Add the SQLITE_CHANGESETAPPLY_NOUPDATELOOP option to the sqlite3_changeset_apply_v2/3() method. To disable the extra processing to commit changesets that swap two or more values subject to a UNIQUE constraint between rows.

FossilOrigin-Name: eba02092bcf1713a646ecf8febd53a83bc803cf1b17e2e4fc590c14d886a8d27

Makefile.msc

@@ -1766,6 +1766,7 @@ FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\test\fuzzinvariants.c
 FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\test\vt02.c
 FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\ext\recover\dbdata.c
 FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\ext\recover\sqlite3recover.c
+FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\ext\misc\analyze.c
 FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\ext\misc\base64.c
 FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\ext\misc\base85.c
 FUZZCHECK_SRC = $(FUZZCHECK_SRC) $(TOP)\ext\misc\completion.c
@@ -2342,6 +2343,7 @@ SHELL_DEP = \
     $(TOP)\ext\expert\sqlite3expert.h \
     $(TOP)\ext\intck\sqlite3intck.c \
     $(TOP)\ext\intck\sqlite3intck.h \
+    $(TOP)\ext\misc\analyze.c \
     $(TOP)\ext\misc\appendvfs.c \
     $(TOP)\ext\misc\base64.c \
     $(TOP)\ext\misc\base85.c \
@@ -2741,6 +2743,9 @@ rbu.exe:	$(TOP)\ext\rbu\rbu.c $(TOP)\ext\rbu\sqlite3rbu.c $(SQLITE3C) $(SQLITE3H
 	$(LTLINK) $(NO_WARN) -DSQLITE_ENABLE_RBU \
 		$(TOP)\ext\rbu\rbu.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)
 
+$(AUXTEST).exe:	$(TOP)\test\c\$(AUXTEST).c
+	$(LTLINK) $(NO_WARN) $(TOP)\test\c\$(AUXTEST).c sqlite3.lo /link $(LDFLAGS) $(LTLINKOPTS)
+
 THREADTEST3_SRC = \
   $(TOP)\test\threadtest3.c \
   $(TOP)\test\tt3_checkpoint.c \

README.md

@@ -33,10 +33,11 @@ verify its integrity, there are hints on how to do that in the
 
 ## Contacting The SQLite Developers
 
-The preferred way to ask questions or make comments about SQLite or to
-report bugs against SQLite is to visit the 
-[SQLite Forum](https://sqlite.org/forum) at <https://sqlite.org/forum/>.
-Anonymous postings are permitted.
+The preferred way to ask questions or make comments about SQLite is to
+visit the [SQLite Forum](https://sqlite.org/forum) at
+<https://sqlite.org/forum/>.  Anonymous postings are permitted. For
+bug reports, please use the [SQLite bugs
+forum](https://sqlite.org/bugs) at <https://sqlite.org/bugs>.
 
 If you think you have found a bug that has security implications and
 you do not want to report it on the public forum, you can send a private
@@ -80,8 +81,8 @@ Then run commands like this:
         fossil open https://sqlite.org/src
 
 The initial "fossil open" command will take two or three minutes.  Afterwards,
-you can do fast, bandwidth-efficient updates to the whatever versions
-of SQLite you like.  Some examples:
+you can do fast, bandwidth-efficient updates to whatever versions of SQLite you
+like.  Some examples:
 
         fossil update trunk             ;# latest trunk check-in
         fossil update release           ;# latest official release

autosetup/proj.tcl

@@ -2028,7 +2028,7 @@ array set proj__Cache {}
 # Returns a cache key for the given argument:
 #
 #   integer: relative call stack levels to get the scope name of for
-#   use as a key. [proj-scope [expr {1 + $arg + addLevel}]] is
+#   use as a key. [proj-scope [expr {1 + $arg + $addLevel}]] is
 #   then used to generate the key. i.e. the default of 0 uses the
 #   calling scope's name as the key.
 #
@@ -2226,7 +2226,7 @@ proc proj-coalesce {args} {
 #
 # Pragmas:
 #
-# Passing :PRAGMAS to this function may modify how it works. The
+# The prototype list may contain :PRAGMAS to modify how it works. The
 # following pragmas are supported (note the leading ":"):
 #
 #   :all-flags indicates that the whole input list should be scanned,

autosetup/sqlite-config.tcl

@@ -1067,7 +1067,7 @@ proc sqlite-get-readline-dir-list {} {
     }
     *-haiku {
       lappend dirs /boot/system/develop/headers
-      if {[opt-val with-readline-ldflags] in {auto ""}} {
+      if {![opt-bool editline] && [opt-val with-readline-ldflags] in {auto ""}} {
         # If the user did not supply their own --with-readline-ldflags
         # value, hijack that flag to inject options which are known to
         # work on Haiku OS installations.
@@ -1094,16 +1094,30 @@ proc sqlite-get-readline-dir-list {} {
 #   - HAVE_LINENOISE to 0, 1, or 2
 #   - HAVE_EDITLINE to 0 or 1
 #
-# Only one of ^^^ those will be set to non-0.
+#  Those will be set as follows:
+#
+#   HAVE_LINENOISE=0, HAVE_EDITLINE=0, HAVE_READLINE=0: no line editing
+#
+#   HAVE_LINENOISE>0: 1=antirez flavor, 2=msteveb flavor
+#
+#   HAVE_EDITLINE=0, HAVE_READLINE=1: use GNU readline
+#
+#   HAVE_EDITLINE=1, HAVE_READLINE=1: use BSD editline header
+#   <readline/readline.h>.
+#
+#   HAVE_EDITLINE=1, HAVE_READLINE=0: use BSD editline header
+#   <editline/readline.h>.
+#
+# Other defines it sets:
 #
 #   - LDFLAGS_READLINE = linker flags or empty string
 #
 #   - CFLAGS_READLINE = compilation flags for clients or empty string.
 #
-# Note that LDFLAGS_READLINE and CFLAGS_READLINE may refer to
-# linenoise or editline, not necessarily libreadline.  In some cases
-# it will set HAVE_READLINE=1 when it's really using editline, for
-# reasons described in this function's comments.
+# Both LDFLAGS_READLINE and CFLAGS_READLINE may refer to linenoise or
+# editline, not necessarily libreadline.  In some cases it will set
+# HAVE_READLINE=1 when it's really using editline, for reasons
+# described in this function's comments.
 #
 # Returns a string describing which line-editing approach to use, or
 # "none" if no option is available.
@@ -1141,7 +1155,7 @@ proc sqlite-check-line-editing {} {
   # If none of --with-linenoise, --enable-readline, or --enable-editline
   # are provided, but there exists a directory "linenoise" at $HOME or
   # a sibling of the build or source directory, then try to use that linenoise
-  # direcctory.
+  # directory.
   #
   if {"" eq $dirLn
    && ![proj-opt-was-provided readline]
@@ -1305,14 +1319,18 @@ proc sqlite-check-line-editing {} {
 
   # If we found a library, configure the build to use it...
   if {"" ne $rlLib} {
-    if {"editline" eq $editLibName && "HAVE_READLINE" eq $editLibDef} {
-      # Alert the user that, despite outward appearances, we won't be
-      # linking to the GPL'd libreadline. Presumably that distinction is
-      # significant for those using --editline.
-      proj-indented-notice {
-        NOTE: the local libedit uses <readline/readline.h> so we
-        will compile with -DHAVE_READLINE=1 but will link with
-        libedit.
+    if {"editline" eq $editLibName} {
+      # sqlite-add-shell-opt -DEL_WIDECHAR=1;
+      if {"HAVE_READLINE" eq $editLibDef} {
+        sqlite-add-shell-opt -DHAVE_EDITLINE=1
+        # Alert the user that, despite outward appearances, we won't be
+        # linking to the GPL'd libreadline. Presumably that distinction is
+        # significant for those using --editline.
+        proj-indented-notice {
+          NOTE: the local libedit uses <readline/readline.h> so we
+          will compile with -DHAVE_READLINE=1 but will link with
+          libedit.
+        }
       }
     }
     set rlLib [join $rlLib]
@@ -1745,8 +1763,12 @@ proc sqlite-handle-env-quirks {} {
   set autoDll 0; # true if --out-implib/--dll-basename should be implied
   set host [get-define host]
   switch -glob -- $host {
-    *apple* -
-    *darwin*    { set instName darwin }
+    *-*-darwin* {
+      set instName darwin
+      # We don't look for *apple* because:
+      # https://sqlite.org/forum/forumpost/7b218c3c9f207646
+      # There's at least one Linux out there which matches *apple*.
+    }
     default {
       set x [sqlite-env-is-unix-on-windows $host]
       if {"" ne $x} {
@@ -2042,7 +2064,7 @@ proc sqlite-check-tcl {} {
       }
     }
     if {![file-isexec $with_tclsh]} {
-      proj-warn "Cannot find a usable tclsh (tried: $tryThese)
+      proj-warn "Cannot find a usable tclsh (tried: $tryThese)"
     }
   }
   define TCLSH_CMD $with_tclsh

doc/testrunner.md

@@ -33,7 +33,7 @@
 The testrunner.tcl program is a Tcl script used to run multiple SQLite
 tests in parallel, thus reducing testing time on multi-core machines.
 The testrunner.tcl supports running tests that based on `testfixture`,
-`sqlite3`, and `fuzzcheck`.
+`sqlite3`, `fuzzcheck`, and C programs found in test/c.
 
 <a name="runtr"></a>
 ## 1.1 Running testrunner.tcl
@@ -59,11 +59,16 @@ up front.
 The standard Makefiles for SQLite include targets that invoke
 testrunner.tcl.  So the following commands also run testrunner.tcl:
 
+   *  `make test`
    *  `make devtest`
    *  `make releasetest`
    *  `make sdevtest`
    *  `make testrunner`
 
+Since SQLite 3.53.0, there is a "<tt>make.bat</tt>" script in the root
+of the source tree that causes the "make" command to work on Windows.
+There is no need to do something different using "nmake" on Windows.
+
 <a name="outputs"></a>
 ## 1.3 Outputs from testrunner.tcl
 

ext/fts3/fts3_aux.c

@@ -341,7 +341,7 @@ static int fts3auxNextMethod(sqlite3_vtab_cursor *pCursor){
         /* State 3. The integer just read is a column number. */
         default: assert( eState==3 );
           iCol = (int)v;
-          if( iCol<1 ){
+          if( iCol<1 || iCol>0x3fffffff ){
             rc = SQLITE_CORRUPT_VTAB;
             break;
           }

ext/fts3/fts3_expr.c

@@ -471,6 +471,7 @@ static int getNextNode(
         assert( nKey==4 );
         if( zInput[4]=='/' && zInput[5]>='0' && zInput[5]<='9' ){
           nKey += 1+sqlite3Fts3ReadInt(&zInput[nKey+1], &nNear);
+          if( nNear>=1000000000 ) nNear = 1000000000;
         }
       }
 

ext/fts3/fts3_snippet.c

@@ -887,7 +887,7 @@ static int fts3ExprLHits(
       if( p->flag==FTS3_MATCHINFO_LHITS ){
         p->aMatchinfo[iStart + iCol] = (u32)nHit;
       }else if( nHit ){
-        p->aMatchinfo[iStart + (iCol+1)/32] |= (1 << (iCol&0x1F));
+        p->aMatchinfo[iStart + iCol/32] |= (1U << (iCol&0x1F));
       }
     }
     assert( *pIter==0x00 || *pIter==0x01 );

ext/fts5/fts5_index.c

@@ -922,7 +922,7 @@ 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<4 || pRet->szLeaf>pRet->nn ){
       FTS5_CORRUPT_ROWID(p, iRowid);
       fts5DataRelease(pRet);
       pRet = 0;
@@ -2576,6 +2576,10 @@ static void fts5LeafSeek(
     if( nKeep<nMatch ){
       goto search_failed;
     }
+    if( (iOff+nNew)>n ){
+      FTS5_CORRUPT_ITER(p, pIter);
+      return;
+    }
 
     assert( nKeep>=nMatch );
     if( nKeep==nMatch ){
@@ -3702,7 +3706,7 @@ static void fts5IndexExtractColset(
       /* Advance pointer p until it points to pEnd or an 0x01 byte that is
       ** not part of a varint */
       while( p<pEnd && *p!=0x01 ){
-        while( *p++ & 0x80 );
+        while( p<pEnd && (*p++ & 0x80) );
       }
 
       if( pColset->aiCol[i]==iCurrent ){

ext/fts5/fts5_tokenize.c

@@ -586,8 +586,14 @@ static int fts5PorterCreate(
   const char *zBase = "unicode61";
   fts5_tokenizer_v2 *pV2 = 0;
 
-  if( nArg>0 ){
-    zBase = azArg[0];
+  while( nArg>0 ){
+    if( sqlite3_stricmp(azArg[0],"porter")==0 ){
+      nArg--;
+      azArg++;
+    }else{
+      zBase = azArg[0];
+      break;
+    }
   }
 
   pRet = (PorterTokenizer*)sqlite3_malloc64(sizeof(PorterTokenizer));
@@ -712,9 +718,9 @@ static int fts5Porter_Ostar(char *zStem, int nStem){
     for(i=0; i<nStem; i++){
       bCons = !fts5PorterIsVowel(zStem[i], bCons);
       assert( bCons==0 || bCons==1 );
-      mask = (mask << 1) + bCons;
+      mask = ((mask << 1) + bCons) & 0x0007;
     }
-    return ((mask & 0x0007)==0x0005);
+    return (mask==0x0005);
   }
 }
 

ext/fts5/test/fts5corrupt3.test

@@ -15153,9 +15153,9 @@ do_execsql_test 78.1 {
   CREATE VIRTUAL TABLE t3 USING fts5vocab('t1','col');
 }
 
-do_execsql_test 78.2 {
+do_catchsql_test 78.2 {
   SELECT count(rowid) FROM t3 WHERE term>='nsocse';
-} 2
+} {1 {database disk image is malformed}}
 
 #-------------------------------------------------------------------------
 reset_db

ext/fts5/test/fts5corrupt5.test

@@ -1220,7 +1220,7 @@ do_test 8.0 {
 
 do_catchsql_test 8.1 {
   SELECT rowid FROM t1('a* NOT ý‘') ;
-} {0 {1 2 3 4 5 6 7}}
+} {1 {fts5: corruption on page 1, segment 1, table "t1"}}
 
