pNode->iBlock = pWriter->iStart + pWriter->nLeafEst*nHeight;
-      blobGrowBuffer(&pNode->block, 
-          MAX(nRoot, p->nNodeSize)+FTS3_NODE_PADDING, &rc
-      );
+      blobGrowBuffer(&pNode->block, MAX(nRoot, p->nNodeSize), &rc);
      if( rc==SQLITE_OK ){
        memcpy(pNode->block.a, aRoot, nRoot);
        pNode->block.n = nRoot;
-        memset(&pNode->block.a[nRoot], 0, FTS3_NODE_PADDING);
      }

      for(i=nHeight; i>=0 && rc==SQLITE_OK; i--){
        NodeReader reader;
        pNode = &pWriter->aNodeWriter[i];

-        if( pNode->block.a){
-          rc = nodeReaderInit(&reader, pNode->block.a, pNode->block.n);
-          while( reader.aNode && rc==SQLITE_OK ) rc = nodeReaderNext(&reader);
-          blobGrowBuffer(&pNode->key, reader.term.n, &rc);
-          if( rc==SQLITE_OK ){
-            memcpy(pNode->key.a, reader.term.a, reader.term.n);
-            pNode->key.n = reader.term.n;
-            if( i>0 ){
-              char *aBlock = 0;
-              int nBlock = 0;
-              pNode = &pWriter->aNodeWriter[i-1];
-              pNode->iBlock = reader.iChild;
-              rc = sqlite3Fts3ReadBlock(p, reader.iChild, &aBlock, &nBlock, 0);
-              blobGrowBuffer(&pNode->block, 
-                  MAX(nBlock, p->nNodeSize)+FTS3_NODE_PADDING, &rc
-              );
-              if( rc==SQLITE_OK ){
-                memcpy(pNode->block.a, aBlock, nBlock);
-                pNode->block.n = nBlock;
-                memset(&pNode->block.a[nBlock], 0, FTS3_NODE_PADDING);
-              }
-              sqlite3_free(aBlock);
+        rc = nodeReaderInit(&reader, pNode->block.a, pNode->block.n);
+        while( reader.aNode && rc==SQLITE_OK ) rc = nodeReaderNext(&reader);
+        blobGrowBuffer(&pNode->key, reader.term.n, &rc);
+        if( rc==SQLITE_OK ){
+          memcpy(pNode->key.a, reader.term.a, reader.term.n);
+          pNode->key.n = reader.term.n;
+          if( i>0 ){
+            char *aBlock = 0;
+            int nBlock = 0;
+            pNode = &pWriter->aNodeWriter[i-1];
+            pNode->iBlock = reader.iChild;
+            rc = sqlite3Fts3ReadBlock(p, reader.iChild, &aBlock, &nBlock, 0);
+            blobGrowBuffer(&pNode->block, MAX(nBlock, p->nNodeSize), &rc);
+            if( rc==SQLITE_OK ){
+              memcpy(pNode->block.a, aBlock, nBlock);
+              pNode->block.n = nBlock;
            }
+            sqlite3_free(aBlock);
          }
        }
        nodeReaderRelease(&reader);
@@ -4595,10 +4552,7 @@ static int fts3TruncateNode(
  NodeReader reader;              /* Reader object */
  Blob prev = {0, 0, 0};          /* Previous term written to new node */
  int rc = SQLITE_OK;             /* Return code */
-  int bLeaf;                       /* True for a leaf node */
-
-  if( nNode<1 ) return FTS_CORRUPT_VTAB;
-  bLeaf = aNode[0]=='\0';
+  int bLeaf = aNode[0]=='\0';     /* True for a leaf node */

  /* Allocate required output space */
  blobGrowBuffer(pNew, nNode, &rc);
@@ -4864,17 +4818,13 @@ static int fts3IncrmergeHintPop(Blob *pHint, i64 *piAbsLevel, int *pnInput){
  const int nHint = pHint->n;
  int i;

-  i = pHint->n-1;
-  if( (pHint->a[i] & 0x80) ) return FTS_CORRUPT_VTAB;
+  i = pHint->n-2;
  while( i>0 && (pHint->a[i-1] & 0x80) ) i--;
-  if( i==0 ) return FTS_CORRUPT_VTAB;
-  i--;
  while( i>0 && (pHint->a[i-1] & 0x80) ) i--;

  pHint->n = i;
  i += sqlite3Fts3GetVarint(&pHint->a[i], piAbsLevel);
  i += fts3GetVarint32(&pHint->a[i], pnInput);
-  assert( i<=nHint );
  if( i!=nHint ) return FTS_CORRUPT_VTAB;

  return SQLITE_OK;
@@ -4944,14 +4894,8 @@ int sqlite3Fts3Incrmerge(Fts3Table *p, int nMerge, int nMin){

      rc = fts3IncrmergeHintPop(&hint, &iHintAbsLevel, &nHintSeg);
      if( nSeg<0 || (iAbsLevel % nMod) >= (iHintAbsLevel % nMod) ){
-        /* Based on the scan in the block above, it is known that there
-        ** are no levels with a relative level smaller than that of
-        ** iAbsLevel with more than nSeg segments, or if nSeg is -1, 
-        ** no levels with more than nMin segments. Use this to limit the
-        ** value of nHintSeg to avoid a large memory allocation in case the 
-        ** merge-hint is corrupt*/
        iAbsLevel = iHintAbsLevel;
-        nSeg = MIN(MAX(nMin,nSeg), nHintSeg);
+        nSeg = nHintSeg;
        bUseHint = 1;
        bDirtyHint = 1;
      }else{
@@ -4964,13 +4908,7 @@ int sqlite3Fts3Incrmerge(Fts3Table *p, int nMerge, int nMin){
    /* If nSeg is less that zero, then there is no level with at least
    ** nMin segments and no hint in the %_stat table. No work to do.
    ** Exit early in this case.  */
-    if( nSeg<=0 ) break;
-
-    assert( nMod<=0x7FFFFFFF );
-    if( iAbsLevel<0 || iAbsLevel>(nMod<<32) ){
-      rc = FTS_CORRUPT_VTAB;
-      break;
-    }
+    if( nSeg<0 ) break;

    /* Open a cursor to iterate through the contents of the oldest nSeg 
    ** indexes of absolute level iAbsLevel. If this cursor is opened using 
@@ -4998,15 +4936,8 @@ int sqlite3Fts3Incrmerge(Fts3Table *p, int nMerge, int nMin){
    }
    if( SQLITE_OK==rc && pCsr->nSegment==nSeg
     && SQLITE_OK==(rc = sqlite3Fts3SegReaderStart(p, pCsr, pFilter))
+     && SQLITE_ROW==(rc = sqlite3Fts3SegReaderStep(p, pCsr))
    ){
-      int bEmpty = 0;
-      rc = sqlite3Fts3SegReaderStep(p, pCsr);
-      if( rc==SQLITE_OK ){
-        bEmpty = 1;
-      }else if( rc!=SQLITE_ROW ){
-        sqlite3Fts3SegReaderFinish(pCsr);
-        break;
-      }
      if( bUseHint && iIdx>0 ){
        const char *zKey = pCsr->zTerm;
        int nKey = pCsr->nTerm;
@@ -5017,13 +4948,11 @@ int sqlite3Fts3Incrmerge(Fts3Table *p, int nMerge, int nMin){

      if( rc==SQLITE_OK && pWriter->nLeafEst ){
        fts3LogMerge(nSeg, iAbsLevel);
-        if( bEmpty==0 ){
-          do {
-            rc = fts3IncrmergeAppend(p, pWriter, pCsr);
-            if( rc==SQLITE_OK ) rc = sqlite3Fts3SegReaderStep(p, pCsr);
-            if( pWriter->nWork>=nRem && rc==SQLITE_ROW ) rc = SQLITE_OK;
-          }while( rc==SQLITE_ROW );
-        }
+        do {
+          rc = fts3IncrmergeAppend(p, pWriter, pCsr);
+          if( rc==SQLITE_OK ) rc = sqlite3Fts3SegReaderStep(p, pCsr);
+          if( pWriter->nWork>=nRem && rc==SQLITE_ROW ) rc = SQLITE_OK;
+        }while( rc==SQLITE_ROW );

        /* Update or delete the input segments */
        if( rc==SQLITE_OK ){
@@ -5088,7 +5017,7 @@ static int fts3DoIncrmerge(
  const char *zParam              /* Nul-terminated string containing "A,B" */
 ){
  int rc;
-  int nMin = (MergeCount(p) / 2);
+  int nMin = (FTS3_MERGE_COUNT / 2);
  int nMerge = 0;
  const char *z = zParam;

@@ -5133,7 +5062,7 @@ static int fts3DoAutoincrmerge(
  int rc = SQLITE_OK;
  sqlite3_stmt *pStmt = 0;
  p->nAutoincrmerge = fts3Getint(&zParam);
-  if( p->nAutoincrmerge==1 || p->nAutoincrmerge>MergeCount(p) ){
+  if( p->nAutoincrmerge==1 || p->nAutoincrmerge>FTS3_MERGE_COUNT ){
    p->nAutoincrmerge = 8;
  }
  if( !p->bHasStat ){
@@ -5216,12 +5145,12 @@ static u64 fts3ChecksumIndex(

      i64 iDocid = 0;
      i64 iCol = 0;
-      u64 iPos = 0;
+      i64 iPos = 0;

      pCsr += sqlite3Fts3GetVarint(pCsr, &iDocid);
      while( pCsr<pEnd ){
-        u64 iVal = 0;
-        pCsr += sqlite3Fts3GetVarintU(pCsr, &iVal);
+        i64 iVal = 0;
+        pCsr += sqlite3Fts3GetVarint(pCsr, &iVal);
        if( pCsr<pEnd ){
          if( iVal==0 || iVal==1 ){
            iCol = 0;
@@ -5229,12 +5158,8 @@ static u64 fts3ChecksumIndex(
            if( iVal ){
              pCsr += sqlite3Fts3GetVarint(pCsr, &iCol);
            }else{
-              pCsr += sqlite3Fts3GetVarintU(pCsr, &iVal);
-              if( p->bDescIdx ){
-                iDocid = (i64)((u64)iDocid - iVal);
-              }else{
-                iDocid = (i64)((u64)iDocid + iVal);
-              }
+              pCsr += sqlite3Fts3GetVarint(pCsr, &iVal);
+              iDocid += iVal;
            }
          }else{
            iPos += (iVal - 2);
@@ -5307,9 +5232,10 @@ static int fts3IntegrityCheck(Fts3Table *p, int *pbOk){
      for(iCol=0; rc==SQLITE_OK && iCol<p->nColumn; iCol++){
        if( p->abNotindexed[iCol]==0 ){
          const char *zText = (const char *)sqlite3_column_text(pStmt, iCol+1);
+          int nText = sqlite3_column_bytes(pStmt, iCol+1);
          sqlite3_tokenizer_cursor *pT = 0;

-          rc = sqlite3Fts3OpenTokenizer(p->pTokenizer, iLang, zText, -1, &pT);
+          rc = sqlite3Fts3OpenTokenizer(p->pTokenizer, iLang, zText, nText,&pT);
          while( rc==SQLITE_OK ){
            char const *zToken;       /* Buffer containing token */
            int nToken = 0;           /* Number of bytes in token */
@@ -5394,7 +5320,7 @@ static int fts3DoIntegrityCheck(
 ** meaningful value to insert is the text 'optimize'.
 */
 static int fts3SpecialInsert(Fts3Table *p, sqlite3_value *pVal){
-  int rc = SQLITE_ERROR;           /* Return Code */
+  int rc;                         /* Return Code */
  const char *zVal = (const char *)sqlite3_value_text(pVal);
  int nVal = sqlite3_value_bytes(pVal);

@@ -5410,27 +5336,21 @@ static int fts3SpecialInsert(Fts3Table *p, sqlite3_value *pVal){
    rc = fts3DoIncrmerge(p, &zVal[6]);
  }else if( nVal>10 && 0==sqlite3_strnicmp(zVal, "automerge=", 10) ){
    rc = fts3DoAutoincrmerge(p, &zVal[10]);
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-  }else{
-    int v;
-    if( nVal>9 && 0==sqlite3_strnicmp(zVal, "nodesize=", 9) ){
-      v = atoi(&zVal[9]);
-      if( v>=24 && v<=p->nPgsz-35 ) p->nNodeSize = v;
-      rc = SQLITE_OK;
-    }else if( nVal>11 && 0==sqlite3_strnicmp(zVal, "maxpending=", 9) ){
-      v = atoi(&zVal[11]);
-      if( v>=64 && v<=FTS3_MAX_PENDING_DATA ) p->nMaxPendingData = v;
-      rc = SQLITE_OK;
-    }else if( nVal>21 && 0==sqlite3_strnicmp(zVal,"test-no-incr-doclist=",21) ){
-      p->bNoIncrDoclist = atoi(&zVal[21]);
-      rc = SQLITE_OK;
-    }else if( nVal>11 && 0==sqlite3_strnicmp(zVal,"mergecount=",11) ){
-      v = atoi(&zVal[11]);
-      if( v>=4 && v<=FTS3_MERGE_COUNT && (v&1)==0 ) p->nMergeCount = v;
-      rc = SQLITE_OK;
-    }
+#ifdef SQLITE_TEST
+  }else if( nVal>9 && 0==sqlite3_strnicmp(zVal, "nodesize=", 9) ){
+    p->nNodeSize = atoi(&zVal[9]);
+    rc = SQLITE_OK;
+  }else if( nVal>11 && 0==sqlite3_strnicmp(zVal, "maxpending=", 9) ){
+    p->nMaxPendingData = atoi(&zVal[11]);
+    rc = SQLITE_OK;
+  }else if( nVal>21 && 0==sqlite3_strnicmp(zVal, "test-no-incr-doclist=", 21) ){
+    p->bNoIncrDoclist = atoi(&zVal[21]);
+    rc = SQLITE_OK;
 #endif
+  }else{
+    rc = SQLITE_ERROR;
  }
+
  return rc;
 }

@@ -93,7 +93,7 @@ static int runSql(sqlite3 *db, const char *zFormat, ...){
 static void showSchema(sqlite3 *db, const char *zTab){
  sqlite3_stmt *pStmt;
  pStmt = prepare(db,
-            "SELECT sql FROM sqlite_schema"
+            "SELECT sql FROM sqlite_master"
            " WHERE name LIKE '%q%%'"
            " ORDER BY 1",
            zTab);
@@ -831,7 +831,7 @@ int main(int argc, char **argv){
    sqlite3_stmt *pStmt;
    int cnt = 0;
    pStmt = prepare(db, "SELECT b.sql"
-                        "  FROM sqlite_schema a, sqlite_schema b"
+                        "  FROM sqlite_master a, sqlite_master b"
                        " WHERE a.name GLOB '*_segdir'"
                        "   AND b.name=substr(a.name,1,length(a.name)-7)"
                        " ORDER BY 1");
@@ -159,7 +159,7 @@ struct Fts5PhraseIter {
 **
 ** xSetAuxdata(pFts5, pAux, xDelete)
 **
-**   Save the pointer passed as the second argument as the extension function's 
+**   Save the pointer passed as the second argument as the extension functions 
 **   "auxiliary data". The pointer may then be retrieved by the current or any
 **   future invocation of the same fts5 extension function made as part of
 **   the same MATCH query using the xGetAuxdata() API.
@@ -401,8 +401,8 @@ struct Fts5ExtensionApi {
 **
 **   There are several ways to approach this in FTS5:
 **
-**   <ol><li> By mapping all synonyms to a single token. In this case, using
-**            the above example, this means that the tokenizer returns the
+**   <ol><li> By mapping all synonyms to a single token. In this case, the 
+**            In the above example, this means that the tokenizer returns the
 **            same token for inputs "first" and "1st". Say that token is in
 **            fact "first", so that when the user inserts the document "I won
 **            1st place" entries are added to the index for tokens "i", "won",
@@ -61,11 +61,6 @@ typedef sqlite3_uint64 u64;
 */
 #define FTS5_MAX_PREFIX_INDEXES 31

-/*
-** Maximum segments permitted in a single index 
-*/
-#define FTS5_MAX_SEGMENT 2000
-
 #define FTS5_DEFAULT_NEARDIST 10
 #define FTS5_DEFAULT_RANK     "bm25"

@@ -183,7 +178,6 @@ struct Fts5Config {
  char *zContentExprlist;
  Fts5Tokenizer *pTok;
  fts5_tokenizer *pTokApi;
-  int bLock;                      /* True when table is preparing statement */

  /* Values loaded from the %_config table */
  int iCookie;                    /* Incremented when %_config is modified */
@@ -422,11 +416,6 @@ int sqlite3Fts5IterNextFrom(Fts5IndexIter*, i64 iMatch);
 */
 void sqlite3Fts5IterClose(Fts5IndexIter*);

-/*
-** Close the reader blob handle, if it is open.
-*/
-void sqlite3Fts5IndexCloseReader(Fts5Index*);
-
 /*
 ** This interface is used by the fts5vocab module.
 */
@@ -705,7 +694,6 @@ int sqlite3Fts5ExprEof(Fts5Expr*);
 i64 sqlite3Fts5ExprRowid(Fts5Expr*);

 void sqlite3Fts5ExprFree(Fts5Expr*);
-int sqlite3Fts5ExprAnd(Fts5Expr **pp1, Fts5Expr *p2);

 /* Called during startup to register a UDF with SQLite */
 int sqlite3Fts5ExprInit(Fts5Global*, sqlite3*);
@@ -186,11 +186,6 @@ int sqlite3Fts5PoslistNext64(
      fts5FastGetVarint32(a, i, iVal);
      iOff = ((i64)iVal) << 32;
      fts5FastGetVarint32(a, i, iVal);
-      if( iVal<2 ){
-        /* This is a corrupt record. So stop parsing it here. */
-        *piOff = -1;
-        return 1;
-      }
    }
    *piOff = iOff + ((iVal-2) & 0x7FFFFFFF);
    *pi = i;
@@ -23,7 +23,7 @@
 #define FTS5_DEFAULT_HASHSIZE    (1024*1024)

 /* Maximum allowed page size */
-#define FTS5_MAX_PAGE_SIZE (64*1024)
+#define FTS5_MAX_PAGE_SIZE (128*1024)

 static int fts5_iswhitespace(char x){
  return (x==' ');
@@ -150,7 +150,7 @@ static int fts5Dequote(char *z){
  assert( q=='[' || q=='\'' || q=='"' || q=='`' );
  if( q=='[' ) q = ']';  

-  while( z[iIn] ){
+  while( ALWAYS(z[iIn]) ){
    if( z[iIn]==q ){
      if( z[iIn+1]!=q ){
        /* Character iIn was the close quote. */
@@ -683,7 +683,7 @@ int sqlite3Fts5ConfigDeclareVtab(Fts5Config *pConfig){
    rc = sqlite3_declare_vtab(pConfig->db, zSql);
    sqlite3_free(zSql);
  }
- 
+  
  return rc;
 }

@@ -828,7 +828,7 @@ int sqlite3Fts5ConfigSetValue(
    if( SQLITE_INTEGER==sqlite3_value_numeric_type(pVal) ){
      pgsz = sqlite3_value_int(pVal);
    }
-    if( pgsz<32 || pgsz>FTS5_MAX_PAGE_SIZE ){
+    if( pgsz<=0 || pgsz>FTS5_MAX_PAGE_SIZE ){
      *pbBadkey = 1;
    }else{
      pConfig->pgsz = pgsz;
@@ -881,7 +881,6 @@ int sqlite3Fts5ConfigSetValue(
      *pbBadkey = 1;
    }else{
      if( nCrisisMerge<=1 ) nCrisisMerge = FTS5_DEFAULT_CRISISMERGE;
-      if( nCrisisMerge>=FTS5_MAX_SEGMENT ) nCrisisMerge = FTS5_MAX_SEGMENT-1;
      pConfig->nCrisisMerge = nCrisisMerge;
    }
  }
@@ -309,42 +309,6 @@ void sqlite3Fts5ExprFree(Fts5Expr *p){
  }
 }

-int sqlite3Fts5ExprAnd(Fts5Expr **pp1, Fts5Expr *p2){
-  Fts5Parse sParse;
-  memset(&sParse, 0, sizeof(sParse));
-
-  if( *pp1 ){
-    Fts5Expr *p1 = *pp1;
-    int nPhrase = p1->nPhrase + p2->nPhrase;
-
-    p1->pRoot = sqlite3Fts5ParseNode(&sParse, FTS5_AND, p1->pRoot, p2->pRoot,0);
-    p2->pRoot = 0;
-
-    if( sParse.rc==SQLITE_OK ){
-      Fts5ExprPhrase **ap = (Fts5ExprPhrase**)sqlite3_realloc(
-          p1->apExprPhrase, nPhrase * sizeof(Fts5ExprPhrase*)
-      );
-      if( ap==0 ){
-        sParse.rc = SQLITE_NOMEM;
-      }else{
-        int i;
-        memmove(&ap[p2->nPhrase], ap, p1->nPhrase*sizeof(Fts5ExprPhrase*));
-        for(i=0; i<p2->nPhrase; i++){
-          ap[i] = p2->apExprPhrase[i];
-        }
-        p1->nPhrase = nPhrase;
-        p1->apExprPhrase = ap;
-      }
-    }
-    sqlite3_free(p2->apExprPhrase);
-    sqlite3_free(p2);
-  }else{
-    *pp1 = p2;
-  }
-
-  return sParse.rc;
-}
-
 /*
 ** Argument pTerm must be a synonym iterator. Return the current rowid
 ** that it points to.
@@ -2516,12 +2480,10 @@ static void fts5ExprFunction(
  azConfig[1] = "main";
  azConfig[2] = "tbl";
  for(i=3; iArg<nArg; iArg++){
-    const char *z = (const char*)sqlite3_value_text(apVal[iArg]);
-    azConfig[i++] = (z ? z : "");
+    azConfig[i++] = (const char*)sqlite3_value_text(apVal[iArg]);
  }

  zExpr = (const char*)sqlite3_value_text(apVal[0]);
-  if( zExpr==0 ) zExpr = "";

  rc = sqlite3Fts5ConfigParse(pGlobal, db, nConfig, azConfig, &pConfig, &zErr);
  if( rc==SQLITE_OK ){
@@ -239,6 +239,11 @@
 #define FTS5_SEGMENT_ROWID(segid, pgno)       fts5_dri(segid, 0, 0, pgno)
 #define FTS5_DLIDX_ROWID(segid, height, pgno) fts5_dri(segid, 1, height, pgno)

+/*
+** Maximum segments permitted in a single index 
+*/
+#define FTS5_MAX_SEGMENT 2000
+
 #ifdef SQLITE_DEBUG
 int sqlite3Fts5Corrupt() { return SQLITE_CORRUPT_VTAB; }
 #endif
@@ -614,7 +619,7 @@ static int fts5LeafFirstTermOff(Fts5Data *pLeaf){
 /*
 ** Close the read-only blob handle, if it is open.
 */
-void sqlite3Fts5IndexCloseReader(Fts5Index *p){
+static void fts5CloseReader(Fts5Index *p){
  if( p->pReader ){
    sqlite3_blob *pReader = p->pReader;
    p->pReader = 0;
@@ -643,7 +648,7 @@ static Fts5Data *fts5DataRead(Fts5Index *p, i64 iRowid){
      assert( p->pReader==0 );
      p->pReader = pBlob;
      if( rc!=SQLITE_OK ){
-        sqlite3Fts5IndexCloseReader(p);
+        fts5CloseReader(p);
      }
      if( rc==SQLITE_ABORT ) rc = SQLITE_OK;
    }
@@ -685,7 +690,6 @@ static Fts5Data *fts5DataRead(Fts5Index *p, i64 iRowid){
      }else{
        /* TODO1: Fix this */
        pRet->p[nByte] = 0x00;
-        pRet->p[nByte+1] = 0x00;
        pRet->szLeaf = fts5GetU16(&pRet->p[2]);
      }
    }
@@ -708,7 +712,7 @@ static void fts5DataRelease(Fts5Data *pData){
 static Fts5Data *fts5LeafRead(Fts5Index *p, i64 iRowid){
  Fts5Data *pRet = fts5DataRead(p, iRowid);
  if( pRet ){
-    if( pRet->nn<4 || pRet->szLeaf>pRet->nn ){
+    if( pRet->szLeaf>pRet->nn ){
      p->rc = FTS5_CORRUPT;
      fts5DataRelease(pRet);
      pRet = 0;
@@ -988,7 +992,7 @@ static Fts5Structure *fts5StructureReadUncached(Fts5Index *p){
    /* TODO: Do we need this if the leaf-index is appended? Probably... */
    memset(&pData->p[pData->nn], 0, FTS5_DATA_PADDING);
    p->rc = fts5StructureDecode(pData->p, pData->nn, &iCookie, &pRet);
-    if( p->rc==SQLITE_OK && (pConfig->pgsz==0 || pConfig->iCookie!=iCookie) ){
+    if( p->rc==SQLITE_OK && pConfig->iCookie!=iCookie ){
      p->rc = sqlite3Fts5ConfigLoad(pConfig, iCookie);
    }
    fts5DataRelease(pData);
@@ -2321,11 +2325,11 @@ static void fts5LeafSeek(
  }

 search_success:
-  if( (i64)iOff+nNew>n || nNew<1 ){
+  pIter->iLeafOffset = iOff + nNew;
+  if( pIter->iLeafOffset>n || nNew<1 ){
    p->rc = FTS5_CORRUPT;
    return;
  }
-  pIter->iLeafOffset = iOff + nNew;
  pIter->iTermLeafOffset = pIter->iLeafOffset;
  pIter->iTermLeafPgno = pIter->iLeafPgno;

@@ -4949,14 +4953,8 @@ static void fts5MergePrefixLists(
    ** first rowid in one input is a large negative number, and the first in
    ** the other a non-negative number, the delta for the non-negative
    ** number will be larger on disk than the literal integer value
-    ** was.  
-    **
-    ** Or, if the input position-lists are corrupt, then the output might
-    ** include up to 2 extra 10-byte positions created by interpreting -1
-    ** (the value PoslistNext64() uses for EOF) as a position and appending
-    ** it to the output. This can happen at most once for each input 
-    ** position-list, hence two 10 byte paddings.  */
-    if( sqlite3Fts5BufferSize(&p->rc, &out, p1->n + p2->n + 9+10+10) ) return;
+    ** was.  */
+    if( sqlite3Fts5BufferSize(&p->rc, &out, p1->n + p2->n + 9) ) return;
    fts5DoclistIterInit(p1, &i1);
    fts5DoclistIterInit(p2, &i2);

@@ -4967,7 +4965,6 @@ static void fts5MergePrefixLists(
        fts5BufferSafeAppendBlob(&out, i1.aPoslist, i1.nPoslist+i1.nSize);
        fts5DoclistIterNext(&i1);
        if( i1.aPoslist==0 ) break;
-        assert( out.n<=((i1.aPoslist-p1->p) + (i2.aPoslist-p2->p)+9+10+10) );
      }
      else if( i2.iRowid!=i1.iRowid ){
        /* Copy entry from i2 */
@@ -4975,7 +4972,6 @@ static void fts5MergePrefixLists(
        fts5BufferSafeAppendBlob(&out, i2.aPoslist, i2.nPoslist+i2.nSize);
        fts5DoclistIterNext(&i2);
        if( i2.aPoslist==0 ) break;
-        assert( out.n<=((i1.aPoslist-p1->p) + (i2.aPoslist-p2->p)+9+10+10) );
      }
      else{
        /* Merge the two position lists. */ 
@@ -4992,17 +4988,14 @@ static void fts5MergePrefixLists(
        Fts5PoslistWriter writer;
        memset(&writer, 0, sizeof(writer));

-        /* See the earlier comment in this function for an explanation of why
-        ** corrupt input position lists might cause the output to consume
-        ** at most 20 bytes of unexpected space. */
        fts5MergeAppendDocid(&out, iLastRowid, i2.iRowid);
        fts5BufferZero(&tmp);
-        sqlite3Fts5BufferSize(&p->rc, &tmp, i1.nPoslist + i2.nPoslist + 10 + 10);
+        sqlite3Fts5BufferSize(&p->rc, &tmp, i1.nPoslist + i2.nPoslist);
        if( p->rc ) break;

        sqlite3Fts5PoslistNext64(a1, i1.nPoslist, &iOff1, &iPos1);
        sqlite3Fts5PoslistNext64(a2, i2.nPoslist, &iOff2, &iPos2);
-        assert_nc( iPos1>=0 && iPos2>=0 );
+        assert( iPos1>=0 && iPos2>=0 );

        if( iPos1<iPos2 ){
          sqlite3Fts5PoslistSafeAppend(&tmp, &iPrev, iPos1);
@@ -5011,6 +5004,7 @@ static void fts5MergePrefixLists(
          sqlite3Fts5PoslistSafeAppend(&tmp, &iPrev, iPos2);
          sqlite3Fts5PoslistNext64(a2, i2.nPoslist, &iOff2, &iPos2);
        }
+
        if( iPos1>=0 && iPos2>=0 ){
          while( 1 ){
            if( iPos1<iPos2 ){
@@ -5035,7 +5029,7 @@ static void fts5MergePrefixLists(
          aCopy = &a1[iOff1];
          nCopy = i1.nPoslist - iOff1;
        }else{
-          assert_nc( iPos2>=0 && iPos2!=iPrev );
+          assert( iPos2>=0 && iPos2!=iPrev );
          sqlite3Fts5PoslistSafeAppend(&tmp, &iPrev, iPos2);
          aCopy = &a2[iOff2];
          nCopy = i2.nPoslist - iOff2;
@@ -5045,19 +5039,12 @@ static void fts5MergePrefixLists(
        }

        /* WRITEPOSLISTSIZE */
-        assert_nc( tmp.n<=i1.nPoslist+i2.nPoslist );
-        assert( tmp.n<=i1.nPoslist+i2.nPoslist+10+10 );
-        if( tmp.n>i1.nPoslist+i2.nPoslist ){
-          if( p->rc==SQLITE_OK ) p->rc = FTS5_CORRUPT;
-          break;
-        }
        fts5BufferSafeAppendVarint(&out, tmp.n * 2);
        fts5BufferSafeAppendBlob(&out, tmp.p, tmp.n);
        fts5DoclistIterNext(&i1);
        fts5DoclistIterNext(&i2);
-        assert_nc( out.n<=(p1->n+p2->n+9) );
+        assert( out.n<=(p1->n+p2->n+9) );
        if( i1.aPoslist==0 || i2.aPoslist==0 ) break;
-        assert( out.n<=((i1.aPoslist-p1->p) + (i2.aPoslist-p2->p)+9+10+10) );
      }
    }

@@ -5069,7 +5056,7 @@ static void fts5MergePrefixLists(
      fts5MergeAppendDocid(&out, iLastRowid, i2.iRowid);
      fts5BufferSafeAppendBlob(&out, i2.aPoslist, i2.aEof - i2.aPoslist);
    }
-    assert_nc( out.n<=(p1->n+p2->n+9) );
+    assert( out.n<=(p1->n+p2->n+9) );

    fts5BufferSet(&p->rc, p1, out.n, out.p);
    fts5BufferFree(&tmp);
@@ -5204,7 +5191,7 @@ int sqlite3Fts5IndexBeginWrite(Fts5Index *p, int bDelete, i64 iRowid){
 int sqlite3Fts5IndexSync(Fts5Index *p){
  assert( p->rc==SQLITE_OK );
  fts5IndexFlush(p);
-  sqlite3Fts5IndexCloseReader(p);
+  fts5CloseReader(p);
  return fts5IndexReturn(p);
 }