 #-------------------------------------------------------------------------
 reset_db

ext/fts5/test/fts5corruptA.test

@@ -0,0 +1,128 @@
+# 2026 May 11
+#
+# 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 fts5corruptA
+
+# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
+ifcapable !fts5 {
+  finish_test
+  return
+}
+sqlite3_fts5_may_be_corrupt 1
+
+do_execsql_test 1.0 {
+  CREATE VIRTUAL TABLE t USING fts5(x, detail='full');
+  INSERT INTO t(t, rank) VALUES('pgsz', 32);
+}
+
+set big [string repeat "a " 200]
+do_execsql_test 1.1 {
+  INSERT INTO t(rowid, x) VALUES(1, $big)
+}
+
+do_test 1.2 {
+  db eval { 
+      SELECT min(rowid) AS base_rowid, count(*) AS page_count FROM t_data
+      WHERE rowid>1000
+  } {}
+} {}
+
+do_test 1.3 {
+  for {set ii 0} {$ii < 5} {incr ii} {
+    db eval { 
+      INSERT INTO t_data(rowid, block) 
+      VALUES( $base_rowid + $page_count + $ii, zeroblob(4) );
+    }
+  }
+  db eval { 
+    INSERT INTO t_data(rowid, block) 
+      VALUES( $base_rowid + $page_count + 5, 
+      unhex('00000080' || 'CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC') );
+  }
+  set {} {}
+} {}
+
+db close
+
+do_test 1.4 {
+  set hex [hexio_read test.db 0 [file size test.db]]
+
+  set off [string first "023061018310" $hex]
+  set hex [string replace $hex $off [expr $off+11] 023061018370]
+  hexio_write test.db 0 $hex
+} {6144}
+
+sqlite3 db test.db
+
+do_catchsql_test 1.5 {
+  SELECT rowid FROM t WHERE t MATCH 'a'
+} {1 {fts5: corruption found reading blob 137438953481 from table "t"}}
+
+#-------------------------------------------------------------------------
+reset_db
+
+do_execsql_test 2.0 {
+  CREATE VIRTUAL TABLE t1 USING fts5(a);
+  BEGIN;
+    INSERT INTO t1(rowid, a) VALUES(1, 'aaaa');
+    INSERT INTO t1(rowid, a) VALUES(2, 'bbbb');
+    INSERT INTO t1(rowid, a) VALUES(3, 'cccc');
+  COMMIT;
+}
+
+db close
+
+do_test 2.1 {
+  set hex [hexio_read test.db 0 [file size test.db]]
+  set off [string first "010463636363" $hex]
+  set hex [string replace $hex $off [expr $off+11] 017F63636363]
+  hexio_write test.db 0 $hex
+  set {} {}
+} {}
+
+sqlite3 db test.db
+
+do_catchsql_test 2.2 {
+  SELECT rowid FROM t1('cccccccccccccccccccccccccccccccccccccccccccccccc');
+} {1 {fts5: corruption on page 1, segment 1, table "t1"}}
+
+#-------------------------------------------------------------------------
+reset_db
+do_execsql_test 3.0 {
+  CREATE VIRTUAL TABLE t1 USING fts5(a, b, c);
+  INSERT INTO t1 VALUES(
+      'hello',
+      'alpha bravo charlie delta echo foxtrot golf hotel india juliet kilo lima mike november oscar papa quebec romeo sierra tango uniform victor whiskey xray yankee zulu',
+      'ant bear cat dog elephant fox gorilla hippo iguana jaguar kangaroo lion monkey newt octopus panda quail rabbit snake turtle unicorn vulture walrus xerus yak zebra'
+  );
+
+  UPDATE t1_data SET block = unhex(
+      -- Preserve bytes 0-168: header through hello's nSz field
+      hex(substr(block, 1, 169))
+      -- Inject 448 bytes of 0xFF: corrupted poslist + subsequent term data
+      || replace(hex(zeroblob(448)), '00', 'FF')
+      -- Preserve 16 bytes of page index needed for hello lookup
+      || hex(substr(block, 618, 16))
+      -- Corrupt remaining 37 footer bytes (not needed for hello lookup)
+      || replace(hex(zeroblob(37)), '00', 'FF')
+      )
+  WHERE id = 137438953473;
+}
+
+do_test 3.1 {
+  execsql { SELECT * FROM t1 WHERE t1 MATCH '{a b}: hello' }
+  set {} {}
+} {}
+
+sqlite3_fts5_may_be_corrupt 0
+finish_test

ext/fts5/test/fts5porter2.test

@@ -65,5 +65,13 @@ foreach {in out} $test_vocab {
   incr i
 }
 
+#-------------------------------------------------------------------------
+reset_db
+  
+do_execsql_test 2.0 {
+  CREATE VIRTUAL TABLE tbl USING fts5(t, tokenize='porter unicode61');
+  INSERT INTO tbl VALUES(' andeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee');
+}
+
 
 finish_test

ext/fts5/test/fts5tokenizer.test

@@ -371,4 +371,14 @@ do_execsql_test 10.10 {
   a 2 2 b 2 2 c 2 2 d 1 1 e 1 1 f 1 1
 }
 
+# Bug report 2026-05-18T05:19:01Z
+#
+set manyporters {porter Porter}
+for {set i 0} {$i<18} {incr i} {
+  set manyporters "$manyporters $manyporters"
+}
+do_execsql_test 11.1 "
+  CREATE VIRTUAL TABLE t11 USING fts5(a,b,tokenize=\"$manyporters\");
+" {}
+
 finish_test

ext/icu/icu.c

@@ -362,7 +362,7 @@ static void icuCaseFunc16(sqlite3_context *p, int nArg, sqlite3_value **apArg){
   const UChar *zInput;            /* Pointer to input string */
   UChar *zOutput = 0;             /* Pointer to output buffer */
   int nInput;                     /* Size of utf-16 input string in bytes */
-  int nOut;                       /* Size of output buffer in bytes */
+  sqlite3_int64 nOut;             /* Size of output buffer in bytes */
   int cnt;
   int bToUpper;                   /* True for toupper(), false for tolower() */
   UErrorCode status;
@@ -385,7 +385,7 @@ static void icuCaseFunc16(sqlite3_context *p, int nArg, sqlite3_value **apArg){
   }
 
   for(cnt=0; cnt<2; cnt++){
-    UChar *zNew = sqlite3_realloc(zOutput, nOut);
+    UChar *zNew = sqlite3_realloc64(zOutput, nOut);
     if( zNew==0 ){
       sqlite3_free(zOutput);
       sqlite3_result_error_nomem(p);
@@ -394,9 +394,9 @@ static void icuCaseFunc16(sqlite3_context *p, int nArg, sqlite3_value **apArg){
     zOutput = zNew;
     status = U_ZERO_ERROR;
     if( bToUpper ){
-      nOut = 2*u_strToUpper(zOutput,nOut/2,zInput,nInput/2,zLocale,&status);
+      nOut = 2LL*u_strToUpper(zOutput,nOut/2,zInput,nInput/2,zLocale,&status);
     }else{
-      nOut = 2*u_strToLower(zOutput,nOut/2,zInput,nInput/2,zLocale,&status);
+      nOut = 2LL*u_strToLower(zOutput,nOut/2,zInput,nInput/2,zLocale,&status);
     }
 
     if( U_SUCCESS(status) ){

ext/misc/amatch.c

@@ -1157,7 +1157,7 @@ static int amatchNext(sqlite3_vtab_cursor *cur){
 #endif
     nWord = (int)strlen(pWord->zWord+2);
     if( nWord+20>nBuf ){
-      nBuf = (char)(nWord+100);
+      nBuf = nWord+100;
       zBuf = sqlite3_realloc64(zBuf, nBuf);
       if( zBuf==0 ) return SQLITE_NOMEM;
     }

ext/misc/analyze.c

@@ -0,0 +1,836 @@
+/*
+** 2026-04-13
+**
+** 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.
+**
+******************************************************************************
+**
+** Partial reimplement of the sqlite3_analyzer utility program as
+** loadable SQL function.
+*/
+#include "sqlite3ext.h"
+SQLITE_EXTENSION_INIT1
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+
+/*
+** State information for the analysis
+*/
+typedef struct Analysis Analysis;
+struct Analysis {
+  sqlite3 *db;               /* Database connection */
+  sqlite3_context *context;  /* SQL function context */
+  sqlite3_str *pOut;         /* Write output here */
+  char *zSU;                 /* Name of the temp.space_used table */
+  const char *zSchema;       /* Schema to be analyzed */
+};
+
+/*
+** Free all resources that the Analysis object references and
+** reset the Analysis object.
+**
+** Call this routine multiple times on the same Analysis object
+** is a harmless no-op, as long as the memory for the object itself
+** has not been freed.
+*/
+static void analysisReset(Analysis *p){
+  if( p->zSU ){
+    char *zSql = sqlite3_mprintf("DROP TABLE temp.%s;", p->zSU);
+    if( zSql ){
+      sqlite3_exec(p->db, zSql, 0, 0, 0);
+      sqlite3_free(zSql);
+    }
+  }
+  sqlite3_str_free(p->pOut);
+  sqlite3_free(p->zSU);
+  memset(p, 0, sizeof(*p));
+}
+
+/*
+** Report an error using formatted text.  If zFormat==NULL then report
+** an OOM error.
+*/
+static void analysisError(Analysis *p, const char *zFormat, ...){
+  char *zErr;
+  if( zFormat ){
+    va_list ap;
+    va_start(ap, zFormat);
+    zErr = sqlite3_vmprintf(zFormat, ap);
+    va_end(ap);
+  }else{
+    zErr = 0;
+  }
+  if( zErr==0 ){
+    sqlite3_result_error_nomem(p->context);
+  }else{
+    sqlite3_result_error(p->context, zErr, -1);
+    sqlite3_free(zErr);
+  }
+  analysisReset(p);
+}
+
+/*
+** Prepare and return an SQL statement.
+*/
+static sqlite3_stmt *analysisVPrep(Analysis *p, const char *zFmt, va_list ap){
+  char *zSql;
+  int rc;
+  sqlite3_stmt *pStmt = 0;
+  zSql = sqlite3_vmprintf(zFmt, ap);
+  if( zSql==0 ){ analysisError(p,0); return 0; }
+  rc = sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0);
+  if( rc ){
+    analysisError(p, "SQL parse error: %s\nOriginal SQL: %s",
+                                 sqlite3_errmsg(p->db), zSql);
+    sqlite3_finalize(pStmt);
+    analysisReset(p);
+    pStmt = 0;
+  }
+  sqlite3_free(zSql);
+  return pStmt;
+}
+static sqlite3_stmt *analysisPrepare(Analysis *p, const char *zFormat, ...){
+  va_list ap;
+  sqlite3_stmt *pStmt = 0;
+  va_start(ap, zFormat);
+  pStmt = analysisVPrep(p,zFormat,ap);
+  va_end(ap);
+  return pStmt;
+}
+
+/*
+** If rc is something other than SQLITE_DONE or SQLITE_OK, then report
+** an error and return true.
+**
+** If rc is SQLITE_DONE or SQLITE_OK, then return false.
+**
+** The prepared statement is closed in either case.
+*/
+static int analysisStmtFinish(Analysis *p, int rc, sqlite3_stmt *pStmt){
+  if( rc==SQLITE_DONE ){
+    rc = SQLITE_OK;
+  }
+  if( rc!=SQLITE_OK || (rc = sqlite3_reset(pStmt))!=SQLITE_OK ){
+    analysisError(p, "SQL run-time error: %s\nOriginal SQL: %s",
+                  sqlite3_errmsg(p->db), sqlite3_sql(pStmt));
+    analysisReset(p);
+  }
+  sqlite3_finalize(pStmt);
+  return rc;
+}
+
+/*
+** Run SQL.  Return the number of errors. 
+*/
+static int analysisSql(Analysis *p, const char *zFormat, ...){
+  va_list ap;
+  int rc;
+  sqlite3_stmt *pStmt = 0;
+  va_start(ap, zFormat);
+  pStmt = analysisVPrep(p,zFormat,ap);
+  va_end(ap);
+  if( pStmt==0 ) return 1;
+  while( (rc = sqlite3_step(pStmt))==SQLITE_ROW ){}
+  if( rc==SQLITE_DONE ){
+    rc = SQLITE_OK;
+  }else{
+    analysisError(p, "SQL run-time error: %s\nOriginal SQL: %s",
+                  sqlite3_errmsg(p->db), sqlite3_sql(pStmt));
+    analysisReset(p);
+  }
+  sqlite3_finalize(pStmt);
+  return rc;
+}
+
+/*
+** Run an SQL query that returns an integer.  Write that integer
+** into *piRes.  Return the number of errors. 
+*/
+static int analysisSqlInt(
+  Analysis *p,
+  sqlite3_int64 *piRes,
+  const char *zFormat, ...
+){
+  va_list ap;
+  int rc;
+  sqlite3_stmt *pStmt = 0;
+  va_start(ap, zFormat);
+  pStmt = analysisVPrep(p,zFormat,ap);
+  va_end(ap);
+  if( pStmt==0 ) return 1;
+  rc = sqlite3_step(pStmt);
+  if( rc==SQLITE_ROW ){
+    *piRes = sqlite3_column_int64(pStmt, 0);
+    rc = SQLITE_OK;
+  }else if( rc==SQLITE_DONE ){
+    rc = SQLITE_OK;
+  }else{
+    if( p->db ){
+      /* p->db is NULL if there was some prior error */
+      analysisError(p, "SQL run-time error: %s\nOriginal SQL: %s",
+                    sqlite3_errmsg(p->db), sqlite3_sql(pStmt));
+    }
+    analysisReset(p);
+  }
+  sqlite3_finalize(pStmt);
+  return rc;
+}
+
+/*
+** Add to the output a title line that contains the text determined
+** by the format string.  If the output is initially empty, begin
+** the title line with "/" so that it forms the beginning of a C-style
+** comment.  Otherwise begin with a new-line.  Always finish with a
+** newline.
+*/
+static void analysisTitle(Analysis *p, const char *zFormat, ...){
+  char *zFirst;
+  char *zTitle;
+  size_t nTitle;
+  va_list ap;
+  va_start(ap, zFormat);
+  zTitle = sqlite3_vmprintf(zFormat, ap);
+  va_end(ap);
+  if( zTitle==0 ){
+    analysisError(p, 0);
+    return;
+  }
+  zFirst = sqlite3_str_length(p->pOut)==0 ? "/" : "\n*";
+  nTitle = strlen(zTitle);
+  if( nTitle>=75 ){
+    sqlite3_str_appendf(p->pOut, "%s** %z\n\n", zFirst, zTitle);
+  }else{
+    int nExtra = 74 - (int)nTitle;
+    sqlite3_str_appendf(p->pOut, "%s** %z %.*c\n\n", zFirst, zTitle,
+                        nExtra, '*');
+  }
+}
+
+/*
+** Add an output line that begins with the zDesc text extended out to
+** 50 columns with "." characters, and followed by whatever text is
+** described by zFormat.
+*/
+static void analysisLine(
+  Analysis *p,             /* Analysis context */
+  const char *zDesc,       /* Description */
+  const char *zFormat,     /* Argument to the description */
+  ...
+){
+  char *zTxt;
+  size_t nDesc;
+  va_list ap;
+  va_start(ap, zFormat);
+  zTxt = sqlite3_vmprintf(zFormat, ap);
+  va_end(ap);
+  if( zTxt==0 ){
+    analysisError(p, 0);
+    return;
+  }
+  nDesc = strlen(zDesc);
+  if( nDesc>=50 ){
+    sqlite3_str_appendf(p->pOut, "%s %z", zDesc, zTxt);
+  }else{
+    int nExtra = 50 - (int)nDesc;
+    sqlite3_str_appendf(p->pOut, "%s%.*c %z", zDesc, nExtra, '.', zTxt);
+  }
+}
+
+/*
+** Write a percentage into the output.  The number written should show
+** two or three significant digits, with the decimal point being the fourth
+** character.  
+*/
+static void analysisPercent(Analysis *p, double r){
+  char zNum[100];
+  char *zDP;
+  int nLeadingDigit;
+  int sz;
+  sqlite3_snprintf(sizeof(zNum)-5, zNum, r>=10.0 ? "%.3g" :"%.2g", r);
+  sz = (int)strlen(zNum);
+  zDP = strchr(zNum, '.');
+  if( zDP==0 ){
+    memcpy(zNum+sz,".0",3);
+    nLeadingDigit = sz;
+    sz += 2;
+  }else{
+    nLeadingDigit = (int)(zDP - zNum);
+  }
+  if( nLeadingDigit<3 ){
+    sqlite3_str_appendchar(p->pOut, 3-nLeadingDigit, ' ');
+  }
+  sqlite3_str_append(p->pOut, zNum, sz);
+  sqlite3_str_append(p->pOut, "%\n", 2);
+}
+
+/*
+** Create a subreport on a subset of tables and/or indexes.
+**
+** The title if the subreport is given by zTitle.  zWhere is
+** a boolean expression that can go in the WHERE clause to select
+** the relevant rows of the s.zSU table.
+*/
+static int analysisSubreport(
+  Analysis *p,                  /* Analysis context */
+  char *zTitle,                 /* Title for this subreport */
+  char *zWhere,                 /* WHERE clause for this subreport */
+  sqlite3_int64 pgsz,           /* Database page size */
+  sqlite3_int64 nPage           /* Number of pages in entire database */
+){
+  sqlite3_stmt *pStmt;          /* Statement to query p->zSU */
+  sqlite3_int64 nentry;         /* Number of btree entires */
+  sqlite3_int64 payload;        /* Payload in bytes */
+  sqlite3_int64 ovfl_payload;   /* overflow payload in bytes */
+  sqlite3_int64 mx_payload;     /* largest individual payload */
+  sqlite3_int64 ovfl_cnt;       /* Number entries using overflow */
+  sqlite3_int64 leaf_pages;     /* Leaf pages */
+  sqlite3_int64 int_pages;      /* internal pages */
+  sqlite3_int64 ovfl_pages;     /* overflow pages */
+  sqlite3_int64 leaf_unused;    /* unused bytes on leaf pages */
+  sqlite3_int64 int_unused;     /* unused bytes on internal pages */
+  sqlite3_int64 ovfl_unused;    /* unused bytes on overflow pages */
+  sqlite3_int64 int_cell;       /* B-tree entries on internal pages */
+  sqlite3_int64 depth;          /* btree depth */
+  sqlite3_int64 cnt;            /* Number of s.zSU entries that match */
+  sqlite3_int64 storage;        /* Total bytes */
+  sqlite3_int64 total_pages;    /* Total page count */
+  sqlite3_int64 total_unused;   /* Total unused bytes */
+  sqlite3_int64 total_meta;     /* Total metadata */
+  int rc;
+
+  if( zTitle==0 || zWhere==0 ){
+    analysisError(p, 0);
+    return SQLITE_NOMEM;
+  }
+  pStmt = analysisPrepare(p,
+    "SELECT\n"
+    "  sum(if(is_without_rowid OR is_index,nentry,leaf_entries)),\n" /* 0 */
+    "  sum(payload),\n"            /* 1 */
+    "  sum(ovfl_payload),\n"       /* 2 */
+    "  max(mx_payload),\n"         /* 3 */
+    "  sum(ovfl_cnt),\n"           /* 4 */
+    "  sum(leaf_pages),\n"         /* 5 */
+    "  sum(int_pages),\n"          /* 6 */
+    "  sum(ovfl_pages),\n"         /* 7 */
+    "  sum(leaf_unused),\n"        /* 8 */
+    "  sum(int_unused),\n"         /* 9 */
+    "  sum(ovfl_unused),\n"        /* 10 */
+    "  max(depth),\n"              /* 11 */
+    "  count(*),\n"                /* 12 */
+    "  sum(int_entries)\n"         /* 13 */
+    " FROM temp.%s WHERE %s",
+    p->zSU, zWhere);
+  if( pStmt==0 ) return 1;
+  rc = sqlite3_step(pStmt);
+  if( rc==SQLITE_ROW ){
+    analysisTitle(p, zTitle);
+
+    nentry = sqlite3_column_int64(pStmt, 0);
+    payload = sqlite3_column_int64(pStmt, 1);
+    ovfl_payload = sqlite3_column_int64(pStmt, 2);
+    mx_payload = sqlite3_column_int64(pStmt, 3);
+    ovfl_cnt = sqlite3_column_int64(pStmt, 4);
+    leaf_pages = sqlite3_column_int64(pStmt, 5);
+    int_pages = sqlite3_column_int64(pStmt, 6);
+    ovfl_pages = sqlite3_column_int64(pStmt, 7);
+    leaf_unused = sqlite3_column_int64(pStmt, 8);
+    int_unused = sqlite3_column_int64(pStmt, 9);
+    ovfl_unused = sqlite3_column_int64(pStmt, 10);
+    depth = sqlite3_column_int64(pStmt, 11);
+    cnt = sqlite3_column_int64(pStmt, 12);
+    int_cell = sqlite3_column_int64(pStmt, 13);
+    rc = SQLITE_DONE;
+
+    total_pages = leaf_pages + int_pages + ovfl_pages;
+    analysisLine(p, "Percentage of total database", "%.3g%%\n",
+                 (total_pages*100.0)/(double)nPage);
+    analysisLine(p, "Number of entries", "%lld\n", nentry);
+    storage = total_pages*pgsz;
+    analysisLine(p, "Bytes of storage consumed", "%lld\n", storage);
+    analysisLine(p, "Bytes of payload", "%-11lld ", payload);
+    analysisPercent(p, payload*100.0/(double)storage);
+    if( ovfl_cnt>0 ){
+      analysisLine(p, "Bytes of payload in overflow","%-11lld ",ovfl_payload);
+      analysisPercent(p, ovfl_payload*100.0/(double)payload);
+    }
+    total_unused = leaf_unused + int_unused + ovfl_unused;
+    total_meta = storage - payload - total_unused;
+    analysisLine(p, "Bytes of metadata","%-11lld ", total_meta);
+    analysisPercent(p, total_meta*100.0/(double)storage);
+    if( cnt==1 ){
+      analysisLine(p, "B-tree depth", "%lld\n", depth);
+      if( int_cell>1 ){
+        analysisLine(p, "Average fanout", "%.1f\n",
+                     (double)(int_cell+int_pages)/(double)int_pages);
+      }
+    }
+    if( nentry>0 ){
+      analysisLine(p, "Average payload per entry", "%.1f\n",
+                   (double)payload/(double)nentry);
+      analysisLine(p, "Average unused bytes per entry", "%.1f\n",
+                   (double)total_unused/(double)nentry);
+      analysisLine(p, "Average metadata per entry", "%.1f\n",
+                   (double)total_meta/(double)nentry);
+    }
+    analysisLine(p, "Maximum single-entry payload", "%lld\n", mx_payload);
+    if( nentry>0 ){
+      analysisLine(p, "Entries that use overflow", "%-11lld ", ovfl_cnt);
+      analysisPercent(p, ovfl_cnt*100.0/(double)nentry);
+    }
+    if( int_pages>0 ){
+      analysisLine(p, "Index pages used", "%lld\n", int_pages);
+    }
+    analysisLine(p, "Primary pages used", "%lld\n", leaf_pages);
+    if( ovfl_cnt ){
+      analysisLine(p, "Overflow pages used", "%lld\n", ovfl_pages);
+    }
+    analysisLine(p, "Total pages used", "%lld\n", total_pages);
+    if( int_pages>0 ){
+      analysisLine(p, "Unused bytes on index pages", "%lld\n", int_unused);
+    }
+    analysisLine(p, "Unused bytes on primary pages", "%lld\n", leaf_unused);
+    if( ovfl_cnt ){
+      analysisLine(p, "Unused bytes on overflow pages", "%lld\n", ovfl_unused);
+    }
+    analysisLine(p, "Unused bytes on all pages", "%-11lld ", total_unused);
+    analysisPercent(p, total_unused*100.0/(double)storage);
+  }
+  return analysisStmtFinish(p, rc, pStmt);
+}
+
+/*
+** SQL Function:   analyze(SCHEMA)
+**
+** Analyze the database schema named in the argument.  Return text
+** containing the analysis.
+*/
+static void analyzeFunc(
+  sqlite3_context *context,
+  int argc,
+  sqlite3_value **argv
+){
+  int rc;
+  sqlite3_stmt *pStmt;
+  int n;
+  sqlite3_int64 ii;
+  sqlite3_int64 pgsz;
+  sqlite3_int64 nPage;
+  sqlite3_int64 nPageInUse;
+  sqlite3_int64 nFreeList;
+  sqlite3_int64 nIndex;
+  sqlite3_int64 nWORowid;
+  Analysis s;
+  sqlite3_uint64 r[2];
+
+  (void)argc;
+  memset(&s, 0, sizeof(s));
+  s.db = sqlite3_context_db_handle(context);
+  s.context = context;
+  s.pOut = sqlite3_str_new(0);
+  if( sqlite3_str_errcode(s.pOut) ){
+    analysisError(&s, 0);
+    return;
+  }
+  s.zSchema = (const char*)sqlite3_value_text(argv[0]);
+  if( s.zSchema==0 ){
+    s.zSchema = "main";
+  }else if( sqlite3_strlike("temp",s.zSchema,0)==0 ){
+    analysisReset(&s);
+    sqlite3_result_text(context, "cannot analyze \"temp\"",-1,SQLITE_STATIC);
+    return;
+  }
+  ii = 0;
+  rc = analysisSqlInt(&s,&ii,"SELECT 1 FROM pragma_database_list"
+                             " WHERE name=%Q COLLATE nocase",s.zSchema);
+  if( rc || ii==0 ){
+    analysisReset(&s);
+    sqlite3_result_text(context,"no such database",-1,SQLITE_STATIC);
+    return;
+  }
+  sqlite3_randomness(sizeof(r), &r);
+  s.zSU = sqlite3_mprintf("analysis%016llx%016llx", r[0], r[1]);
+  if( s.zSU==0 ){ analysisError(&s, 0); return; }
+
+  /* The s.zSU table contains the data used for the analysis.