@@ -5215,7 +5202,7 @@ int sqlite3Fts5IndexSync(Fts5Index *p){
 ** records must be invalidated.
 */
 int sqlite3Fts5IndexRollback(Fts5Index *p){
-  sqlite3Fts5IndexCloseReader(p);
+  fts5CloseReader(p);
  fts5IndexDiscardData(p);
  fts5StructureInvalidate(p);
  /* assert( p->rc==SQLITE_OK ); */
@@ -5230,7 +5217,6 @@ int sqlite3Fts5IndexRollback(Fts5Index *p){
 int sqlite3Fts5IndexReinit(Fts5Index *p){
  Fts5Structure s;
  fts5StructureInvalidate(p);
-  fts5IndexDiscardData(p);
  memset(&s, 0, sizeof(Fts5Structure));
  fts5DataWrite(p, FTS5_AVERAGES_ROWID, (const u8*)"", 0);
  fts5StructureWrite(p, &s);
@@ -5318,13 +5304,9 @@ int sqlite3Fts5IndexCharlenToBytelen(
  for(i=0; i<nChar; i++){
    if( n>=nByte ) return 0;      /* Input contains fewer than nChar chars */
    if( (unsigned char)p[n++]>=0xc0 ){
-      if( n>=nByte ) return 0;
      while( (p[n] & 0xc0)==0x80 ){
        n++;
-        if( n>=nByte ){
-          if( i+1==nChar ) break;
-          return 0;
-        }
+        if( n>=nByte ) break;
      }
    }
  }
@@ -5460,7 +5442,7 @@ int sqlite3Fts5IndexQuery(
    if( p->rc ){
      sqlite3Fts5IterClose((Fts5IndexIter*)pRet);
      pRet = 0;
-      sqlite3Fts5IndexCloseReader(p);
+      fts5CloseReader(p);
    }

    *ppIter = (Fts5IndexIter*)pRet;
@@ -5533,7 +5515,7 @@ void sqlite3Fts5IterClose(Fts5IndexIter *pIndexIter){
    Fts5Iter *pIter = (Fts5Iter*)pIndexIter;
    Fts5Index *pIndex = pIter->pIndex;
    fts5MultiIterFree(pIter);
-    sqlite3Fts5IndexCloseReader(pIndex);
+    fts5CloseReader(pIndex);
  }
 }

@@ -5726,37 +5708,6 @@ static int fts5QueryCksum(
  return rc;
 }

-/*
-** Check if buffer z[], size n bytes, contains as series of valid utf-8
-** encoded codepoints. If so, return 0. Otherwise, if the buffer does not
-** contain valid utf-8, return non-zero.
-*/
-static int fts5TestUtf8(const char *z, int n){
-  int i = 0;
-  assert_nc( n>0 );
-  while( i<n ){
-    if( (z[i] & 0x80)==0x00 ){
-      i++;
-    }else
-    if( (z[i] & 0xE0)==0xC0 ){
-      if( i+1>=n || (z[i+1] & 0xC0)!=0x80 ) return 1;
-      i += 2;
-    }else
-    if( (z[i] & 0xF0)==0xE0 ){
-      if( i+2>=n || (z[i+1] & 0xC0)!=0x80 || (z[i+2] & 0xC0)!=0x80 ) return 1;
-      i += 3;
-    }else
-    if( (z[i] & 0xF8)==0xF0 ){
-      if( i+3>=n || (z[i+1] & 0xC0)!=0x80 || (z[i+2] & 0xC0)!=0x80 ) return 1;
-      if( (z[i+2] & 0xC0)!=0x80 ) return 1;
-      i += 3;
-    }else{
-      return 1;
-    }
-  }
-
-  return 0;
-}

 /*
 ** This function is also purely an internal test. It does not contribute to 
@@ -5797,14 +5748,8 @@ static void fts5TestTerm(
    ** This check may only be performed if the hash table is empty. This
    ** is because the hash table only supports a single scan query at
    ** a time, and the multi-iter loop from which this function is called
-    ** is already performing such a scan. 
-    **
-    ** Also only do this if buffer zTerm contains nTerm bytes of valid
-    ** utf-8. Otherwise, the last part of the buffer contents might contain
-    ** a non-utf-8 sequence that happens to be a prefix of a valid utf-8
-    ** character stored in the main fts index, which will cause the
-    ** test to fail.  */
-    if( p->nPendingData==0 && 0==fts5TestUtf8(zTerm, nTerm) ){
+    ** is already performing such a scan. */
+    if( p->nPendingData==0 ){
      if( iIdx>0 && rc==SQLITE_OK ){
        int f = flags|FTS5INDEX_QUERY_TEST_NOIDX;
        ck2 = 0;
@@ -5927,8 +5872,7 @@ static void fts5IndexIntegrityCheckSegment(
  if( pSeg->pgnoFirst==0 ) return;

  fts5IndexPrepareStmt(p, &pStmt, sqlite3_mprintf(
-      "SELECT segid, term, (pgno>>1), (pgno&1) FROM %Q.'%q_idx' WHERE segid=%d "
-      "ORDER BY 1, 2",
+      "SELECT segid, term, (pgno>>1), (pgno&1) FROM %Q.'%q_idx' WHERE segid=%d",
      pConfig->zDb, pConfig->zName, pSeg->iSegid
  ));

@@ -5937,8 +5881,8 @@ static void fts5IndexIntegrityCheckSegment(
    i64 iRow;                     /* Rowid for this leaf */
    Fts5Data *pLeaf;              /* Data for this leaf */

-    const char *zIdxTerm = (const char*)sqlite3_column_blob(pStmt, 1);
    int nIdxTerm = sqlite3_column_bytes(pStmt, 1);
+    const char *zIdxTerm = (const char*)sqlite3_column_text(pStmt, 1);
    int iIdxLeaf = sqlite3_column_int(pStmt, 2);
    int bIdxDlidx = sqlite3_column_int(pStmt, 3);

@@ -289,10 +289,7 @@ static void fts5CheckTransactionState(Fts5FullTable *p, int op, int iSavepoint){
    case FTS5_ROLLBACKTO:
      assert( p->ts.eState==1 );
      assert( iSavepoint>=-1 );
-      /* The following assert() can fail if another vtab strikes an error
-      ** within an xSavepoint() call then SQLite calls xRollbackTo() - without
-      ** having called xSavepoint() on this vtab.  */
-      /* assert( iSavepoint<=p->ts.iSavepoint ); */
+      assert( iSavepoint<=p->ts.iSavepoint );
      p->ts.iSavepoint = iSavepoint;
      break;
  }
@@ -468,39 +465,17 @@ static void fts5SetUniqueFlag(sqlite3_index_info *pIdxInfo){
 ** Implementation of the xBestIndex method for FTS5 tables. Within the 
 ** WHERE constraint, it searches for the following:
 **
-**   1. A MATCH constraint against the table column.
+**   1. A MATCH constraint against the special column.
 **   2. A MATCH constraint against the "rank" column.
-**   3. A MATCH constraint against some other column.
-**   4. An == constraint against the rowid column.
-**   5. A < or <= constraint against the rowid column.
-**   6. A > or >= constraint against the rowid column.
+**   3. An == constraint against the rowid column.
+**   4. A < or <= constraint against the rowid column.
+**   5. A > or >= constraint against the rowid column.
 **
-** Within the ORDER BY, the following are supported:
+** Within the ORDER BY, either:
 **
 **   5. ORDER BY rank [ASC|DESC]
 **   6. ORDER BY rowid [ASC|DESC]
 **
-** Information for the xFilter call is passed via both the idxNum and 
-** idxStr variables. Specifically, idxNum is a bitmask of the following
-** flags used to encode the ORDER BY clause:
-**
-**     FTS5_BI_ORDER_RANK
-**     FTS5_BI_ORDER_ROWID
-**     FTS5_BI_ORDER_DESC
-**
-** idxStr is used to encode data from the WHERE clause. For each argument
-** passed to the xFilter method, the following is appended to idxStr:
-**
-**   Match against table column:            "m"
-**   Match against rank column:             "r"
-**   Match against other column:            "<column-number>"
-**   Equality constraint against the rowid: "="
-**   A < or <= against the rowid:           "<"
-**   A > or >= against the rowid:           ">"
-**
-** This function ensures that there is at most one "r" or "=". And that if
-** there exists an "=" then there is no "<" or ">".
-**
 ** Costs are assigned as follows:
 **
 **  a) If an unusable MATCH operator is present in the WHERE clause, the
@@ -528,18 +503,32 @@ static int fts5BestIndexMethod(sqlite3_vtab *pVTab, sqlite3_index_info *pInfo){
  Fts5Config *pConfig = pTab->pConfig;
  const int nCol = pConfig->nCol;
  int idxFlags = 0;               /* Parameter passed through to xFilter() */
+  int bHasMatch;
+  int iNext;
  int i;

-  char *idxStr;
-  int iIdxStr = 0;
-  int iCons = 0;
-
-  int bSeenEq = 0;
-  int bSeenGt = 0;
-  int bSeenLt = 0;
-  int bSeenMatch = 0;
-  int bSeenRank = 0;
+  struct Constraint {
+    int op;                       /* Mask against sqlite3_index_constraint.op */
+    int fts5op;                   /* FTS5 mask for idxFlags */
+    int iCol;                     /* 0==rowid, 1==tbl, 2==rank */
+    int omit;                     /* True to omit this if found */
+    int iConsIndex;               /* Index in pInfo->aConstraint[] */
+  } aConstraint[] = {
+    {SQLITE_INDEX_CONSTRAINT_MATCH|SQLITE_INDEX_CONSTRAINT_EQ, 
+                                    FTS5_BI_MATCH,    1, 1, -1},
+    {SQLITE_INDEX_CONSTRAINT_MATCH|SQLITE_INDEX_CONSTRAINT_EQ, 
+                                    FTS5_BI_RANK,     2, 1, -1},
+    {SQLITE_INDEX_CONSTRAINT_EQ,    FTS5_BI_ROWID_EQ, 0, 0, -1},
+    {SQLITE_INDEX_CONSTRAINT_LT|SQLITE_INDEX_CONSTRAINT_LE, 
+                                    FTS5_BI_ROWID_LE, 0, 0, -1},
+    {SQLITE_INDEX_CONSTRAINT_GT|SQLITE_INDEX_CONSTRAINT_GE, 
+                                    FTS5_BI_ROWID_GE, 0, 0, -1},
+  };

+  int aColMap[3];
+  aColMap[0] = -1;
+  aColMap[1] = nCol;
+  aColMap[2] = nCol+1;

  assert( SQLITE_INDEX_CONSTRAINT_EQ<SQLITE_INDEX_CONSTRAINT_MATCH );
  assert( SQLITE_INDEX_CONSTRAINT_GT<SQLITE_INDEX_CONSTRAINT_MATCH );
@@ -547,85 +536,40 @@ static int fts5BestIndexMethod(sqlite3_vtab *pVTab, sqlite3_index_info *pInfo){
  assert( SQLITE_INDEX_CONSTRAINT_GE<SQLITE_INDEX_CONSTRAINT_MATCH );
  assert( SQLITE_INDEX_CONSTRAINT_LE<SQLITE_INDEX_CONSTRAINT_MATCH );

-  if( pConfig->bLock ){
-    pTab->base.zErrMsg = sqlite3_mprintf(
-        "recursively defined fts5 content table"
-    );
-    return SQLITE_ERROR;
-  }
-
-  idxStr = (char*)sqlite3_malloc(pInfo->nConstraint * 6 + 1);
-  if( idxStr==0 ) return SQLITE_NOMEM;
-  pInfo->idxStr = idxStr;
-  pInfo->needToFreeIdxStr = 1;
-
+  /* Set idxFlags flags for all WHERE clause terms that will be used. */
  for(i=0; i<pInfo->nConstraint; i++){
    struct sqlite3_index_constraint *p = &pInfo->aConstraint[i];
    int iCol = p->iColumn;
-    if( p->op==SQLITE_INDEX_CONSTRAINT_MATCH
-     || (p->op==SQLITE_INDEX_CONSTRAINT_EQ && iCol>=nCol)
+
+    if( (p->op==SQLITE_INDEX_CONSTRAINT_MATCH && iCol>=0 && iCol<=nCol)
+     || (p->op==SQLITE_INDEX_CONSTRAINT_EQ && iCol==nCol)
    ){
      /* A MATCH operator or equivalent */
-      if( p->usable==0 || iCol<0 ){
+      if( p->usable ){
+        idxFlags = (idxFlags & 0xFFFF) | FTS5_BI_MATCH | (iCol << 16);
+        aConstraint[0].iConsIndex = i;
+      }else{
        /* As there exists an unusable MATCH constraint this is an 
        ** unusable plan. Set a prohibitively high cost. */
        pInfo->estimatedCost = 1e50;
-        assert( iIdxStr < pInfo->nConstraint*6 + 1 );
-        idxStr[iIdxStr] = 0;
        return SQLITE_OK;
-      }else{
-        if( iCol==nCol+1 ){
-          if( bSeenRank ) continue;
-          idxStr[iIdxStr++] = 'r';
-          bSeenRank = 1;
-        }else{
-          bSeenMatch = 1;
-          idxStr[iIdxStr++] = 'm';
-          if( iCol<nCol ){
-            sqlite3_snprintf(6, &idxStr[iIdxStr], "%d", iCol);
-            idxStr += strlen(&idxStr[iIdxStr]);
-            assert( idxStr[iIdxStr]=='\0' );
-          }
-        }
-        pInfo->aConstraintUsage[i].argvIndex = ++iCons;
-        pInfo->aConstraintUsage[i].omit = 1;
      }
-    }
-    else if( p->usable && bSeenEq==0 
-      && p->op==SQLITE_INDEX_CONSTRAINT_EQ && iCol<0 
-    ){
-      idxStr[iIdxStr++] = '=';
-      bSeenEq = 1;
-      pInfo->aConstraintUsage[i].argvIndex = ++iCons;
-    }
-  }
-
-  if( bSeenEq==0 ){
-    for(i=0; i<pInfo->nConstraint; i++){
-      struct sqlite3_index_constraint *p = &pInfo->aConstraint[i];
-      if( p->iColumn<0 && p->usable ){
-        int op = p->op;
-        if( op==SQLITE_INDEX_CONSTRAINT_LT || op==SQLITE_INDEX_CONSTRAINT_LE ){
-          if( bSeenLt ) continue;
-          idxStr[iIdxStr++] = '<';
-          pInfo->aConstraintUsage[i].argvIndex = ++iCons;
-          bSeenLt = 1;
-        }else
-        if( op==SQLITE_INDEX_CONSTRAINT_GT || op==SQLITE_INDEX_CONSTRAINT_GE ){
-          if( bSeenGt ) continue;
-          idxStr[iIdxStr++] = '>';
-          pInfo->aConstraintUsage[i].argvIndex = ++iCons;
-          bSeenGt = 1;
+    }else if( p->op<=SQLITE_INDEX_CONSTRAINT_MATCH ){
+      int j;
+      for(j=1; j<ArraySize(aConstraint); j++){
+        struct Constraint *pC = &aConstraint[j];
+        if( iCol==aColMap[pC->iCol] && (p->op & pC->op) && p->usable ){
+          pC->iConsIndex = i;
+          idxFlags |= pC->fts5op;
        }
      }
    }
  }
-  idxStr[iIdxStr] = '\0';

  /* Set idxFlags flags for the ORDER BY clause */
  if( pInfo->nOrderBy==1 ){
    int iSort = pInfo->aOrderBy[0].iColumn;
-    if( iSort==(pConfig->nCol+1) && bSeenMatch ){
+    if( iSort==(pConfig->nCol+1) && BitFlagTest(idxFlags, FTS5_BI_MATCH) ){
      idxFlags |= FTS5_BI_ORDER_RANK;
    }else if( iSort==-1 ){
      idxFlags |= FTS5_BI_ORDER_ROWID;
@@ -639,15 +583,26 @@ static int fts5BestIndexMethod(sqlite3_vtab *pVTab, sqlite3_index_info *pInfo){
  }

  /* Calculate the estimated cost based on the flags set in idxFlags. */
-  if( bSeenEq ){
-    pInfo->estimatedCost = bSeenMatch ? 100.0 : 10.0;
-    if( bSeenMatch==0 ) fts5SetUniqueFlag(pInfo);
-  }else if( bSeenLt && bSeenGt ){
-    pInfo->estimatedCost = bSeenMatch ? 500.0 : 250000.0;
-  }else if( bSeenLt || bSeenGt ){
-    pInfo->estimatedCost = bSeenMatch ? 750.0 : 750000.0;
+  bHasMatch = BitFlagTest(idxFlags, FTS5_BI_MATCH);
+  if( BitFlagTest(idxFlags, FTS5_BI_ROWID_EQ) ){
+    pInfo->estimatedCost = bHasMatch ? 100.0 : 10.0;
+    if( bHasMatch==0 ) fts5SetUniqueFlag(pInfo);
+  }else if( BitFlagAllTest(idxFlags, FTS5_BI_ROWID_LE|FTS5_BI_ROWID_GE) ){
+    pInfo->estimatedCost = bHasMatch ? 500.0 : 250000.0;
+  }else if( BitFlagTest(idxFlags, FTS5_BI_ROWID_LE|FTS5_BI_ROWID_GE) ){
+    pInfo->estimatedCost = bHasMatch ? 750.0 : 750000.0;
  }else{
-    pInfo->estimatedCost = bSeenMatch ? 1000.0 : 1000000.0;
+    pInfo->estimatedCost = bHasMatch ? 1000.0 : 1000000.0;
+  }
+
+  /* Assign argvIndex values to each constraint in use. */
+  iNext = 1;
+  for(i=0; i<ArraySize(aConstraint); i++){
+    struct Constraint *pC = &aConstraint[i];
+    if( pC->iConsIndex>=0 ){
+      pInfo->aConstraintUsage[pC->iConsIndex].argvIndex = iNext++;
+      pInfo->aConstraintUsage[pC->iConsIndex].omit = (unsigned char)pC->omit;
+    }
  }

  pInfo->idxNum = idxFlags;
@@ -747,7 +702,6 @@ static void fts5FreeCursorComponents(Fts5Cursor *pCsr){
    sqlite3_free(pCsr->zRankArgs);
  }

-  sqlite3Fts5IndexCloseReader(pTab->p.pIndex);
  memset(&pCsr->ePlan, 0, sizeof(Fts5Cursor) - ((u8*)&pCsr->ePlan - (u8*)pCsr));
 }

@@ -898,24 +852,15 @@ static int fts5NextMethod(sqlite3_vtab_cursor *pCursor){
        break;
      }
  
-      default: {
-        Fts5Config *pConfig = ((Fts5Table*)pCursor->pVtab)->pConfig;
-        pConfig->bLock++;
+      default:
        rc = sqlite3_step(pCsr->pStmt);
-        pConfig->bLock--;
        if( rc!=SQLITE_ROW ){
          CsrFlagSet(pCsr, FTS5CSR_EOF);
          rc = sqlite3_reset(pCsr->pStmt);
-          if( rc!=SQLITE_OK ){
-            pCursor->pVtab->zErrMsg = sqlite3_mprintf(
-                "%s", sqlite3_errmsg(pConfig->db)
-            );
-          }
        }else{
          rc = SQLITE_OK;
        }
        break;
-      }
    }
  }
  
@@ -980,7 +925,7 @@ static int fts5CursorFirstSorted(
  **
  ** If SQLite a built-in statement cache, this wouldn't be a problem. */
  rc = fts5PrepareStatement(&pSorter->pStmt, pConfig,
-      "SELECT rowid, rank FROM %Q.%Q ORDER BY %s(\"%w\"%s%s) %s",
+      "SELECT rowid, rank FROM %Q.%Q ORDER BY %s(%s%s%s) %s",
      pConfig->zDb, pConfig->zName, zRank, pConfig->zName,
      (zRankArgs ? ", " : ""),
      (zRankArgs ? zRankArgs : ""),
@@ -1036,10 +981,10 @@ static int fts5SpecialMatch(
  assert( pTab->p.base.zErrMsg==0 );
  pCsr->ePlan = FTS5_PLAN_SPECIAL;

-  if( n==5 && 0==sqlite3_strnicmp("reads", z, n) ){
+  if( 0==sqlite3_strnicmp("reads", z, n) ){
    pCsr->iSpecial = sqlite3Fts5IndexReads(pTab->p.pIndex);
  }
-  else if( n==2 && 0==sqlite3_strnicmp("id", z, n) ){
+  else if( 0==sqlite3_strnicmp("id", z, n) ){
    pCsr->iSpecial = pCsr->iCsrId;
  }
  else{
@@ -1180,7 +1125,7 @@ static i64 fts5GetRowidLimit(sqlite3_value *pVal, i64 iDefault){
 static int fts5FilterMethod(
  sqlite3_vtab_cursor *pCursor,   /* The cursor used for this query */
  int idxNum,                     /* Strategy index */
-  const char *idxStr,             /* Unused */
+  const char *zUnused,            /* Unused */
  int nVal,                       /* Number of elements in apVal */
  sqlite3_value **apVal           /* Arguments for the indexing scheme */
 ){
@@ -1188,24 +1133,19 @@ static int fts5FilterMethod(
  Fts5Config *pConfig = pTab->p.pConfig;
  Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
  int rc = SQLITE_OK;             /* Error code */
+  int iVal = 0;                   /* Counter for apVal[] */
  int bDesc;                      /* True if ORDER BY [rank|rowid] DESC */
  int bOrderByRank;               /* True if ORDER BY rank */
+  sqlite3_value *pMatch = 0;      /* <tbl> MATCH ? expression (or NULL) */
  sqlite3_value *pRank = 0;       /* rank MATCH ? expression (or NULL) */
  sqlite3_value *pRowidEq = 0;    /* rowid = ? expression (or NULL) */
  sqlite3_value *pRowidLe = 0;    /* rowid <= ? expression (or NULL) */
  sqlite3_value *pRowidGe = 0;    /* rowid >= ? expression (or NULL) */
  int iCol;                       /* Column on LHS of MATCH operator */
  char **pzErrmsg = pConfig->pzErrmsg;
-  int i;
-  int iIdxStr = 0;
-  Fts5Expr *pExpr = 0;

-  if( pConfig->bLock ){
-    pTab->p.base.zErrMsg = sqlite3_mprintf(
-        "recursively defined fts5 content table"
-    );
-    return SQLITE_ERROR;
-  }
+  UNUSED_PARAM(zUnused);
+  UNUSED_PARAM(nVal);

  if( pCsr->ePlan ){
    fts5FreeCursorComponents(pCsr);
@@ -1218,60 +1158,23 @@ static int fts5FilterMethod(
  assert( pCsr->pRank==0 );
  assert( pCsr->zRank==0 );
  assert( pCsr->zRankArgs==0 );
-  assert( pTab->pSortCsr==0 || nVal==0 );

  assert( pzErrmsg==0 || pzErrmsg==&pTab->p.base.zErrMsg );
  pConfig->pzErrmsg = &pTab->p.base.zErrMsg;

-  /* Decode the arguments passed through to this function. */
-  for(i=0; i<nVal; i++){
-    switch( idxStr[iIdxStr++] ){
-      case 'r':
-        pRank = apVal[i];
-        break;
-      case 'm': {
-        const char *zText = (const char*)sqlite3_value_text(apVal[i]);
-        if( zText==0 ) zText = "";
-
-        if( idxStr[iIdxStr]>='0' && idxStr[iIdxStr]<='9' ){
-          iCol = 0;
-          do{
-            iCol = iCol*10 + (idxStr[iIdxStr]-'0');
-            iIdxStr++;
-          }while( idxStr[iIdxStr]>='0' && idxStr[iIdxStr]<='9' );
-        }else{
-          iCol = pConfig->nCol;
-        }
-
-        if( zText[0]=='*' ){
-          /* The user has issued a query of the form "MATCH '*...'". This
-          ** indicates that the MATCH expression is not a full text query,
-          ** but a request for an internal parameter.  */
-          rc = fts5SpecialMatch(pTab, pCsr, &zText[1]);
-          goto filter_out;
-        }else{
-          char **pzErr = &pTab->p.base.zErrMsg;
-          rc = sqlite3Fts5ExprNew(pConfig, iCol, zText, &pExpr, pzErr);
-          if( rc==SQLITE_OK ){
-            rc = sqlite3Fts5ExprAnd(&pCsr->pExpr, pExpr);
-            pExpr = 0;
-          }
-          if( rc!=SQLITE_OK ) goto filter_out;
-        }
-
-        break;
-      }
-      case '=':
-        pRowidEq = apVal[i];
-        break;
-      case '<':
-        pRowidLe = apVal[i];
-        break;
-      default: assert( idxStr[iIdxStr-1]=='>' );
-        pRowidGe = apVal[i];
-        break;
-    }
-  }
+  /* Decode the arguments passed through to this function.
+  **
+  ** Note: The following set of if(...) statements must be in the same
+  ** order as the corresponding entries in the struct at the top of
+  ** fts5BestIndexMethod().  */
+  if( BitFlagTest(idxNum, FTS5_BI_MATCH) ) pMatch = apVal[iVal++];
+  if( BitFlagTest(idxNum, FTS5_BI_RANK) ) pRank = apVal[iVal++];
+  if( BitFlagTest(idxNum, FTS5_BI_ROWID_EQ) ) pRowidEq = apVal[iVal++];
+  if( BitFlagTest(idxNum, FTS5_BI_ROWID_LE) ) pRowidLe = apVal[iVal++];
+  if( BitFlagTest(idxNum, FTS5_BI_ROWID_GE) ) pRowidGe = apVal[iVal++];
+  iCol = (idxNum>>16);
+  assert( iCol>=0 && iCol<=pConfig->nCol );
+  assert( iVal==nVal );
  bOrderByRank = ((idxNum & FTS5_BI_ORDER_RANK) ? 1 : 0);
  pCsr->bDesc = bDesc = ((idxNum & FTS5_BI_ORDER_DESC) ? 1 : 0);

@@ -1298,7 +1201,7 @@ static int fts5FilterMethod(
    ** (pCursor) is used to execute the query issued by function 
    ** fts5CursorFirstSorted() above.  */
    assert( pRowidEq==0 && pRowidLe==0 && pRowidGe==0 && pRank==0 );
-    assert( nVal==0 && bOrderByRank==0 && bDesc==0 );
+    assert( nVal==0 && pMatch==0 && bOrderByRank==0 && bDesc==0 );
    assert( pCsr->iLastRowid==LARGEST_INT64 );
    assert( pCsr->iFirstRowid==SMALLEST_INT64 );
    if( pTab->pSortCsr->bDesc ){
@@ -1311,15 +1214,29 @@ static int fts5FilterMethod(
    pCsr->ePlan = FTS5_PLAN_SOURCE;
    pCsr->pExpr = pTab->pSortCsr->pExpr;
    rc = fts5CursorFirst(pTab, pCsr, bDesc);
-  }else if( pCsr->pExpr ){
+  }else if( pMatch ){
+    const char *zExpr = (const char*)sqlite3_value_text(apVal[0]);
+    if( zExpr==0 ) zExpr = "";
+
    rc = fts5CursorParseRank(pConfig, pCsr, pRank);
    if( rc==SQLITE_OK ){
-      if( bOrderByRank ){
-        pCsr->ePlan = FTS5_PLAN_SORTED_MATCH;
-        rc = fts5CursorFirstSorted(pTab, pCsr, bDesc);
+      if( zExpr[0]=='*' ){
+        /* The user has issued a query of the form "MATCH '*...'". This
+        ** indicates that the MATCH expression is not a full text query,
+        ** but a request for an internal parameter.  */
+        rc = fts5SpecialMatch(pTab, pCsr, &zExpr[1]);
      }else{
-        pCsr->ePlan = FTS5_PLAN_MATCH;
-        rc = fts5CursorFirst(pTab, pCsr, bDesc);
+        char **pzErr = &pTab->p.base.zErrMsg;
+        rc = sqlite3Fts5ExprNew(pConfig, iCol, zExpr, &pCsr->pExpr, pzErr);
+        if( rc==SQLITE_OK ){
+          if( bOrderByRank ){
+            pCsr->ePlan = FTS5_PLAN_SORTED_MATCH;
+            rc = fts5CursorFirstSorted(pTab, pCsr, bDesc);
+          }else{
+            pCsr->ePlan = FTS5_PLAN_MATCH;
+            rc = fts5CursorFirst(pTab, pCsr, bDesc);
+          }
+        }
      }
    }
  }else if( pConfig->zContent==0 ){
@@ -1336,7 +1253,7 @@ static int fts5FilterMethod(
    );
    if( rc==SQLITE_OK ){
      if( pCsr->ePlan==FTS5_PLAN_ROWID ){
-        sqlite3_bind_value(pCsr->pStmt, 1, pRowidEq);
+        sqlite3_bind_value(pCsr->pStmt, 1, apVal[0]);
      }else{
        sqlite3_bind_int64(pCsr->pStmt, 1, pCsr->iFirstRowid);
        sqlite3_bind_int64(pCsr->pStmt, 2, pCsr->iLastRowid);
@@ -1345,8 +1262,6 @@ static int fts5FilterMethod(
    }
  }

- filter_out:
-  sqlite3Fts5ExprFree(pExpr);
  pConfig->pzErrmsg = pzErrmsg;
  return rc;
 }
@@ -1427,13 +1342,10 @@ static int fts5SeekCursor(Fts5Cursor *pCsr, int bErrormsg){
  }

  if( rc==SQLITE_OK && CsrFlagTest(pCsr, FTS5CSR_REQUIRE_CONTENT) ){
-    Fts5Table *pTab = (Fts5Table*)(pCsr->base.pVtab);
    assert( pCsr->pExpr );
    sqlite3_reset(pCsr->pStmt);
    sqlite3_bind_int64(pCsr->pStmt, 1, fts5CursorRowid(pCsr));
-    pTab->pConfig->bLock++;
    rc = sqlite3_step(pCsr->pStmt);
-    pTab->pConfig->bLock--;
    if( rc==SQLITE_ROW ){
      rc = SQLITE_OK;
      CsrFlagClear(pCsr, FTS5CSR_REQUIRE_CONTENT);
@@ -1441,10 +1353,6 @@ static int fts5SeekCursor(Fts5Cursor *pCsr, int bErrormsg){
      rc = sqlite3_reset(pCsr->pStmt);
      if( rc==SQLITE_OK ){
        rc = FTS5_CORRUPT;
-      }else if( pTab->pConfig->pzErrmsg ){
-        *pTab->pConfig->pzErrmsg = sqlite3_mprintf(
-            "%s", sqlite3_errmsg(pTab->pConfig->db)
-        );
      }
    }
  }
@@ -2324,7 +2232,7 @@ static void fts5ApiCallback(
  iCsrId = sqlite3_value_int64(argv[0]);

  pCsr = fts5CursorFromCsrid(pAux->pGlobal, iCsrId);
-  if( pCsr==0 || pCsr->ePlan==0 ){
+  if( pCsr==0 ){
    char *zErr = sqlite3_mprintf("no such cursor: %lld", iCsrId);
    sqlite3_result_error(context, zErr, -1);
    sqlite3_free(zErr);
@@ -2460,12 +2368,10 @@ static int fts5ColumnMethod(
      }
    }
  }else if( !fts5IsContentless(pTab) ){
-    pConfig->pzErrmsg = &pTab->p.base.zErrMsg;
    rc = fts5SeekCursor(pCsr, 1);
    if( rc==SQLITE_OK ){
      sqlite3_result_value(pCtx, sqlite3_column_value(pCsr->pStmt, iCol+1));
    }
-    pConfig->pzErrmsg = 0;
  }
  return rc;
 }
@@ -138,9 +138,7 @@ static int fts5StorageGetStmt(
    }else{
      int f = SQLITE_PREPARE_PERSISTENT;
      if( eStmt>FTS5_STMT_LOOKUP ) f |= SQLITE_PREPARE_NO_VTAB;
-      p->pConfig->bLock++;
      rc = sqlite3_prepare_v3(pC->db, zSql, -1, f, &p->aStmt[eStmt], 0);
-      p->pConfig->bLock--;
      sqlite3_free(zSql);
      if( rc!=SQLITE_OK && pzErrMsg ){
        *pzErrMsg = sqlite3_mprintf("%s", sqlite3_errmsg(pC->db));
@@ -560,8 +558,6 @@ int sqlite3Fts5StorageDeleteAll(Fts5Storage *p){
  Fts5Config *pConfig = p->pConfig;
  int rc;