+  ** The table name contains 128-bits of randomness to avoid
+  ** collisions with preexisting tables in temp.
+  */
+  rc = analysisSql(&s,
+    "CREATE TABLE temp.%s(\n"
+    "   name text,                -- A table or index\n"
+    "   tblname text,             -- Table that owns name\n"
+    "   is_index boolean,         -- TRUE if it is an index\n"
+    "   is_without_rowid boolean, -- TRUE if WITHOUT ROWID table\n"
+    "   nentry int,               -- Number of entries in the BTree\n"
+    "   leaf_entries int,         -- Number of leaf entries\n"
+    "   depth int,                -- Depth of the b-tree\n"
+    "   payload int,              -- Total data stored in this table/index\n"
+    "   ovfl_payload int,         -- Total data stored on overflow pages\n"
+    "   ovfl_cnt int,             -- Number of entries that use overflow\n"
+    "   mx_payload int,           -- Maximum payload size\n"
+    "   int_pages int,            -- Interior pages used\n"
+    "   leaf_pages int,           -- Leaf pages used\n"
+    "   ovfl_pages int,           -- Overflow pages used\n"
+    "   int_unused int,           -- Unused bytes on interior pages\n"
+    "   leaf_unused int,          -- Unused bytes on primary pages\n"
+    "   ovfl_unused int,          -- Unused bytes on overflow pages\n"
+    "   int_entries int           -- Btree cells on internal pages\n"
+    ");",
+    s.zSU
+  );
+  if( rc ) return;
+
+  /* Populate the s.zSU table
+  */
+  rc = analysisSql(&s,
+    "WITH\n"
+    "  allidx(idxname) AS (\n"
+    "    SELECT name FROM \"%w\".sqlite_schema WHERE type='index'\n"
+    "  ),\n"
+    "  allobj(allname,tblname,isidx,isworowid) AS (\n"
+    "    SELECT 'sqlite_schema',\n"
+    "           'sqlite_schema',\n"
+    "           0,\n"
+    "           0\n"
+    "    UNION ALL\n"
+    "    SELECT name,\n"
+    "           tbl_name,\n"
+    "           type='index',\n"
+    "           EXISTS(SELECT 1\n"
+    "                    FROM pragma_index_list(sqlite_schema.name,%Q)\n"
+    "                   WHERE pragma_index_list.origin='pk'\n"
+    "                     AND pragma_index_list.name NOT IN allidx)\n"
+    "      FROM \"%w\".sqlite_schema\n"
+    "  )\n"
+    "INSERT INTO temp.%s\n"
+    "  SELECT\n"
+    "    allname,\n"
+    "    tblname,\n"
+    "    isidx,\n"
+    "    isworowid,\n"
+    "    sum(ncell),\n"
+    "    sum((pagetype='leaf')*ncell),\n"
+    "    max((length(if(path GLOB '*+*','',path))+3)/4),\n"
+    "    sum(payload),\n"
+    "    sum((pagetype='overflow')*payload),\n"
+    "    sum(path GLOB '*+000000'),\n"
+    "    max(mx_payload),\n"
+    "    sum(pagetype='internal'),\n"
+    "    sum(pagetype='leaf'),\n"
+    "    sum(pagetype='overflow'),\n"
+    "    sum((pagetype='internal')*unused),\n"
+    "    sum((pagetype='leaf')*unused),\n"
+    "    sum((pagetype='overflow')*unused),\n"
+    "    sum(if(pagetype='internal',ncell))\n"
+    "  FROM allobj CROSS JOIN dbstat(%Q) \n"
+    "  WHERE dbstat.name=allobj.allname\n"
+    "  GROUP BY allname;\n",
+    s.zSchema,   /* %w.sqlite_schema -- in allidx */
+    s.zSchema,   /* pragma_index_list(...,%Q) */
+    s.zSchema,   /* %w.sqlite_schema */
+    s.zSU,       /* INTO temp.%s */
+    s.zSchema    /* JOIN dbstat(%Q) */
+  );
+  if( rc ) return;
+
+  nPage = 0;
+  rc = analysisSqlInt(&s, &nPage, "PRAGMA \"%w\".page_count", s.zSchema);
+  if( rc ) return;
+  if( nPage<=0 ){
+    /* Very brief reply for an empty database */
+    analysisReset(&s);
+    sqlite3_result_text(context, "empty database", -1, SQLITE_STATIC);
+    return;
+  }
+
+  /* Begin generating the report */
+  analysisTitle(&s, "Database storage utilization report");
+  pgsz = 0;
+  rc = analysisSqlInt(&s, &pgsz, "PRAGMA \"%w\".page_size", s.zSchema);
+  if( rc ) return;
+  analysisLine(&s, "Page size in bytes","%lld\n",pgsz);
+  analysisLine(&s, "Pages in the database", "%lld\n", nPage);
+
+  nPageInUse = 0;
+  rc = analysisSqlInt(&s, &nPageInUse, 
+       "SELECT sum(leaf_pages+int_pages+ovfl_pages) FROM temp.%s", s.zSU);
+  if( rc ) return;
+  analysisLine(&s, "Pages that store data", "%-11lld ", nPageInUse);
+  analysisPercent(&s, (nPageInUse*100.0)/(double)nPage);
+
+  nFreeList = 0;
+  rc = analysisSqlInt(&s, &nFreeList, "PRAGMA \"%w\".freelist_count",s.zSchema);
+  if( rc ) return;
+  analysisLine(&s, "Pages on the freelist", "%-11lld ", nFreeList);
+  analysisPercent(&s, (nFreeList*100.0)/(double)nPage);
+
+  ii = 0;
+  rc = analysisSqlInt(&s, &ii, "PRAGMA \"%w\".auto_vacuum", s.zSchema);
+  if( rc ) return;
+  if( ii==0 || nPage<=1 ){
+    ii = 0;
+  }else{
+    double rPtrsPerPage = pgsz/5;
+    double rAvPage = (nPage-1.0)/(rPtrsPerPage+1.0);
+    ii = (sqlite3_int64)ceil(rAvPage);
+  }
+  analysisLine(&s, "Pages of auto-vacuum overhead", "%-11lld ", ii);
+  analysisPercent(&s, (ii*100.0)/(double)nPage);
+
+  ii = 0;
+  rc = analysisSqlInt(&s, &ii, 
+       "SELECT count(*)+1 FROM \"%w\".sqlite_schema WHERE type='table'",
+       s.zSchema);
+  if( rc ) return;
+  analysisLine(&s, "Number of tables", "%lld\n", ii);
+  nWORowid = 0;
+  rc = analysisSqlInt(&s, &nWORowid,
+       "SELECT count(*) FROM \"%w\".pragma_table_list WHERE wr",
+       s.zSchema);
+  if( rc ) return;
+  if( nWORowid>0 ){
+    analysisLine(&s, "Number of WITHOUT ROWID tables", "%lld\n", nWORowid);
+    analysisLine(&s, "Number of rowid tables", "%lld\n", ii - nWORowid);
+  }
+  nIndex = 0;
+  rc = analysisSqlInt(&s, &nIndex, 
+       "SELECT count(*) FROM \"%w\".sqlite_schema WHERE type='index'",
+       s.zSchema);
+  if( rc ) return;
+  analysisLine(&s, "Number of indexes", "%lld\n", nIndex);
+  ii = 0;
+  rc = analysisSqlInt(&s, &ii, 
+       "SELECT count(*) FROM \"%w\".sqlite_schema"
+       " WHERE name GLOB 'sqlite_autoindex_*' AND type='index'",
+       s.zSchema);
+  if( rc ) return;
+  analysisLine(&s, "Number of defined indexes", "%lld\n", nIndex - ii);
+  analysisLine(&s, "Number of implied indexes", "%lld\n", ii);
+  analysisLine(&s, "Size of the database in bytes", "%lld\n", pgsz*nPage);
+  ii = 0;
+  rc = analysisSqlInt(&s, &ii, 
+       "SELECT sum(payload) FROM temp.%s"
+       " WHERE NOT is_index AND name NOT LIKE 'sqlite_schema'",
+       s.zSU);
+  if( rc ) return;
+  analysisLine(&s, "Bytes of payload", "%-11lld ", ii);
+  analysisPercent(&s, ii*100.0/(double)(pgsz*nPage));
+
+  analysisTitle(&s, "Page counts for all tables with their indexes");
+  pStmt = analysisPrepare(&s,
+    "SELECT upper(tblname),\n"
+    "       sum(int_pages+leaf_pages+ovfl_pages)\n"
+    "  FROM temp.%s\n"
+    " GROUP BY 1\n"
+    " ORDER BY 2 DESC, 1;",
+    s.zSU);
+  if( pStmt==0 ) return;
+  while( (rc = sqlite3_step(pStmt))==SQLITE_ROW ){
+    sqlite3_int64 nn = sqlite3_column_int64(pStmt,1);
+    analysisLine(&s, (const char*)sqlite3_column_text(pStmt,0), "%-11lld ", nn);
+    analysisPercent(&s, (nn*100.0)/(double)nPage);
+  }
+  if( analysisStmtFinish(&s, rc, pStmt) ) return;
+
+  analysisTitle(&s, "Page counts for all tables and indexes separately");
+  pStmt = analysisPrepare(&s,
+    "SELECT upper(name),\n"
+    "       sum(int_pages+leaf_pages+ovfl_pages)\n"
+    "  FROM temp.%s\n"
+    " GROUP BY 1\n"
+    " ORDER BY 2 DESC, 1;",
+    s.zSU);
+  if( pStmt==0 ) return;
+  while( (rc = sqlite3_step(pStmt))==SQLITE_ROW ){
+    sqlite3_int64 nn = sqlite3_column_int64(pStmt,1);
+    analysisLine(&s, (const char*)sqlite3_column_text(pStmt,0), "%-11lld ", nn);
+    analysisPercent(&s, (nn*100.0)/(double)nPage);
+  }
+  if( analysisStmtFinish(&s, rc, pStmt) ) return;
+
+  rc = analysisSubreport(&s, "All tables and indexes", "1", pgsz, nPage);
+  if( rc ) return;
+  rc = analysisSubreport(&s, "All tables", "NOT is_index", pgsz, nPage);
+  if( rc ) return;
+  if( nWORowid>0 ){
+    rc = analysisSubreport(&s, "All WITHOUT ROWID tables", "is_without_rowid",
+                           pgsz, nPage);
+    if( rc ) return;
+    rc = analysisSubreport(&s, "All rowid tables",
+                           "NOT is_without_rowid AND NOT is_index",
+                           pgsz, nPage);
+    if( rc ) return;
+  }
+  rc = analysisSubreport(&s, "All indexes", "is_index", pgsz, nPage);
+  if( rc ) return;
+
+  pStmt = analysisPrepare(&s,
+    "SELECT upper(tblname), tblname, sum(is_index) FROM temp.%s"
+    " GROUP BY 1 ORDER BY 1",
+    s.zSU);
+  if( pStmt==0 ) return;
+  while( (rc = sqlite3_step(pStmt))==SQLITE_ROW ){
+    const char *zUpper = (const char*)sqlite3_column_text(pStmt, 0);
+    const char *zName = (const char*)sqlite3_column_text(pStmt, 1);
+    int nSubIndex = sqlite3_column_int(pStmt, 2);
+    if( nSubIndex==0 ){
+      char *zTitle = sqlite3_mprintf("Table %s", zUpper);
+      char *zWhere = sqlite3_mprintf("name=%Q", zName);
+      rc = analysisSubreport(&s, zTitle, zWhere, pgsz, nPage);
+      sqlite3_free(zTitle);
+      sqlite3_free(zWhere);
+      if( rc ) break;
+    }else{
+      sqlite3_stmt *pS2;
+      char *zTitle = sqlite3_mprintf("Table %s and all its indexes", zUpper);
+      char *zWhere = sqlite3_mprintf("tblname=%Q", zName);
+      rc = analysisSubreport(&s, zTitle, zWhere, pgsz, nPage);
+      sqlite3_free(zTitle);
+      sqlite3_free(zWhere);
+      if( rc ) break;
+      zTitle = sqlite3_mprintf("Table %s w/o any indexes", zUpper);
+      zWhere = sqlite3_mprintf("name=%Q", zName);
+      rc = analysisSubreport(&s, zTitle, zWhere, pgsz, nPage);
+      sqlite3_free(zTitle);
+      sqlite3_free(zWhere);
+      if( rc ) break;
+      if( nSubIndex>1 ){
+        zTitle = sqlite3_mprintf("All indexes of table %s", zUpper);
+        zWhere = sqlite3_mprintf("tblname=%Q AND is_index", zName);
+        rc = analysisSubreport(&s, zTitle, zWhere, pgsz, nPage);
+        sqlite3_free(zTitle);
+        sqlite3_free(zWhere);
+        if( rc ) break;
+      }
+      pS2 = analysisPrepare(&s,
+              "SELECT name, upper(name) FROM temp.%s"
+              " WHERE is_index AND tblname=%Q",
+              s.zSU, zName);
+      if( pS2==0 ){
+        rc = SQLITE_NOMEM;
+        break;
+      }
+      while( (rc = sqlite3_step(pS2))==SQLITE_ROW ){
+        const char *zU = (const char*)sqlite3_column_text(pS2, 1);
+        const char *zN = (const char*)sqlite3_column_text(pS2, 0);
+        zTitle = sqlite3_mprintf("Index %s", zU);
+        zWhere = sqlite3_mprintf("name=%Q", zN);
+        rc = analysisSubreport(&s, zTitle, zWhere, pgsz, nPage);
+        sqlite3_free(zTitle);
+        sqlite3_free(zWhere);
+        if( rc ) break;
+      }
+      rc = analysisStmtFinish(&s, rc, pS2);
+      if( rc ) break;
+    }
+  }
+  if( analysisStmtFinish(&s, rc, pStmt) ) return;
+
+  /* Append SQL statements that will recreate the raw data used for
+  ** the analysis.
+  */
+  analysisTitle(&s, "Raw data used to generate this report");
+  sqlite3_str_appendf(s.pOut,
+    "The following SQL will create a table named \"space_used\" which\n"
+    "contains most of the information used to generate the report above.\n"
+    "*/\n"
+  );
+  sqlite3_str_appendf(s.pOut,
+    "BEGIN;\n"
+    "CREATE TABLE space_used(\n"
+    "   name text,                -- A table or index\n"                /* 0 */
+    "   tblname text,             -- Table that owns name\n"            /* 1 */
+    "   is_index boolean,         -- TRUE if it is an index\n"          /* 2 */
+    "   is_without_rowid boolean, -- TRUE if WITHOUT ROWID table\n"     /* 3 */
+    "   nentry int,               -- Number of entries in the BTree\n"  /* 4 */
+    "   leaf_entries int,         -- Number of leaf entries\n"          /* 5 */
+    "   depth int,                -- Depth of the b-tree\n"             /* 6 */
+    "   payload int,              -- Total data in this table/index\n"  /* 7 */
+    "   ovfl_payload int,         -- Total data on overflow pages\n"    /* 8 */
+    "   ovfl_cnt int,             -- Entries that use overflow\n"       /* 9 */
+    "   mx_payload int,           -- Maximum payload size\n"            /* 10 */
+    "   int_pages int,            -- Interior pages used\n"             /* 11 */
+    "   leaf_pages int,           -- Leaf pages used\n"                 /* 12 */
+    "   ovfl_pages int,           -- Overflow pages used\n"             /* 13 */
+    "   int_unused int,           -- Unused bytes on interior pages\n"  /* 14 */
+    "   leaf_unused int,          -- Unused bytes on primary pages\n"   /* 15 */
+    "   ovfl_unused int,          -- Unused bytes on overflow pages\n"  /* 16 */
+    "   int_entries int           -- B-tree entries on internal pages\n"/* 17 */
+    ");\n"
+    "INSERT INTO space_used VALUES\n"
+  );
+  pStmt = analysisPrepare(&s,
+     "SELECT quote(name), quote(tblname),\n"                        /* 0..1 */
+     "       is_index, is_without_rowid, nentry, leaf_entries,\n"   /* 2..5 */
+     "       depth, payload, ovfl_payload, ovfl_cnt, mx_payload,\n" /* 6..10 */
+     "       int_pages, leaf_pages, ovfl_pages, int_unused,\n"      /* 11..14 */
+     "       leaf_unused, ovfl_unused, int_entries\n"               /* 15..17 */
+     "  FROM temp.%s;",
+     s.zSU);
+  if( pStmt==0 ) return;
+  n = 0;
+  while( (rc = sqlite3_step(pStmt))==SQLITE_ROW ){
+    if( n++ ) sqlite3_str_appendf(s.pOut,",\n");
+    sqlite3_str_appendf(s.pOut,
+      " (%s,%s,%lld,%lld,%lld,%lld,%lld,%lld,%lld,"
+      "%lld,%lld,%lld,%lld,%lld,%lld,%lld,%lld,%lld)",
+      sqlite3_column_text(pStmt, 0),
+      sqlite3_column_text(pStmt, 1),
+      sqlite3_column_int64(pStmt, 2),
+      sqlite3_column_int64(pStmt, 3),
+      sqlite3_column_int64(pStmt, 4),
+      sqlite3_column_int64(pStmt, 5),
+      sqlite3_column_int64(pStmt, 6),
+      sqlite3_column_int64(pStmt, 7),
+      sqlite3_column_int64(pStmt, 8),
+      sqlite3_column_int64(pStmt, 9),
+      sqlite3_column_int64(pStmt, 10),
+      sqlite3_column_int64(pStmt, 11),
+      sqlite3_column_int64(pStmt, 12),
+      sqlite3_column_int64(pStmt, 13),
+      sqlite3_column_int64(pStmt, 14),
+      sqlite3_column_int64(pStmt, 15),
+      sqlite3_column_int64(pStmt, 16),
+      sqlite3_column_int64(pStmt, 17));
+  }
+  if( rc!=SQLITE_DONE ){
+    analysisError(&s, "SQL run-time error: %s\nSQL: %s",
+                  sqlite3_errmsg(s.db), sqlite3_sql(pStmt));
+    sqlite3_finalize(pStmt);
+    return;
+  }
+  sqlite3_str_appendf(s.pOut,";\nCOMMIT;");
+  sqlite3_finalize(pStmt);
+
+  if( sqlite3_str_length(s.pOut) ){
+    sqlite3_result_text(context, sqlite3_str_finish(s.pOut), -1,
+                        sqlite3_free);
+    s.pOut = 0;
+  }
+  analysisReset(&s);
+}
+
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int sqlite3_analyze_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, "analyze", 1,
+                   SQLITE_UTF8|SQLITE_INNOCUOUS,
+                   0, analyzeFunc, 0, 0);
+  return rc;
+}