-  p->bTotalsValid = 0;
-
  /* Delete the contents of the %_data and %_docsize tables. */
  rc = fts5ExecPrintf(pConfig->db, 0,
      "DELETE FROM %Q.'%q_data';" 
@@ -613,11 +609,10 @@ int sqlite3Fts5StorageRebuild(Fts5Storage *p){
    for(ctx.iCol=0; rc==SQLITE_OK && ctx.iCol<pConfig->nCol; ctx.iCol++){
      ctx.szCol = 0;
      if( pConfig->abUnindexed[ctx.iCol]==0 ){
-        const char *zText = (const char*)sqlite3_column_text(pScan, ctx.iCol+1);
-        int nText = sqlite3_column_bytes(pScan, ctx.iCol+1);
        rc = sqlite3Fts5Tokenize(pConfig, 
            FTS5_TOKENIZE_DOCUMENT,
-            zText, nText,
+            (const char*)sqlite3_column_text(pScan, ctx.iCol+1),
+            sqlite3_column_bytes(pScan, ctx.iCol+1),
            (void*)&ctx,
            fts5StorageInsertCallback
        );
@@ -739,11 +734,10 @@ int sqlite3Fts5StorageIndexInsert(
  for(ctx.iCol=0; rc==SQLITE_OK && ctx.iCol<pConfig->nCol; ctx.iCol++){
    ctx.szCol = 0;
    if( pConfig->abUnindexed[ctx.iCol]==0 ){
-      const char *zText = (const char*)sqlite3_value_text(apVal[ctx.iCol+2]);
-      int nText = sqlite3_value_bytes(apVal[ctx.iCol+2]);
      rc = sqlite3Fts5Tokenize(pConfig, 
          FTS5_TOKENIZE_DOCUMENT,
-          zText, nText,
+          (const char*)sqlite3_value_text(apVal[ctx.iCol+2]),
+          sqlite3_value_bytes(apVal[ctx.iCol+2]),
          (void*)&ctx,
          fts5StorageInsertCallback
      );
@@ -912,11 +906,10 @@ int sqlite3Fts5StorageIntegrity(Fts5Storage *p){
          rc = sqlite3Fts5TermsetNew(&ctx.pTermset);
        }
        if( rc==SQLITE_OK ){
-          const char *zText = (const char*)sqlite3_column_text(pScan, i+1);
-          int nText = sqlite3_column_bytes(pScan, i+1);
          rc = sqlite3Fts5Tokenize(pConfig, 
              FTS5_TOKENIZE_DOCUMENT,
-              zText, nText,
+              (const char*)sqlite3_column_text(pScan, i+1),
+              sqlite3_column_bytes(pScan, i+1),
              (void*)&ctx,
              fts5StorageIntegrityCallback
          );
@@ -50,7 +50,6 @@ struct Fts5VocabTable {
  sqlite3 *db;                    /* Database handle */
  Fts5Global *pGlobal;            /* FTS5 global object for this database */
  int eType;                      /* FTS5_VOCAB_COL, ROW or INSTANCE */
-  unsigned bBusy;                 /* True if busy */
 };

 struct Fts5VocabCursor {
@@ -333,12 +332,6 @@ static int fts5VocabOpenMethod(
  sqlite3_stmt *pStmt = 0;
  char *zSql = 0;

-  if( pTab->bBusy ){
-    pVTab->zErrMsg = sqlite3_mprintf(
-       "recursive definition for %s.%s", pTab->zFts5Db, pTab->zFts5Tbl
-    );
-    return SQLITE_ERROR;
-  }
  zSql = sqlite3Fts5Mprintf(&rc,
      "SELECT t.%Q FROM %Q.%Q AS t WHERE t.%Q MATCH '*id'",
      pTab->zFts5Tbl, pTab->zFts5Db, pTab->zFts5Tbl, pTab->zFts5Tbl
@@ -350,12 +343,10 @@ static int fts5VocabOpenMethod(
  assert( rc==SQLITE_OK || pStmt==0 );
  if( rc==SQLITE_ERROR ) rc = SQLITE_OK;

-  pTab->bBusy = 1;
  if( pStmt && sqlite3_step(pStmt)==SQLITE_ROW ){
    i64 iId = sqlite3_column_int64(pStmt, 0);
    pFts5 = sqlite3Fts5TableFromCsrid(pTab->pGlobal, iId);
  }
-  pTab->bBusy = 0;

  if( rc==SQLITE_OK ){
    if( pFts5==0 ){
@@ -582,10 +573,8 @@ static int fts5VocabNextMethod(sqlite3_vtab_cursor *pCursor){
  }

  if( rc==SQLITE_OK && pCsr->bEof==0 && pTab->eType==FTS5_VOCAB_COL ){
-    for(/* noop */; pCsr->iCol<nCol && pCsr->aDoc[pCsr->iCol]==0; pCsr->iCol++);
-    if( pCsr->iCol==nCol ){
-      rc = FTS5_CORRUPT;
-    }
+    while( pCsr->aDoc[pCsr->iCol]==0 ) pCsr->iCol++;
+    assert( pCsr->iCol<pCsr->pFts5->pConfig->nCol );
  }
  return rc;
 }
@@ -253,45 +253,5 @@ do_execsql_test 6.2 {
  SELECT name FROM sqlite_master;
 } {}

-#---------------------------------------------------------------------------
-# Check that an fts5 table cannot be its own content table.
-#
-reset_db
-do_execsql_test 7.1.1 {
-  CREATE VIRTUAL TABLE t1 USING fts5(a, c=t1 );
-  INSERT INTO t1( a ) VALUES('abc');
-}
-do_catchsql_test 7.1.2 { 
-  SELECT * FROM t1; 
-} {1 {recursively defined fts5 content table}}
-do_catchsql_test 7.1.3 { 
-  SELECT * FROM t1('abc'); 
-} {1 {recursively defined fts5 content table}}
-do_catchsql_test 7.1.4 { 
-  SELECT count(*) FROM t1;
-} {1 {recursively defined fts5 content table}}
-do_catchsql_test 7.1.5 { 
-  SELECT * FROM t1('abc') ORDER BY rank;
-} {1 {recursively defined fts5 content table}}
-
-reset_db
-do_execsql_test 7.2.1 {
-  CREATE VIRTUAL TABLE t1 USING fts5(a, c=t2 );
-  CREATE VIRTUAL TABLE t2 USING fts5(a, c=t1 );
-  INSERT INTO t1( a ) VALUES('abc');
-}
-do_catchsql_test 7.2.2 { 
-  SELECT * FROM t1; 
-} {1 {recursively defined fts5 content table}}
-do_catchsql_test 7.2.3 { 
-  SELECT * FROM t1('abc'); 
-} {1 {recursively defined fts5 content table}}
-do_catchsql_test 7.2.4 { 
-  SELECT count(*) FROM t1;
-} {1 {recursively defined fts5 content table}}
-do_catchsql_test 7.2.5 { 
-  SELECT * FROM t1('abc') ORDER BY rank;
-} {1 {recursively defined fts5 content table}}

 finish_test
-
@@ -1,61 +0,0 @@
-# 2019 May 16
-#
-# The author disclaims copyright to this source code.  In place of
-# a legal notice, here is a blessing:
-#
-#    May you do good and not evil.
-#    May you find forgiveness for yourself and forgive others.
-#    May you share freely, never taking more than you give.
-#
-#***********************************************************************
-#
-#
-
-source [file join [file dirname [info script]] fts5_common.tcl]
-set testprefix fts5corrupt4
-
-# If SQLITE_ENABLE_FTS5 is defined, omit this file.
-ifcapable !fts5 {
-  finish_test
-  return
-}
-sqlite3_fts5_may_be_corrupt 1
-
-do_execsql_test 1.0 {
-  CREATE VIRTUAL TABLE ttt USING fts5(a, b); 
-  INSERT INTO ttt 
-     VALUES('e ee eee e ee eee e ee eee', 'eee ee e e e ee eee ee ee');
-  INSERT INTO ttt SELECT a||a, b||b FROM ttt;   
-  INSERT INTO ttt SELECT a||a, b||b FROM ttt;   
-}
-
-proc mutate {blob i} {
-  set o [expr {$i % [string length $blob]}]
-  set a [string range $blob 0 $o-1]
-  set b [string range $blob $o+1 end]
-  set v [expr int(rand()*255) - 127]
-  return "$a[binary format c $v]$b"
-}
-db func mutate mutate
-
-for {set j 1000} {$j <= 5000} {incr j 1000} {
-  do_test 1.$j {
-    for {set i 0} {$i < 1000} {incr i} {
-      execsql {
-        BEGIN;
-          UPDATE ttt_data SET block = mutate(block, $i) WHERE id>10;
-      }
-      foreach sql {
-        {SELECT snippet(ttt, -1, '.', '..', '[', ']'), * FROM ttt('e*')}
-        {SELECT snippet(ttt, -1, '.', '..', '[', ']'), * FROM ttt('e* NOT ee*')}
-      } {
-        catch { execsql $sql }
-      }
-      execsql ROLLBACK
-    }
-  } {}
-}
-
-sqlite3_fts5_may_be_corrupt 0
-finish_test
-
@@ -59,27 +59,10 @@ do_catchsql_test 2.1 {
  SELECT fts5_expr()
 } {1 {wrong number of arguments to function fts5_expr}}

-do_catchsql_test 2.2 {
+do_catchsql_test 2.1 {
  SELECT fts5_expr_tcl()
 } {1 {wrong number of arguments to function fts5_expr_tcl}}

-do_catchsql_test 2.3 {
-  SELECT fts5_expr('')
-} {1 {fts5: syntax error near ""}}
-
-do_catchsql_test 2.4 {
-  SELECT fts5_expr(NULL)
-} {1 {fts5: syntax error near ""}}
-
-do_catchsql_test 2.5 {
-  SELECT fts5_expr(NULL, NULL)
-} {1 {parse error in ""}}
-
-for {set i 0} {$i < 255} {incr i} {
-  do_test 2.6.$i {
-    lindex [catchsql {sELECT fts5_expr(NULL, char($i));}] 0
-  } 1
-}

 do_execsql_test 3.0 {
  CREATE VIRTUAL TABLE e1 USING fts5(text, tokenize = 'porter unicode61');
@@ -147,27 +147,5 @@ do_faultsim_test 5.1 -faults oom* -body {
  faultsim_test_result {0 {1 4}}
 }

-#-------------------------------------------------------------------------
-# Test OOM injection in a query with two MATCH expressions
-#
-reset_db
-do_execsql_test 6.0 {
-  CREATE VIRTUAL TABLE t1 USING fts5(a);
-  INSERT INTO t1 VALUES('a b c d');  -- 1
-  INSERT INTO t1 VALUES('d a b c');  -- 2
-  INSERT INTO t1 VALUES('c d a b');  -- 3
-  INSERT INTO t1 VALUES('b c d a');  -- 4
-}
-do_faultsim_test 6.1 -faults oom* -body {
-  execsql { SELECT rowid FROM t1 WHERE t1 MATCH 'a' AND t1 MATCH 'b' }
-} -test {
-  faultsim_test_result {0 {1 2 3 4}}
-}
-do_faultsim_test 6.2 -faults oom* -body {
-  execsql { SELECT rowid FROM t1 WHERE t1 MATCH 'a OR b' AND t1 MATCH 'c OR d' }
-} -test {
-  faultsim_test_result {0 {1 2 3 4}}
-}
-

 finish_test
@@ -36,7 +36,7 @@ do_test 1.1 {
      execsql { INSERT INTO x8 VALUES( rnddoc(5) ); }
    }
  } msg] $msg
-} {0 {}}
+} {1 {database or disk is full}}


 finish_test
@@ -210,76 +210,4 @@ foreach {tn pgsz} {
  } {1000}
 }

-#-------------------------------------------------------------------------
-#
-reset_db
-do_execsql_test 7.0 {
-  PRAGMA encoding = 'UTF-16';
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-  INSERT INTO vt0 VALUES (x'46f0');
-  SELECT quote(c0) FROM vt0;
-} {X'46F0'}
-do_execsql_test 7.1 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-do_execsql_test 7.2 {
-  INSERT INTO vt0(vt0) VALUES('rebuild');
-}
-do_execsql_test 7.3 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-do_execsql_test 7.4 {
-  UPDATE vt0 SET c0='';
-}
-do_execsql_test 7.5 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-# Ticket 7a458c2a5f4
-#
-reset_db
-do_execsql_test 8.0 {
-  PRAGMA locking_mode = EXCLUSIVE;
-  PRAGMA journal_mode = PERSIST;
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-} {exclusive persist}
-do_execsql_test 8.1 {
-  PRAGMA data_version
-} {1}
-do_execsql_test 8.2 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-  PRAGMA data_version;
-} {1}
-do_execsql_test 8.1 {
-  INSERT INTO vt0(vt0, rank) VALUES('usermerge', 2);
-}
-
-#-------------------------------------------------------------------------
-# Ticket [771fe617]
-#
-reset_db
-do_execsql_test 9.0 {
-  PRAGMA encoding = 'UTF16';
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-}
-
-#explain_i { SELECT quote(SUBSTR(x'37', 0)); }
-#execsql { PRAGMA vdbe_trace = 1 }
-do_execsql_test 9.1.1 {
-  SELECT quote(SUBSTR(x'37', 0));
-} {X'37'}
-do_execsql_test 9.1.2 {
-  SELECT quote(x'37');
-} {X'37'}
-
-breakpoint
-do_execsql_test 9.2 {
-  INSERT INTO vt0 VALUES (SUBSTR(x'37', 0));
--  INSERT INTO vt0 VALUES (x'37');
-}
-do_execsql_test 9.3 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
 finish_test
@@ -491,33 +491,4 @@ do_catchsql_test 14.2 {
  SELECT matchinfo(x1, 'd') FROM x1('a b c');
 } {1 {unrecognized matchinfo flag: d}}

-#-------------------------------------------------------------------------
-# Test using matchinfo() and similar on a non-full-text query
-#
-do_execsql_test 15.0 {
-  CREATE VIRTUAL TABLE t1 USING fts5(x, y);
-  INSERT INTO t1 VALUES('a', 'b');
-  INSERT INTO t1 VALUES('c', 'd');
-}
-
-if {$tcl_platform(byteOrder)=="littleEndian"} {
-  set res {X'02000000'}
-} else {
-  set res {X'00000002'}
-}
-do_execsql_test 15.1 {
-  SELECT quote(matchinfo(t1, 'n')) FROM t1 LIMIT 1;
-} $res
-do_execsql_test 15.2 {
-  DELETE FROM t1_content WHERE rowid=1;
-  SELECT quote(matchinfo(t1, 'n')) FROM t1 LIMIT 1;
-} $res
-
-fts5_aux_test_functions db
-do_execsql_test 15.3 {
-  SELECT fts5_test_all(t1) FROM t1 LIMIT 1;
-} {
-  {columnsize {0 0} columntext {c d} columntotalsize {2 2} poslist {} tokenize {c d} rowcount 2}
-}
-
 finish_test
@@ -1,327 +0,0 @@
-# 2019 September 02
-#
-# The author disclaims copyright to this source code.  In place of
-# a legal notice, here is a blessing:
-#
-#    May you do good and not evil.
-#    May you find forgiveness for yourself and forgive others.
-#    May you share freely, never taking more than you give.
-#
-#*************************************************************************
-# This file implements regression tests for SQLite library.  The
-# focus of this script is testing the FTS5 module.
-#
-
-source [file join [file dirname [info script]] fts5_common.tcl]
-set testprefix fts5misc
-
-# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
-ifcapable !fts5 {
-  finish_test
-  return
-}
-
-do_execsql_test 1.0 {
-  CREATE VIRTUAL TABLE t1 USING fts5(a);
-}
-
-do_catchsql_test 1.1.1 { 
-  SELECT highlight(t1, 4, '<b>', '</b>') FROM t1('*'); 
-} {1 {unknown special query: }}
-do_catchsql_test 1.1.2 {
-  SELECT a FROM t1
-    WHERE rank = (SELECT highlight(t1, 4, '<b>', '</b>') FROM t1('*'));
-} {1 {unknown special query: }}
-
-do_catchsql_test 1.2.1 { 
-  SELECT highlight(t1, 4, '<b>', '</b>') FROM t1('*id'); 
-} {0 {{}}}
-
-do_catchsql_test 1.2.2 {
-  SELECT a FROM t1
-    WHERE rank = (SELECT highlight(t1, 4, '<b>', '</b>') FROM t1('*id'));
-} {0 {}}
-
-do_catchsql_test 1.3.1 { 
-  SELECT highlight(t1, 4, '<b>', '</b>') FROM t1('*reads'); 
-} {1 {no such cursor: 1}}
-
-do_catchsql_test 1.3.2 {
-  SELECT a FROM t1
-    WHERE rank = (SELECT highlight(t1, 4, '<b>', '</b>') FROM t1('*reads'));
-} {1 {no such cursor: 1}}
-
-db close
-sqlite3 db test.db
-
-do_catchsql_test 1.3.3 {
-  SELECT a FROM t1
-    WHERE rank = (SELECT highlight(t1, 4, '<b>', '</b>') FROM t1('*reads'));
-} {1 {no such cursor: 1}}
-
-#-------------------------------------------------------------------------
-reset_db
-do_execsql_test 2.0 {
-  CREATE TABLE t0(c0);
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-}
-do_execsql_test 2.1.1 {
-  BEGIN TRANSACTION;
-  INSERT INTO vt0(c0) VALUES ('xyz');
-}
-do_execsql_test 2.1.2 {
-  ALTER TABLE t0 ADD COLUMN c5;
-}
-do_execsql_test 2.1.3 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-do_execsql_test 2.1.4 {
-  INSERT INTO vt0(c0) VALUES ('abc');
-  COMMIT
-}
-do_execsql_test 2.1.5 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-reset_db
-do_execsql_test 2.2.1 {
-  CREATE TABLE t0(c0);
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-  BEGIN TRANSACTION;
-  INSERT INTO vt0(c0) VALUES ('xyz');
-}
-
-breakpoint
-do_execsql_test 2.2.2 {
-  ALTER TABLE t0 RENAME TO t1;
-}
-do_execsql_test 2.2.3 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-do_execsql_test 2.2.4 {
-  INSERT INTO vt0(c0) VALUES ('abc');
-  COMMIT;
-}
-do_execsql_test 2.2.5 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-reset_db
-do_execsql_test 3.0 {
-  CREATE VIRTUAL TABLE vt0 USING fts5(a);
-  PRAGMA reverse_unordered_selects = true;
-  INSERT INTO vt0 VALUES('365062398'), (0), (0);
-  INSERT INTO vt0(vt0, rank) VALUES('pgsz', '38');
-}
-do_execsql_test 3.1 {
-  UPDATE vt0 SET a = 399905135; -- unexpected: database disk image is malformed
-}
-do_execsql_test 3.2 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-reset_db
-do_execsql_test 4.0 {
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-  INSERT INTO vt0(c0) VALUES ('xyz');
-}
-
-do_execsql_test 4.1 {
-  BEGIN;
-    INSERT INTO vt0(c0) VALUES ('abc');
-    INSERT INTO vt0(vt0) VALUES('rebuild');
-  COMMIT;
-}
-
-do_execsql_test 4.2 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-do_execsql_test 4.3 {
-  BEGIN;
-    INSERT INTO vt0(vt0) VALUES('rebuild');
-    INSERT INTO vt0(vt0) VALUES('rebuild');
-  COMMIT;
-}
-
-do_execsql_test 4.4 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-# Ticket [81a7f7b9].
-#
-reset_db
-do_execsql_test 5.0 {
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0, c1);
-  INSERT INTO vt0(vt0, rank) VALUES('pgsz', '65536');
-  WITH s(i) AS (
-    SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<1236
-  )
-  INSERT INTO vt0(c0) SELECT '0' FROM s;
-} {}
-
-do_execsql_test 5.1 {
-  UPDATE vt0 SET c1 = 'T,D&p^y/7#3*v<b<4j7|f';
-}
-
-do_execsql_test 5.2 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-do_catchsql_test 5.3 {
-  INSERT INTO vt0(vt0, rank) VALUES('pgsz', '65537');
-} {1 {SQL logic error}}
-
-#-------------------------------------------------------------------------
-# Ticket [d392017c].
-#
-reset_db
-do_execsql_test 6.0 {
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-  WITH s(i) AS (
-    SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<10000
-  )
-  INSERT INTO vt0(c0) SELECT '0' FROM s;
-  INSERT INTO vt0(vt0, rank) VALUES('crisismerge', 2000);
-  INSERT INTO vt0(vt0, rank) VALUES('automerge', 0);
-} {}
-
-do_execsql_test 6.1 {
-  INSERT INTO vt0(vt0) VALUES('rebuild');
-}
-
-#-------------------------------------------------------------------------
-#
-reset_db
-do_execsql_test 7.0 {
-  CREATE VIRTUAL TABLE t1 USING fts5(x);
-  INSERT INTO t1(rowid, x) VALUES(1, 'hello world');
-  INSERT INTO t1(rowid, x) VALUES(2, 'well said');
-  INSERT INTO t1(rowid, x) VALUES(3, 'hello said');
-  INSERT INTO t1(rowid, x) VALUES(4, 'well world');
-
-  CREATE TABLE t2 (a, b);
-  INSERT INTO t2 VALUES(1, 'hello');
-  INSERT INTO t2 VALUES(2, 'world');
-  INSERT INTO t2 VALUES(3, 'said');
-  INSERT INTO t2 VALUES(4, 'hello');
-}
-
-do_execsql_test 7.1 {
-  SELECT rowid FROM t1 WHERE (rowid, x) IN (SELECT a, b FROM t2); 
-}
-
-do_execsql_test 7.2 {
-  SELECT rowid FROM t1 WHERE rowid=2 AND t1 = 'hello';
-}
-
-#-------------------------------------------------------------------------
-#
-reset_db
-do_execsql_test 8.0 {
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0, tokenize = "ascii", prefix = 1);
-  INSERT INTO vt0(c0) VALUES (x'd1');
-}
-
-do_execsql_test 8.1 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-#
-reset_db
-do_execsql_test 9.0 {
-  CREATE VIRTUAL TABLE t1 using FTS5(mailcontent);
-  insert into t1(rowid, mailcontent) values
-      (-4764623217061966105, 'we are going to upgrade'),
-      (8324454597464624651, 'we are going to upgrade');
-}
-
-do_execsql_test 9.1 {
-  INSERT INTO t1(t1) VALUES('integrity-check');
-}
-
-do_execsql_test 9.2 {
-  SELECT rowid FROM t1('upgrade');
-} {
-  -4764623217061966105 8324454597464624651
-}
-
-#-------------------------------------------------------------------------
-#
-reset_db
-do_execsql_test 10.0 {
-  CREATE VIRTUAL TABLE vt1 USING fts5(c1, c2, prefix = 1, tokenize = "ascii");
-  INSERT INTO vt1 VALUES (x'e4', '䔬');
-}
-
-do_execsql_test 10.1 {
-  SELECT quote(CAST(c1 AS blob)), quote(CAST(c2 AS blob)) FROM vt1
-} {X'E4' X'E494AC'}
-
-do_execsql_test 10.2 {
-  INSERT INTO vt1(vt1) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-#
-reset_db
-do_execsql_test 11.0 {
-  CREATE VIRTUAL TABLE vt0 USING fts5(
-      c0, prefix = 71, tokenize = "porter ascii", prefix = 9
-  );
-} {}
-do_execsql_test 11.1 {
-  BEGIN;
-  INSERT INTO vt0(c0) VALUES (x'e8');
-}
-do_execsql_test 11.2 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-# Ticket [752fdbf6] 
-#
-reset_db
-do_execsql_test 11.0 {
-  PRAGMA encoding = 'UTF-16';
-  CREATE VIRTUAL TABLE vt0 USING fts5(c0, c1);
-  INSERT INTO vt0(vt0, rank) VALUES('pgsz', '37');
-  INSERT INTO vt0(c0, c1) VALUES (0.66077, 1957391816);
-}
-do_execsql_test 11.1 {
-  INSERT INTO vt0(vt0) VALUES('integrity-check');
-}
-
-#-------------------------------------------------------------------------
-# Ticket [7c0e06b16] 
-#
-do_execsql_test 12.0 {
-  CREATE TABLE t1(a, b, rank);
-  INSERT INTO t1 VALUES('a', 'hello', '');
-  INSERT INTO t1 VALUES('b', 'world', '');
-
-  CREATE VIRTUAL TABLE ft USING fts5(a);
-  INSERT INTO ft VALUES('b');
-  INSERT INTO ft VALUES('y');
-
-  CREATE TABLE t2(x, y, ft);
-  INSERT INTO t2 VALUES(1, 2, 'x');
-  INSERT INTO t2 VALUES(3, 4, 'b');
-}
-
-do_execsql_test 12.1 {
-  SELECT * FROM t1 NATURAL JOIN ft WHERE ft MATCH('b')
-} {b world {}}
-do_execsql_test 12.2 {
-  SELECT * FROM ft NATURAL JOIN t1 WHERE ft MATCH('b')
-} {b world {}}
-do_execsql_test 12.3 {
-  SELECT * FROM t2 JOIN ft USING (ft)
-} {3 4 b b}
-
-finish_test
-
@@ -1,99 +0,0 @@
-# 2014 September 13
-#
-# The author disclaims copyright to this source code.  In place of
-# a legal notice, here is a blessing:
-#
-#    May you do good and not evil.
-#    May you find forgiveness for yourself and forgive others.
-#    May you share freely, never taking more than you give.
-#
-#*************************************************************************
-# This file implements regression tests for SQLite library.  The
-# focus of this script is testing the FTS5 module.
-#
-
-source [file join [file dirname [info script]] fts5_common.tcl]
-set testprefix fts5multi
-
-# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
-ifcapable !fts5 {
-  finish_test
-  return
-}
-
-fts5_aux_test_functions db
-
-do_execsql_test 1.0 {
-  CREATE VIRTUAL TABLE t1 USING fts5(a, b, c);
-  INSERT INTO t1 VALUES('gg bb bb'   ,'gg ff gg'   ,'ii ii');
-  INSERT INTO t1 VALUES('dd dd hh kk','jj'         ,'aa');
-  INSERT INTO t1 VALUES('kk gg ee'   ,'hh cc'      ,'hh jj aa cc');
-  INSERT INTO t1 VALUES('hh'         ,'bb jj cc'   ,'kk ii');
-  INSERT INTO t1 VALUES('kk dd kk ii','aa ee aa'   ,'ee');
-  INSERT INTO t1 VALUES('ee'         ,'ff gg kk aa','ee ff ee');
-  INSERT INTO t1 VALUES('ff jj'      ,'gg ee'      ,'kk ee gg kk');
-  INSERT INTO t1 VALUES('ff ee dd hh','kk ee'      ,'gg dd');
-  INSERT INTO t1 VALUES('bb'         ,'aa'         ,'bb aa');
-  INSERT INTO t1 VALUES('hh cc bb'   ,'ff bb'      ,'cc');
-  INSERT INTO t1 VALUES('jj'         ,'ff dd bb aa','dd dd ff ff');
-  INSERT INTO t1 VALUES('ff dd gg dd','gg aa bb ff','cc');
-  INSERT INTO t1 VALUES('ff aa cc jj','kk'         ,'ii dd');
-  INSERT INTO t1 VALUES('jj dd'      ,'cc'         ,'ii hh ee aa');
-  INSERT INTO t1 VALUES('ff ii hh'   ,'dd'         ,'gg');
-  INSERT INTO t1 VALUES('ff dd gg hh','hh'         ,'ff dd');
-  INSERT INTO t1 VALUES('cc cc'      ,'ff dd ff'   ,'bb');
-  INSERT INTO t1 VALUES('ii'         ,'bb ii'      ,'jj kk');
-  INSERT INTO t1 VALUES('ff hh'      ,'hh bb'      ,'bb dd ee');
-  INSERT INTO t1 VALUES('jj kk'      ,'jj'         ,'gg ff cc');
-  INSERT INTO t1 VALUES('dd kk'      ,'ii gg'      ,'dd');
-  INSERT INTO t1 VALUES('cc'         ,'aa ff'      ,'ii');
-  INSERT INTO t1 VALUES('bb ff bb ii','bb kk bb aa','hh ff ii dd');
-  INSERT INTO t1 VALUES('aa'         ,'ee bb jj jj','dd');
-  INSERT INTO t1 VALUES('kk dd cc'   ,'aa jj'      ,'ee aa ff');
-  INSERT INTO t1 VALUES('aa gg aa'   ,'jj'         ,'ii kk hh gg');
-  INSERT INTO t1 VALUES('ff hh aa'   ,'jj ii'      ,'hh dd bb jj');
-  INSERT INTO t1 VALUES('hh'         ,'aa gg kk'   ,'bb ee');
-  INSERT INTO t1 VALUES('bb'         ,'ee'         ,'gg');
-  INSERT INTO t1 VALUES('dd kk'      ,'kk bb aa'   ,'ee');
-}
-
-foreach {tn c1 e1 c2 e2} {
-  1     t1 aa     t1 bb
-  2     a  aa     b  bb
-  3     a  "aa OR bb OR cc"    b  "jj OR ii OR hh"
-  4     t1  "aa AND bb"       t1  "cc"
-  5     c   "kk"               b  "aa OR bb OR cc OR dd OR ee"
-} {
-  if {$c1=="t1"} {
-    set lhs "( $e1 )"
-  } else {
-    set lhs "$c1 : ( $e1 )"
-  }
-  if {$c2=="t1"} {
-    set rhs "( $e2 )"
-  } else {
-    set rhs "$c2 : ( $e2 )"
-  }
-
-  set q1 "t1 MATCH '($lhs) AND ($rhs)'"
-  set q2 "$c1 MATCH '$e1' AND $c2 MATCH '$e2'"
-
-  set ret [execsql "SELECT rowid FROM t1 WHERE $q1"]
-  set N [llength $ret]
-  do_execsql_test 1.$tn.1.($N) "SELECT rowid FROM t1 WHERE $q2" $ret
-
-  set ret [execsql "SELECT fts5_test_poslist(t1) FROM t1 WHERE $q1"]
-  do_execsql_test 1.$tn.2.($N) "
-    SELECT fts5_test_poslist(t1) FROM t1 WHERE $q2
-  " $ret
-}
-
-do_catchsql_test 2.1.1 {
-  SELECT rowid FROM t1 WHERE t1 MATCH '(NOT' AND t1 MATCH 'aa bb';
-} {1 {fts5: syntax error near "NOT"}}
-do_catchsql_test 2.1.2 {
-  SELECT rowid FROM t1 WHERE t1 MATCH 'aa bb' AND t1 MATCH '(NOT';
-} {1 {fts5: syntax error near "NOT"}}
-
-finish_test
-
@@ -31,7 +31,7 @@ do_eqp_test 1.1 {
 } {
  QUERY PLAN
  |--SCAN TABLE t1
-  `--SCAN TABLE f1 VIRTUAL TABLE INDEX 0:m
+  `--SCAN TABLE f1 VIRTUAL TABLE INDEX 65537:
 }

 do_eqp_test 1.2 {
@@ -46,7 +46,7 @@ do_eqp_test 1.3 {
  SELECT * FROM f1 WHERE f1 MATCH ? ORDER BY ff
 } {
  QUERY PLAN
-  |--SCAN TABLE f1 VIRTUAL TABLE INDEX 0:m
+  |--SCAN TABLE f1 VIRTUAL TABLE INDEX 65537:
  `--USE TEMP B-TREE FOR ORDER BY
 }