ext/misc/decimal.c

@@ -261,7 +261,7 @@ static void decimal_result(sqlite3_context *pCtx, Decimal *p){
     sqlite3_result_null(pCtx);
     return;
   }
-  z = sqlite3_malloc64( (sqlite3_int64)p->nDigit+4 );
+  z = sqlite3_malloc64( (sqlite3_int64)p->nDigit+8 );
   if( z==0 ){
     sqlite3_result_error_nomem(pCtx);
     return;

ext/misc/fileio.c

@@ -97,8 +97,6 @@ SQLITE_EXTENSION_INIT1
 #  define STRUCT_STAT struct _stat
 #  define chmod(path,mode) fileio_chmod(path,mode)
 #  define mkdir(path,mode) fileio_mkdir(path)
-   extern LPWSTR sqlite3_win32_utf8_to_unicode(const char*);
-   extern char *sqlite3_win32_unicode_to_utf8(LPCWSTR);
 #endif
 #include <time.h>
 #include <errno.h>
@@ -125,13 +123,69 @@ SQLITE_EXTENSION_INIT1
 #define FSDIR_COLUMN_PATH     5     /* Path to top of search */
 #define FSDIR_COLUMN_DIR      6     /* Path is relative to this directory */
 
+#ifdef _WIN32
+/*
+** Convert a UTF-8 string to Microsoft Unicode.
+**
+** Space to hold the returned string is obtained from sqlite3_malloc().
+*/
+static wchar_t *winUtf8To16(const char *zText){
+  int nChar;
+  wchar_t *zWideText;
+
+  nChar = MultiByteToWideChar(CP_UTF8, 0, zText, -1, NULL, 0);
+  if( nChar==0 ){
+    return 0;
+  }
+  zWideText = sqlite3_malloc64(nChar*sizeof(WCHAR) );
+  if( zWideText==0 ){
+    return 0;
+  }
+  nChar = MultiByteToWideChar(CP_UTF8, 0, zText, -1, zWideText,
+                                nChar);
+  if( nChar==0 ){
+    sqlite3_free(zWideText);
+    zWideText = 0;
+  }
+  return zWideText;
+}
+#endif /* _WIN32 */
+
+#ifdef _WIN32
+/*
+** Convert a Microsoft Unicode string to UTF-8.
+**
+** Space to hold the returned string is obtained from sqlite3_malloc().
+*/
+static char *winUtf16To8(wchar_t *zWideText){
+  int nByte;
+  char *zText;
+
+  nByte = WideCharToMultiByte(CP_UTF8, 0, zWideText, -1, 0, 0, 0, 0);
+  if( nByte == 0 ){
+    return 0;
+  }
+  zText = sqlite3_malloc64( nByte );
+  if( zText==0 ){
+    return 0;
+  }
+  nByte = WideCharToMultiByte(CP_UTF8, 0, zWideText, -1, zText, nByte,
+                                0, 0);
+  if( nByte == 0 ){
+    sqlite3_free(zText);
+    zText = 0;
+  }
+  return zText;
+}
+#endif /* _WIN32 */
+
 /*
 ** UTF8 chmod() function for Windows
 */
 #if defined(_WIN32) || defined(WIN32)
 static int fileio_chmod(const char *zPath, int pmode){
   int rc;
-  wchar_t *b1 = sqlite3_win32_utf8_to_unicode(zPath);
+  wchar_t *b1 = winUtf8To16(zPath);
   if( b1==0 ) return -1;
   rc = _wchmod(b1, pmode);
   sqlite3_free(b1);
@@ -145,7 +199,7 @@ static int fileio_chmod(const char *zPath, int pmode){
 #if defined(_WIN32) || defined(WIN32)
 static int fileio_mkdir(const char *zPath){
   int rc;
-  wchar_t *b1 = sqlite3_win32_utf8_to_unicode(zPath);
+  wchar_t *b1 = winUtf8To16(zPath);
   if( b1==0 ) return -1;
   rc = _wmkdir(b1);
   sqlite3_free(b1);
@@ -272,7 +326,7 @@ static int fileStat(
 ){
 #if defined(_WIN32)
   int rc;
-  wchar_t *b1 = sqlite3_win32_utf8_to_unicode(zPath);
+  wchar_t *b1 = winUtf8To16(zPath);
   if( b1==0 ) return 1;
   rc = _wstat(b1, pStatBuf);
   if( rc==0 ){
@@ -425,14 +479,13 @@ static int writeFile(
     LONGLONG intervals;
     HANDLE hFile;
     LPWSTR zUnicodeName;
-    extern LPWSTR sqlite3_win32_utf8_to_unicode(const char*);
 
     GetSystemTime(&currentTime);
     SystemTimeToFileTime(&currentTime, &lastAccess);
     intervals = (mtime*10000000) + 116444736000000000;
     lastWrite.dwLowDateTime = (DWORD)intervals;
     lastWrite.dwHighDateTime = intervals >> 32;
-    zUnicodeName = sqlite3_win32_utf8_to_unicode(zFile);
+    zUnicodeName = winUtf8To16(zFile);
     if( zUnicodeName==0 ){
       return 1;
     }
@@ -1090,12 +1143,12 @@ static char *portable_realpath(const char *zPath){
 
   if( zPath==0 ) return 0;
 
-  zPath16 = sqlite3_win32_utf8_to_unicode(zPath);
+  zPath16 = winUtf8To16(zPath);
   if( zPath16==0 ) return 0;
   z = _wfullpath(NULL, zPath16, 0);
   sqlite3_free(zPath16);
   if( z ){
-    zOut = sqlite3_win32_unicode_to_utf8(z);
+    zOut = winUtf16To8(z);
     free(z);
   }
   return zOut;

ext/misc/fossildelta.c

@@ -29,6 +29,17 @@
 ** RBU does not use this extension directly.  Rather, this extension is
 ** provided as a convenience to developers who want to analyze RBU files
 ** that contain deltas.
+**
+** Typical build commands assuming
+** 
+**    DIR=ext/misc
+*     NAME=fossildelta
+**
+** First run "make sqlite3ext.h" then:
+**
+**   linux: gcc -shared -I. -fPIC -o $NAME.so $DIR/$NAME.c
+**   OS-X:  gcc -dynamiclib -fPIC -I. -o $NAME.dylib $DIR/$NAME.c
+**   Win11: cl -I. $DIR/$NAME.c -link -dll -out:$NAME.dll
 */
 #include <string.h>
 #include <assert.h>
@@ -43,6 +54,7 @@ SQLITE_EXTENSION_INIT1
 */
 typedef unsigned int u32;
 typedef sqlite3_uint64 u64;
+typedef sqlite3_int64 i64;
 
 /*
 ** Must be a 16-bit value
@@ -769,11 +781,11 @@ struct deltaparsevtab_vtab {
 struct deltaparsevtab_cursor {
   sqlite3_vtab_cursor base;  /* Base class - must be first */
   char *aDelta;              /* The delta being parsed */
-  int nDelta;                /* Number of bytes in the delta */
-  int iCursor;               /* Current cursor location */
+  i64 iCursor;               /* Current cursor location */
+  i64 iNext;                 /* Next cursor value */
+  i64 nDelta;                /* Number of bytes in the delta */
   int eOp;                   /* Name of current operator */
   unsigned int a1, a2;       /* Arguments to current operator */
-  int iNext;                 /* Next cursor value */
 };
 
 /* Operator names:
@@ -887,14 +899,14 @@ static int deltaparsevtabNext(sqlite3_vtab_cursor *cur){
       }
       pCur->a2 = deltaGetInt(&z, &i);
       pCur->eOp = DELTAPARSE_OP_COPY;
-      pCur->iNext = (int)(&z[1] - pCur->aDelta);
+      pCur->iNext = (i64)(&z[1] - pCur->aDelta);
       break;
     }
     case ':': {
       z++;
       pCur->a2 = (unsigned int)(z - pCur->aDelta);
       pCur->eOp = DELTAPARSE_OP_INSERT;
-      pCur->iNext = (int)(&z[pCur->a1] - pCur->aDelta);
+      pCur->iNext = (i64)(&z[pCur->a1] - pCur->aDelta);
       break;
     }
     case ';': {
@@ -938,7 +950,7 @@ static int deltaparsevtabColumn(
       if( pCur->eOp==DELTAPARSE_OP_COPY ){
         sqlite3_result_int(ctx, pCur->a2);
       }else if( pCur->eOp==DELTAPARSE_OP_INSERT ){
-        if( pCur->a2 + pCur->a1 > pCur->nDelta ){
+        if( (i64)pCur->a2 + (i64)pCur->a1 > pCur->nDelta ){
           sqlite3_result_zeroblob(ctx, pCur->a1);
         }else{
           sqlite3_result_blob(ctx, pCur->aDelta+pCur->a2, pCur->a1,
@@ -1014,7 +1026,7 @@ static int deltaparsevtabFilter(
     return SQLITE_OK;
   }
   a++;
-  pCur->iNext = (unsigned int)(a - pCur->aDelta);
+  pCur->iNext = (i64)(a - pCur->aDelta);
   return SQLITE_OK;
 }
 

ext/misc/prefixes.c

@@ -289,6 +289,10 @@ static void prefixLengthFunc(
   int nL = sqlite3_value_bytes(apVal[0]);
   int nR = sqlite3_value_bytes(apVal[1]);
   int i;
+  if( zL==0 || zR==0 ){
+    sqlite3_result_int(ctx, 0);
+    return;
+  }
 
   nByte = (nL > nR ? nL : nR);
   for(i=0; i<nByte; i++){

ext/misc/regexp.c

@@ -865,7 +865,6 @@ static void re_bytecode_func(
     return;
   }
   pStr = sqlite3_str_new(0);
-  if( pStr==0 ) goto re_bytecode_func_err;
   if( pRe->nInit>0 ){
     sqlite3_str_appendf(pStr, "INIT     ");
     for(i=0; i<pRe->nInit; i++){
@@ -877,15 +876,15 @@ static void re_bytecode_func(
     sqlite3_str_appendf(pStr, "%-8s %4d\n",
          ReOpName[(unsigned char)pRe->aOp[i]], pRe->aArg[i]);
   }
+  if( sqlite3_str_errcode(pStr)==SQLITE_NOMEM ){
+    sqlite3_str_finish(pStr);
+    re_free(pRe);
+    sqlite3_result_error_nomem(context);
+    return;
+  }
   n = sqlite3_str_length(pStr);
   z = sqlite3_str_finish(pStr);
-  if( n==0 ){
-    sqlite3_free(z);
-  }else{
-    sqlite3_result_text(context, z, n-1, sqlite3_free);
-  }
-
-re_bytecode_func_err:
+  sqlite3_result_text(context, z, n-1, sqlite3_free);
   re_free(pRe);
 }
 

ext/misc/series.c

@@ -536,7 +536,7 @@ static int seriesFilter(
           if( r<(double)SMALLEST_INT64 ){
             iMin = SMALLEST_INT64;
           }else if( (idxNum & 0x0200)!=0 && r==seriesCeil(r) ){
-            iMin = (sqlite3_int64)seriesCeil(r+1.0);
+            iMin = (sqlite3_int64)seriesCeil(r)+1;
           }else{
             iMin = (sqlite3_int64)seriesCeil(r);
           }
@@ -557,7 +557,7 @@ static int seriesFilter(
           if( r>(double)LARGEST_INT64 ){
             iMax = LARGEST_INT64;
           }else if( (idxNum & 0x2000)!=0 && r==seriesFloor(r) ){
-            iMax = (sqlite3_int64)(r-1.0);
+            iMax = ((sqlite3_int64)r)-1;
           }else{
             iMax = (sqlite3_int64)seriesFloor(r);
           }

ext/misc/sha1.c

@@ -31,6 +31,10 @@ SQLITE_EXTENSION_INIT1
 /******************************************************************************
 ** The Hash Engine
 */
+#if defined(__GNUC__) && __GNUC__>=11
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wstringop-overread"
+#endif
 /* Context for the SHA1 hash */
 typedef struct SHA1Context SHA1Context;
 struct SHA1Context {
@@ -226,6 +230,9 @@ static void hash_finish(
     zOut[i*2]= 0;
   }
 }
+#if defined(__GNUC__) && __GNUC__>=11
+# pragma GCC diagnostic pop
+#endif
 /* End of the hashing logic
 *****************************************************************************/
 

ext/misc/spellfix.c

@@ -352,6 +352,7 @@ static int substituteCost(char cPrev, char cFrom, char cTo){
 **    -1  One of the inputs is NULL
 **    -2  Non-ASCII characters on input
 **    -3  Unable to allocate memory
+**    -4  Inputs too large
 **
 ** If pnMatch is not NULL, then *pnMatch is set to the number of bytes
 ** of zB that matched the pattern in zA. If zA does not end with a '*',
@@ -390,9 +391,11 @@ static int editdist1(const char *zA, const char *zB, int *pnMatch){
   for(nA=0; zA[nA]; nA++){
     if( zA[nA]&0x80 ) return -2;
   }
+  if( nA>=100000 ) return -4;
   for(nB=0; zB[nB]; nB++){
     if( zB[nB]&0x80 ) return -2;
   }
+  if( nB>=100000 ) return -4;
 