@@ -60,6 +60,6 @@ do_eqp_test 1.4 {

 do_eqp_test 1.5 {
  SELECT * FROM f1 WHERE rank MATCH ?
-} {SCAN TABLE f1 VIRTUAL TABLE INDEX 0:r}
+} {SCAN TABLE f1 VIRTUAL TABLE INDEX 2:}

 finish_test
@@ -162,22 +162,4 @@ do_execsql_test 5.1 {
  SELECT rowid FROM ttt('word') WHERE rowid BETWEEN 30 AND 40 ORDER BY rank;
 } {30 31 32 33 34 35 36 37 38 39 40}

-#-------------------------------------------------------------------------
-reset_db
-do_execsql_test 6.0 {
-  CREATE VIRTUAL TABLE "My.Table" USING fts5(Text);
-
-  INSERT INTO "My.Table" VALUES ('hello this is a test');
-  INSERT INTO "My.Table" VALUES ('of trying to order by');
-  INSERT INTO "My.Table" VALUES ('rank on an fts5 table');
-  INSERT INTO "My.Table" VALUES ('that have periods in');
-  INSERT INTO "My.Table" VALUES ('the table names.');
-  INSERT INTO "My.Table" VALUES ('table table table');
-}
-do_execsql_test 6.1 {
-  SELECT * FROM "My.Table" WHERE Text MATCH 'table' ORDER BY rank;
-} {
-  {table table table} {the table names.} {rank on an fts5 table}
-}
-
 finish_test
@@ -1,85 +0,0 @@
-# 2019 Dec 26
-#
-# The author disclaims copyright to this source code.  In place of
-# a legal notice, here is a blessing:
-#
-#    May you do good and not evil.
-#    May you find forgiveness for yourself and forgive others.
-#    May you share freely, never taking more than you give.
-#
-#***********************************************************************
-#
-
-source [file join [file dirname [info script]] fts5_common.tcl]
-set testprefix fts5savepoint
-
-# If SQLITE_ENABLE_FTS5 is defined, omit this file.
-ifcapable !fts5 {
-  finish_test
-  return
-}
-
-do_execsql_test 1.0 {
-  CREATE VIRTUAL TABLE ft USING fts5(c);
-  BEGIN;
-    SAVEPOINT one;
-      INSERT INTO ft VALUES('a');
-      SAVEPOINT two;
-        INSERT INTO ft VALUES('b');
-      RELEASE two;
-      SAVEPOINT four;
-        INSERT INTO ft VALUES('c');
-      RELEASE four;
-      SAVEPOINT three;
-        INSERT INTO ft VALUES('d');
-      ROLLBACK TO three;
-  COMMIT;
-  SELECT * FROM ft
-} {a b c}
-
-reset_db
-do_catchsql_test 2.0 {
-  CREATE VIRTUAL TABLE ft1 USING fts5(c);
-  CREATE VIRTUAL TABLE ft2 USING fts5(c);
-  DROP TABLE ft2_idx;
-  BEGIN;
-      INSERT INTO ft2 VALUES('a');
-      INSERT INTO ft1 VALUES('a');
-      SAVEPOINT two;
-        INSERT INTO ft1 VALUES('b');
-  COMMIT;
-} {1 {SQL logic error}}
-
-reset_db
-ifcapable fts3 {
-  do_execsql_test 3.0 {
-    CREATE VIRTUAL TABLE vt0 USING fts5(c0);
-    CREATE VIRTUAL TABLE vt1 USING fts4(c0);
-    INSERT INTO vt1(c0) VALUES(0);
-  }
-
-  do_execsql_test 3.1 {
-    BEGIN;
-      UPDATE vt1 SET c0 = 0;
-      INSERT INTO vt1(c0) VALUES (0), (0);
-      UPDATE vt0 SET c0 = 0;
-      INSERT INTO vt1(c0) VALUES (0);
-      UPDATE vt1 SET c0 = 0;
-      INSERT INTO vt1(vt1) VALUES('automerge=1');
-      UPDATE vt1 SET c0 = 0;
-  }
-
-  do_catchsql_test 3.2 {
-    DROP TABLE vt1;
-  } {1 {SQL logic error}}
-
-  do_execsql_test 3.3 {
-    SAVEPOINT x;
-      INSERT INTO vt0 VALUES('x');
-    COMMIT;
-    INSERT INTO vt0(vt0) VALUES('integrity-check');
-  }
-}
-
-finish_test
-
@@ -467,17 +467,4 @@ do_execsql_test 21.3 {
  SELECT rowid FROM x1($doc);
 } {11112}

-#-------------------------------------------------------------------------
-reset_db
-do_execsql_test 22.0 {
-  CREATE VIRTUAL TABLE x1 USING fts5(x);
-  INSERT INTO x1(x) VALUES('a b c');
-  INSERT INTO x1(x) VALUES('x y z');
-  INSERT INTO x1(x) VALUES('c b a');
-  INSERT INTO x1(x) VALUES('z y x');
-}
-
-do_catchsql_test 22.1 {SELECT * FROM x1('')}   {1 {fts5: syntax error near ""}}
-do_catchsql_test 22.2 {SELECT * FROM x1(NULL)} {1 {fts5: syntax error near ""}}
-
 finish_test
@@ -542,16 +542,5 @@ do_execsql_test 10.7.3 {
  SELECT * FROM t2 WHERE term=?;
 }

-# 2020-02-16  Detect recursively define fts5vocab() tables.
-# Error found by dbsqlfuzz.
-#
-reset_db
-do_execsql_test 11.100 {
-  CREATE VIRTUAL TABLE t3 USING fts5vocab(rowid , 'col');
-  CREATE VIRTUAL TABLE rowid USING fts5vocab(rowid , 'instance');
-} {}
-do_catchsql_test 11.110 {
-  SELECT rowid+1,rowid, * FROM t3 WHERE null>rowid ;
-} {1 {SQL logic error}}
-
 finish_test
+
@@ -116,8 +116,7 @@ SQLite. Documentation follows.
  and use it as a dynamically loadable SQLite extension. To do this
  using gcc on *nix:

-    gcc -fPIC -shared icu.c `pkg-config --libs --cflags icu-uc icu-io` \
-        -o libSqliteIcu.so
+    gcc -shared icu.c `icu-config --ldflags` -o libSqliteIcu.so

  You may need to add "-I" flags so that gcc can find sqlite3ext.h
  and sqlite3.h. The resulting shared lib, libSqliteIcu.so, may be
@@ -143,7 +143,7 @@ static int icuLikeCompare(
    **     3. uPattern is an unescaped escape character, or
    **     4. uPattern is to be handled as an ordinary character
    */
-    if( uPattern==MATCH_ALL && !prevEscape && uPattern!=(uint32_t)uEsc ){
+    if( !prevEscape && uPattern==MATCH_ALL ){
      /* Case 1. */
      uint8_t c;

@@ -169,12 +169,12 @@ static int icuLikeCompare(
      }
      return 0;

-    }else if( uPattern==MATCH_ONE && !prevEscape && uPattern!=(uint32_t)uEsc ){
+    }else if( !prevEscape && uPattern==MATCH_ONE ){
      /* Case 2. */
      if( *zString==0 ) return 0;
      SQLITE_ICU_SKIP_UTF8(zString);

-    }else if( uPattern==(uint32_t)uEsc && !prevEscape ){
+    }else if( !prevEscape && uPattern==(uint32_t)uEsc){
      /* Case 3. */
      prevEscape = 1;

@@ -499,27 +499,26 @@ static void icuLoadCollation(
 ** Register the ICU extension functions with database db.
 */
 int sqlite3IcuInit(sqlite3 *db){
-# define SQLITEICU_EXTRAFLAGS (SQLITE_DETERMINISTIC|SQLITE_INNOCUOUS)
  static const struct IcuScalar {
    const char *zName;                        /* Function name */
    unsigned char nArg;                       /* Number of arguments */
-    unsigned int enc;                         /* Optimal text encoding */
+    unsigned short enc;                       /* Optimal text encoding */
    unsigned char iContext;                   /* sqlite3_user_data() context */
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
  } scalars[] = {
-    {"icu_load_collation",2,SQLITE_UTF8|SQLITE_DIRECTONLY,1, icuLoadCollation},
+    {"icu_load_collation",  2, SQLITE_UTF8,                1, icuLoadCollation},
 #if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU)
-    {"regexp", 2, SQLITE_ANY|SQLITEICU_EXTRAFLAGS,         0, icuRegexpFunc},
-    {"lower",  1, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       0, icuCaseFunc16},
-    {"lower",  2, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       0, icuCaseFunc16},
-    {"upper",  1, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       1, icuCaseFunc16},
-    {"upper",  2, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       1, icuCaseFunc16},
-    {"lower",  1, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuCaseFunc16},
-    {"lower",  2, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuCaseFunc16},
-    {"upper",  1, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        1, icuCaseFunc16},
-    {"upper",  2, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        1, icuCaseFunc16},
-    {"like",   2, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuLikeFunc},
-    {"like",   3, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuLikeFunc},
+    {"regexp", 2, SQLITE_ANY|SQLITE_DETERMINISTIC,         0, icuRegexpFunc},
+    {"lower",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
+    {"lower",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
+    {"upper",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
+    {"upper",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
+    {"lower",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
+    {"lower",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
+    {"upper",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
+    {"upper",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
+    {"like",   2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},
+    {"like",   3, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},
 #endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU) */
  };
  int rc = SQLITE_OK;
@@ -24,3 +24,4 @@ int sqlite3IcuInit(sqlite3 *db);
 #ifdef __cplusplus
 }  /* extern "C" */
 #endif  /* __cplusplus */
+
@@ -43,10 +43,10 @@ LSMTESTSRC = $(LSMDIR)/lsm-test/lsmtest1.c $(LSMDIR)/lsm-test/lsmtest2.c     \

 # all: lsm.so

-LSMOPTS += -fPIC -DLSM_MUTEX_PTHREADS=1 -I$(LSMDIR) -DHAVE_ZLIB
+LSMOPTS += -DLSM_MUTEX_PTHREADS=1 -I$(LSMDIR) -DHAVE_ZLIB

 lsm.so:	$(LSMOBJ)
-	$(TCCX) -shared -fPIC -o lsm.so $(LSMOBJ)
+	$(TCCX) -shared -o lsm.so $(LSMOBJ)

 %.o:	$(LSMDIR)/%.c $(LSMHDR) sqlite3.h
 	$(TCCX) $(LSMOPTS) -c $<
@@ -654,3 +654,5 @@ void test_data_3(
    testFree(zName);
  }
 }
+
+
@@ -322,3 +322,5 @@ void do_writer_crash_test(const char *zPattern, int *pRc){
  }

 }
+
+
@@ -138,3 +138,6 @@ void test_data_4(
    testFree(zName);
  }
 }
+
+
+
@@ -69,3 +69,7 @@ int do_bt(int nArg, char **azArg){
  sqlite4_buffer_clear(&buf.output);
  return 0;
 }
+
+
+
+
@@ -553,7 +553,7 @@ static int sql_begin(TestDb *pTestDb, int iLevel){
  /* If there are no transactions at all open, open a read transaction. */
  if( pDb->nOpenTrans==0 ){
    int rc = sqlite3_exec(pDb->db, 
-        "BEGIN; SELECT * FROM sqlite_schema LIMIT 1;" , 0, 0, 0
+        "BEGIN; SELECT * FROM sqlite_master LIMIT 1;" , 0, 0, 0
    );
    if( rc!=0 ) return rc;
    pDb->nOpenTrans = 1;
@@ -367,3 +367,4 @@ int test_mdb_scan(
 }

 #endif /* HAVE_MDB */
+
@@ -978,3 +978,5 @@ static int bgc_detach(BtDb *pDb){
 /*
 ** End of background checkpointer.
 *************************************************************************/
+
+
@@ -228,10 +228,6 @@ static int lsmPosixOsRemap(
    }

    p->pMap = mmap(0, iSz, PROT_READ|PROT_WRITE, MAP_SHARED, p->fd, 0);
-    if( p->pMap==MAP_FAILED ){
-      p->pMap = 0;
-      return LSM_IOERR_BKPT;
-    }
    p->nMap = iSz;
  }

@@ -417,10 +413,7 @@ static int lsmPosixOsShmMap(lsm_file *pFile, int iChunk, int sz, void **ppShm){
    p->apShm[iChunk] = mmap(0, LSM_SHM_CHUNK_SIZE, 
        PROT_READ|PROT_WRITE, MAP_SHARED, p->shmfd, iChunk*LSM_SHM_CHUNK_SIZE
    );
-    if( p->apShm[iChunk]==MAP_FAILED ){
-      p->apShm[iChunk] = 0;
-      return LSM_IOERR_BKPT;
-    }
+    if( p->apShm[iChunk]==0 ) return LSM_IOERR_BKPT;
  }

  *ppShm = p->apShm[iChunk];
@@ -842,7 +842,7 @@ static int lsm1BestIndex(

  const struct sqlite3_index_constraint *pConstraint;
  pConstraint = pIdxInfo->aConstraint;
-  for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
+  for(i=0; i<pIdxInfo->nConstraint && idxNum<16; i++, pConstraint++){
    if( pConstraint->usable==0 ) continue;
    if( pConstraint->iColumn!=0 ) continue;
    switch( pConstraint->op ){
@@ -88,65 +88,6 @@ do_execsql_test 210 {
 do_execsql_test 211 {
  SELECT quote(a), quote(lsm1_key), quote(lsm1_value), '|' FROM x1;
 } {'12' X'3132' X'05320000000000000A401FFB42ABE9DB' | '15' X'3135' X'4284C6' | '8' X'38' X'2162616E6A6F1633323105' |}
-do_execsql_test 212 {
-  SELECT quote(a), quote(lsm1_key), quote(lsm1_value) FROM x1 WHERE a='12';
-} {'12' X'3132' X'05320000000000000A401FFB42ABE9DB'}

-#-------------------------------------------------------------------------
-reset_db
-forcedelete testlsm.db
-load_lsm1_vtab db
-do_execsql_test 300 {
-  CREATE VIRTUAL TABLE x1 USING lsm1(testlsm.db,a,TEXT,b,c,d);
-}
-do_eqp_test 310 {
-  SELECT * FROM x1 WHERE a=?
-} {SCAN TABLE x1 VIRTUAL TABLE INDEX 0:}
-
-do_eqp_test 320 {
-  SELECT * FROM x1 WHERE a>?
-} {SCAN TABLE x1 VIRTUAL TABLE INDEX 2:}
-
-do_eqp_test 330 {
-  SELECT * FROM x1 WHERE a<?
-} {SCAN TABLE x1 VIRTUAL TABLE INDEX 3:}
-do_eqp_test 340 {
-  SELECT * FROM x1 WHERE a BETWEEN ? AND ?
-} {SCAN TABLE x1 VIRTUAL TABLE INDEX 1:}
-
-#-------------------------------------------------------------------------
-reset_db
-forcedelete testlsm.db
-load_lsm1_vtab db
-do_execsql_test 400 {
-  CREATE VIRTUAL TABLE x1 USING lsm1(testlsm.db,a,TEXT,b);
-  INSERT INTO x1 VALUES('one', 1);
-  INSERT INTO x1 VALUES('two', 2);
-  INSERT INTO x1 VALUES('three', 3);
-  INSERT INTO x1 VALUES('four', 4);
-  INSERT INTO x1 VALUES('five', 5);
-}
-do_execsql_test 410 {
-  SELECT b FROM x1 WHERE a = 'two'
-} {2}
-do_execsql_test 411 {
-  SELECT b FROM x1 WHERE a = 'one'
-} {1}
-do_execsql_test 412 {
-  SELECT b FROM x1 WHERE a = 'five'
-} {5}
-
-do_execsql_test 420 {
-  SELECT b FROM x1 WHERE a BETWEEN 'one' AND 'three';
-} {1 3}
-do_execsql_test 421 {
-  SELECT b FROM x1 WHERE a BETWEEN 'five' AND 'two';
-} {5 4 1 3 2}
-do_execsql_test 421 {
-  SELECT b FROM x1 WHERE a > 'five';
-} {4 1 3 2}
-do_execsql_test 421 {
-  SELECT b FROM x1 WHERE a <= 'three';
-} {3 1 4 5}

 finish_test
@@ -900,7 +900,6 @@ static int amatchConnect(
    rc = amatchLoadRules(db, pNew, pzErr);
  }
  if( rc==SQLITE_OK ){
-    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
    rc = sqlite3_declare_vtab(db,
           "CREATE TABLE x(word,distance,language,"
           "command HIDDEN,nword HIDDEN)"
@@ -439,7 +439,7 @@ static int apndOpen(
  p = (ApndFile*)pFile;
  memset(p, 0, sizeof(*p));
  pSubFile = ORIGFILE(pFile);
-  pFile->pMethods = &apnd_io_methods;
+  p->base.pMethods = &apnd_io_methods;
  rc = pSubVfs->xOpen(pSubVfs, zName, pSubFile, flags, pOutFlags);
  if( rc ) goto apnd_open_done;
  rc = pSubFile->pMethods->xFileSize(pSubFile, &sz);
@@ -76,7 +76,7 @@ static void readblobFunc(
  sqlite3_blob_close(pBlob);
  if( rc ){
    sqlite3_free(aData);
-    sqlite3_result_error(context, "BLOB read failed", -1);
+    sqlite3_result_error(context, "BLOB write failed", -1);
  }else{
    sqlite3_result_blob(context, aData, nData, sqlite3_free);
  }
@@ -21,18 +21,18 @@
 **    name TEXT,                   -- Name of table or index for this btree.
 **    tbl_name TEXT,               -- Associated table
 **    rootpage INT,                -- The root page of the btree
-**    sql TEXT,                    -- SQL for this btree - from sqlite_schema
+**    sql TEXT,                    -- SQL for this btree - from sqlite_master
 **    hasRowid BOOLEAN,            -- True if the btree has a rowid
-**    nEntry INT,                  -- Estimated number of entries
+**    nEntry INT,                  -- Estimated number of enteries
 **    nPage INT,                   -- Estimated number of pages
 **    depth INT,                   -- Depth of the btree
 **    szPage INT,                  -- Size of each page in bytes
 **    zSchema TEXT HIDDEN          -- The schema to which this btree belongs
 ** );
 **
-** The first 5 fields are taken directly from the sqlite_schema table.
+** The first 5 fields are taken directly from the sqlite_master table.
 ** Considering only the first 5 fields, the only difference between 
-** this virtual table and the sqlite_schema table is that this virtual
+** this virtual table and the sqlite_master table is that this virtual
 ** table omits all entries that have a 0 or NULL rowid - in other words
 ** it omits triggers and views.
 **
@@ -88,7 +88,7 @@ typedef struct BinfoCursor BinfoCursor;
 /* A cursor for the sqlite_btreeinfo table */
 struct BinfoCursor {
  sqlite3_vtab_cursor base;       /* Base class.  Must be first */
-  sqlite3_stmt *pStmt;            /* Query against sqlite_schema */
+  sqlite3_stmt *pStmt;            /* Query against sqlite_master */
  int rc;                         /* Result of previous sqlite_step() call */
  int hasRowid;                   /* hasRowid value.  Negative if unknown. */
  sqlite3_int64 nEntry;           /* nEntry value */
@@ -242,10 +242,10 @@ static int binfoFilter(
    pCsr->zSchema = sqlite3_mprintf("main");
  }
  zSql = sqlite3_mprintf(
-      "SELECT 0, 'table','sqlite_schema','sqlite_schema',1,NULL "
+      "SELECT 0, 'table','sqlite_master','sqlite_master',1,NULL "
      "UNION ALL "
      "SELECT rowid, type, name, tbl_name, rootpage, sql"
-      " FROM \"%w\".sqlite_schema WHERE rootpage>=1",
+      " FROM \"%w\".sqlite_master WHERE rootpage>=1",
       pCsr->zSchema);
  sqlite3_finalize(pCsr->pStmt);
  pCsr->pStmt = 0;
@@ -24,7 +24,7 @@
 **
 **    static int aX[] = { 53, 9, 17, 2231, 4, 99 };
 **    int i = sqlite3_bind_parameter_index(pStmt, "$ptr");
-**    sqlite3_bind_pointer(pStmt, i, aX, "carray", 0);
+**    sqlite3_bind_value(pStmt, i, aX, "carray", 0);
 **
 ** There is an optional third parameter to determine the datatype of
 ** the C-language array.  Allowed values of the third parameter are
@@ -1,797 +0,0 @@
-/*
-** 2020-04-20
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-******************************************************************************
-**
-** This file implements a VFS shim that writes a checksum on each page
-** of an SQLite database file.  When reading pages, the checksum is verified
-** and an error is raised if the checksum is incorrect.
-**
-** COMPILING
-**
-** This extension requires SQLite 3.32.0 or later.  It uses the
-** sqlite3_database_file_object() interface which was added in
-** version 3.32.0, so it will not link with an earlier version of
-** SQLite.
-**
-** To build this extension as a separately loaded shared library or
-** DLL, use compiler command-lines similar to the following:
-**
-**   (linux)    gcc -fPIC -shared cksumvfs.c -o cksumvfs.so
-**   (mac)      clang -fPIC -dynamiclib cksumvfs.c -o cksumvfs.dylib
-**   (windows)  cl cksumvfs.c -link -dll -out:cksumvfs.dll
-**
-** You may want to add additional compiler options, of course,
-** according to the needs of your project.
-**
-** If you want to statically link this extension with your product,
-** then compile it like any other C-language module but add the
-** "-DSQLITE_CKSUMVFS_STATIC" option so that this module knows that
-** it is being statically linked rather than dynamically linked
-**
-** LOADING
-**
-** To load this extension as a shared library, you first have to
-** bring up a dummy SQLite database connection to use as the argument
-** to the sqlite3_load_extension() API call.  Then you invoke the
-** sqlite3_load_extension() API and shutdown the dummy database
-** connection.  All subsequent database connections that are opened
-** will include this extension.  For example:
-**
-**     sqlite3 *db;
-**     sqlite3_open(":memory:", &db);
-**     sqlite3_load_extention(db, "./cksumvfs");
-**     sqlite3_close(db);
-**
-** If this extension is compiled with -DSQLITE_CKSUMVFS_STATIC and
-** statically linked against the application, initialize it using
-** a single API call as follows:
-**
-**     sqlite3_cksumvfs_init();
-**
-** Cksumvfs is a VFS Shim. When loaded, "cksmvfs" becomes the new
-** default VFS and it uses the prior default VFS as the next VFS
-** down in the stack.  This is normally what you want.  However, it
-** complex situations where multiple VFS shims are being loaded,
-** it might be important to ensure that cksumvfs is loaded in the
-** correct order so that it sequences itself into the default VFS
-** Shim stack in the right order.
-**
-** USING
-**
-** Open database connections using the sqlite3_open() or 
-** sqlite3_open_v2() interfaces, as normal.  Ordinary database files
-** (without a checksum) will operate normally.  Databases with 
-** checksums will return an SQLITE_IOERR_DATA error if a page is
-** encountered that contains an invalid checksum.
-**
-** Checksumming only works on databases that have a reserve-bytes
-** value of exactly 8.  The default value for reserve-bytes is 0.
-** Hence, newly created database files will omit the checksum by
-** default.  To create a database that includes a checksum, change
-** the reserve-bytes value to 8 by runing:
-**
-**    int n = 8;
-**    sqlite3_file_control(db, 0, SQLITE_FCNTL_RESERVED_BYTES, &n);
-**
-** If you do this immediately after creating a new database file,
-** before anything else has been written into the file, then that
-** might be all that you need to do.  Otherwise, the API call
-** above should be followed by:
-**
-**    sqlite3_exec(db, "VACUUM", 0, 0, 0);
-**
-** It never hurts to run the VACUUM, even if you don't need it.
-** If the database is in WAL mode, you should shutdown and
-** reopen all database connections before continuing.
-**
-** From the CLI, use the ".filectrl reserve_bytes 8" command, 
-** followed by "VACUUM;".
-**
-** Note that SQLite allows the number of reserve-bytes to be
-** increased but not decreased.  So if a database file already
-** has a reserve-bytes value greater than 8, there is no way to
-** activate checksumming on that database, other than to dump
-** and restore the database file.  Note also that other extensions
-** might also make use of the reserve-bytes.  Checksumming will
-** be incompatible with those other extensions.
-**
-** VERIFICATION OF CHECKSUMS
-**
-** If any checksum is incorrect, the "PRAGMA quick_check" command
-** will find it.  To verify that checksums are actually enabled
-** and running, use the following query:
-**
-**   SELECT count(*), verify_checksum(data)
-**     FROM sqlite_dbpage
-**    GROUP BY 2;
-**
-** There are three possible outputs form the verify_checksum()
-** function: 1, 0, and NULL.  1 is returned if the checksum is
-** correct.  0 is returned if the checksum is incorrect.  NULL
-** is returned if the page is unreadable.  If checksumming is
-** enabled, the read will fail if the checksum is wrong, so the
-** usual result from verify_checksum() on a bad checksum is NULL.
-**
-** If everything is OK, the query above should return a single
-** row where the second column is 1.  Any other result indicates
-** either that there is a checksum error, or checksum validation
-** is disabled.
-**
-** CONTROLLING CHECKSUM VERIFICATION
-**
-** The cksumvfs extension implements a new PRAGMA statement that can
-** be used to disable, re-enable, or query the status of checksum
-** verification:
-**
-**    PRAGMA checksum_verification;          -- query status
-**    PRAGMA checksum_verification=OFF;      -- disable verification
-**    PRAGMA checksum_verification=ON;       -- re-enable verification
-**
-** The "checksum_verification" pragma will return "1" (true) or "0"
-** (false) if checksum verification is enabled or disabled, respectively.
-** "Verification" in this context means the feature that causes
-** SQLITE_IOERR_DATA errors if a checksum mismatch is detected while
-** reading.  Checksums are always kept up-to-date as long as the
-** reserve-bytes value of the database is 8, regardless of the setting
-** of this pragma.  Checksum verification can be disabled (for example)
-** to do forensic analysis of a database that has previously reported
-** a checksum error.
-**
-** The "checksum_verification" pragma will always respond with "0" if
-** the database file does not have a reserve-bytes value of 8.  The
-** pragma will return no rows at all if the cksumvfs extension is
-** not loaded.
-**
-** IMPLEMENTATION NOTES
-**
-** The checksum is stored in the last 8 bytes of each page.  This
-** module only operates if the "bytes of reserved space on each page"
-** value at offset 20 the SQLite database header is exactly 8.  If
-** the reserved-space value is not 8, this module is a no-op.
-*/
-#ifdef SQLITE_CKSUMVFS_STATIC
-# include "sqlite3.h"
-#else
-# include "sqlite3ext.h"
-  SQLITE_EXTENSION_INIT1
-#endif
-#include <string.h>
-#include <assert.h>
-
-
-/*
-** Forward declaration of objects used by this utility
-*/
-typedef struct sqlite3_vfs CksmVfs;
-typedef struct CksmFile CksmFile;
-
-/*
-** Useful datatype abbreviations
-*/
-#if !defined(SQLITE_CORE)
-  typedef unsigned char u8;
-  typedef unsigned int u32;
-#endif
-
-/* Access to a lower-level VFS that (might) implement dynamic loading,
-** access to randomness, etc.
-*/
-#define ORIGVFS(p)  ((sqlite3_vfs*)((p)->pAppData))
-#define ORIGFILE(p) ((sqlite3_file*)(((CksmFile*)(p))+1))
-
-/* An open file */
-struct CksmFile {
-  sqlite3_file base;    /* IO methods */
-  const char *zFName;   /* Original name of the file */
-  char computeCksm;     /* True to compute checksums.
-                        ** Always true if reserve size is 8. */
-  char verifyCksm;      /* True to verify checksums */
-  char isWal;           /* True if processing a WAL file */
-  char inCkpt;          /* Currently doing a checkpoint */
-  CksmFile *pPartner;   /* Ptr from WAL to main-db, or from main-db to WAL */
-};
-
-/*
-** Methods for CksmFile
-*/
-static int cksmClose(sqlite3_file*);
-static int cksmRead(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst);
-static int cksmWrite(sqlite3_file*,const void*,int iAmt, sqlite3_int64 iOfst);
-static int cksmTruncate(sqlite3_file*, sqlite3_int64 size);
-static int cksmSync(sqlite3_file*, int flags);
-static int cksmFileSize(sqlite3_file*, sqlite3_int64 *pSize);
-static int cksmLock(sqlite3_file*, int);
-static int cksmUnlock(sqlite3_file*, int);
-static int cksmCheckReservedLock(sqlite3_file*, int *pResOut);
-static int cksmFileControl(sqlite3_file*, int op, void *pArg);
-static int cksmSectorSize(sqlite3_file*);
-static int cksmDeviceCharacteristics(sqlite3_file*);
-static int cksmShmMap(sqlite3_file*, int iPg, int pgsz, int, void volatile**);
-static int cksmShmLock(sqlite3_file*, int offset, int n, int flags);
-static void cksmShmBarrier(sqlite3_file*);
-static int cksmShmUnmap(sqlite3_file*, int deleteFlag);
-static int cksmFetch(sqlite3_file*, sqlite3_int64 iOfst, int iAmt, void **pp);
-static int cksmUnfetch(sqlite3_file*, sqlite3_int64 iOfst, void *p);
-
-/*
-** Methods for CksmVfs
-*/
-static int cksmOpen(sqlite3_vfs*, const char *, sqlite3_file*, int , int *);
-static int cksmDelete(sqlite3_vfs*, const char *zName, int syncDir);
-static int cksmAccess(sqlite3_vfs*, const char *zName, int flags, int *);
-static int cksmFullPathname(sqlite3_vfs*, const char *zName, int, char *zOut);
-static void *cksmDlOpen(sqlite3_vfs*, const char *zFilename);
-static void cksmDlError(sqlite3_vfs*, int nByte, char *zErrMsg);
-static void (*cksmDlSym(sqlite3_vfs *pVfs, void *p, const char*zSym))(void);
-static void cksmDlClose(sqlite3_vfs*, void*);
-static int cksmRandomness(sqlite3_vfs*, int nByte, char *zOut);
-static int cksmSleep(sqlite3_vfs*, int microseconds);
-static int cksmCurrentTime(sqlite3_vfs*, double*);
-static int cksmGetLastError(sqlite3_vfs*, int, char *);
-static int cksmCurrentTimeInt64(sqlite3_vfs*, sqlite3_int64*);
-static int cksmSetSystemCall(sqlite3_vfs*, const char*,sqlite3_syscall_ptr);
-static sqlite3_syscall_ptr cksmGetSystemCall(sqlite3_vfs*, const char *z);
-static const char *cksmNextSystemCall(sqlite3_vfs*, const char *zName);
-
-static sqlite3_vfs cksm_vfs = {
-  3,                            /* iVersion (set when registered) */
-  0,                            /* szOsFile (set when registered) */
-  1024,                         /* mxPathname */
-  0,                            /* pNext */
-  "cksmvfs",                    /* zName */
-  0,                            /* pAppData (set when registered) */ 
-  cksmOpen,                     /* xOpen */
-  cksmDelete,                   /* xDelete */
-  cksmAccess,                   /* xAccess */
-  cksmFullPathname,             /* xFullPathname */
-  cksmDlOpen,                   /* xDlOpen */
-  cksmDlError,                  /* xDlError */
-  cksmDlSym,                    /* xDlSym */
-  cksmDlClose,                  /* xDlClose */
-  cksmRandomness,               /* xRandomness */
-  cksmSleep,                    /* xSleep */
-  cksmCurrentTime,              /* xCurrentTime */
-  cksmGetLastError,             /* xGetLastError */
-  cksmCurrentTimeInt64,         /* xCurrentTimeInt64 */
-  cksmSetSystemCall,            /* xSetSystemCall */
-  cksmGetSystemCall,            /* xGetSystemCall */
-  cksmNextSystemCall            /* xNextSystemCall */
-};
-
-static const sqlite3_io_methods cksm_io_methods = {
-  3,                              /* iVersion */
-  cksmClose,                      /* xClose */
-  cksmRead,                       /* xRead */
-  cksmWrite,                      /* xWrite */
-  cksmTruncate,                   /* xTruncate */
-  cksmSync,                       /* xSync */
-  cksmFileSize,                   /* xFileSize */
-  cksmLock,                       /* xLock */
-  cksmUnlock,                     /* xUnlock */
-  cksmCheckReservedLock,          /* xCheckReservedLock */
-  cksmFileControl,                /* xFileControl */
-  cksmSectorSize,                 /* xSectorSize */
-  cksmDeviceCharacteristics,      /* xDeviceCharacteristics */
-  cksmShmMap,                     /* xShmMap */
-  cksmShmLock,                    /* xShmLock */
-  cksmShmBarrier,                 /* xShmBarrier */
-  cksmShmUnmap,                   /* xShmUnmap */
-  cksmFetch,                      /* xFetch */
-  cksmUnfetch                     /* xUnfetch */
-};
-
-/* Do byte swapping on a unsigned 32-bit integer */
-#define BYTESWAP32(x) ( \
-    (((x)&0x000000FF)<<24) + (((x)&0x0000FF00)<<8)  \
-  + (((x)&0x00FF0000)>>8)  + (((x)&0xFF000000)>>24) \
-)
-
-/* Compute a checksum on a buffer */
-static void cksmCompute(
-  u8 *a,           /* Content to be checksummed */
-  int nByte,       /* Bytes of content in a[].  Must be a multiple of 8. */
-  u8 *aOut         /* OUT: Final 8-byte checksum value output */
-){
-  u32 s1 = 0, s2 = 0;
-  u32 *aData = (u32*)a;
-  u32 *aEnd = (u32*)&a[nByte];
-  u32 x = 1;
-
-  assert( nByte>=8 );
-  assert( (nByte&0x00000007)==0 );
-  assert( nByte<=65536 );
-
-  if( 1 == *(u8*)&x ){
-    /* Little-endian */
-    do {
-      s1 += *aData++ + s2;
-      s2 += *aData++ + s1;
-    }while( aData<aEnd );
-  }else{
-    /* Big-endian */
-    do {
-      s1 += BYTESWAP32(aData[0]) + s2;
-      s2 += BYTESWAP32(aData[1]) + s1;
-      aData += 2;
-    }while( aData<aEnd );
-    s1 = BYTESWAP32(s1);
-    s2 = BYTESWAP32(s2);
-  }
-  memcpy(aOut, &s1, 4);
-  memcpy(aOut+4, &s2, 4);
-}
-
-/*
-** SQL function:    verify_checksum(BLOB)
-**
-** Return 0 or 1 if the checksum is invalid or valid.  Or return
-** NULL if the input is not a BLOB that is the right size for a
-** database page.
-*/
-static void cksmVerifyFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  int nByte;
-  u8 *data;
-  u8 cksum[8];
-  data = (u8*)sqlite3_value_blob(argv[0]);
-  if( data==0 ) return;
-  if( sqlite3_value_type(argv[0])!=SQLITE_BLOB ) return;
-  nByte = sqlite3_value_bytes(argv[0]);
-  if( nByte<512 || nByte>65536 || (nByte & (nByte-1))!=0 ) return;
-  cksmCompute(data, nByte-8, cksum);
-  sqlite3_result_int(context, memcmp(data+nByte-8,cksum,8)==0);
-}
-
-/*
-** Close a cksm-file.
-*/
-static int cksmClose(sqlite3_file *pFile){
-  CksmFile *p = (CksmFile *)pFile;
-  if( p->pPartner ){
-    assert( p->pPartner->pPartner==p );
-    p->pPartner->pPartner = 0;
-    p->pPartner = 0;
-  }
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xClose(pFile);
-}
-
-/*
-** Set the computeCkSm and verifyCksm flags, if they need to be
-** changed.
-*/
-static void cksmSetFlags(CksmFile *p, int hasCorrectReserveSize){
-  if( hasCorrectReserveSize!=p->computeCksm ){
-    p->computeCksm = p->verifyCksm = hasCorrectReserveSize;
-    if( p->pPartner ){
-      p->pPartner->verifyCksm = hasCorrectReserveSize;
-      p->pPartner->computeCksm = hasCorrectReserveSize;
-    }
-  }
-}
-
-/*
-** Read data from a cksm-file.
-*/
-static int cksmRead(
-  sqlite3_file *pFile, 
-  void *zBuf, 
-  int iAmt, 
-  sqlite_int64 iOfst
-){
-  int rc;
-  CksmFile *p = (CksmFile *)pFile;
-  pFile = ORIGFILE(pFile);
-  rc = pFile->pMethods->xRead(pFile, zBuf, iAmt, iOfst);
-  if( rc==SQLITE_OK ){
-    if( iOfst==0 && iAmt>=100 && memcmp(zBuf,"SQLite format 3",16)==0 ){
-      u8 *d = (u8*)zBuf;
-      char hasCorrectReserveSize = (d[20]==8);
-      cksmSetFlags(p, hasCorrectReserveSize);
-    }
-    /* Verify the checksum if
-    **    (1) the size indicates that we are dealing with a complete
-    **        database page
-    **    (2) checksum verification is enabled
-    **    (3) we are not in the middle of checkpoint
-    */
-    if( iAmt>=512           /* (1) */
-     && p->verifyCksm       /* (2) */
-     && !p->inCkpt          /* (3) */
-    ){
-      u8 cksum[8];
-      cksmCompute((u8*)zBuf, iAmt-8, cksum);
-      if( memcmp((u8*)zBuf+iAmt-8, cksum, 8)!=0 ){
-        sqlite3_log(SQLITE_IOERR_DATA,
-           "checksum fault offset %lld of \"%s\"",
-           iOfst, p->zFName);
-        rc = SQLITE_IOERR_DATA;
-      }
-    }
-  }
-  return rc;
-}
-
-/*
-** Write data to a cksm-file.
-*/
-static int cksmWrite(
-  sqlite3_file *pFile,
-  const void *zBuf,
-  int iAmt,
-  sqlite_int64 iOfst
-){
-  CksmFile *p = (CksmFile *)pFile;
-  pFile = ORIGFILE(pFile);
-  if( iOfst==0 && iAmt>=100 && memcmp(zBuf,"SQLite format 3",16)==0 ){
-    u8 *d = (u8*)zBuf;
-    char hasCorrectReserveSize = (d[20]==8);
-    cksmSetFlags(p, hasCorrectReserveSize);
-  }
-  /* If the write size is appropriate for a database page and if
-  ** checksums where ever enabled, then it will be safe to compute
-  ** the checksums.  The reserve byte size might have increased, but
-  ** it will never decrease.  And because it cannot decrease, the
-  ** checksum will not overwrite anything.
-  */
-  if( iAmt>=512
-   && p->computeCksm
-   && !p->inCkpt
-  ){
-    cksmCompute((u8*)zBuf, iAmt-8, ((u8*)zBuf)+iAmt-8);
-  }
-  return pFile->pMethods->xWrite(pFile, zBuf, iAmt, iOfst);
-}
-
-/*
-** Truncate a cksm-file.
-*/
-static int cksmTruncate(sqlite3_file *pFile, sqlite_int64 size){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xTruncate(pFile, size);
-}
-
-/*
-** Sync a cksm-file.
-*/
-static int cksmSync(sqlite3_file *pFile, int flags){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xSync(pFile, flags);
-}
-
-/*
-** Return the current file-size of a cksm-file.
-*/
-static int cksmFileSize(sqlite3_file *pFile, sqlite_int64 *pSize){
-  CksmFile *p = (CksmFile *)pFile;
-  pFile = ORIGFILE(p);
-  return pFile->pMethods->xFileSize(pFile, pSize);
-}
-
-/*
-** Lock a cksm-file.
-*/
-static int cksmLock(sqlite3_file *pFile, int eLock){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xLock(pFile, eLock);
-}
-
-/*
-** Unlock a cksm-file.
-*/
-static int cksmUnlock(sqlite3_file *pFile, int eLock){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xUnlock(pFile, eLock);
-}
-
-/*
-** Check if another file-handle holds a RESERVED lock on a cksm-file.
-*/
-static int cksmCheckReservedLock(sqlite3_file *pFile, int *pResOut){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xCheckReservedLock(pFile, pResOut);
-}
-
-/*
-** File control method. For custom operations on a cksm-file.
-*/
-static int cksmFileControl(sqlite3_file *pFile, int op, void *pArg){
-  int rc;
-  CksmFile *p = (CksmFile*)pFile;
-  pFile = ORIGFILE(pFile);
-  if( op==SQLITE_FCNTL_PRAGMA ){
-    char **azArg = (char**)pArg;
-    assert( azArg[1]!=0 );
-    if( sqlite3_stricmp(azArg[1],"checksum_verification")==0 ){
-      char *zArg = azArg[2];
-      if( zArg!=0 ){
-        if( (zArg[0]>='1' && zArg[0]<='9')
-         || sqlite3_strlike("enable%",zArg,0)==0
-         || sqlite3_stricmp("yes",zArg)==0
-         || sqlite3_stricmp("on",zArg)==0
-        ){
-          p->verifyCksm = p->computeCksm;
-        }else{
-          p->verifyCksm = 0;
-        }
-        if( p->pPartner ) p->pPartner->verifyCksm = p->verifyCksm;
-      }
-      azArg[0] = sqlite3_mprintf("%d",p->verifyCksm);
-      return SQLITE_OK;
-    }else if( p->computeCksm && azArg[2]!=0
-           && sqlite3_stricmp(azArg[1], "page_size")==0 ){
-      /* Do not allow page size changes on a checksum database */
-      return SQLITE_OK;
-    }
-  }else if( op==SQLITE_FCNTL_CKPT_START || op==SQLITE_FCNTL_CKPT_DONE ){
-    p->inCkpt = op==SQLITE_FCNTL_CKPT_START;
-    if( p->pPartner ) p->pPartner->inCkpt = p->inCkpt;
-  }
-  rc = pFile->pMethods->xFileControl(pFile, op, pArg);
-  if( rc==SQLITE_OK && op==SQLITE_FCNTL_VFSNAME ){
-    *(char**)pArg = sqlite3_mprintf("cksm/%z", *(char**)pArg);
-  }
-  return rc;
-}
-
-/*
-** Return the sector-size in bytes for a cksm-file.
-*/
-static int cksmSectorSize(sqlite3_file *pFile){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xSectorSize(pFile);
-}
-
-/*
-** Return the device characteristic flags supported by a cksm-file.
-*/
-static int cksmDeviceCharacteristics(sqlite3_file *pFile){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xDeviceCharacteristics(pFile);
-}
-
-/* Create a shared memory file mapping */
-static int cksmShmMap(
-  sqlite3_file *pFile,
-  int iPg,
-  int pgsz,
-  int bExtend,
-  void volatile **pp
-){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xShmMap(pFile,iPg,pgsz,bExtend,pp);
-}
-
-/* Perform locking on a shared-memory segment */
-static int cksmShmLock(sqlite3_file *pFile, int offset, int n, int flags){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xShmLock(pFile,offset,n,flags);
-}
-
-/* Memory barrier operation on shared memory */
-static void cksmShmBarrier(sqlite3_file *pFile){
-  pFile = ORIGFILE(pFile);
-  pFile->pMethods->xShmBarrier(pFile);
-}
-
-/* Unmap a shared memory segment */
-static int cksmShmUnmap(sqlite3_file *pFile, int deleteFlag){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xShmUnmap(pFile,deleteFlag);
-}
-
-/* Fetch a page of a memory-mapped file */
-static int cksmFetch(
-  sqlite3_file *pFile,
-  sqlite3_int64 iOfst,
-  int iAmt,
-  void **pp
-){
-  CksmFile *p = (CksmFile *)pFile;
-  if( p->computeCksm ){
-    *pp = 0;
-    return SQLITE_OK;
-  }
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xFetch(pFile, iOfst, iAmt, pp);
-}
-
-/* Release a memory-mapped page */
-static int cksmUnfetch(sqlite3_file *pFile, sqlite3_int64 iOfst, void *pPage){
-  pFile = ORIGFILE(pFile);
-  return pFile->pMethods->xUnfetch(pFile, iOfst, pPage);
-}
-
-/*
-** Open a cksm file handle.
-*/
-static int cksmOpen(
-  sqlite3_vfs *pVfs,
-  const char *zName,
-  sqlite3_file *pFile,
-  int flags,
-  int *pOutFlags
-){
-  CksmFile *p;
-  sqlite3_file *pSubFile;
-  sqlite3_vfs *pSubVfs;
-  int rc;
-  pSubVfs = ORIGVFS(pVfs);
-  if( (flags & (SQLITE_OPEN_MAIN_DB|SQLITE_OPEN_WAL))==0 ){
-    return pSubVfs->xOpen(pSubVfs, zName, pFile, flags, pOutFlags);
-  }
-  p = (CksmFile*)pFile;
-  memset(p, 0, sizeof(*p));
-  pSubFile = ORIGFILE(pFile);
-  pFile->pMethods = &cksm_io_methods;
-  rc = pSubVfs->xOpen(pSubVfs, zName, pSubFile, flags, pOutFlags);
-  if( rc ) goto cksm_open_done;
-  if( flags & SQLITE_OPEN_WAL ){
-    sqlite3_file *pDb = sqlite3_database_file_object(zName);
-    p->pPartner = (CksmFile*)pDb;
-    assert( p->pPartner->pPartner==0 );
-    p->pPartner->pPartner = p;
-    p->isWal = 1;
-    p->computeCksm = p->pPartner->computeCksm;
-  }else{
-    p->isWal = 0;
-    p->computeCksm = 0;
-  }
-  p->zFName = zName;
-cksm_open_done:
-  if( rc ) pFile->pMethods = 0;
-  return rc;
-}
-
-/*
-** All other VFS methods are pass-thrus.
-*/
-static int cksmDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){
-  return ORIGVFS(pVfs)->xDelete(ORIGVFS(pVfs), zPath, dirSync);
-}
-static int cksmAccess(
-  sqlite3_vfs *pVfs, 
-  const char *zPath, 
-  int flags, 
-  int *pResOut
-){
-  return ORIGVFS(pVfs)->xAccess(ORIGVFS(pVfs), zPath, flags, pResOut);
-}
-static int cksmFullPathname(
-  sqlite3_vfs *pVfs, 
-  const char *zPath, 
-  int nOut, 
-  char *zOut
-){
-  return ORIGVFS(pVfs)->xFullPathname(ORIGVFS(pVfs),zPath,nOut,zOut);
-}
-static void *cksmDlOpen(sqlite3_vfs *pVfs, const char *zPath){
-  return ORIGVFS(pVfs)->xDlOpen(ORIGVFS(pVfs), zPath);
-}
-static void cksmDlError(sqlite3_vfs *pVfs, int nByte, char *zErrMsg){
-  ORIGVFS(pVfs)->xDlError(ORIGVFS(pVfs), nByte, zErrMsg);
-}
-static void (*cksmDlSym(sqlite3_vfs *pVfs, void *p, const char *zSym))(void){
-  return ORIGVFS(pVfs)->xDlSym(ORIGVFS(pVfs), p, zSym);
-}
-static void cksmDlClose(sqlite3_vfs *pVfs, void *pHandle){
-  ORIGVFS(pVfs)->xDlClose(ORIGVFS(pVfs), pHandle);
-}
-static int cksmRandomness(sqlite3_vfs *pVfs, int nByte, char *zBufOut){
-  return ORIGVFS(pVfs)->xRandomness(ORIGVFS(pVfs), nByte, zBufOut);
-}
-static int cksmSleep(sqlite3_vfs *pVfs, int nMicro){
-  return ORIGVFS(pVfs)->xSleep(ORIGVFS(pVfs), nMicro);
-}
-static int cksmCurrentTime(sqlite3_vfs *pVfs, double *pTimeOut){
-  return ORIGVFS(pVfs)->xCurrentTime(ORIGVFS(pVfs), pTimeOut);
-}
-static int cksmGetLastError(sqlite3_vfs *pVfs, int a, char *b){
-  return ORIGVFS(pVfs)->xGetLastError(ORIGVFS(pVfs), a, b);
-}
-static int cksmCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *p){
-  return ORIGVFS(pVfs)->xCurrentTimeInt64(ORIGVFS(pVfs), p);
-}
-static int cksmSetSystemCall(
-  sqlite3_vfs *pVfs,
-  const char *zName,
-  sqlite3_syscall_ptr pCall
-){
-  return ORIGVFS(pVfs)->xSetSystemCall(ORIGVFS(pVfs),zName,pCall);
-}
-static sqlite3_syscall_ptr cksmGetSystemCall(
-  sqlite3_vfs *pVfs,
-  const char *zName
-){
-  return ORIGVFS(pVfs)->xGetSystemCall(ORIGVFS(pVfs),zName);
-}
-static const char *cksmNextSystemCall(sqlite3_vfs *pVfs, const char *zName){
-  return ORIGVFS(pVfs)->xNextSystemCall(ORIGVFS(pVfs), zName);
-}
-
-/* Register the verify_checksum() SQL function.
-*/
-static int cksmRegisterFunc(
-  sqlite3 *db, 
-  char **pzErrMsg, 
-  const sqlite3_api_routines *pApi
-){
-  int rc;
-  if( db==0 ) return SQLITE_OK;
-  rc = sqlite3_create_function(db, "verify_checksum", 1,
-                   SQLITE_UTF8|SQLITE_INNOCUOUS|SQLITE_DETERMINISTIC,
-                   0, cksmVerifyFunc, 0, 0);
-  return rc;
-}
-
-/*
-** Register the cksum VFS as the default VFS for the system.
-** Also make arrangements to automatically register the "verify_checksum()"
-** SQL function on each new database connection.
-*/
-static int cksmRegisterVfs(void){
-  int rc = SQLITE_OK;
-  sqlite3_vfs *pOrig;
-  if( sqlite3_vfs_find("cksmvfs")!=0 ) return SQLITE_OK;
-  pOrig = sqlite3_vfs_find(0);
-  cksm_vfs.iVersion = pOrig->iVersion;
-  cksm_vfs.pAppData = pOrig;
-  cksm_vfs.szOsFile = pOrig->szOsFile + sizeof(CksmFile);
-  rc = sqlite3_vfs_register(&cksm_vfs, 1);
-  if( rc==SQLITE_OK ){
-    rc = sqlite3_auto_extension((void(*)(void))cksmRegisterFunc);
-  }
-  return rc;
-}
-
-#if defined(SQLITE_CKSUMVFS_STATIC)
-/* This variant of the initializer runs when the extension is
-** statically linked.
-*/
-int sqlite3_register_cksumvfs(const char *NotUsed){
-  (void)NotUsed;
-  return cksmRegisterVfs();
-}
-#endif /* defined(SQLITE_CKSUMVFS_STATIC */
-
-#if !defined(SQLITE_CKSUMVFS_STATIC)
-/* This variant of the initializer function is used when the
-** extension is shared library to be loaded at run-time.
-*/
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-/* 
-** This routine is called by sqlite3_load_extension() when the
-** extension is first loaded.
-***/
-int sqlite3_cksumvfs_init(
-  sqlite3 *db, 
-  char **pzErrMsg, 
-  const sqlite3_api_routines *pApi
-){
-  int rc;
-  SQLITE_EXTENSION_INIT2(pApi);
-  (void)pzErrMsg; /* not used */
-  rc = cksmRegisterFunc(db, 0, 0);
-  if( rc==SQLITE_OK ){
-    
-  }
-  if( rc==SQLITE_OK ){
-    rc = cksmRegisterVfs();
-  }
-  if( rc==SQLITE_OK ) rc = SQLITE_OK_LOAD_PERMANENTLY;
-  return rc;
-}
-#endif /* !defined(SQLITE_CKSUMVFS_STATIC) */
@@ -118,7 +118,6 @@ static int completionConnect(
 #define COMPLETION_COLUMN_WHOLELINE 2  /* Entire line seen so far */
 #define COMPLETION_COLUMN_PHASE     3  /* ePhase - used for debugging only */

-  sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  rc = sqlite3_declare_vtab(db,
      "CREATE TABLE x("
      "  candidate TEXT,"
@@ -226,7 +225,7 @@ static int completionNext(sqlite3_vtab_cursor *cur){
            const char *zDb = (const char*)sqlite3_column_text(pS2, 1);
            zSql = sqlite3_mprintf(
               "%z%s"
-               "SELECT name FROM \"%w\".sqlite_schema",
+               "SELECT name FROM \"%w\".sqlite_master",
               zSql, zSep, zDb
            );
            if( zSql==0 ) return SQLITE_NOMEM;
@@ -250,7 +249,7 @@ static int completionNext(sqlite3_vtab_cursor *cur){
            const char *zDb = (const char*)sqlite3_column_text(pS2, 1);
            zSql = sqlite3_mprintf(
               "%z%s"
-               "SELECT pti.name FROM \"%w\".sqlite_schema AS sm"
+               "SELECT pti.name FROM \"%w\".sqlite_master AS sm"
                       " JOIN pragma_table_info(sm.name,%Q) AS pti"
               " WHERE sm.type='table'",
               zSql, zSep, zDb, zDb
@@ -119,13 +119,11 @@ int sqlite3_compress_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "compress", 1, 
-                    SQLITE_UTF8 | SQLITE_INNOCUOUS,
-                    0, compressFunc, 0, 0);
+  rc = sqlite3_create_function(db, "compress", 1, SQLITE_UTF8, 0,
+                               compressFunc, 0, 0);
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "uncompress", 1,
-                    SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
-                    0, uncompressFunc, 0, 0);
+    rc = sqlite3_create_function(db, "uncompress", 1, SQLITE_UTF8, 0,
+                                 uncompressFunc, 0, 0);
  }
  return rc;
 }
@@ -632,15 +632,6 @@ static int csvtabConnect(
  for(i=0; i<sizeof(azPValue)/sizeof(azPValue[0]); i++){
    sqlite3_free(azPValue[i]);
  }
-  /* Rationale for DIRECTONLY:
-  ** An attacker who controls a database schema could use this vtab
-  ** to exfiltrate sensitive data from other files in the filesystem.
-  ** And, recommended practice is to put all CSV virtual tables in the
-  ** TEMP namespace, so they should still be usable from within TEMP
-  ** views, so there shouldn't be a serious loss of functionality by
-  ** prohibiting the use of this vtab from persistent triggers and views.
-  */
-  sqlite3_vtab_config(db, SQLITE_VTAB_DIRECTONLY);
  return SQLITE_OK;