   /* Special processing if either string is empty */
   if( nA==0 ){
@@ -419,7 +422,7 @@ static int editdist1(const char *zA, const char *zB, int *pnMatch){
   if( nB<(sizeof(mStack)*4)/(sizeof(mStack[0])*5) ){
     m = mStack;
   }else{
-    m = toFree = sqlite3_malloc64( (nB+1)*5*sizeof(m[0])/4 );
+    m = toFree = sqlite3_malloc64( (nB+1)*5LL*sizeof(m[0])/4 );
     if( m==0 ) return -3;
   }
   cx = (char*)&m[nB+1];
@@ -527,6 +530,8 @@ static void editdistSqlFunc(
   if( res<0 ){
     if( res==(-3) ){
       sqlite3_result_error_nomem(context);
+    }else if( res==(-4) ){
+      sqlite3_result_error_toobig(context);
     }else if( res==(-2) ){
       sqlite3_result_error(context, "non-ASCII input to editdist()", -1);
     }else{
@@ -1008,6 +1013,8 @@ static int editDist3Core(
   unsigned int stackSpace[SQLITE_SPELLFIX_STACKALLOC_SZ/sizeof(unsigned int)];
 
   /* allocate the Wagner matrix and the aTo[] array for the TO string */
+  if( n2>10000 ) return -2;
+  if( f.n>10000 ) return -2;
   n = (f.n+1)*(n2+1);
   n = (n+1)&~1;
   nByte = n*sizeof(m[0]) + sizeof(a2[0])*n2;
@@ -1198,6 +1205,8 @@ static void editDist3SqlFunc(
     editDist3FromStringDelete(pFrom);
     if( dist==(-1) ){
       sqlite3_result_error_nomem(context);
+    }else if( dist==(-2) ){
+      sqlite3_result_error_toobig(context);
     }else{
       sqlite3_result_int(context, dist);
     }
@@ -2461,7 +2470,7 @@ static void spellfix1RunQuery(MatchQuery *p, const char *zQuery, int nQuery){
       iDist = editdist1(p->zPattern, zK1, 0);
     }
     if( iDist<0 ){
-      p->rc = SQLITE_NOMEM;
+      p->rc = iDist==(-4) ? SQLITE_TOOBIG : SQLITE_NOMEM;
       break;
     }
     pCur->nSearch++;
@@ -2773,7 +2782,7 @@ static int spellfix1Column(
           if( !zTranslit ) return SQLITE_NOMEM;
           res = editdist1(pCur->zPattern, zTranslit, &iMatchlen);
           sqlite3_free(zTranslit);
-          if( res<0 ) return SQLITE_NOMEM;
+          if( res<0 ) return res==(-4) ? SQLITE_TOOBIG : SQLITE_NOMEM;
           iMatchlen = translen_to_charlen(zWord, nWord, iMatchlen);
         }else{
           iMatchlen = utf8Charlen(zWord, nWord);

ext/qrf/qrf.c

@@ -252,6 +252,10 @@ static void qrfApproxInt64(sqlite3_str *pOut, i64 N){
     sqlite3_str_appendf(pOut, "%4lld ", N);
     return;
   }
+  if( N>=9223372036854775800LL ){
+    sqlite3_str_appendf(pOut, "%.2fE", 1e-18*(double)N);
+    return;
+  }
   for(i=1; i<=18; i++){
     N = (N+5)/10;
     if( N<10000 ){
@@ -411,8 +415,8 @@ static void qrfEqpStats(Qrf *p){
       sqlite3_str_reset(pStats);
       if( nCycle>=0 && nTotal>0 ){
         qrfApproxInt64(pStats, nCycle);
-        sqlite3_str_appendf(pStats, " %3d%%",
-            ((nCycle*100)+nTotal/2) / nTotal
+        sqlite3_str_appendf(pStats, " %3.0f%%",
+            ((100.0*(double)nCycle)+nTotal/2.0) / (double)nTotal
         );
         nSp = 2;
       }
@@ -428,7 +432,6 @@ static void qrfEqpStats(Qrf *p){
       if( nRow>=0 ){
         if( nSp ) sqlite3_str_appendchar(pStats, nSp, ' ');
         qrfApproxInt64(pStats, nRow);
-        nSp = 2;
         if( p->spec.eStyle==QRF_STYLE_StatsEst ){
           sqlite3_str_appendf(pStats, "  ");
           qrfApproxInt64(pStats, (i64)rEstCum);
@@ -718,19 +721,16 @@ static int qrfDisplayWidth(const char *zIn, sqlite3_int64 nByte, int *pnNL){
 }
 
 /*
-** Escape the input string if it is needed and in accordance with
-** eEsc, which is either QRF_ESC_Ascii or QRF_ESC_Symbol.
+** Escape the text starting at byte iStart of pStr, if needed, using the
+** escape encoding of eEsc, which is either QRF_ESC_Ascii or QRF_ESC_Symbol.
+** The pStr string is modified appropriately.
 **
 ** Escaping is needed if the string contains any control characters
 ** other than \t, \n, and \r\n
 **
-** If no escaping is needed (the common case) then set *ppOut to NULL
-** and return 0.  If escaping is needed, write the escaped string into
-** memory obtained from sqlite3_malloc64() and make *ppOut point to that
-** memory and return 0.  If an error occurs, return non-zero.
-**
-** The caller is responsible for freeing *ppFree if it is non-NULL in order
-** to reclaim memory.
+** If no escaping is needed (the common case) then pStr is unchanged.
+** If escaping is required, then pStr is expanded and modified to hold
+** an escaped representation of the text.
 */
 static void qrfEscape(
   int eEsc,            /* QRF_ESC_Ascii or QRF_ESC_Symbol */
@@ -738,20 +738,22 @@ static void qrfEscape(
   int iStart              /* Begin escapding on this byte of pStr */
 ){
   sqlite3_int64 i, j;     /* Loop counters */
-  sqlite3_int64 sz;       /* Size of the string prior to escaping */
   sqlite3_int64 nCtrl = 0;/* Number of control characters to escape */
   unsigned char *zIn;     /* Text to be escaped */
+  unsigned int nIn;       /* Bytes of text to be escaped */
   unsigned char c;        /* A single character of the text */
   unsigned char *zOut;    /* Where to write the results */
 
   /* Find the text to be escaped */
   zIn = (unsigned char*)sqlite3_str_value(pStr);
+  nIn = sqlite3_str_length(pStr);
   if( zIn==0 ) return;
   zIn += iStart;
+  nIn -= iStart;
 
   /* Count the control characters */
-  for(i=0; (c = zIn[i])!=0; i++){
-    if( c<=0x1f
+  for(i=0; i<nIn; i++){
+    if( (c = zIn[i])<=0x1f
      && c!='\t'
      && c!='\n'
      && (c!='\r' || zIn[i+1]!='\n')
@@ -763,18 +765,17 @@ static void qrfEscape(
 
   /* Make space to hold the escapes.  Copy the original text to the end
   ** of the available space. */
-  sz = sqlite3_str_length(pStr) - iStart;
   if( eEsc==QRF_ESC_Symbol ) nCtrl *= 2;
   sqlite3_str_appendchar(pStr, nCtrl, ' ');
   zOut = (unsigned char*)sqlite3_str_value(pStr);
   if( zOut==0 ) return;
   zOut += iStart;
   zIn = zOut + nCtrl;
-  memmove(zIn,zOut,sz);
+  memmove(zIn,zOut,nIn);
 
   /* Convert the control characters */
-  for(i=j=0; (c = zIn[i])!=0; i++){
-    if( c>0x1f
+  for(i=j=0; i<nIn; i++){
+    if( (c = zIn[i])>0x1f
      || c=='\t'
      || c=='\n'
      || (c=='\r' && zIn[i+1]=='\n')
@@ -786,6 +787,7 @@ static void qrfEscape(
       j += i;
     }
     zIn += i+1;
+    nIn -= i+1;
     i = -1;
     if( eEsc==QRF_ESC_Symbol ){
       zOut[j++] = 0xe2;
@@ -1188,8 +1190,22 @@ static void qrfRenderValue(Qrf *p, sqlite3_str *pOut, int iCol){
           break;
         }
         default: {
-          const char *zTxt = (const char*)sqlite3_column_text(p->pStmt,iCol);
-          qrfEncodeText(p, pOut, zTxt);
+          const void *pBlob = sqlite3_column_blob(p->pStmt,iCol);
+          int nBlob = sqlite3_column_bytes(p->pStmt,iCol);
+          int rc;
+          qrfWrite(p);
+          if( nBlob==0 ){
+            /* no-op */
+          }else if( p->spec.eEsc==QRF_ESC_Off ){
+            rc = p->spec.xWrite(p->spec.pWriteArg,pBlob,nBlob);
+            if( rc ){
+              qrfError(p, rc, "Failed to write %d bytes of BLOB output", nBlob);
+            }
+          }else{
+            sqlite3_str_append(pOut, pBlob, nBlob);
+            qrfEscape(p->spec.eEsc, pOut, 0);
+            qrfWrite(p);
+          }
         }
       }
       break;
@@ -1642,12 +1658,12 @@ static void qrfBoxLine(sqlite3_str *pOut, int N, int bDbl){
       DBL_24 DBL_24 DBL_24 DBL_24 DBL_24   DBL_24 DBL_24 DBL_24 DBL_24 DBL_24
   };/*  0       1      2     3      4        5      6      7      8      9   */
   const int nDash = 30;
-  N *= 3;
-  while( N>nDash ){
+  i64 nn = 3*(i64)N;
+  while( nn>nDash ){
     sqlite3_str_append(pOut, azDash[bDbl], nDash);
-    N -= nDash;
+    nn -= nDash;
   }
-  sqlite3_str_append(pOut, azDash[bDbl], N);
+  sqlite3_str_append(pOut, azDash[bDbl], (int)nn);
 }
 
 /*
@@ -1720,7 +1736,7 @@ static int *qrfValidLayout(
   int i;        /* Loop counter */
   int nr;       /* Number of rows */
   int w = 0;    /* Width of the current column */
-  int t;        /* Total width of all columns */
+  i64 t;        /* Total width of all columns */
   int *aw;      /* Array of individual column widths */
 
   aw = sqlite3_malloc64( sizeof(int)*nCol );
@@ -1858,8 +1874,11 @@ static void qrfRestrictScreenWidth(qrfColData *pData, Qrf *p){
     if( p->spec.bBorder==QRF_No ) sepW -= 2;
   }
   nCol = pData->nCol;
-  for(i=sumW=0; i<nCol; i++) sumW += pData->a[i].w;
-  if( p->spec.nScreenWidth >= sumW+sepW ) return;
+  for(i=0, sumW=0; i<nCol; i++){
+    if( sumW > 2147483647 - pData->a[i].w ) return;
+    sumW += pData->a[i].w;
+  }
+  if( p->spec.nScreenWidth >= (i64)sumW + sepW ) return;
 
   /* First thing to do is reduce the separation between columns */
   pData->nMargin = 0;
@@ -2734,7 +2753,7 @@ static void qrfInitialize(
   memcpy(&p->spec, pSpec, sz);
   if( p->spec.zNull==0 ) p->spec.zNull = "";
   p->mxWidth = p->spec.nScreenWidth;
-  if( p->mxWidth<=0 ) p->mxWidth = QRF_MAX_WIDTH;
+  if( p->mxWidth<=0 ) p->mxWidth = 2147483647;
   p->mxHeight = p->spec.nLineLimit;
   if( p->mxHeight<=0 ) p->mxHeight = 2147483647;
   if( p->spec.eStyle>QRF_STYLE_Table ) p->spec.eStyle = QRF_Auto;

ext/qrf/qrf.h

@@ -70,8 +70,7 @@ int sqlite3_format_query_result(
 );
 
 /*
-** Range of values for sqlite3_qrf_spec.aWidth[] entries and for
-** sqlite3_qrf_spec.mxColWidth and .nScreenWidth
+** Range of values for sqlite3_qrf_spec.aWidth[] entries.
 */
 #define QRF_MAX_WIDTH    10000
 #define QRF_MIN_WIDTH    0

ext/rbu/rbuvacuum.test

@@ -397,4 +397,65 @@ do_test 3.5 {
 } {0 SQLITE_DONE}
 
 catch { db close }
+
+#-------------------------------------------------------------------------
+# Test that a database that uses custom collation sequences can be RBU
+# vacuumed.
+#
+reset_db
+
+do_execsql_test 4.0 {
+  CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
+  INSERT INTO t1 VALUES(1, 'i');
+  INSERT INTO t1 VALUES(2, 'iiii');
+  INSERT INTO t1 VALUES(3, 'ii');
+  INSERT INTO t1 VALUES(4, 'iii');
+
+  PRAGMA writable_schema = ON;
+  UPDATE sqlite_schema SET sql = sql || '; SELECT blow_up_the_world();';
+
+  SELECT sql FROM sqlite_schema;
+} {{CREATE TABLE t1(a INTEGER PRIMARY KEY, b); SELECT blow_up_the_world();}}
+
+set ::eof 0
+proc blowup {} {
+  set ::eof 1
+}
+
+
+db close
+
+do_test 4.1 {
+  sqlite3rbu_vacuum rbu test.db state.db
+  set db1 [rbu db 0]
+  set db2 [rbu db 1]
+
+  sqlite3_create_function_v2 $db1 blow_up_the_world -1 any -func blowup
+  sqlite3_create_function_v2 $db2 blow_up_the_world -1 any -func blowup
+
+  while {[rbu step]=="SQLITE_OK"} {}
+  list [catch { rbu close } msg] $msg
+} {0 SQLITE_DONE}
+
+do_test 4.2 { set ::eof } 0
+
+sqlite3 db test.db
+do_execsql_test 4.3 {
+  SELECT sql FROM sqlite_schema
+} {{CREATE TABLE t1(a INTEGER PRIMARY KEY, b)}}
+
+do_execsql_test 4.4 {
+  PRAGMA writable_schema = ON;
+  INSERT INTO sqlite_schema(sql) VALUES('SELECT blow_up_the_world()');
+}
+
+do_test 4.5 {
+  sqlite3rbu_vacuum rbu test.db state.db
+  while {[rbu step]=="SQLITE_OK"} {}
+  list [catch { rbu close } msg] $msg
+} {1 {SQLITE_CORRUPT - malformed database schema (?)}}
+
+
+
+
 finish_test

ext/rbu/sqlite3rbu.c

@@ -3655,7 +3655,12 @@ static void rbuCreateTargetSchema(sqlite3rbu *p){
 
   while( p->rc==SQLITE_OK && sqlite3_step(pSql)==SQLITE_ROW ){
     const char *zSql = (const char*)sqlite3_column_text(pSql, 0);
-    p->rc = sqlite3_exec(p->dbMain, zSql, 0, 0, &p->zErrmsg);
+    sqlite3_stmt *pStmt = 0;
+    p->rc = prepareAndCollectError(p->dbMain, &pStmt, &p->zErrmsg, zSql);
+    if( p->rc==SQLITE_OK ){
+      sqlite3_step(pStmt);
+      rbuFinalize(p, pStmt);
+    }
   }
   rbuFinalize(p, pSql);
   if( p->rc!=SQLITE_OK ) return;

ext/recover/sqlite3recover.c

@@ -532,18 +532,39 @@ static void recoverFinalize(sqlite3_recover *p, sqlite3_stmt *pStmt){
   }
 }
 