 csvtab_connect_oom:
@@ -1,851 +0,0 @@
-/*
-** 2019-04-17
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-******************************************************************************
-**
-** This file contains an implementation of two eponymous virtual tables,
-** "sqlite_dbdata" and "sqlite_dbptr". Both modules require that the
-** "sqlite_dbpage" eponymous virtual table be available.
-**
-** SQLITE_DBDATA:
-**   sqlite_dbdata is used to extract data directly from a database b-tree
-**   page and its associated overflow pages, bypassing the b-tree layer.
-**   The table schema is equivalent to:
-**
-**     CREATE TABLE sqlite_dbdata(
-**       pgno INTEGER,
-**       cell INTEGER,
-**       field INTEGER,
-**       value ANY,
-**       schema TEXT HIDDEN
-**     );
-**
-**   IMPORTANT: THE VIRTUAL TABLE SCHEMA ABOVE IS SUBJECT TO CHANGE. IN THE
-**   FUTURE NEW NON-HIDDEN COLUMNS MAY BE ADDED BETWEEN "value" AND
-**   "schema".
-**
-**   Each page of the database is inspected. If it cannot be interpreted as
-**   a b-tree page, or if it is a b-tree page containing 0 entries, the
-**   sqlite_dbdata table contains no rows for that page.  Otherwise, the
-**   table contains one row for each field in the record associated with
-**   each cell on the page. For intkey b-trees, the key value is stored in
-**   field -1.
-**
-**   For example, for the database:
-**
-**     CREATE TABLE t1(a, b);     -- root page is page 2
-**     INSERT INTO t1(rowid, a, b) VALUES(5, 'v', 'five');
-**     INSERT INTO t1(rowid, a, b) VALUES(10, 'x', 'ten');
-**
-**   the sqlite_dbdata table contains, as well as from entries related to 
-**   page 1, content equivalent to:
-**
-**     INSERT INTO sqlite_dbdata(pgno, cell, field, value) VALUES
-**         (2, 0, -1, 5     ),
-**         (2, 0,  0, 'v'   ),
-**         (2, 0,  1, 'five'),
-**         (2, 1, -1, 10    ),
-**         (2, 1,  0, 'x'   ),
-**         (2, 1,  1, 'ten' );
-**
-**   If database corruption is encountered, this module does not report an
-**   error. Instead, it attempts to extract as much data as possible and
-**   ignores the corruption.
-**
-** SQLITE_DBPTR:
-**   The sqlite_dbptr table has the following schema:
-**
-**     CREATE TABLE sqlite_dbptr(
-**       pgno INTEGER,
-**       child INTEGER,
-**       schema TEXT HIDDEN
-**     );
-**
-**   It contains one entry for each b-tree pointer between a parent and
-**   child page in the database.
-*/
-#if !defined(SQLITEINT_H) 
-#include "sqlite3ext.h"
-
-typedef unsigned char u8;
-
-#endif
-SQLITE_EXTENSION_INIT1
-#include <string.h>
-#include <assert.h>
-
-#define DBDATA_PADDING_BYTES 100 
-
-typedef struct DbdataTable DbdataTable;
-typedef struct DbdataCursor DbdataCursor;
-
-/* Cursor object */
-struct DbdataCursor {
-  sqlite3_vtab_cursor base;       /* Base class.  Must be first */
-  sqlite3_stmt *pStmt;            /* For fetching database pages */
-
-  int iPgno;                      /* Current page number */
-  u8 *aPage;                      /* Buffer containing page */
-  int nPage;                      /* Size of aPage[] in bytes */
-  int nCell;                      /* Number of cells on aPage[] */
-  int iCell;                      /* Current cell number */
-  int bOnePage;                   /* True to stop after one page */
-  int szDb;
-  sqlite3_int64 iRowid;
-
-  /* Only for the sqlite_dbdata table */
-  u8 *pRec;                       /* Buffer containing current record */
-  int nRec;                       /* Size of pRec[] in bytes */
-  int nHdr;                       /* Size of header in bytes */
-  int iField;                     /* Current field number */
-  u8 *pHdrPtr;
-  u8 *pPtr;
-  
-  sqlite3_int64 iIntkey;          /* Integer key value */
-};
-
-/* Table object */
-struct DbdataTable {
-  sqlite3_vtab base;              /* Base class.  Must be first */
-  sqlite3 *db;                    /* The database connection */
-  sqlite3_stmt *pStmt;            /* For fetching database pages */
-  int bPtr;                       /* True for sqlite3_dbptr table */
-};
-
-/* Column and schema definitions for sqlite_dbdata */
-#define DBDATA_COLUMN_PGNO        0
-#define DBDATA_COLUMN_CELL        1
-#define DBDATA_COLUMN_FIELD       2
-#define DBDATA_COLUMN_VALUE       3
-#define DBDATA_COLUMN_SCHEMA      4
-#define DBDATA_SCHEMA             \
-      "CREATE TABLE x("           \
-      "  pgno INTEGER,"           \
-      "  cell INTEGER,"           \
-      "  field INTEGER,"          \
-      "  value ANY,"              \
-      "  schema TEXT HIDDEN"      \
-      ")"
-
-/* Column and schema definitions for sqlite_dbptr */
-#define DBPTR_COLUMN_PGNO         0
-#define DBPTR_COLUMN_CHILD        1
-#define DBPTR_COLUMN_SCHEMA       2
-#define DBPTR_SCHEMA              \
-      "CREATE TABLE x("           \
-      "  pgno INTEGER,"           \
-      "  child INTEGER,"          \
-      "  schema TEXT HIDDEN"      \
-      ")"
-
-/*
-** Connect to an sqlite_dbdata (pAux==0) or sqlite_dbptr (pAux!=0) virtual 
-** table.
-*/
-static int dbdataConnect(
-  sqlite3 *db,
-  void *pAux,
-  int argc, const char *const*argv,
-  sqlite3_vtab **ppVtab,
-  char **pzErr
-){
-  DbdataTable *pTab = 0;
-  int rc = sqlite3_declare_vtab(db, pAux ? DBPTR_SCHEMA : DBDATA_SCHEMA);
-
-  if( rc==SQLITE_OK ){
-    pTab = (DbdataTable*)sqlite3_malloc64(sizeof(DbdataTable));
-    if( pTab==0 ){
-      rc = SQLITE_NOMEM;
-    }else{
-      memset(pTab, 0, sizeof(DbdataTable));
-      pTab->db = db;
-      pTab->bPtr = (pAux!=0);
-    }
-  }
-
-  *ppVtab = (sqlite3_vtab*)pTab;
-  return rc;
-}
-
-/*
-** Disconnect from or destroy a sqlite_dbdata or sqlite_dbptr virtual table.
-*/
-static int dbdataDisconnect(sqlite3_vtab *pVtab){
-  DbdataTable *pTab = (DbdataTable*)pVtab;
-  if( pTab ){
-    sqlite3_finalize(pTab->pStmt);
-    sqlite3_free(pVtab);
-  }
-  return SQLITE_OK;
-}
-
-/*
-** This function interprets two types of constraints:
-**
-**       schema=?
-**       pgno=?
-**
-** If neither are present, idxNum is set to 0. If schema=? is present,
-** the 0x01 bit in idxNum is set. If pgno=? is present, the 0x02 bit
-** in idxNum is set.
-**
-** If both parameters are present, schema is in position 0 and pgno in
-** position 1.
-*/
-static int dbdataBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdx){
-  DbdataTable *pTab = (DbdataTable*)tab;
-  int i;
-  int iSchema = -1;
-  int iPgno = -1;
-  int colSchema = (pTab->bPtr ? DBPTR_COLUMN_SCHEMA : DBDATA_COLUMN_SCHEMA);
-
-  for(i=0; i<pIdx->nConstraint; i++){
-    struct sqlite3_index_constraint *p = &pIdx->aConstraint[i];
-    if( p->op==SQLITE_INDEX_CONSTRAINT_EQ ){
-      if( p->iColumn==colSchema ){
-        if( p->usable==0 ) return SQLITE_CONSTRAINT;
-        iSchema = i;
-      }
-      if( p->iColumn==DBDATA_COLUMN_PGNO && p->usable ){
-        iPgno = i;
-      }
-    }
-  }
-
-  if( iSchema>=0 ){
-    pIdx->aConstraintUsage[iSchema].argvIndex = 1;
-    pIdx->aConstraintUsage[iSchema].omit = 1;
-  }
-  if( iPgno>=0 ){
-    pIdx->aConstraintUsage[iPgno].argvIndex = 1 + (iSchema>=0);
-    pIdx->aConstraintUsage[iPgno].omit = 1;
-    pIdx->estimatedCost = 100;
-    pIdx->estimatedRows =  50;
-
-    if( pTab->bPtr==0 && pIdx->nOrderBy && pIdx->aOrderBy[0].desc==0 ){
-      int iCol = pIdx->aOrderBy[0].iColumn;
-      if( pIdx->nOrderBy==1 ){
-        pIdx->orderByConsumed = (iCol==0 || iCol==1);
-      }else if( pIdx->nOrderBy==2 && pIdx->aOrderBy[1].desc==0 && iCol==0 ){
-        pIdx->orderByConsumed = (pIdx->aOrderBy[1].iColumn==1);
-      }
-    }
-
-  }else{
-    pIdx->estimatedCost = 100000000;
-    pIdx->estimatedRows = 1000000000;
-  }
-  pIdx->idxNum = (iSchema>=0 ? 0x01 : 0x00) | (iPgno>=0 ? 0x02 : 0x00);
-  return SQLITE_OK;
-}
-
-/*
-** Open a new sqlite_dbdata or sqlite_dbptr cursor.
-*/
-static int dbdataOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
-  DbdataCursor *pCsr;
-
-  pCsr = (DbdataCursor*)sqlite3_malloc64(sizeof(DbdataCursor));
-  if( pCsr==0 ){
-    return SQLITE_NOMEM;
-  }else{
-    memset(pCsr, 0, sizeof(DbdataCursor));
-    pCsr->base.pVtab = pVTab;
-  }
-
-  *ppCursor = (sqlite3_vtab_cursor *)pCsr;
-  return SQLITE_OK;
-}
-
-/*
-** Restore a cursor object to the state it was in when first allocated 
-** by dbdataOpen().
-*/
-static void dbdataResetCursor(DbdataCursor *pCsr){
-  DbdataTable *pTab = (DbdataTable*)(pCsr->base.pVtab);
-  if( pTab->pStmt==0 ){
-    pTab->pStmt = pCsr->pStmt;
-  }else{
-    sqlite3_finalize(pCsr->pStmt);
-  }
-  pCsr->pStmt = 0;
-  pCsr->iPgno = 1;
-  pCsr->iCell = 0;
-  pCsr->iField = 0;
-  pCsr->bOnePage = 0;
-  sqlite3_free(pCsr->aPage);
-  sqlite3_free(pCsr->pRec);
-  pCsr->pRec = 0;
-  pCsr->aPage = 0;
-}
-
-/*
-** Close an sqlite_dbdata or sqlite_dbptr cursor.
-*/
-static int dbdataClose(sqlite3_vtab_cursor *pCursor){
-  DbdataCursor *pCsr = (DbdataCursor*)pCursor;
-  dbdataResetCursor(pCsr);
-  sqlite3_free(pCsr);
-  return SQLITE_OK;
-}
-
-/* 
-** Utility methods to decode 16 and 32-bit big-endian unsigned integers. 
-*/
-static unsigned int get_uint16(unsigned char *a){
-  return (a[0]<<8)|a[1];
-}
-static unsigned int get_uint32(unsigned char *a){
-  return ((unsigned int)a[0]<<24)
-       | ((unsigned int)a[1]<<16)
-       | ((unsigned int)a[2]<<8)
-       | ((unsigned int)a[3]);
-}
-
-/*
-** Load page pgno from the database via the sqlite_dbpage virtual table.
-** If successful, set (*ppPage) to point to a buffer containing the page
-** data, (*pnPage) to the size of that buffer in bytes and return
-** SQLITE_OK. In this case it is the responsibility of the caller to
-** eventually free the buffer using sqlite3_free().
-**
-** Or, if an error occurs, set both (*ppPage) and (*pnPage) to 0 and
-** return an SQLite error code.
-*/
-static int dbdataLoadPage(
-  DbdataCursor *pCsr,             /* Cursor object */
-  unsigned int pgno,              /* Page number of page to load */
-  u8 **ppPage,                    /* OUT: pointer to page buffer */
-  int *pnPage                     /* OUT: Size of (*ppPage) in bytes */
-){
-  int rc2;
-  int rc = SQLITE_OK;
-  sqlite3_stmt *pStmt = pCsr->pStmt;
-
-  *ppPage = 0;
-  *pnPage = 0;
-  sqlite3_bind_int64(pStmt, 2, pgno);
-  if( SQLITE_ROW==sqlite3_step(pStmt) ){
-    int nCopy = sqlite3_column_bytes(pStmt, 0);
-    if( nCopy>0 ){
-      u8 *pPage;
-      pPage = (u8*)sqlite3_malloc64(nCopy + DBDATA_PADDING_BYTES);
-      if( pPage==0 ){
-        rc = SQLITE_NOMEM;
-      }else{
-        const u8 *pCopy = sqlite3_column_blob(pStmt, 0);
-        memcpy(pPage, pCopy, nCopy);
-        memset(&pPage[nCopy], 0, DBDATA_PADDING_BYTES);
-      }
-      *ppPage = pPage;
-      *pnPage = nCopy;
-    }
-  }
-  rc2 = sqlite3_reset(pStmt);
-  if( rc==SQLITE_OK ) rc = rc2;
-
-  return rc;
-}
-
-/*
-** Read a varint.  Put the value in *pVal and return the number of bytes.
-*/
-static int dbdataGetVarint(const u8 *z, sqlite3_int64 *pVal){
-  sqlite3_int64 v = 0;
-  int i;
-  for(i=0; i<8; i++){
-    v = (v<<7) + (z[i]&0x7f);
-    if( (z[i]&0x80)==0 ){ *pVal = v; return i+1; }
-  }
-  v = (v<<8) + (z[i]&0xff);
-  *pVal = v;
-  return 9;
-}
-
-/*
-** Return the number of bytes of space used by an SQLite value of type
-** eType.
-*/
-static int dbdataValueBytes(int eType){
-  switch( eType ){
-    case 0: case 8: case 9:
-    case 10: case 11:
-      return 0;
-    case 1:
-      return 1;
-    case 2:
-      return 2;
-    case 3:
-      return 3;
-    case 4:
-      return 4;
-    case 5:
-      return 6;
-    case 6:
-    case 7:
-      return 8;
-    default:
-      if( eType>0 ){
-        return ((eType-12) / 2);
-      }
-      return 0;
-  }
-}
-
-/*
-** Load a value of type eType from buffer pData and use it to set the
-** result of context object pCtx.
-*/
-static void dbdataValue(
-  sqlite3_context *pCtx, 
-  int eType, 
-  u8 *pData,
-  int nData
-){
-  if( eType>=0 && dbdataValueBytes(eType)<=nData ){
-    switch( eType ){
-      case 0: 
-      case 10: 
-      case 11: 
-        sqlite3_result_null(pCtx);
-        break;
-      
-      case 8: 
-        sqlite3_result_int(pCtx, 0);
-        break;
-      case 9:
-        sqlite3_result_int(pCtx, 1);
-        break;
-  
-      case 1: case 2: case 3: case 4: case 5: case 6: case 7: {
-        sqlite3_uint64 v = (signed char)pData[0];
-        pData++;
-        switch( eType ){
-          case 7:
-          case 6:  v = (v<<16) + (pData[0]<<8) + pData[1];  pData += 2;
-          case 5:  v = (v<<16) + (pData[0]<<8) + pData[1];  pData += 2;
-          case 4:  v = (v<<8) + pData[0];  pData++;
-          case 3:  v = (v<<8) + pData[0];  pData++;
-          case 2:  v = (v<<8) + pData[0];  pData++;
-        }
-  
-        if( eType==7 ){
-          double r;
-          memcpy(&r, &v, sizeof(r));
-          sqlite3_result_double(pCtx, r);
-        }else{
-          sqlite3_result_int64(pCtx, (sqlite3_int64)v);
-        }
-        break;
-      }
-  
-      default: {
-        int n = ((eType-12) / 2);
-        if( eType % 2 ){
-          sqlite3_result_text(pCtx, (const char*)pData, n, SQLITE_TRANSIENT);
-        }else{
-          sqlite3_result_blob(pCtx, pData, n, SQLITE_TRANSIENT);
-        }
-      }
-    }
-  }
-}
-
-/*
-** Move an sqlite_dbdata or sqlite_dbptr cursor to the next entry.
-*/
-static int dbdataNext(sqlite3_vtab_cursor *pCursor){
-  DbdataCursor *pCsr = (DbdataCursor*)pCursor;
-  DbdataTable *pTab = (DbdataTable*)pCursor->pVtab;
-
-  pCsr->iRowid++;
-  while( 1 ){
-    int rc;
-    int iOff = (pCsr->iPgno==1 ? 100 : 0);
-    int bNextPage = 0;
-
-    if( pCsr->aPage==0 ){
-      while( 1 ){
-        if( pCsr->bOnePage==0 && pCsr->iPgno>pCsr->szDb ) return SQLITE_OK;
-        rc = dbdataLoadPage(pCsr, pCsr->iPgno, &pCsr->aPage, &pCsr->nPage);
-        if( rc!=SQLITE_OK ) return rc;
-        if( pCsr->aPage ) break;
-        pCsr->iPgno++;
-      }
-      pCsr->iCell = pTab->bPtr ? -2 : 0;
-      pCsr->nCell = get_uint16(&pCsr->aPage[iOff+3]);
-    }
-
-    if( pTab->bPtr ){
-      if( pCsr->aPage[iOff]!=0x02 && pCsr->aPage[iOff]!=0x05 ){
-        pCsr->iCell = pCsr->nCell;
-      }
-      pCsr->iCell++;
-      if( pCsr->iCell>=pCsr->nCell ){
-        sqlite3_free(pCsr->aPage);
-        pCsr->aPage = 0;
-        if( pCsr->bOnePage ) return SQLITE_OK;
-        pCsr->iPgno++;
-      }else{
-        return SQLITE_OK;
-      }
-    }else{
-      /* If there is no record loaded, load it now. */
-      if( pCsr->pRec==0 ){
-        int bHasRowid = 0;
-        int nPointer = 0;
-        sqlite3_int64 nPayload = 0;
-        sqlite3_int64 nHdr = 0;
-        int iHdr;
-        int U, X;
-        int nLocal;
-  
-        switch( pCsr->aPage[iOff] ){
-          case 0x02:
-            nPointer = 4;
-            break;
-          case 0x0a:
-            break;
-          case 0x0d:
-            bHasRowid = 1;
-            break;
-          default:
-            /* This is not a b-tree page with records on it. Continue. */
-            pCsr->iCell = pCsr->nCell;
-            break;
-        }
-
-        if( pCsr->iCell>=pCsr->nCell ){
-          bNextPage = 1;
-        }else{
-  
-          iOff += 8 + nPointer + pCsr->iCell*2;
-          if( iOff>pCsr->nPage ){
-            bNextPage = 1;
-          }else{
-            iOff = get_uint16(&pCsr->aPage[iOff]);
-          }
-    
-          /* For an interior node cell, skip past the child-page number */
-          iOff += nPointer;
-    
-          /* Load the "byte of payload including overflow" field */
-          if( bNextPage || iOff>pCsr->nPage ){
-            bNextPage = 1;
-          }else{
-            iOff += dbdataGetVarint(&pCsr->aPage[iOff], &nPayload);
-          }
-    
-          /* If this is a leaf intkey cell, load the rowid */
-          if( bHasRowid && !bNextPage && iOff<pCsr->nPage ){
-            iOff += dbdataGetVarint(&pCsr->aPage[iOff], &pCsr->iIntkey);
-          }
-    
-          /* Figure out how much data to read from the local page */
-          U = pCsr->nPage;
-          if( bHasRowid ){
-            X = U-35;
-          }else{
-            X = ((U-12)*64/255)-23;
-          }
-          if( nPayload<=X ){
-            nLocal = nPayload;
-          }else{
-            int M, K;
-            M = ((U-12)*32/255)-23;
-            K = M+((nPayload-M)%(U-4));
-            if( K<=X ){
-              nLocal = K;
-            }else{
-              nLocal = M;
-            }
-          }
-
-          if( bNextPage || nLocal+iOff>pCsr->nPage ){
-            bNextPage = 1;
-          }else{
-
-            /* Allocate space for payload. And a bit more to catch small buffer
-            ** overruns caused by attempting to read a varint or similar from 
-            ** near the end of a corrupt record.  */
-            pCsr->pRec = (u8*)sqlite3_malloc64(nPayload+DBDATA_PADDING_BYTES);
-            if( pCsr->pRec==0 ) return SQLITE_NOMEM;
-            memset(pCsr->pRec, 0, nPayload+DBDATA_PADDING_BYTES);
-            pCsr->nRec = nPayload;
-
-            /* Load the nLocal bytes of payload */
-            memcpy(pCsr->pRec, &pCsr->aPage[iOff], nLocal);
-            iOff += nLocal;
-
-            /* Load content from overflow pages */
-            if( nPayload>nLocal ){
-              sqlite3_int64 nRem = nPayload - nLocal;
-              unsigned int pgnoOvfl = get_uint32(&pCsr->aPage[iOff]);
-              while( nRem>0 ){
-                u8 *aOvfl = 0;
-                int nOvfl = 0;
-                int nCopy;
-                rc = dbdataLoadPage(pCsr, pgnoOvfl, &aOvfl, &nOvfl);
-                assert( rc!=SQLITE_OK || aOvfl==0 || nOvfl==pCsr->nPage );
-                if( rc!=SQLITE_OK ) return rc;
-                if( aOvfl==0 ) break;
-
-                nCopy = U-4;
-                if( nCopy>nRem ) nCopy = nRem;
-                memcpy(&pCsr->pRec[nPayload-nRem], &aOvfl[4], nCopy);
-                nRem -= nCopy;
-
-                pgnoOvfl = get_uint32(aOvfl);
-                sqlite3_free(aOvfl);
-              }
-            }
-    
-            iHdr = dbdataGetVarint(pCsr->pRec, &nHdr);
-            pCsr->nHdr = nHdr;
-            pCsr->pHdrPtr = &pCsr->pRec[iHdr];
-            pCsr->pPtr = &pCsr->pRec[pCsr->nHdr];
-            pCsr->iField = (bHasRowid ? -1 : 0);
-          }
-        }
-      }else{
-        pCsr->iField++;
-        if( pCsr->iField>0 ){
-          sqlite3_int64 iType;
-          if( pCsr->pHdrPtr>&pCsr->pRec[pCsr->nRec] ){
-            bNextPage = 1;
-          }else{
-            pCsr->pHdrPtr += dbdataGetVarint(pCsr->pHdrPtr, &iType);
-            pCsr->pPtr += dbdataValueBytes(iType);
-          }
-        }
-      }
-
-      if( bNextPage ){
-        sqlite3_free(pCsr->aPage);
-        sqlite3_free(pCsr->pRec);
-        pCsr->aPage = 0;
-        pCsr->pRec = 0;
-        if( pCsr->bOnePage ) return SQLITE_OK;
-        pCsr->iPgno++;
-      }else{
-        if( pCsr->iField<0 || pCsr->pHdrPtr<&pCsr->pRec[pCsr->nHdr] ){
-          return SQLITE_OK;
-        }
-
-        /* Advance to the next cell. The next iteration of the loop will load
-        ** the record and so on. */
-        sqlite3_free(pCsr->pRec);
-        pCsr->pRec = 0;
-        pCsr->iCell++;
-      }
-    }
-  }
-
-  assert( !"can't get here" );
-  return SQLITE_OK;
-}
-
-/* 
-** Return true if the cursor is at EOF.
-*/
-static int dbdataEof(sqlite3_vtab_cursor *pCursor){
-  DbdataCursor *pCsr = (DbdataCursor*)pCursor;
-  return pCsr->aPage==0;
-}
-
-/* 
-** Determine the size in pages of database zSchema (where zSchema is
-** "main", "temp" or the name of an attached database) and set 
-** pCsr->szDb accordingly. If successful, return SQLITE_OK. Otherwise,
-** an SQLite error code.
-*/
-static int dbdataDbsize(DbdataCursor *pCsr, const char *zSchema){
-  DbdataTable *pTab = (DbdataTable*)pCsr->base.pVtab;
-  char *zSql = 0;
-  int rc, rc2;
-  sqlite3_stmt *pStmt = 0;
-
-  zSql = sqlite3_mprintf("PRAGMA %Q.page_count", zSchema);
-  if( zSql==0 ) return SQLITE_NOMEM;
-  rc = sqlite3_prepare_v2(pTab->db, zSql, -1, &pStmt, 0);
-  sqlite3_free(zSql);
-  if( rc==SQLITE_OK && sqlite3_step(pStmt)==SQLITE_ROW ){
-    pCsr->szDb = sqlite3_column_int(pStmt, 0);
-  }
-  rc2 = sqlite3_finalize(pStmt);
-  if( rc==SQLITE_OK ) rc = rc2;
-  return rc;
-}
-
-/* 
-** xFilter method for sqlite_dbdata and sqlite_dbptr.
-*/
-static int dbdataFilter(
-  sqlite3_vtab_cursor *pCursor, 
-  int idxNum, const char *idxStr,
-  int argc, sqlite3_value **argv
-){
-  DbdataCursor *pCsr = (DbdataCursor*)pCursor;
-  DbdataTable *pTab = (DbdataTable*)pCursor->pVtab;
-  int rc = SQLITE_OK;
-  const char *zSchema = "main";
-
-  dbdataResetCursor(pCsr);
-  assert( pCsr->iPgno==1 );
-  if( idxNum & 0x01 ){
-    zSchema = (const char*)sqlite3_value_text(argv[0]);
-  }
-  if( idxNum & 0x02 ){
-    pCsr->iPgno = sqlite3_value_int(argv[(idxNum & 0x01)]);
-    pCsr->bOnePage = 1;
-  }else{
-    pCsr->nPage = dbdataDbsize(pCsr, zSchema);
-    rc = dbdataDbsize(pCsr, zSchema);
-  }
-
-  if( rc==SQLITE_OK ){
-    if( pTab->pStmt ){
-      pCsr->pStmt = pTab->pStmt;
-      pTab->pStmt = 0;
-    }else{
-      rc = sqlite3_prepare_v2(pTab->db, 
-          "SELECT data FROM sqlite_dbpage(?) WHERE pgno=?", -1,
-          &pCsr->pStmt, 0
-      );
-    }
-  }
-  if( rc==SQLITE_OK ){
-    rc = sqlite3_bind_text(pCsr->pStmt, 1, zSchema, -1, SQLITE_TRANSIENT);
-  }else{
-    pTab->base.zErrMsg = sqlite3_mprintf("%s", sqlite3_errmsg(pTab->db));
-  }
-  if( rc==SQLITE_OK ){
-    rc = dbdataNext(pCursor);
-  }
-  return rc;
-}
-
-/* 
-** Return a column for the sqlite_dbdata or sqlite_dbptr table.
-*/
-static int dbdataColumn(
-  sqlite3_vtab_cursor *pCursor, 
-  sqlite3_context *ctx, 
-  int i
-){
-  DbdataCursor *pCsr = (DbdataCursor*)pCursor;
-  DbdataTable *pTab = (DbdataTable*)pCursor->pVtab;
-  if( pTab->bPtr ){
-    switch( i ){
-      case DBPTR_COLUMN_PGNO:
-        sqlite3_result_int64(ctx, pCsr->iPgno);
-        break;
-      case DBPTR_COLUMN_CHILD: {
-        int iOff = pCsr->iPgno==1 ? 100 : 0;
-        if( pCsr->iCell<0 ){
-          iOff += 8;
-        }else{
-          iOff += 12 + pCsr->iCell*2;
-          if( iOff>pCsr->nPage ) return SQLITE_OK;
-          iOff = get_uint16(&pCsr->aPage[iOff]);
-        }
-        if( iOff<=pCsr->nPage ){
-          sqlite3_result_int64(ctx, get_uint32(&pCsr->aPage[iOff]));
-        }
-        break;
-      }
-    }
-  }else{
-    switch( i ){
-      case DBDATA_COLUMN_PGNO:
-        sqlite3_result_int64(ctx, pCsr->iPgno);
-        break;
-      case DBDATA_COLUMN_CELL:
-        sqlite3_result_int(ctx, pCsr->iCell);
-        break;
-      case DBDATA_COLUMN_FIELD:
-        sqlite3_result_int(ctx, pCsr->iField);
-        break;
-      case DBDATA_COLUMN_VALUE: {
-        if( pCsr->iField<0 ){
-          sqlite3_result_int64(ctx, pCsr->iIntkey);
-        }else{
-          sqlite3_int64 iType;
-          dbdataGetVarint(pCsr->pHdrPtr, &iType);
-          dbdataValue(
-              ctx, iType, pCsr->pPtr, &pCsr->pRec[pCsr->nRec] - pCsr->pPtr
-          );
-        }
-        break;
-      }
-    }
-  }
-  return SQLITE_OK;
-}
-
-/* 
-** Return the rowid for an sqlite_dbdata or sqlite_dptr table.
-*/
-static int dbdataRowid(sqlite3_vtab_cursor *pCursor, sqlite_int64 *pRowid){
-  DbdataCursor *pCsr = (DbdataCursor*)pCursor;
-  *pRowid = pCsr->iRowid;
-  return SQLITE_OK;
-}
-
-
-/*
-** Invoke this routine to register the "sqlite_dbdata" virtual table module
-*/
-static int sqlite3DbdataRegister(sqlite3 *db){
-  static sqlite3_module dbdata_module = {
-    0,                            /* iVersion */
-    0,                            /* xCreate */
-    dbdataConnect,                /* xConnect */
-    dbdataBestIndex,              /* xBestIndex */
-    dbdataDisconnect,             /* xDisconnect */
-    0,                            /* xDestroy */
-    dbdataOpen,                   /* xOpen - open a cursor */
-    dbdataClose,                  /* xClose - close a cursor */
-    dbdataFilter,                 /* xFilter - configure scan constraints */
-    dbdataNext,                   /* xNext - advance a cursor */
-    dbdataEof,                    /* xEof - check for end of scan */
-    dbdataColumn,                 /* xColumn - read data */
-    dbdataRowid,                  /* xRowid - read data */
-    0,                            /* xUpdate */
-    0,                            /* xBegin */
-    0,                            /* xSync */
-    0,                            /* xCommit */
-    0,                            /* xRollback */
-    0,                            /* xFindMethod */
-    0,                            /* xRename */
-    0,                            /* xSavepoint */
-    0,                            /* xRelease */
-    0,                            /* xRollbackTo */
-    0                             /* xShadowName */
-  };
-
-  int rc = sqlite3_create_module(db, "sqlite_dbdata", &dbdata_module, 0);
-  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_module(db, "sqlite_dbptr", &dbdata_module, (void*)1);
-  }
-  return rc;
-}
-
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-int sqlite3_dbdata_init(
-  sqlite3 *db, 
-  char **pzErrMsg, 
-  const sqlite3_api_routines *pApi
-){
-  SQLITE_EXTENSION_INIT2(pApi);
-  return sqlite3DbdataRegister(db);
-}
@@ -395,7 +395,7 @@ static int dump_callback(void *pArg, int nArg, char **azArg, char **azCol){
  if( strcmp(zTable, "sqlite_sequence")==0 ){
    p->xCallback("DELETE FROM sqlite_sequence;\n", p->pArg);
  }else if( sqlite3_strglob("sqlite_stat?", zTable)==0 ){
-    p->xCallback("ANALYZE sqlite_schema;\n", p->pArg);
+    p->xCallback("ANALYZE sqlite_master;\n", p->pArg);
  }else if( strncmp(zTable, "sqlite_", 7)==0 ){
    return 0;
  }else if( strncmp(zSql, "CREATE VIRTUAL TABLE", 20)==0 ){
@@ -404,7 +404,7 @@ static int dump_callback(void *pArg, int nArg, char **azArg, char **azCol){
      p->writableSchema = 1;
    }
    output_formatted(p,
-       "INSERT INTO sqlite_schema(type,name,tbl_name,rootpage,sql)"
+       "INSERT INTO sqlite_master(type,name,tbl_name,rootpage,sql)"
       "VALUES('table','%q','%q',0,'%q');",
       zTable, zTable, zSql);
    return 0;
@@ -646,27 +646,27 @@ int sqlite3_db_dump(
  xCallback("PRAGMA foreign_keys=OFF;\nBEGIN TRANSACTION;\n", pArg);
  if( zTable==0 ){
    run_schema_dump_query(&x,
-      "SELECT name, type, sql FROM \"%w\".sqlite_schema "
+      "SELECT name, type, sql FROM \"%w\".sqlite_master "
      "WHERE sql NOT NULL AND type=='table' AND name!='sqlite_sequence'",
      zSchema
    );
    run_schema_dump_query(&x,
-      "SELECT name, type, sql FROM \"%w\".sqlite_schema "
+      "SELECT name, type, sql FROM \"%w\".sqlite_master "
      "WHERE name=='sqlite_sequence'", zSchema
    );
    output_sql_from_query(&x,
-      "SELECT sql FROM sqlite_schema "
+      "SELECT sql FROM sqlite_master "
      "WHERE sql NOT NULL AND type IN ('index','trigger','view')", 0
    );
  }else{
    run_schema_dump_query(&x,
-      "SELECT name, type, sql FROM \"%w\".sqlite_schema "
+      "SELECT name, type, sql FROM \"%w\".sqlite_master "
      "WHERE tbl_name=%Q COLLATE nocase AND type=='table'"
      "  AND sql NOT NULL",
      zSchema, zTable
    );
    output_sql_from_query(&x,
-      "SELECT sql FROM \"%w\".sqlite_schema "
+      "SELECT sql FROM \"%w\".sqlite_master "
      "WHERE sql NOT NULL"
      "  AND type IN ('index','trigger','view')"
      "  AND tbl_name=%Q COLLATE nocase",
@@ -1,633 +0,0 @@
-/*
-** 2020-06-22
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-******************************************************************************
-**
-** Routines to implement arbitrary-precision decimal math.
-**
-** The focus here is on simplicity and correctness, not performance.
-*/
-#include "sqlite3ext.h"
-SQLITE_EXTENSION_INIT1
-#include <assert.h>
-#include <string.h>
-#include <ctype.h>
-#include <stdlib.h>
-
-/* Mark a function parameter as unused, to suppress nuisance compiler
-** warnings. */
-#ifndef UNUSED_PARAMETER
-# define UNUSED_PARAMETER(X)  (void)(X)
-#endif
-
-
-/* A decimal object */
-typedef struct Decimal Decimal;
-struct Decimal {
-  char sign;        /* 0 for positive, 1 for negative */
-  char oom;         /* True if an OOM is encountered */
-  char isNull;      /* True if holds a NULL rather than a number */
-  char isInit;      /* True upon initialization */
-  int nDigit;       /* Total number of digits */
-  int nFrac;        /* Number of digits to the right of the decimal point */
-  signed char *a;   /* Array of digits.  Most significant first. */
-};
-
-/*
-** Release memory held by a Decimal, but do not free the object itself.
-*/
-static void decimal_clear(Decimal *p){
-  sqlite3_free(p->a);
-}
-
-/*
-** Destroy a Decimal object
-*/
-static void decimal_free(Decimal *p){
-  if( p ){
-    decimal_clear(p);
-    sqlite3_free(p);
-  }
-}
-
-/*
-** Allocate a new Decimal object.  Initialize it to the number given
-** by the input string.
-*/
-static Decimal *decimal_new(
-  sqlite3_context *pCtx,
-  sqlite3_value *pIn,
-  int nAlt,
-  const unsigned char *zAlt
-){
-  Decimal *p;
-  int n, i;
-  const unsigned char *zIn;
-  int iExp = 0;
-  p = sqlite3_malloc( sizeof(*p) );
-  if( p==0 ) goto new_no_mem;
-  p->sign = 0;
-  p->oom = 0;
-  p->isInit = 1;
-  p->isNull = 0;
-  p->nDigit = 0;
-  p->nFrac = 0;
-  if( zAlt ){
-    n = nAlt,
-    zIn = zAlt;
-  }else{
-    if( sqlite3_value_type(pIn)==SQLITE_NULL ){
-      p->a = 0;
-      p->isNull = 1;
-      return p;
-    }
-    n = sqlite3_value_bytes(pIn);
-    zIn = sqlite3_value_text(pIn);
-  }
-  p->a = sqlite3_malloc64( n+1 );
-  if( p->a==0 ) goto new_no_mem;
-  for(i=0; isspace(zIn[i]); i++){}
-  if( zIn[i]=='-' ){
-    p->sign = 1;
-    i++;
-  }else if( zIn[i]=='+' ){
-    i++;
-  }
-  while( i<n && zIn[i]=='0' ) i++;
-  while( i<n ){
-    char c = zIn[i];
-    if( c>='0' && c<='9' ){
-      p->a[p->nDigit++] = c - '0';
-    }else if( c=='.' ){
-      p->nFrac = p->nDigit + 1;
-    }else if( c=='e' || c=='E' ){
-      int j = i+1;
-      int neg = 0;
-      if( j>=n ) break;
-      if( zIn[j]=='-' ){
-        neg = 1;
-        j++;
-      }else if( zIn[j]=='+' ){
-        j++;
-      }
-      while( j<n && iExp<1000000 ){
-        if( zIn[j]>='0' && zIn[j]<='9' ){
-          iExp = iExp*10 + zIn[j] - '0';
-        }
-        j++;
-      }
-      if( neg ) iExp = -iExp;
-      break;
-    }
-    i++;
-  }
-  if( p->nFrac ){
-    p->nFrac = p->nDigit - (p->nFrac - 1);
-  }
-  if( iExp>0 ){
-    if( p->nFrac>0 ){
-      if( iExp<=p->nFrac ){
-        p->nFrac -= iExp;
-        iExp = 0;
-      }else{
-        iExp -= p->nFrac;
-        p->nFrac = 0;
-      }
-    }
-    if( iExp>0 ){   
-      p->a = sqlite3_realloc64(p->a, p->nDigit + iExp + 1 );
-      if( p->a==0 ) goto new_no_mem;
-      memset(p->a+p->nDigit, 0, iExp);
-      p->nDigit += iExp;
-    }
-  }else if( iExp<0 ){
-    int nExtra;
-    iExp = -iExp;
-    nExtra = p->nDigit - p->nFrac - 1;
-    if( nExtra ){
-      if( nExtra>=iExp ){
-        p->nFrac += iExp;
-        iExp  = 0;
-      }else{
-        iExp -= nExtra;
-        p->nFrac = p->nDigit - 1;
-      }
-    }
-    if( iExp>0 ){
-      p->a = sqlite3_realloc64(p->a, p->nDigit + iExp + 1 );
-      if( p->a==0 ) goto new_no_mem;
-      memmove(p->a+iExp, p->a, p->nDigit);
-      memset(p->a, 0, iExp);
-      p->nDigit += iExp;
-      p->nFrac += iExp;
-    }
-  }
-  return p;
-
-new_no_mem:
-  if( pCtx ) sqlite3_result_error_nomem(pCtx);
-  sqlite3_free(p);
-  return 0;
-}
-
-/*
-** Make the given Decimal the result.
-*/
-static void decimal_result(sqlite3_context *pCtx, Decimal *p){
-  char *z;
-  int i, j;
-  int n;
-  if( p==0 || p->oom ){
-    sqlite3_result_error_nomem(pCtx);
-    return;
-  }
-  if( p->isNull ){
-    sqlite3_result_null(pCtx);
-    return;
-  }
-  z = sqlite3_malloc( p->nDigit+4 );
-  if( z==0 ){
-    sqlite3_result_error_nomem(pCtx);
-    return;
-  }
-  i = 0;
-  if( p->nDigit==0 || (p->nDigit==1 && p->a[0]==0) ){
-    p->sign = 0;
-  }
-  if( p->sign ){
-    z[0] = '-';
-    i = 1;
-  }
-  n = p->nDigit - p->nFrac;
-  if( n<=0 ){
-    z[i++] = '0';
-  }
-  j = 0;
-  while( n>1 && p->a[j]==0 ){
-    j++;
-    n--;
-  }
-  while( n>0  ){
-    z[i++] = p->a[j] + '0';
-    j++;
-    n--;
-  }
-  if( p->nFrac ){
-    z[i++] = '.';
-    do{
-      z[i++] = p->a[j] + '0';
-      j++;
-    }while( j<p->nDigit );
-  }
-  z[i] = 0;
-  sqlite3_result_text(pCtx, z, i, sqlite3_free);
-}
-
-/*
-** SQL Function:   decimal(X)
-**
-** Convert input X into decimal and then back into text
-*/
-static void decimalFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  Decimal *p = decimal_new(context, argv[0], 0, 0);
-  UNUSED_PARAMETER(argc);
-  decimal_result(context, p);
-  decimal_free(p);
-}
-
-/*
-** Compare to Decimal objects.  Return negative, 0, or positive if the
-** first object is less than, equal to, or greater than the second.
-**
-** Preconditions for this routine:
-**
-**    pA!=0
-**    pA->isNull==0
-**    pB!=0
-**    pB->isNull==0
-*/
-static int decimal_cmp(const Decimal *pA, const Decimal *pB){
-  int nASig, nBSig, rc, n;
-  if( pA->sign!=pB->sign ){
-    return pA->sign ? -1 : +1;
-  }
-  if( pA->sign ){
-    const Decimal *pTemp = pA;
-    pA = pB;
-    pB = pTemp;
-  }
-  nASig = pA->nDigit - pA->nFrac;
-  nBSig = pB->nDigit - pB->nFrac;
-  if( nASig!=nBSig ){
-    return nASig - nBSig;
-  }
-  n = pA->nDigit;
-  if( n>pB->nDigit ) n = pB->nDigit;
-  rc = memcmp(pA->a, pB->a, n);
-  if( rc==0 ){
-    rc = pA->nDigit - pB->nDigit;
-  }
-  return rc;
-}
-
-/*
-** SQL Function:   decimal_cmp(X, Y)
-**
-** Return negative, zero, or positive if X is less then, equal to, or
-** greater than Y.
-*/
-static void decimalCmpFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  Decimal *pA = 0, *pB = 0;
-  int rc;
-
-  UNUSED_PARAMETER(argc);
-  pA = decimal_new(context, argv[0], 0, 0);
-  if( pA==0 || pA->isNull ) goto cmp_done;
-  pB = decimal_new(context, argv[1], 0, 0);
-  if( pB==0 || pB->isNull ) goto cmp_done;
-  rc = decimal_cmp(pA, pB);
-  if( rc<0 ) rc = -1;
-  else if( rc>0 ) rc = +1;
-  sqlite3_result_int(context, rc);
-cmp_done:
-  decimal_free(pA);
-  decimal_free(pB);
-}
-
-/*
-** Expand the Decimal so that it has a least nDigit digits and nFrac
-** digits to the right of the decimal point.
-*/
-static void decimal_expand(Decimal *p, int nDigit, int nFrac){
-  int nAddSig;
-  int nAddFrac;
-  if( p==0 ) return;
-  nAddFrac = nFrac - p->nFrac;
-  nAddSig = (nDigit - p->nDigit) - nAddFrac;
-  if( nAddFrac==0 && nAddSig==0 ) return;
-  p->a = sqlite3_realloc64(p->a, nDigit+1);
-  if( p->a==0 ){
-    p->oom = 1;
-    return;
-  }
-  if( nAddSig ){
-    memmove(p->a+nAddSig, p->a, p->nDigit);
-    memset(p->a, 0, nAddSig);
-    p->nDigit += nAddSig;
-  }
-  if( nAddFrac ){
-    memset(p->a+p->nDigit, 0, nAddFrac);
-    p->nDigit += nAddFrac;
-    p->nFrac += nAddFrac;
-  }
-}
-
-/*
-** Add the value pB into pA.
-**
-** Both pA and pB might become denormalized by this routine.
-*/
-static void decimal_add(Decimal *pA, Decimal *pB){
-  int nSig, nFrac, nDigit;
-  int i, rc;
-  if( pA==0 ){
-    return;
-  }
-  if( pA->oom || pB==0 || pB->oom ){
-    pA->oom = 1;
-    return;
-  }
-  if( pA->isNull || pB->isNull ){
-    pA->isNull = 1;
-    return;
-  }
-  nSig = pA->nDigit - pA->nFrac;
-  if( nSig && pA->a[0]==0 ) nSig--;
-  if( nSig<pB->nDigit-pB->nFrac ){
-    nSig = pB->nDigit - pB->nFrac;
-  }
-  nFrac = pA->nFrac;
-  if( nFrac<pB->nFrac ) nFrac = pB->nFrac;
-  nDigit = nSig + nFrac + 1;
-  decimal_expand(pA, nDigit, nFrac);
-  decimal_expand(pB, nDigit, nFrac);
-  if( pA->oom || pB->oom ){
-    pA->oom = 1;
-  }else{
-    if( pA->sign==pB->sign ){
-      int carry = 0;
-      for(i=nDigit-1; i>=0; i--){
-        int x = pA->a[i] + pB->a[i] + carry;
-        if( x>=10 ){
-          carry = 1;
-          pA->a[i] = x - 10;
-        }else{
-          carry = 0;
-          pA->a[i] = x;
-        }
-      }
-    }else{
-      signed char *aA, *aB;
-      int borrow = 0;
-      rc = memcmp(pA->a, pB->a, nDigit);
-      if( rc<0 ){
-        aA = pB->a;
-        aB = pA->a;
-        pA->sign = !pA->sign;
-      }else{
-        aA = pA->a;
-        aB = pB->a;
-      }
-      for(i=nDigit-1; i>=0; i--){
-        int x = aA[i] - aB[i] - borrow;
-        if( x<0 ){
-          pA->a[i] = x+10;
-          borrow = 1;
-        }else{
-          pA->a[i] = x;
-          borrow = 0;
-        }
-      }
-    }
-  }
-}
-
-/*
-** Compare text in decimal order.
-*/
-static int decimalCollFunc(
-  void *notUsed,
-  int nKey1, const void *pKey1,
-  int nKey2, const void *pKey2
-){
-  const unsigned char *zA = (const unsigned char*)pKey1;
-  const unsigned char *zB = (const unsigned char*)pKey2;
-  Decimal *pA = decimal_new(0, 0, nKey1, zA);
-  Decimal *pB = decimal_new(0, 0, nKey2, zB);
-  int rc;
-  UNUSED_PARAMETER(notUsed);
-  if( pA==0 || pB==0 ){
-    rc = 0;
-  }else{
-    rc = decimal_cmp(pA, pB);
-  }
-  decimal_free(pA);
-  decimal_free(pB);
-  return rc;
-}
-
-
-/*
-** SQL Function:   decimal_add(X, Y)
-**                 decimal_sub(X, Y)
-**
-** Return the sum or difference of X and Y.
-*/
-static void decimalAddFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  Decimal *pA = decimal_new(context, argv[0], 0, 0);
-  Decimal *pB = decimal_new(context, argv[1], 0, 0);
-  UNUSED_PARAMETER(argc);
-  decimal_add(pA, pB);
-  decimal_result(context, pA);
-  decimal_free(pA);
-  decimal_free(pB);
-}
-static void decimalSubFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  Decimal *pA = decimal_new(context, argv[0], 0, 0);
-  Decimal *pB = decimal_new(context, argv[1], 0, 0);
-  UNUSED_PARAMETER(argc);
-  if( pB==0 ) return;
-  pB->sign = !pB->sign;
-  decimal_add(pA, pB);
-  decimal_result(context, pA);
-  decimal_free(pA);
-  decimal_free(pB);
-}
-
-/* Aggregate funcion:   decimal_sum(X)
-**
-** Works like sum() except that it uses decimal arithmetic for unlimited
-** precision.
-*/
-static void decimalSumStep(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  Decimal *p;
-  Decimal *pArg;
-  UNUSED_PARAMETER(argc);
-  p = sqlite3_aggregate_context(context, sizeof(*p));
-  if( p==0 ) return;
-  if( !p->isInit ){
-    p->isInit = 1;
-    p->a = sqlite3_malloc(2);
-    if( p->a==0 ){
-      p->oom = 1;
-    }else{
-      p->a[0] = 0;
-    }
-    p->nDigit = 1;
-    p->nFrac = 0;
-  }
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
-  pArg = decimal_new(context, argv[0], 0, 0);
-  decimal_add(p, pArg);
-  decimal_free(pArg);
-}
-static void decimalSumInverse(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  Decimal *p;
-  Decimal *pArg;
-  UNUSED_PARAMETER(argc);
-  p = sqlite3_aggregate_context(context, sizeof(*p));
-  if( p==0 ) return;
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
-  pArg = decimal_new(context, argv[0], 0, 0);
-  if( pArg ) pArg->sign = !pArg->sign;
-  decimal_add(p, pArg);
-  decimal_free(pArg);
-}
-static void decimalSumValue(sqlite3_context *context){
-  Decimal *p = sqlite3_aggregate_context(context, 0);
-  if( p==0 ) return;
-  decimal_result(context, p);
-}
-static void decimalSumFinalize(sqlite3_context *context){
-  Decimal *p = sqlite3_aggregate_context(context, 0);
-  if( p==0 ) return;
-  decimal_result(context, p);
-  decimal_clear(p);
-}
-
-/*
-** SQL Function:   decimal_mul(X, Y)
-**
-** Return the product of X and Y.
-**
-** All significant digits after the decimal point are retained.
-** Trailing zeros after the decimal point are omitted as long as
-** the number of digits after the decimal point is no less than
-** either the number of digits in either input.
-*/
-static void decimalMulFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  Decimal *pA = decimal_new(context, argv[0], 0, 0);
-  Decimal *pB = decimal_new(context, argv[1], 0, 0);
-  signed char *acc = 0;
-  int i, j, k;
-  int minFrac;
-  UNUSED_PARAMETER(argc);
-  if( pA==0 || pA->oom || pA->isNull
-   || pB==0 || pB->oom || pB->isNull 
-  ){
-    goto mul_end;
-  }
-  acc = sqlite3_malloc64( pA->nDigit + pB->nDigit + 2 );
-  if( acc==0 ){
-    sqlite3_result_error_nomem(context);
-    goto mul_end;
-  }
-  memset(acc, 0, pA->nDigit + pB->nDigit + 2);
-  minFrac = pA->nFrac;
-  if( pB->nFrac<minFrac ) minFrac = pB->nFrac;
-  for(i=pA->nDigit-1; i>=0; i--){
-    signed char f = pA->a[i];
-    int carry = 0, x;
-    for(j=pB->nDigit-1, k=i+j+3; j>=0; j--, k--){
-      x = acc[k] + f*pB->a[j] + carry;
-      acc[k] = x%10;
-      carry = x/10;
-    }
-    x = acc[k] + carry;
-    acc[k] = x%10;
-    acc[k-1] += x/10;
-  }
-  sqlite3_free(pA->a);
-  pA->a = acc;
-  acc = 0;
-  pA->nDigit += pB->nDigit + 2;
-  pA->nFrac += pB->nFrac;
-  pA->sign ^= pB->sign;
-  while( pA->nFrac>minFrac && pA->a[pA->nDigit-1]==0 ){
-    pA->nFrac--;
-    pA->nDigit--;
-  }
-  decimal_result(context, pA);
-
-mul_end:
-  sqlite3_free(acc);
-  decimal_free(pA);
-  decimal_free(pB);
-}
-
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-int sqlite3_decimal_init(
-  sqlite3 *db, 
-  char **pzErrMsg, 
-  const sqlite3_api_routines *pApi
-){
-  int rc = SQLITE_OK;
-  SQLITE_EXTENSION_INIT2(pApi);
-  static const struct {
-    const char *zFuncName;
-    int nArg;
-    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
-  } aFunc[] = {
-    { "decimal",       1,   decimalFunc        },
-    { "decimal_cmp",   2,   decimalCmpFunc     },
-    { "decimal_add",   2,   decimalAddFunc     },
-    { "decimal_sub",   2,   decimalSubFunc     },
-    { "decimal_mul",   2,   decimalMulFunc     },
-  };
-  unsigned int i;
-  (void)pzErrMsg;  /* Unused parameter */
-
-  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
-    rc = sqlite3_create_function(db, aFunc[i].zFuncName, aFunc[i].nArg,
-                   SQLITE_UTF8|SQLITE_INNOCUOUS|SQLITE_DETERMINISTIC,
-                   0, aFunc[i].xFunc, 0, 0);
-  }
-  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_window_function(db, "decimal_sum", 1,
-                   SQLITE_UTF8|SQLITE_INNOCUOUS|SQLITE_DETERMINISTIC, 0,
-                   decimalSumStep, decimalSumFinalize,
-                   decimalSumValue, decimalSumInverse, 0);
-  }
-  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_collation(db, "decimal", SQLITE_UTF8,
-                                  0, decimalCollFunc);
-  }
-  return rc;
-}
@@ -113,12 +113,10 @@ int sqlite3_eval_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "eval", 1, 
-                               SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
+  rc = sqlite3_create_function(db, "eval", 1, SQLITE_UTF8, 0,
                               sqlEvalFunc, 0, 0);
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "eval", 2,
-                                 SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
+    rc = sqlite3_create_function(db, "eval", 2, SQLITE_UTF8, 0,
                                 sqlEvalFunc, 0, 0);
  }
  return rc;
@@ -16,7 +16,7 @@
 ** Usage example:
 **
 **     .load ./explain
-**     SELECT p2 FROM explain('SELECT * FROM sqlite_schema')
+**     SELECT p2 FROM explain('SELECT * FROM sqlite_master')
 **      WHERE opcode='OpenRead';
 **
 ** This module was originally written to help simplify SQLite testing,
@@ -394,7 +394,6 @@ static int writeFile(

  if( mtime>=0 ){
 #if defined(_WIN32)
-#if !SQLITE_OS_WINRT
    /* Windows */
    FILETIME lastAccess;
    FILETIME lastWrite;
@@ -425,7 +424,6 @@ static int writeFile(
    }else{
      return 1;
    }
-#endif
 #elif defined(AT_FDCWD) && 0 /* utimensat() is not universally available */
    /* Recent unix */
    struct timespec times[2];
@@ -587,7 +585,6 @@ static int fsdirConnect(
    pNew = (fsdir_tab*)sqlite3_malloc( sizeof(*pNew) );
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
-    sqlite3_vtab_config(db, SQLITE_VTAB_DIRECTONLY);
  }
  *ppVtab = (sqlite3_vtab*)pNew;
  return rc;
@@ -981,12 +978,10 @@ int sqlite3_fileio_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "readfile", 1, 
-                               SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
+  rc = sqlite3_create_function(db, "readfile", 1, SQLITE_UTF8, 0,
                               readfileFunc, 0, 0);
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "writefile", -1,
-                                 SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
+    rc = sqlite3_create_function(db, "writefile", -1, SQLITE_UTF8, 0,
                                 writefileFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
@@ -36,7 +36,6 @@
 #include "sqlite3ext.h"
 SQLITE_EXTENSION_INIT1

-#ifndef SQLITE_AMALGAMATION
 /*
 ** The "u32" type must be an unsigned 32-bit integer.  Adjust this
 */
@@ -48,8 +47,6 @@ typedef unsigned int u32;
 typedef short int s16;
 typedef unsigned short int u16;

-#endif /* SQLITE_AMALGAMATION */
-

 /*
 ** The width of a hash window in bytes.  The algorithm only works if this
@@ -822,7 +819,6 @@ static int deltaparsevtabConnect(
    *ppVtab = (sqlite3_vtab*)pNew;
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
-    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  }
  return rc;
 }
@@ -853,7 +849,6 @@ static int deltaparsevtabOpen(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
 */
 static int deltaparsevtabClose(sqlite3_vtab_cursor *cur){
  deltaparsevtab_cursor *pCur = (deltaparsevtab_cursor*)cur;
-  sqlite3_free(pCur->aDelta);
  sqlite3_free(pCur);
  return SQLITE_OK;
 }
@@ -1071,18 +1066,17 @@ int sqlite3_fossildelta_init(
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
 ){
-  static const int enc = SQLITE_UTF8|SQLITE_INNOCUOUS;
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "delta_create", 2, enc, 0,
+  rc = sqlite3_create_function(db, "delta_create", 2, SQLITE_UTF8, 0,
                               deltaCreateFunc, 0, 0);
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "delta_apply", 2, enc, 0,
+    rc = sqlite3_create_function(db, "delta_apply", 2, SQLITE_UTF8, 0,
                                 deltaApplyFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "delta_output_size", 1, enc, 0,
+    rc = sqlite3_create_function(db, "delta_output_size", 1, SQLITE_UTF8, 0,
                                 deltaOutputSizeFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
@@ -540,8 +540,6 @@ static int fuzzerConnect(
      if( rc!=SQLITE_OK ){
        fuzzerDisconnect((sqlite3_vtab *)pNew);
        pNew = 0;
-      }else{
-        sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
      }
    }
  }
@@ -26,76 +26,16 @@
 **
 ** Examples:
 **
-**     ieee754(2.0)             ->     'ieee754(2,0)'
-**     ieee754(45.25)           ->     'ieee754(181,-2)'
-**     ieee754(2, 0)            ->     2.0
-**     ieee754(181, -2)         ->     45.25
-**
-** Two additional functions break apart the one-argument ieee754()
-** result into separate integer values:
-**
-**     ieee754_mantissa(45.25)  ->     181
-**     ieee754_exponent(45.25)  ->     -2
-**
-** These functions convert binary64 numbers into blobs and back again.
-**
-**     ieee754_from_blob(x'3ff0000000000000')  ->  1.0
-**     ieee754_to_blob(1.0)                    ->  x'3ff0000000000000'
-**
-** In all single-argument functions, if the argument is an 8-byte blob
-** then that blob is interpreted as a big-endian binary64 value.
-**
-**
-** EXACT DECIMAL REPRESENTATION OF BINARY64 VALUES
-** -----------------------------------------------
-**
-** This extension in combination with the separate 'decimal' extension
-** can be used to compute the exact decimal representation of binary64
-** values.  To begin, first compute a table of exponent values:
-**
-**    CREATE TABLE pow2(x INTEGER PRIMARY KEY, v TEXT);
-**    WITH RECURSIVE c(x,v) AS (
-**      VALUES(0,'1')
-**      UNION ALL
-**      SELECT x+1, decimal_mul(v,'2') FROM c WHERE x+1<=971
-**    ) INSERT INTO pow2(x,v) SELECT x, v FROM c;
-**    WITH RECURSIVE c(x,v) AS (
-**      VALUES(-1,'0.5')
-**      UNION ALL
-**      SELECT x-1, decimal_mul(v,'0.5') FROM c WHERE x-1>=-1075
-**    ) INSERT INTO pow2(x,v) SELECT x, v FROM c;
-**
-** Then, to compute the exact decimal representation of a floating
-** point value (the value 47.49 is used in the example) do:
-**
-**    WITH c(n) AS (VALUES(47.49))
-**          ---------------^^^^^---- Replace with whatever you want
-**    SELECT decimal_mul(ieee754_mantissa(c.n),pow2.v)
-**      FROM pow2, c WHERE pow2.x=ieee754_exponent(c.n);
-**
-** Here is a query to show various boundry values for the binary64
-** number format:
-**
-**    WITH c(name,bin) AS (VALUES
-**       ('minimum positive value',        x'0000000000000001'),
-**       ('maximum subnormal value',       x'000fffffffffffff'),
-**       ('mininum positive nornal value', x'0010000000000000'),
-**       ('maximum value',                 x'7fefffffffffffff'))
-**    SELECT c.name, decimal_mul(ieee754_mantissa(c.bin),pow2.v)
-**      FROM pow2, c WHERE pow2.x=ieee754_exponent(c.bin);
-**
+**     ieee754(2.0)       ->     'ieee754(2,0)'
+**     ieee754(45.25)     ->     'ieee754(181,-2)'
+**     ieee754(2, 0)      ->     2.0
+**     ieee754(181, -2)   ->     45.25
 */
 #include "sqlite3ext.h"
 SQLITE_EXTENSION_INIT1
 #include <assert.h>
 #include <string.h>

-/* Mark a function parameter as unused, to suppress nuisance compiler
-** warnings. */
-#ifndef UNUSED_PARAMETER
-# define UNUSED_PARAMETER(X)  (void)(X)
-#endif
-
 /*
 ** Implementation of the ieee754() function
 */
@@ -111,19 +51,8 @@ static void ieee754func(
    int isNeg;
    char zResult[100];
    assert( sizeof(m)==sizeof(r) );
-    if( sqlite3_value_type(argv[0])==SQLITE_BLOB
-     && sqlite3_value_bytes(argv[0])==sizeof(r)
-    ){
-      const unsigned char *x = sqlite3_value_blob(argv[0]);
-      unsigned int i;
-      sqlite3_uint64 v = 0;
-      for(i=0; i<sizeof(r); i++){
-        v = (v<<8) | x[i];
-      }
-      memcpy(&r, &v, sizeof(r));
-    }else{
-      r = sqlite3_value_double(argv[0]);
-    }
+    if( sqlite3_value_type(argv[0])!=SQLITE_FLOAT ) return;
+    r = sqlite3_value_double(argv[0]);
    if( r<0.0 ){
      isNeg = 1;
      r = -r;
@@ -137,31 +66,17 @@ static void ieee754func(
    }else{
      e = a>>52;
      m = a & ((((sqlite3_int64)1)<<52)-1);
-      if( e==0 ){
-        m <<= 1;
-      }else{
-        m |= ((sqlite3_int64)1)<<52;
-      }
+      m |= ((sqlite3_int64)1)<<52;
      while( e<1075 && m>0 && (m&1)==0 ){
        m >>= 1;
        e++;
      }
      if( isNeg ) m = -m;
    }
-    switch( *(int*)sqlite3_user_data(context) ){
-      case 0:
-        sqlite3_snprintf(sizeof(zResult), zResult, "ieee754(%lld,%d)",
-                         m, e-1075);
-        sqlite3_result_text(context, zResult, -1, SQLITE_TRANSIENT);
-        break;
-      case 1:
-        sqlite3_result_int64(context, m);
-        break;
-      case 2:
-        sqlite3_result_int(context, e-1075);
-        break;
-    }
-  }else{
+    sqlite3_snprintf(sizeof(zResult), zResult, "ieee754(%lld,%d)",
+                     m, e-1075);
+    sqlite3_result_text(context, zResult, -1, SQLITE_TRANSIENT);
+  }else if( argc==2 ){
    sqlite3_int64 m, e, a;
    double r;
    int isNeg = 0;
@@ -171,7 +86,7 @@ static void ieee754func(
      isNeg = 1;
      m = -m;
      if( m<0 ) return;
-    }else if( m==0 && e>-1000 && e<1000 ){
+    }else if( m==0 && e>1000 && e<1000 ){
      sqlite3_result_double(context, 0.0);
      return;
    }
@@ -184,13 +99,8 @@ static void ieee754func(
      e--;
    }
    e += 1075;
-    if( e<=0 ){
-      /* Subnormal */
-      m >>= 1-e;
-      e = 0;
-    }else if( e>0x7ff ){
-      e = 0x7ff;
-    }
+    if( e<0 ) e = m = 0;
+    if( e>0x7ff ) e = 0x7ff;
    a = m & ((((sqlite3_int64)1)<<52)-1);
    a |= e<<52;
    if( isNeg ) a |= ((sqlite3_uint64)1)<<63;
@@ -199,51 +109,6 @@ static void ieee754func(
  }
 }

-/*
-** Functions to convert between blobs and floats.
-*/
-static void ieee754func_from_blob(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  UNUSED_PARAMETER(argc);
-  if( sqlite3_value_type(argv[0])==SQLITE_BLOB
-   && sqlite3_value_bytes(argv[0])==sizeof(double)
-  ){
-    double r;
-    const unsigned char *x = sqlite3_value_blob(argv[0]);
-    unsigned int i;
-    sqlite3_uint64 v = 0;
-    for(i=0; i<sizeof(r); i++){
-      v = (v<<8) | x[i];
-    }
-    memcpy(&r, &v, sizeof(r));
-    sqlite3_result_double(context, r);
-  }
-}
-static void ieee754func_to_blob(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  UNUSED_PARAMETER(argc);
-  if( sqlite3_value_type(argv[0])==SQLITE_FLOAT
-   || sqlite3_value_type(argv[0])==SQLITE_INTEGER
-  ){
-    double r = sqlite3_value_double(argv[0]);
-    sqlite3_uint64 v;
-    unsigned char a[sizeof(r)];
-    unsigned int i;
-    memcpy(&v, &r, sizeof(r));
-    for(i=1; i<=sizeof(r); i++){
-      a[sizeof(r)-i] = v&0xff;
-      v >>= 8;
-    }
-    sqlite3_result_blob(context, a, sizeof(r), SQLITE_TRANSIENT);
-  }
-}
-

 #ifdef _WIN32
 __declspec(dllexport)
@@ -253,29 +118,14 @@ int sqlite3_ieee_init(
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
 ){
-  static const struct {
-    char *zFName;
-    int nArg;
-    int iAux;
-    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
-  } aFunc[] = {
-    { "ieee754",           1,   0, ieee754func },
-    { "ieee754",           2,   0, ieee754func },
-    { "ieee754_mantissa",  1,   1, ieee754func },
-    { "ieee754_exponent",  1,   2, ieee754func },
-    { "ieee754_to_blob",   1,   0, ieee754func_to_blob },
-    { "ieee754_from_blob", 1,   0, ieee754func_from_blob },
-
-  };
-  unsigned int i;
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
-    rc = sqlite3_create_function(db, aFunc[i].zFName, aFunc[i].nArg,	
-                               SQLITE_UTF8|SQLITE_INNOCUOUS,
-                               (void*)&aFunc[i].iAux,
-                               aFunc[i].xFunc, 0, 0);
+  rc = sqlite3_create_function(db, "ieee754", 1, SQLITE_UTF8, 0,
+                               ieee754func, 0, 0);
+  if( rc==SQLITE_OK ){
+    rc = sqlite3_create_function(db, "ieee754", 2, SQLITE_UTF8, 0,
+                                 ieee754func, 0, 0);
  }
  return rc;
 }
@@ -254,7 +254,6 @@ static int jsonGrow(JsonString *p, u32 N){
 /* Append N bytes from zIn onto the end of the JsonString string.
 */
 static void jsonAppendRaw(JsonString *p, const char *zIn, u32 N){
-  if( N==0 ) return;
  if( (N+p->nUsed >= p->nAlloc) && jsonGrow(p,N)!=0 ) return;
  memcpy(p->zBuf+p->nUsed, zIn, N);
  p->nUsed += N;
@@ -523,37 +522,6 @@ static void jsonReturnJson(
  sqlite3_result_subtype(pCtx, JSON_SUBTYPE);
 }