+/*
+** Run a single SQL statement in zSql.  If zSql contains two or more
+** SQL statements separated by ';', only the first is run.
+**
+** Return the sqlite3_finalizer() or sqlite3_prepare() result code
+** from running the zSql statement.
+*/
+static int recoverOneStmt(sqlite3 *db, const char *zSql){
+  sqlite3_stmt *pStmt = 0;
+  int rc;
+  if( zSql==0 ) return SQLITE_OK;
+  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
+  if( rc ){
+    sqlite3_finalize(pStmt);
+    return rc;
+  }
+  while( SQLITE_ROW==sqlite3_step(pStmt) ){}
+  return sqlite3_finalize(pStmt);
+}
+
 /*
 ** This function is a no-op if recover handle p already contains an error
 ** (if p->errCode!=SQLITE_OK). A copy of p->errCode is returned in this 
 ** case.
 **
-** Otherwise, execute SQL script zSql. If successful, return SQLITE_OK.
-** Or, if an error occurs, leave an error code and message in the recover
-** handle and return a copy of the error code.
+** Otherwise, execute a single SQL statment in zSql.  Even if zSql contains
+** two or more SQL statements separated by ';', only execute the first one.
+** If successful, return SQLITE_OK.  Or, if an error occurs, leave an error
+** code and message in the recover handle and return a copy of the error code.
 */
 static int recoverExec(sqlite3_recover *p, sqlite3 *db, const char *zSql){
   if( p->errCode==SQLITE_OK ){
-    int rc = sqlite3_exec(db, zSql, 0, 0, 0);
+    int rc = recoverOneStmt(db, zSql);
     if( rc ){
       recoverDbError(p, db);
     }
@@ -943,7 +964,8 @@ static void recoverTransferSettings(sqlite3_recover *p){
       }
       recoverFinalize(p, p1);
     }
-    recoverExec(p, db2, "CREATE TABLE t1(a); DROP TABLE t1;");
+    recoverExec(p, db2, "CREATE TABLE t1(a)");
+    recoverExec(p, db2, "DROP TABLE t1");
 
     if( p->errCode==SQLITE_OK ){
       sqlite3 *db = p->dbOut;
@@ -1025,12 +1047,12 @@ static int recoverOpenOutput(sqlite3_recover *p){
 static void recoverOpenRecovery(sqlite3_recover *p){
   char *zSql = recoverMPrintf(p, "ATTACH %Q AS recovery;", p->zStateDb);
   recoverExec(p, p->dbOut, zSql);
-  recoverExec(p, p->dbOut,
-      "PRAGMA writable_schema = 1;"
-      "CREATE TABLE recovery.map(pgno INTEGER PRIMARY KEY, parent INT);" 
-      "CREATE TABLE recovery.schema(type, name, tbl_name, rootpage, sql);"
-  );
   sqlite3_free(zSql);
+  recoverExec(p, p->dbOut, "PRAGMA writable_schema = 1");
+  recoverExec(p, p->dbOut,
+      "CREATE TABLE recovery.map(pgno INTEGER PRIMARY KEY, parent INT)");
+  recoverExec(p, p->dbOut,
+      "CREATE TABLE recovery.schema(type, name, tbl_name, rootpage, sql)");
 }
 
 
@@ -1170,7 +1192,7 @@ static int recoverWriteSchema1(sqlite3_recover *p){
       ")"
       "SELECT rootpage, tbl, isVirtual, name, sql"
       " FROM dbschema "
-      "  WHERE tbl OR isIndex"
+      "  WHERE (tbl OR isIndex) AND sql GLOB 'CREATE *'"
       "  ORDER BY tbl DESC, name=='sqlite_sequence' DESC"
   );
 
@@ -1196,7 +1218,7 @@ static int recoverWriteSchema1(sqlite3_recover *p){
             zName, zName, zSql
         ));
       }
-      rc = sqlite3_exec(p->dbOut, zSql, 0, 0, 0);
+      rc = recoverOneStmt(p->dbOut, zSql);
       if( rc==SQLITE_OK ){
         recoverSqlCallback(p, zSql);
         if( bTable && !bVirtual ){
@@ -1238,15 +1260,17 @@ static int recoverWriteSchema2(sqlite3_recover *p){
       p->bSlowIndexes ?
       "SELECT rootpage, sql FROM recovery.schema "
       "  WHERE type!='table' AND type!='index'"
+      "    AND sql GLOB 'CREATE *'"
       :
       "SELECT rootpage, sql FROM recovery.schema "
       "  WHERE type!='table' AND (type!='index' OR sql NOT LIKE '%unique%')"
+      "    AND sql GLOB 'CREATE *'"
   );
 
   if( pSelect ){
     while( sqlite3_step(pSelect)==SQLITE_ROW ){
       const char *zSql = (const char*)sqlite3_column_text(pSelect, 1);
-      int rc = sqlite3_exec(p->dbOut, zSql, 0, 0, 0);
+      int rc = recoverOneStmt(p->dbOut, zSql);
       if( rc==SQLITE_OK ){
         recoverSqlCallback(p, zSql);
       }else if( rc!=SQLITE_ERROR ){
@@ -2624,7 +2648,7 @@ static void recoverStep(sqlite3_recover *p){
           if( bUseWrapper ) recoverUninstallWrapper(p);
         }while( p->errCode==SQLITE_NOTADB 
              && (bUseWrapper--) 
-             && SQLITE_OK==sqlite3_exec(p->dbIn, "ROLLBACK", 0, 0, 0)
+             && SQLITE_OK==recoverOneStmt(p->dbIn, "ROLLBACK")
         );
       }
 
@@ -2689,7 +2713,7 @@ static void recoverStep(sqlite3_recover *p){
       ** database. Regardless of whether or not an error has occurred, make
       ** an attempt to end the read transaction on the input database.  */
       recoverExec(p, p->dbOut, "COMMIT");
-      rc = sqlite3_exec(p->dbIn, "END", 0, 0, 0);
+      rc = recoverOneStmt(p->dbIn, "END");
       if( p->errCode==SQLITE_OK ) p->errCode = rc;
 
       recoverSqlCallback(p, "PRAGMA writable_schema = off");
@@ -2885,7 +2909,7 @@ int sqlite3_recover_finish(sqlite3_recover *p){
   }else{
     recoverFinalCleanup(p);
     if( p->bCloseTransaction && sqlite3_get_autocommit(p->dbIn)==0 ){
-      rc = sqlite3_exec(p->dbIn, "END", 0, 0, 0);
+      rc = recoverOneStmt(p->dbIn, "END");
       if( p->errCode==SQLITE_OK ) p->errCode = rc;
     }
     rc = p->errCode;

ext/rtree/rtree.c

@@ -1664,7 +1664,10 @@ static int rtreeStepToLeaf(RtreeCursor *pCur){
     pNode = rtreeNodeOfFirstSearchPoint(pCur, &rc);
     if( rc ) return rc;
     nCell = NCELL(pNode);
-    assert( nCell<200 );
+    if( nCell>RTREE_MAXCELLS ){
+      RTREE_IS_CORRUPT(pRtree);
+      return SQLITE_CORRUPT_VTAB;
+    }
     pCellData = pNode->zData + (4+pRtree->nBytesPerCell*p->iCell);
     while( p->iCell<nCell ){
       sqlite3_rtree_dbl rScore = (sqlite3_rtree_dbl)-1;

ext/session/session9.test

@@ -324,5 +324,47 @@ do_test 6.3.2 { sqlite3_errcode db2 } {SQLITE_ERROR}
 do_test 6.4 {
   catchsql { INSERT INTO c1 VALUES(100, 200) } db2
 } {1 {no such table: main.p1}}
+db2 close
+
+#-------------------------------------------------------------------------
+reset_db
+
+do_execsql_test 7.0 {
+  PRAGMA trusted_schema=OFF;
+  PRAGMA foreign_keys=ON;
+  CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);
+  CREATE TABLE t2(e TEXT PRIMARY KEY NOT NULL, f, g);
+  CREATE TABLE t3(w REAL PRIMARY KEY NOT NULL, x, y);
+  CREATE TABLE t4(z PRIMARY KEY) WITHOUT ROWID;
+  CREATE TABLE tc(a INTEGER, b INTEGER, c BLOB, d TEXT, PRIMARY KEY(a,b));
+  CREATE TABLE wr(a TEXT, b INT, c, PRIMARY KEY(a,b)) WITHOUT ROWID;
+  CREATE TABLE child(x INTEGER PRIMARY KEY, y INTEGER REFERENCES t1(a) ON DELETE CASCADE, z TEXT);
+  INSERT INTO t1 VALUES(1,2,3,4),(2,3.5,'four',x'556677'),(3,NULL,'xyz',15),(4,'bubba',2147483648,0.0);
+  INSERT INTO t1 SELECT a+4,c,d,b FROM t1;
+  INSERT INTO t2 VALUES('x1y',2,3),('x2y','four',x'556677'),('x3y',NULL,'xyz');
+  INSERT INTO t3 VALUES(1.1,'a','b'),(2.2,x'00ff','c');
+  INSERT INTO t4 VALUES('alpha'),('beta'),('gamma');
+  INSERT INTO tc VALUES(1,1,x'0102','one'),(1,2,x'0304','two'),(2,1,x'0506','three');
+  INSERT INTO wr VALUES('a',1,'wa'),('b',2,'wb');
+  INSERT INTO child VALUES(1,1,'c1'),(2,2,'c2');
+}
+
+set C [db one "SELECT unhex('
+      54 0401 0200 0074 6300 1700 0100 0000
+    0000 0000 0101 0000 0000 0069 0001 0402
+    0102 0303 6f6e 6500 0004 2008 40a1 4c0b
+    0d3f 3730 5d92 3f18 f2c9 66a6 4220 a873
+    04cc 5281 ce5c d9d4 dc8b 7003 056f 6e65
+    2d75 1700 0100 0002 5004 0100 0000 6d69
+    7800 1700 0302 6b31 0409 1100
+', ' \n')"]
+
+
+proc conflict_handler {args} { 
+  return "OMIT" 
+}
+do_test 7.1 {
+  list [catch {sqlite3changeset_apply_v2 db $::C conflict_handler} msg] $msg
+} {1 SQLITE_CORRUPT}
 
 finish_test

ext/session/sessionC.test

@@ -259,6 +259,41 @@ foreach {tn type C2hex C3hex} {
   } {1 SQLITE_CORRUPT}
 }
 
+#-------------------------------------------------------------------------
+#
+reset_db
+
+set CSD 5402010074000900010000000000000001030441414141
+set CSI 5402010074001200010000000000000001063258585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858585858
+
+do_test 7.0 {
+  sqlite3changegroup grp
+  grp add [db one {SELECT unhex($CSD)}]
+  list [catch { grp add [db one {SELECT unhex($CSI)}] } msg] $msg
+} {1 SQLITE_CORRUPT}
+grp delete
+
+#-------------------------------------------------------------------------
+#
+reset_db
+set CS 54014f300009ff
+
+do_test 8.0 {
+  sqlite3changegroup grp
+  list [catch { grp add [db one {SELECT unhex($CS)}] } msg] $msg
+} {1 SQLITE_CORRUPT}
+grp delete
+
+#-------------------------------------------------------------------------
+#
+reset_db
+set CS 540101740017000003ffffffff
+
+do_test 9.0 {
+  set C [db one {SELECT unhex($CS)}]
+  list [catch { sqlite3changeset_concat $C $C } msg] $msg
+} {1 SQLITE_CORRUPT}
 
 finish_test
 
+

ext/session/sessionG.test

@@ -82,6 +82,9 @@ do_test 2.2.1 {
   # It is not possible to apply the changeset generated by the following
   # SQL, as none of the three updated rows may be updated as part of the
   # first pass.
+  #
+  # UPDATE 19/05/2026 - it is now possible to apply such an update.
+  #
   do_then_apply_sql -ignorenoop {
     UPDATE t1 SET b=0 WHERE a=1;
     UPDATE t1 SET b=1 WHERE a=2;
@@ -89,7 +92,7 @@ do_test 2.2.1 {
     UPDATE t1 SET b=3 WHERE a=1;
   }
   db2 eval { SELECT a, b FROM t1 }
-} {1 1 2 2 3 3}
+} {1 3 2 1 3 2}
 do_test 2.2.2 { db eval { SELECT a, b FROM t1 } } {1 3 2 1 3 2}
 