-/*
-** Translate a single byte of Hex into an integer.
-** This routine only works if h really is a valid hexadecimal
-** character:  0..9a..fA..F
-*/
-static u8 jsonHexToInt(int h){
-  assert( (h>='0' && h<='9') ||  (h>='a' && h<='f') ||  (h>='A' && h<='F') );
-#ifdef SQLITE_EBCDIC
-  h += 9*(1&~(h>>4));
-#else
-  h += 9*(1&(h>>6));
-#endif
-  return (u8)(h & 0xf);
-}
-
-/*
-** Convert a 4-byte hex string into an integer
-*/
-static u32 jsonHexToInt4(const char *z){
-  u32 v;
-  assert( safe_isxdigit(z[0]) );
-  assert( safe_isxdigit(z[1]) );
-  assert( safe_isxdigit(z[2]) );
-  assert( safe_isxdigit(z[3]) );
-  v = (jsonHexToInt(z[0])<<12)
-    + (jsonHexToInt(z[1])<<8)
-    + (jsonHexToInt(z[2])<<4)
-    + jsonHexToInt(z[3]);
-  return v;
-}
-
 /*
 ** Make the JsonNode the return value of the function.
 */
@@ -647,8 +615,15 @@ static void jsonReturn(
          }else{
            c = z[++i];
            if( c=='u' ){
-              u32 v = jsonHexToInt4(z+i+1);
-              i += 4;
+              u32 v = 0, k;
+              for(k=0; k<4; i++, k++){
+                assert( i<n-2 );
+                c = z[i+1];
+                assert( safe_isxdigit(c) );
+                if( c<='9' ) v = v*16 + c - '0';
+                else if( c<='F' ) v = v*16 + c - 'A' + 10;
+                else v = v*16 + c - 'a' + 10;
+              }
              if( v==0 ) break;
              if( v<=0x7f ){
                zOut[j++] = (char)v;
@@ -656,25 +631,9 @@ static void jsonReturn(
                zOut[j++] = (char)(0xc0 | (v>>6));
                zOut[j++] = 0x80 | (v&0x3f);
              }else{
-                u32 vlo;
-                if( (v&0xfc00)==0xd800
-                  && i<n-6
-                  && z[i+1]=='\\'
-                  && z[i+2]=='u'
-                  && ((vlo = jsonHexToInt4(z+i+3))&0xfc00)==0xdc00
-                ){
-                  /* We have a surrogate pair */
-                  v = ((v&0x3ff)<<10) + (vlo&0x3ff) + 0x10000;
-                  i += 6;
-                  zOut[j++] = 0xf0 | (v>>18);
-                  zOut[j++] = 0x80 | ((v>>12)&0x3f);
-                  zOut[j++] = 0x80 | ((v>>6)&0x3f);
-                  zOut[j++] = 0x80 | (v&0x3f);
-                }else{
-                  zOut[j++] = 0xe0 | (v>>12);
-                  zOut[j++] = 0x80 | ((v>>6)&0x3f);
-                  zOut[j++] = 0x80 | (v&0x3f);
-                }
+                zOut[j++] = (char)(0xe0 | (v>>12));
+                zOut[j++] = 0x80 | ((v>>6)&0x3f);
+                zOut[j++] = 0x80 | (v&0x3f);
              }
            }else{
              if( c=='b' ){
@@ -1124,7 +1083,6 @@ static JsonNode *jsonLookupStep(
  const char *zKey;
  JsonNode *pRoot = &pParse->aNode[iRoot];
  if( zPath[0]==0 ) return pRoot;
-  if( pRoot->jnFlags & JNODE_REPLACE ) return 0;
  if( zPath[0]=='.' ){
    if( pRoot->eType!=JSON_OBJECT ) return 0;
    zPath++;
@@ -1165,7 +1123,7 @@ static JsonNode *jsonLookupStep(
      u32 iStart, iLabel;
      JsonNode *pNode;
      iStart = jsonParseAddNode(pParse, JSON_OBJECT, 2, 0);
-      iLabel = jsonParseAddNode(pParse, JSON_STRING, nKey, zKey);
+      iLabel = jsonParseAddNode(pParse, JSON_STRING, i, zPath);
      zPath += i;
      pNode = jsonLookupAppend(pParse, zPath, pApnd, pzErr);
      if( pParse->oom ) return 0;
@@ -1177,49 +1135,18 @@ static JsonNode *jsonLookupStep(
      }
      return pNode;
    }
-  }else if( zPath[0]=='[' ){
+  }else if( zPath[0]=='[' && safe_isdigit(zPath[1]) ){
+    if( pRoot->eType!=JSON_ARRAY ) return 0;
    i = 0;
    j = 1;
    while( safe_isdigit(zPath[j]) ){
      i = i*10 + zPath[j] - '0';
      j++;
    }
-    if( j<2 || zPath[j]!=']' ){
-      if( zPath[1]=='#' ){
-        JsonNode *pBase = pRoot;
-        int iBase = iRoot;
-        if( pRoot->eType!=JSON_ARRAY ) return 0;
-        for(;;){
-          while( j<=pBase->n ){
-            if( (pBase[j].jnFlags & JNODE_REMOVE)==0 ) i++;
-            j += jsonNodeSize(&pBase[j]);
-          }
-          if( (pBase->jnFlags & JNODE_APPEND)==0 ) break;
-          iBase += pBase->u.iAppend;
-          pBase = &pParse->aNode[iBase];
-          j = 1;
-        }
-        j = 2;
-        if( zPath[2]=='-' && safe_isdigit(zPath[3]) ){
-          unsigned int x = 0;
-          j = 3;
-          do{
-            x = x*10 + zPath[j] - '0';
-            j++;
-          }while( safe_isdigit(zPath[j]) );
-          if( x>i ) return 0;
-          i -= x;
-        }
-        if( zPath[j]!=']' ){
-          *pzErr = zPath;
-          return 0;
-        }
-      }else{
-        *pzErr = zPath;
-        return 0;
-      }
+    if( zPath[j]!=']' ){
+      *pzErr = zPath;
+      return 0;
    }
-    if( pRoot->eType!=JSON_ARRAY ) return 0;
    zPath += j + 1;
    j = 1;
    for(;;){
@@ -1892,7 +1819,7 @@ static void jsonArrayStep(
    if( pStr->zBuf==0 ){
      jsonInit(pStr, ctx);
      jsonAppendChar(pStr, '[');
-    }else if( pStr->nUsed>1 ){
+    }else{
      jsonAppendChar(pStr, ',');
      pStr->pCtx = ctx;
    }
@@ -1940,11 +1867,9 @@ static void jsonGroupInverse(
  int argc,
  sqlite3_value **argv
 ){
-  unsigned int i;
+  int i;
  int inStr = 0;
-  int nNest = 0;
  char *z;
-  char c;
  JsonString *pStr;
  UNUSED_PARAM(argc);
  UNUSED_PARAM(argv);
@@ -1955,18 +1880,12 @@ static void jsonGroupInverse(
  if( NEVER(!pStr) ) return;
 #endif
  z = pStr->zBuf;
-  for(i=1; (c = z[i])!=',' || inStr || nNest; i++){
-    if( i>=pStr->nUsed ){
-      pStr->nUsed = 1;
-      return;
-    }
-    if( c=='"' ){
+  for(i=1; z[i]!=',' || inStr; i++){
+    assert( i<pStr->nUsed );
+    if( z[i]=='"' ){
      inStr = !inStr;
-    }else if( c=='\\' ){
+    }else if( z[i]=='\\' ){
      i++;
-    }else if( !inStr ){
-      if( c=='{' || c=='[' ) nNest++;
-      if( c=='}' || c==']' ) nNest--;
    }
  }
  pStr->nUsed -= i;      
@@ -1996,7 +1915,7 @@ static void jsonObjectStep(
    if( pStr->zBuf==0 ){
      jsonInit(pStr, ctx);
      jsonAppendChar(pStr, '{');
-    }else if( pStr->nUsed>1 ){
+    }else{
      jsonAppendChar(pStr, ',');
      pStr->pCtx = ctx;
    }
@@ -2092,7 +2011,6 @@ static int jsonEachConnect(
    pNew = *ppVtab = sqlite3_malloc( sizeof(*pNew) );
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
-    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  }
  return rc;
 }
@@ -2583,19 +2501,16 @@ int sqlite3Json1Init(sqlite3 *db){
    { "json_tree",            &jsonTreeModule               },
  };
 #endif
-  static const int enc = 
-       SQLITE_UTF8 |
-       SQLITE_DETERMINISTIC |
-       SQLITE_INNOCUOUS;
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
-    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg, enc,
+    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
+                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC, 
                                 (void*)&aFunc[i].flag,
                                 aFunc[i].xFunc, 0, 0);
  }
 #ifndef SQLITE_OMIT_WINDOWFUNC
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_window_function(db, aAgg[i].zName, aAgg[i].nArg,
-                                 SQLITE_SUBTYPE | enc, 0,
+                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
                                 aAgg[i].xStep, aAgg[i].xFinal,
                                 aAgg[i].xValue, jsonGroupInverse, 0);
  }
@@ -43,7 +43,7 @@ int sqlite3_mmap_warm(sqlite3 *db, const char *zDb){
  if( 0==sqlite3_get_autocommit(db) ) return SQLITE_MISUSE;

  /* Open a read-only transaction on the file in question */
-  zSql = sqlite3_mprintf("BEGIN; SELECT * FROM %s%q%ssqlite_schema", 
+  zSql = sqlite3_mprintf("BEGIN; SELECT * FROM %s%q%ssqlite_master", 
      (zDb ? "'" : ""), (zDb ? zDb : ""), (zDb ? "'." : "")
  );
  if( zSql==0 ) return SQLITE_NOMEM;
@@ -297,17 +297,14 @@ int sqlite3_nextchar_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "next_char", 3,
-                               SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
+  rc = sqlite3_create_function(db, "next_char", 3, SQLITE_UTF8, 0,
                               nextCharFunc, 0, 0);
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "next_char", 4,
-                                 SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
+    rc = sqlite3_create_function(db, "next_char", 4, SQLITE_UTF8, 0,
                                 nextCharFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "next_char", 5,
-                                 SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
+    rc = sqlite3_create_function(db, "next_char", 5, SQLITE_UTF8, 0,
                                 nextCharFunc, 0, 0);
  }
  return rc;
@@ -1,68 +0,0 @@
-/*
-** 2020-01-08
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-******************************************************************************
-**
-** This SQLite extension implements a noop() function used for testing.
-**
-** Variants:
-**
-**    noop(X)           The default.  Deterministic.
-**    noop_i(X)         Deterministic and innocuous.
-**    noop_do(X)        Deterministic and direct-only.
-**    noop_nd(X)        Non-deterministic.
-*/
-#include "sqlite3ext.h"
-SQLITE_EXTENSION_INIT1
-#include <assert.h>
-#include <string.h>
-
-/*
-** Implementation of the noop() function.
-**
-** The function returns its argument, unchanged.
-*/
-static void noopfunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  assert( argc==1 );
-  sqlite3_result_value(context, argv[0]);
-}
-
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-int sqlite3_noop_init(
-  sqlite3 *db, 
-  char **pzErrMsg, 
-  const sqlite3_api_routines *pApi
-){
-  int rc = SQLITE_OK;
-  SQLITE_EXTENSION_INIT2(pApi);
-  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "noop", 1,
-                     SQLITE_UTF8 | SQLITE_DETERMINISTIC,
-                     0, noopfunc, 0, 0);
-  if( rc ) return rc;
-  rc = sqlite3_create_function(db, "noop_i", 1,
-                     SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_INNOCUOUS,
-                     0, noopfunc, 0, 0);
-  if( rc ) return rc;
-  rc = sqlite3_create_function(db, "noop_do", 1,
-                     SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_DIRECTONLY,
-                     0, noopfunc, 0, 0);
-  if( rc ) return rc;
-  rc = sqlite3_create_function(db, "noop_nd", 1,
-                     SQLITE_UTF8,
-                     0, noopfunc, 0, 0);
-  return rc;
-}
@@ -213,8 +213,7 @@ int sqlite3_percentile_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "percentile", 2, 
-                               SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
+  rc = sqlite3_create_function(db, "percentile", 2, SQLITE_UTF8, 0,
                               0, percentStep, percentFinal);
  return rc;
 }
@@ -79,7 +79,6 @@ static int prefixesConnect(
    *ppVtab = (sqlite3_vtab*)pNew;
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
-    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  }
  return rc;
 }
@@ -156,7 +156,7 @@ static unsigned re_next_char(ReInput *p){
           && (p->z[p->i+1]&0xc0)==0x80 ){
      c = (c&0x0f)<<12 | ((p->z[p->i]&0x3f)<<6) | (p->z[p->i+1]&0x3f);
      p->i += 2;
-      if( c<=0x7ff || (c>=0xd800 && c<=0xdfff) ) c = 0xfffd;
+      if( c<=0x3ff || (c>=0xd800 && c<=0xdfff) ) c = 0xfffd;
    }else if( (c&0xf8)==0xf0 && p->i+3<p->mx && (p->z[p->i]&0xc0)==0x80
           && (p->z[p->i+1]&0xc0)==0x80 && (p->z[p->i+2]&0xc0)==0x80 ){
      c = (c&0x07)<<18 | ((p->z[p->i]&0x3f)<<12) | ((p->z[p->i+1]&0x3f)<<6)
@@ -610,7 +610,7 @@ static const char *re_subcompile_string(ReCompiled *p){
 ** regular expression.  Applications should invoke this routine once
 ** for every call to re_compile() to avoid memory leaks.
 */
-static void re_free(ReCompiled *pRe){
+void re_free(ReCompiled *pRe){
  if( pRe ){
    sqlite3_free(pRe->aOp);
    sqlite3_free(pRe->aArg);
@@ -624,7 +624,7 @@ static void re_free(ReCompiled *pRe){
 ** compiled regular expression in *ppRe.  Return NULL on success or an
 ** error message if something goes wrong.
 */
-static const char *re_compile(ReCompiled **ppRe, const char *zIn, int noCase){
+const char *re_compile(ReCompiled **ppRe, const char *zIn, int noCase){
  ReCompiled *pRe;
  const char *zErr;
  int i, j;
@@ -754,7 +754,7 @@ int sqlite3_regexp_init(
 ){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
-  rc = sqlite3_create_function(db, "regexp", 2, SQLITE_UTF8|SQLITE_INNOCUOUS,
-                               0, re_sql_func, 0, 0);
+  rc = sqlite3_create_function(db, "regexp", 2, SQLITE_UTF8, 0,
+                                 re_sql_func, 0, 0);
  return rc;
 }
@@ -105,9 +105,8 @@ int sqlite3_rot_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "rot13", 1,
-                   SQLITE_UTF8|SQLITE_INNOCUOUS|SQLITE_DETERMINISTIC,
-                   0, rot13func, 0, 0);
+  rc = sqlite3_create_function(db, "rot13", 1, SQLITE_UTF8, 0,
+                               rot13func, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_collation(db, "rot13", SQLITE_UTF8, 0, rot13CollFunc);
  }
@@ -166,7 +166,7 @@ static void scrubBackupOpenSrc(ScrubState *p){
                      sqlite3_errmsg(p->dbSrc));
    return;
  }
-  p->rcErr = sqlite3_exec(p->dbSrc, "SELECT 1 FROM sqlite_schema; BEGIN;",
+  p->rcErr = sqlite3_exec(p->dbSrc, "SELECT 1 FROM sqlite_master; BEGIN;",
                          0, 0, 0);
  if( p->rcErr ){
    scrubBackupErr(p,
@@ -535,7 +535,7 @@ int sqlite3_scrub_backup(
  /* Copy all of the btrees */
  scrubBackupBtree(&s, 1, 0);
  pStmt = scrubBackupPrepare(&s, s.dbSrc,
-       "SELECT rootpage FROM sqlite_schema WHERE coalesce(rootpage,0)>0");
+       "SELECT rootpage FROM sqlite_master WHERE coalesce(rootpage,0)>0");
  if( pStmt==0 ) goto scrub_abort;
  while( sqlite3_step(pStmt)==SQLITE_ROW ){
    i = (u32)sqlite3_column_int(pStmt, 0);
@@ -126,7 +126,6 @@ static int seriesConnect(
    pNew = *ppVtab = sqlite3_malloc( sizeof(*pNew) );
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
-    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  }
  return rc;
 }
@@ -39,9 +39,25 @@ struct SHA1Context {
  unsigned char buffer[64];
 };

+
+#if __GNUC__ && (defined(__i386__) || defined(__x86_64__))
+/*
+ * GCC by itself only generates left rotates.  Use right rotates if
+ * possible to be kinder to dinky implementations with iterative rotate
+ * instructions.
+ */
+#define SHA_ROT(op, x, k) \
+        ({ unsigned int y; asm(op " %1,%0" : "=r" (y) : "I" (k), "0" (x)); y; })
+#define rol(x,k) SHA_ROT("roll", x, k)
+#define ror(x,k) SHA_ROT("rorl", x, k)
+
+#else
+/* Generic C equivalent */
 #define SHA_ROT(x,l,r) ((x) << (l) | (x) >> (r))
 #define rol(x,k) SHA_ROT(x,k,32-(k))
 #define ror(x,k) SHA_ROT(x,32-(k),k)
+#endif
+

 #define blk0le(i) (block[i] = (ror(block[i],8)&0xFF00FF00) \
    |(rol(block[i],8)&0x00FF00FF))
@@ -381,12 +397,10 @@ int sqlite3_sha_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "sha1", 1, 
-                       SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
-                               0, sha1Func, 0, 0);
+  rc = sqlite3_create_function(db, "sha1", 1, SQLITE_UTF8, 0,
+                               sha1Func, 0, 0);
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "sha1_query", 1, 
-                                 SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
+    rc = sqlite3_create_function(db, "sha1_query", 1, SQLITE_UTF8, 0,
                                 sha1QueryFunc, 0, 0);
  }
  return rc;
@@ -0,0 +1,375 @@
+/*
+** 2019-04-26
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+**
+** This file implements a virtual-table that can be used to access a
+** sharded table implemented as the UNION ALL of various separate tables.
+*/
+#if !defined(SQLITEINT_H)
+#include "sqlite3ext.h"
+#endif
+SQLITE_EXTENSION_INIT1
+#include <string.h>
+#include <assert.h>
+#include <math.h>
+
+/* shardvtab_vtab is a subclass of sqlite3_vtab which is
+** underlying representation of the virtual table
+*/
+typedef struct shardvtab_vtab shardvtab_vtab;
+struct shardvtab_vtab {
+  sqlite3_vtab base;  /* Base class - must be first */
+  sqlite3 *db;        /* The database connection */
+  char *zView;        /* Name of view that implements the shard */
+  int nCol;           /* Number of columns in the view */
+  char **azCol;       /* Names of the columns, individually malloced */
+};
+
+/* shardvtab_cursor is a subclass of sqlite3_vtab_cursor which will
+** serve as the underlying representation of a cursor that scans
+** over rows of the result
+*/
+typedef struct shardvtab_cursor shardvtab_cursor;
+struct shardvtab_cursor {
+  sqlite3_vtab_cursor base;  /* Base class - must be first */
+  sqlite3_stmt *pStmt;       /* Prepared statement to access the shard */
+  int rcLastStep;            /* Last return from sqlite3_step() */
+};
+
+/*
+** The shardvtabConnect() method is invoked to create a new
+** shard virtual table.
+**
+** Think of this routine as the constructor for shardvtab_vtab objects.
+**
+** All this routine needs to do is:
+**
+**    (1) Allocate the shardvtab_vtab object and initialize all fields.
+**
+**    (2) Tell SQLite (via the sqlite3_declare_vtab() interface) what the
+**        result set of queries against the virtual table will look like.
+*/
+static int shardvtabConnect(
+  sqlite3 *db,
+  void *pAux,
+  int argc, const char *const*argv,
+  sqlite3_vtab **ppVtab,
+  char **pzErr
+){
+  shardvtab_vtab *pNew;
+  int rc;
+  char *zSql;
+  sqlite3_str *pSchema;
+  sqlite3_stmt *pStmt = 0;
+  const char *zView = 0;
+  char **azCol = 0;
+  int nCol = 0;
+  char cSep;
+  int i;
+
+  if( argc!=4 || argv[0]==0 ){
+    *pzErr = sqlite3_mprintf("one argument requires: the name of a view");
+    return SQLITE_ERROR;
+  }
+  zView = argv[3];
+  zSql = sqlite3_mprintf("SELECT * FROM \"%w\"", zView);
+  if( zSql==0 ){
+    return SQLITE_NOMEM;
+  }
+  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
+  sqlite3_free(zSql);
+  if( rc ){
+    *pzErr = sqlite3_mprintf("not a valid view: \"%w\"", zView);
+    return SQLITE_NOMEM;
+  }
+  pSchema = sqlite3_str_new(db);
+  if( pSchema==0 ){
+    sqlite3_finalize(pStmt);
+    return SQLITE_NOMEM;
+  }
+  sqlite3_str_appendall(pSchema, "CREATE TABLE x");
+  cSep = '(';
+  for(i=0; i<sqlite3_column_count(pStmt); i++){
+    const char *zName = sqlite3_column_name(pStmt,i);
+    char **azNew = sqlite3_realloc64(azCol, sizeof(azCol[0])*(i+1));
+    if( azNew==0 ){
+      rc = SQLITE_NOMEM;
+      goto shardvtab_connect_error;
+    }
+    sqlite3_str_appendf(pSchema, "%c\"%w\"", cSep, zName);
+    cSep = ',';
+    azCol = azNew;
+    azCol[nCol] = sqlite3_mprintf("%s", zName);
+    if( azCol[nCol]==0 ){
+      rc = SQLITE_NOMEM;
+      goto shardvtab_connect_error;
+    }
+    nCol++;
+  }
+  sqlite3_str_appendall(pSchema, ")");
+  sqlite3_finalize(pStmt);
+  pStmt = 0;
+  zSql = sqlite3_str_finish(pSchema);
+  pSchema = 0;
+  if( zSql==0 ){
+    rc = SQLITE_NOMEM;
+    goto shardvtab_connect_error;
+  }
+  rc = sqlite3_declare_vtab(db, zSql);
+  sqlite3_free(zSql);
+  if( rc!=SQLITE_OK ){
+    goto shardvtab_connect_error;
+  }else{
+    size_t n = strlen(zView) + 1;
+    pNew = sqlite3_malloc64( sizeof(*pNew) + n );
+    *ppVtab = (sqlite3_vtab*)pNew;
+    if( pNew==0 ){
+      rc = SQLITE_NOMEM;
+      goto shardvtab_connect_error;
+    }
+    memset(pNew, 0, sizeof(*pNew));
+    pNew->db = db;
+    pNew->zView = (char*)&pNew[1];
+    memcpy(pNew->zView, zView, n);
+    pNew->nCol = nCol;
+    pNew->azCol = azCol;
+  }
+  return SQLITE_OK;
+
+shardvtab_connect_error:
+  sqlite3_finalize(pStmt);
+  for(i=0; i<nCol; i++) sqlite3_free(azCol[i]);
+  sqlite3_free(azCol);
+  sqlite3_free(sqlite3_str_finish(pSchema));
+  return rc;
+}
+
+/*
+** This method is the destructor for shardvtab_vtab objects.
+*/
+static int shardvtabDisconnect(sqlite3_vtab *pVtab){
+  int i;
+  shardvtab_vtab *p = (shardvtab_vtab*)pVtab;
+  for(i=0; i<p->nCol; i++) sqlite3_free(p->azCol[i]);
+  sqlite3_free(p->azCol);
+  sqlite3_free(p);
+  return SQLITE_OK;
+}
+
+/*
+** Constructor for a new shardvtab_cursor object.
+*/
+static int shardvtabOpen(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
+  shardvtab_cursor *pCur;
+  pCur = sqlite3_malloc( sizeof(*pCur) );
+  if( pCur==0 ) return SQLITE_NOMEM;
+  memset(pCur, 0, sizeof(*pCur));
+  *ppCursor = &pCur->base;
+  return SQLITE_OK;
+}
+
+/*
+** Destructor for a shardvtab_cursor.
+*/
+static int shardvtabClose(sqlite3_vtab_cursor *cur){
+  shardvtab_cursor *pCur = (shardvtab_cursor*)cur;
+  sqlite3_finalize(pCur->pStmt);
+  sqlite3_free(pCur);
+  return SQLITE_OK;
+}
+
+
+/*
+** Advance a shardvtab_cursor to its next row of output.
+*/
+static int shardvtabNext(sqlite3_vtab_cursor *cur){
+  shardvtab_cursor *pCur = (shardvtab_cursor*)cur;
+  int rc;
+  rc = pCur->rcLastStep = sqlite3_step(pCur->pStmt);
+  if( rc==SQLITE_ROW || rc==SQLITE_DONE ) return SQLITE_OK;
+  return rc;
+}
+
+/*
+** Return values of columns for the row at which the shardvtab_cursor
+** is currently pointing.
+*/
+static int shardvtabColumn(
+  sqlite3_vtab_cursor *cur,   /* The cursor */
+  sqlite3_context *ctx,       /* First argument to sqlite3_result_...() */
+  int i                       /* Which column to return */
+){
+  shardvtab_cursor *pCur = (shardvtab_cursor*)cur;
+  sqlite3_result_value(ctx, sqlite3_column_value(pCur->pStmt, i));
+  return SQLITE_OK;
+}
+
+/*
+** Return the rowid for the current row.  In this implementation, the
+** rowid is the same as the output value.
+*/
+static int shardvtabRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
+  *pRowid = 0;
+  return SQLITE_OK;
+}
+
+/*
+** Return TRUE if the cursor has been moved off of the last
+** row of output.
+*/
+static int shardvtabEof(sqlite3_vtab_cursor *cur){
+  shardvtab_cursor *pCur = (shardvtab_cursor*)cur;
+  return pCur->rcLastStep!=SQLITE_ROW;
+}
+
+/*
+** This method is called to "rewind" the shardvtab_cursor object back
+** to the first row of output.  This method is always called at least
+** once prior to any call to shardvtabColumn() or shardvtabRowid() or 
+** shardvtabEof().
+*/
+static int shardvtabFilter(
+  sqlite3_vtab_cursor *pVtabCursor, 
+  int idxNum, const char *idxStr,
+  int argc, sqlite3_value **argv
+){
+  shardvtab_cursor *pCur = (shardvtab_cursor *)pVtabCursor;
+  shardvtab_vtab *pTab = (shardvtab_vtab *)pVtabCursor->pVtab;
+  int rc;
+  sqlite3_finalize(pCur->pStmt);
+  pCur->pStmt = 0;
+  rc = sqlite3_prepare_v2(pTab->db, idxStr, -1, &pCur->pStmt, 0);
+  if( rc==SQLITE_OK ){
+    int i;
+    for(i=0; i<argc; i++){
+      sqlite3_bind_value(pCur->pStmt, i+1, argv[i]);
+    }
+  }else{
+    sqlite3_finalize(pCur->pStmt);
+    pCur->pStmt = 0;
+  }
+  pCur->rcLastStep = rc;
+  return rc;
+}
+
+/*
+** SQLite will invoke this method one or more times while planning a query
+** that uses the virtual table.  This routine needs to create
+** a query plan for each invocation and compute an estimated cost for that
+** plan.
+*/
+static int shardvtabBestIndex(
+  sqlite3_vtab *tab,
+  sqlite3_index_info *p
+){
+  shardvtab_vtab *pTab = (shardvtab_vtab*)tab;
+  int i;
+  int n;
+  sqlite3_stmt *pStmt;
+  int rc;
+  sqlite3_str *pSql;
+  char *zSep = "WHERE";
+  char *zSql;
+  pSql = sqlite3_str_new(pTab->db);
+  if( pSql==0 ) return SQLITE_NOMEM;
+  sqlite3_str_appendf(pSql, "SELECT * FROM \"%w\"", pTab->zView);
+  for(i=n=0; i<p->nConstraint; i++){
+    const char *zOp;
+    int iCol;
+    if( p->aConstraint[i].usable==0 ) continue;
+    iCol = p->aConstraint[i].iColumn;
+    if( iCol<0 ) continue;
+    zOp = 0;
+    switch( p->aConstraint[i].op ){
+      case SQLITE_INDEX_CONSTRAINT_EQ:     zOp = "==";     break;
+      case SQLITE_INDEX_CONSTRAINT_GT:     zOp = ">";      break;
+      case SQLITE_INDEX_CONSTRAINT_LE:     zOp = "<=";     break;
+      case SQLITE_INDEX_CONSTRAINT_LT:     zOp = "<";      break;
+      case SQLITE_INDEX_CONSTRAINT_GE:     zOp = ">=";     break;
+      case SQLITE_INDEX_CONSTRAINT_MATCH:  zOp = "MATCH";  break;
+      case SQLITE_INDEX_CONSTRAINT_LIKE:   zOp = "LIKE";   break;
+      case SQLITE_INDEX_CONSTRAINT_GLOB:   zOp = "GLOB";   break;
+      case SQLITE_INDEX_CONSTRAINT_REGEXP: zOp = "REGEXP"; break;
+      case SQLITE_INDEX_CONSTRAINT_NE:     zOp = "<>";     break;
+      case SQLITE_INDEX_CONSTRAINT_IS:     zOp = "IS";     break;
+    }
+    if( zOp ){
+      n++;
+      p->aConstraintUsage[i].argvIndex = n;
+      sqlite3_str_appendf(pSql, " %s (\"%w\" %s ?%d)", 
+                          zSep, pTab->azCol[iCol], zOp, n);
+      zSep = "AND";
+    }
+  }
+  zSql = sqlite3_str_finish(pSql);
+  if( zSql==0 ){
+    return SQLITE_NOMEM;
+  }
+  rc = sqlite3_prepare_v2(pTab->db, zSql, -1, &pStmt, 0);
+  if( rc==SQLITE_OK ){
+    int x = sqlite3_stmt_status(pStmt, SQLITE_STMTSTATUS_EST_COST, 0);
+    p->estimatedCost = pow(2.0, 0.1*x);
+    p->estimatedRows =
+            sqlite3_stmt_status(pStmt, SQLITE_STMTSTATUS_EST_ROWS, 0);
+    p->idxStr = zSql;
+    p->needToFreeIdxStr = 1;
+  }else{
+    sqlite3_free(zSql);
+  }
+  sqlite3_finalize(pStmt);
+  return rc;
+}
+
+/*
+** This following structure defines all the methods for the 
+** virtual table.
+*/
+static sqlite3_module shardvtabModule = {
+  /* iVersion    */ 0,
+  /* xCreate     */ shardvtabConnect,
+  /* xConnect    */ shardvtabConnect,
+  /* xBestIndex  */ shardvtabBestIndex,
+  /* xDisconnect */ shardvtabDisconnect,
+  /* xDestroy    */ shardvtabDisconnect,
+  /* xOpen       */ shardvtabOpen,
+  /* xClose      */ shardvtabClose,
+  /* xFilter     */ shardvtabFilter,
+  /* xNext       */ shardvtabNext,
+  /* xEof        */ shardvtabEof,
+  /* xColumn     */ shardvtabColumn,
+  /* xRowid      */ shardvtabRowid,
+  /* xUpdate     */ 0,
+  /* xBegin      */ 0,
+  /* xSync       */ 0,
+  /* xCommit     */ 0,
+  /* xRollback   */ 0,
+  /* xFindMethod */ 0,
+  /* xRename     */ 0,
+  /* xSavepoint  */ 0,
+  /* xRelease    */ 0,
+  /* xRollbackTo */ 0,
+  /* xShadowName */ 0
+};
+
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int sqlite3_shardvtab_init(
+  sqlite3 *db, 
+  char **pzErrMsg, 
+  const sqlite3_api_routines *pApi
+){
+  int rc = SQLITE_OK;
+  SQLITE_EXTENSION_INIT2(pApi);
+  rc = sqlite3_create_module(db, "shardvtab", &shardvtabModule, 0);
+  return rc;
+}
@@ -696,23 +696,19 @@ int sqlite3_shathree_init(
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
-  rc = sqlite3_create_function(db, "sha3", 1,
-                      SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
-                      0, sha3Func, 0, 0);
+  rc = sqlite3_create_function(db, "sha3", 1, SQLITE_UTF8, 0,
+                               sha3Func, 0, 0);
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "sha3", 2,
-                      SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
-                      0, sha3Func, 0, 0);
+    rc = sqlite3_create_function(db, "sha3", 2, SQLITE_UTF8, 0,
+                                 sha3Func, 0, 0);
  }
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "sha3_query", 1,
-                      SQLITE_UTF8 | SQLITE_DIRECTONLY,
-                      0, sha3QueryFunc, 0, 0);
+    rc = sqlite3_create_function(db, "sha3_query", 1, SQLITE_UTF8, 0,
+                                 sha3QueryFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "sha3_query", 2,
-                      SQLITE_UTF8 | SQLITE_DIRECTONLY,
-                      0, sha3QueryFunc, 0, 0);
+    rc = sqlite3_create_function(db, "sha3_query", 2, SQLITE_UTF8, 0,
+                                 sha3QueryFunc, 0, 0);
  }
  return rc;
 }
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
drh	282b14c9c6	Add the shardvtab virtual table that uses the new cost estimation functions. FossilOrigin-Name: 9404300ac1dd0ef4e4b42f618901c6120b15a158c230f76e47c4c6346f6f4f58	2019-04-27 20:39:38 +00:00
drh	ac2fa465e9	An experimental interface for retrieving the estimated cost and estimated number of output rows for a query. FossilOrigin-Name: 1b25fa108ab2c4ada75935abf919de2b4c3b39553b2a0ab2a485645a02352e7e	2019-04-26 17:20:33 +00:00
@@ -1 +1 @@
 .33.0
 .29.0