 #-------------------------------------------------------------------------

ext/session/sessionchange2.test

@@ -184,10 +184,18 @@ foreach {tn script error} {
   sqlite3changegroup grp
   grp schema db main
   eval $script
-  do_test 3.1.$tn {
+  do_test 3.1.$tn.1 {
     list [catch { grp change_finish false } msg] $msg
   } [list 1 $error]
   grp delete
+
+  sqlite3changegroup grp
+  grp schema db main
+  eval $script
+  do_test 3.1.$tn.2 {
+    list [catch { grp change_finishne false } msg] $msg
+  } [list 1 [lindex $error 0]]
+  grp delete
 }
 
 do_test 3.2.1 {

ext/session/sessionconflict2.test

@@ -0,0 +1,298 @@
+# 2026 May 18
+#
+# 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.
+#
+
+if {![info exists testdir]} {
+  set testdir [file join [file dirname [info script]] .. .. test]
+} 
+source [file join [file dirname [info script]] session_common.tcl]
+source $testdir/tester.tcl
+ifcapable !session {finish_test; return}
+
+set testprefix sessionconflict2
+
+forcedelete test.db2
+sqlite3 db2 test.db2
+
+do_test 1.0 {
+  do_common_sql {
+    CREATE TABLE t1(a PRIMARY KEY, b, c UNIQUE);
+    INSERT INTO t1 VALUES(1, 1, 1);
+    INSERT INTO t1 VALUES(2, 2, 2);
+    INSERT INTO t1 VALUES(3, 3, 3);
+  }
+} {}
+
+do_test 1.1 {
+  do_then_apply_sql {
+    UPDATE t1 SET c=NULL WHERE a=1;
+    UPDATE t1 SET c=1 WHERE a=3;
+    UPDATE t1 SET c=3 WHERE a=1;
+  }
+} {}
+
+do_execsql_test -db db 1.2 {
+  SELECT rowid, * FROM t1
+} {
+  1 1 1 3
+  2 2 2 2
+  3 3 3 1
+}
+
+do_execsql_test -db db2 1.3 {
+  SELECT rowid, * FROM t1
+} {
+  1 1 1 3
+  2 2 2 2
+  3 3 3 1
+}
+
+#--------------------------------------------------------------------------
+reset_db
+db2 close
+forcedelete test.db2
+sqlite3 db2 test.db2
+
+do_test 2.0 {
+  do_common_sql {
+    CREATE TABLE t1(a PRIMARY KEY, b, c UNIQUE) WITHOUT ROWID;
+    INSERT INTO t1 VALUES(1, 1, 1);
+    INSERT INTO t1 VALUES(2, 2, 2);
+    INSERT INTO t1 VALUES(3, 3, 3);
+  }
+} {}
+
+do_test 2.1 {
+  do_then_apply_sql {
+    UPDATE t1 SET c=NULL WHERE a=1;
+    UPDATE t1 SET c=1 WHERE a=3;
+    UPDATE t1 SET c=3 WHERE a=1;
+  }
+} {}
+
+do_execsql_test -db db 2.2 {
+  SELECT * FROM t1
+} {
+  1 1 3
+  2 2 2
+  3 3 1
+}
+
+do_execsql_test -db db2 2.3 {
+  SELECT * FROM t1
+} {
+  1 1 3
+  2 2 2
+  3 3 1
+}
+
+#--------------------------------------------------------------------------
+reset_db
+db2 close
+forcedelete test.db2
+sqlite3 db2 test.db2
+
+do_test 3.0 {
+  do_common_sql {
+    CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c UNIQUE);
+    INSERT INTO t1 VALUES(1, 1, 1);
+    INSERT INTO t1 VALUES(2, 2, 2);
+    INSERT INTO t1 VALUES(3, 3, 3);
+  }
+} {}
+
+do_test 3.1 {
+  do_then_apply_sql {
+    UPDATE t1 SET c=NULL WHERE a=1;
+    UPDATE t1 SET c=1 WHERE a=3;
+    UPDATE t1 SET c=3 WHERE a=1;
+  }
+} {}
+
+do_execsql_test -db db 3.2 {
+  SELECT rowid, * FROM t1
+} {
+  1 1 1 3
+  2 2 2 2
+  3 3 3 1
+}
+
+do_execsql_test -db db2 3.3 {
+  SELECT rowid, * FROM t1
+} {
+  1 1 1 3
+  2 2 2 2
+  3 3 3 1
+}
+
+#-------------------------------------------------------------------------
+db2 close
+reset_db
+forcedelete test.db2
+sqlite3 db2 test.db2
+
+set ::conflict_list [list]
+proc xConflict {args} {
+  lappend ::conflict_list $args
+  return "OMIT"
+}
+
+proc do_conflict_test {tn bNoUpdateLoop script clist} {
+
+  uplevel [list do_test $tn.1 [subst -nocommands {
+    sqlite3session S db "main"
+    S attach *
+    eval {$script}
+    set ::changeset [S changeset]
+    S delete
+  }] {}]
+
+  if {$bNoUpdateLoop} {
+    uplevel [list do_test $tn.2.no {
+      set ::conflict_list [list]
+      sqlite3changeset_apply_v2 -noupdateloop db2 $::changeset xConflict
+      set ::conflict_list
+    } [list {*}$clist]]
+  } else {
+    uplevel [list do_test $tn.2 {
+      set ::conflict_list [list]
+      sqlite3changeset_apply_v2 db2 $::changeset xConflict
+      set ::conflict_list
+    } [list {*}$clist]]
+  }
+}
+
+do_test 4.0 {
+  do_common_sql {
+    CREATE TABLE t1(a INT PRIMARY KEY, b, c UNIQUE, d UNIQUE);
+    WITH s(i) AS (
+      SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<10
+    )
+    INSERT INTO t1 SELECT i, i, i, i FROM s;
+  }
+} {}
+
+proc swap {tbl pkcol valcol pk1 pk2} {
+  set val1 [db one "SELECT $valcol FROM $tbl WHERE $pkcol = \$pk1"]
+  set val2 [db one "SELECT $valcol FROM $tbl WHERE $pkcol = \$pk2"]
+
+  db eval "
+    UPDATE $tbl SET $valcol = NULL WHERE $pkcol IN (\$pk1, \$pk2);
+    UPDATE $tbl SET $valcol = \$val2 WHERE $pkcol = \$pk1;
+    UPDATE $tbl SET $valcol = \$val1 WHERE $pkcol = \$pk2;
+  "
+}
+
+do_conflict_test 4.1.1 0 {
+  swap t1 a c 4 5
+  swap t1 a c 2 3
+  swap t1 a c 8 1
+} {
+}
+
+do_execsql_test -db db 4.1.2 {
+  SELECT a, c FROM t1
+} {
+  1 8 2 3 3 2 4 5 5 4 6 6 7 7 8 1 9 9 10 10
+}
+do_execsql_test -db db2 4.1.3 {
+  SELECT a, c FROM t1
+} {
+  1 8 2 3 3 2 4 5 5 4 6 6 7 7 8 1 9 9 10 10
+}
+
+do_conflict_test 4.2.1 0 {
+  swap t1 a d 10 9
+  swap t1 a d  8 7
+  swap t1 a d  7 6
+  swap t1 a d  5 4
+  swap t1 a d  4 8
+} {
+}
+
+do_execsql_test -db db 4.2.2 {
+  SELECT a, d FROM t1
+} {
+  1 1  2 2  3 3  4 7  5 4  6 8  7 6  8 5  9 10  10 9
+}
+do_execsql_test -db db2 4.2.3 {
+  SELECT a, d FROM t1
+} {
+  1 1  2 2  3 3  4 7  5 4  6 8  7 6  8 5  9 10  10 9
+}
+
+do_execsql_test -db db2 4.3 {
+  INSERT INTO t1(a, b, c, d) VALUES(11, 11, 11, 11);
+}
+
+do_conflict_test 4.3.1 0 {
+  swap t1 a c 3 6
+  db eval { UPDATE t1 SET d=11 WHERE a=10; }
+  swap t1 a d 4 8
+} {
+  {UPDATE t1 CONSTRAINT {i 10 {} {} {} {} i 9} {{} {} {} {} {} {} i 11}}
+}
+
+do_conflict_test 4.3.2 0 {
+  swap t1 a c 1 2
+  swap t1 a c 3 4
+  db eval { UPDATE t1 SET c=11 WHERE a=10; }
+  swap t1 a d 5 6
+  swap t1 a d 4 5
+} {
+  {UPDATE t1 CONSTRAINT {i 10 {} {} i 10 {} {}} {{} {} {} {} i 11 {} {}}}
+}
+
+do_conflict_test 4.3.3 0 {
+  swap t1 a c 1 2
+  swap t1 a c 2 3
+  swap t1 a c 3 4
+  swap t1 a c 4 1
+} {
+}
+db2 close
+
+#-------------------------------------------------------------------------
+reset_db
+forcedelete test.db2
+sqlite3 db2 test.db2
+
+do_test 5.0 {
+  do_common_sql {
+    CREATE TABLE t1(a INT PRIMARY KEY, b UNIQUE);
+    INSERT INTO t1 VALUES('one', 'one');
+    INSERT INTO t1 VALUES('two', 'two');
+    INSERT INTO t1 VALUES('three', 'three');
+    INSERT INTO t1 VALUES('four', 'four');
+    INSERT INTO t1 VALUES('five', 'five');
+  }
+} {}
+
+do_conflict_test 5.1 1 {
+} {
+}
+
+do_conflict_test 5.2 1 {
+  swap t1 a b one two
+} {
+ {UPDATE t1 CONSTRAINT {t two t two} {{} {} t one}} 
+ {UPDATE t1 CONSTRAINT {t one t one} {{} {} t two}}
+}
+
+do_conflict_test 5.2 0 {
+  swap t1 a b four five
+} {
+}
+
+
+finish_test
+

ext/session/sessionfault3.test

@@ -94,4 +94,45 @@ do_faultsim_test 2 -faults oom-t* -prep {
   catch { S delete }
 }
 
+#-------------------------------------------------------------------------
+reset_db
+do_execsql_test 3.0 {
+  CREATE TABLE t1(a PRIMARY KEY, b UNIQUE);
+  INSERT INTO t1 VALUES(1, 'one');
+  INSERT INTO t1 VALUES(2, 'two');
+  INSERT INTO t1 VALUES(3, 'three');
+  INSERT INTO t1 VALUES(4, 'four');
+  INSERT INTO t1 VALUES(5, 'five');
+}
+faultsim_save_and_close
+faultsim_restore_and_reopen
+
+set C [changeset_from_sql {
+  UPDATE t1 SET b=NULL WHERE a IN (1, 3, 5);
+  UPDATE t1 SET b='three' WHERE a=1;
+  UPDATE t1 SET b='five' WHERE a=3;
+  UPDATE t1 SET b='one' WHERE a=5;
+}]
+
+do_execsql_test 3.1 {
+  SELECT * FROM t1
+} {
+  1 three 2 two 3 five 4 four 5 one
+}
+
+proc xConflict {args} {
+  lappend ::conflict_list $args
+  return "OMIT"
+}
+
+do_faultsim_test 3 -faults oom* -prep {
+  faultsim_restore_and_reopen
+  db eval {SELECT * FROM sqlite_schema}
+} -body {
+  sqlite3changeset_apply_v2 db $::C xConflict
+  set {} {}
+} -test {
+  faultsim_test_result {0 {}} {1 SQLITE_NOMEM}
+}
+
 finish_test

ext/session/sessionnoact.test

@@ -228,5 +228,30 @@ do_execsql_test 3.8 {
   SELECT * FROM c1;
 } {two}
 
+#-------------------------------------------------------------------------
+reset_db
+
+do_execsql_test 4.0 {
+  CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT, c INTEGER);
+  ATTACH ':memory:' AS aux;
+  CREATE TABLE aux.t1(a INTEGER PRIMARY KEY, b TEXT, c INTEGER);
+}
+
+do_test 4.1 {
+  sqlite3session S db main
+  S diff aux t1
+} {}
+
+do_test 4.2 {
+  sqlite3changeset_apply_v2 -ignorenoop -noaction db "" conflict 
+} {}
+
+breakpoint
+do_test 4.3 {
+  S diff aux t1
+} {}
+
+S delete
+
 finish_test
 

ext/session/sqlite3session.c

@@ -346,7 +346,9 @@ static int sessionVarintLen(int iVal){
 ** bytes read.
 */
 static int sessionVarintGet(const u8 *aBuf, int *piVal){
-  return getVarint32(aBuf, *piVal);
+  int ret = getVarint32(aBuf, *piVal);
+  *piVal = (*piVal & 0x7FFFFFFF);
+  return ret;
 }
 
 /*
@@ -361,7 +363,7 @@ static int sessionVarintGetSafe(const u8 *aBuf, int nBuf, int *piVal){
     memcpy(aCopy, aBuf, nBuf);
     aRead = aCopy;
   }
-  return getVarint32(aRead, *piVal);
+  return sessionVarintGet(aRead, piVal);
 }
 
 /* Load an unaligned and unsigned 32-bit integer */
@@ -638,10 +640,11 @@ static int sessionSerialLen(const u8 *a){
   int n;
   assert( a!=0 );
   e = *a;
-  if( e==0 || e==0xFF ) return 1;
-  if( e==SQLITE_NULL ) return 1;
   if( e==SQLITE_INTEGER || e==SQLITE_FLOAT ) return 9;
-  return sessionVarintGet(&a[1], &n) + 1 + n;
+  if( e==SQLITE_TEXT || e==SQLITE_BLOB ){
+    return sessionVarintGet(&a[1], &n) + 1 + n;
+  }
+  return 1;
 }
 
 /*
@@ -664,17 +667,17 @@ static unsigned int sessionChangeHash(
   u8 *a = aRecord;                /* Used to iterate through change record */
 
   for(i=0; i<pTab->nCol; i++){
-    int eType = *a;
     int isPK = pTab->abPK[i];
     if( bPkOnly && isPK==0 ) continue;
 
-    assert( eType==SQLITE_INTEGER || eType==SQLITE_FLOAT 
-         || eType==SQLITE_TEXT || eType==SQLITE_BLOB 
-         || eType==SQLITE_NULL || eType==0 
-    );
-
     if( isPK ){
-      a++;
+      int eType = *a++;
+
+      assert( eType==SQLITE_INTEGER || eType==SQLITE_FLOAT 
+           || eType==SQLITE_TEXT || eType==SQLITE_BLOB 
+           || eType==SQLITE_NULL || eType==0 
+      );
+
       h = sessionHashAppendType(h, eType);
       if( eType==SQLITE_INTEGER || eType==SQLITE_FLOAT ){
         h = sessionHashAppendI64(h, sessionGetI64(a));
@@ -1544,6 +1547,16 @@ static int sessionPrepareDfltStmt(
   return rc;
 }
 
+/*
+** Finalize statement pStmt. If (*pRc) is SQLITE_OK when this function is
+** called, set it to the results of the sqlite3_finalize() call. Or, if
+** it is already set to an error code, leave it as is.
+*/
+static void sessionFinalizeStmt(sqlite3_stmt *pStmt, int *pRc){
+  int rc = sqlite3_finalize(pStmt);
+  if( *pRc==SQLITE_OK ) *pRc = rc;
+}
+
 /*
 ** Table pTab has one or more existing change-records with old.* records
 ** with fewer than pTab->nCol columns. This function updates all such 
@@ -1566,9 +1579,8 @@ static int sessionUpdateChanges(sqlite3_session *pSession, SessionTable *pTab){
     }
   }
 
+  sessionFinalizeStmt(pStmt, &rc);
   pSession->rc = rc;
-  rc = sqlite3_finalize(pStmt);
-  if( pSession->rc==SQLITE_OK ) pSession->rc = rc;
   return pSession->rc;
 }
 
@@ -2136,7 +2148,7 @@ static int sessionDiffFindNew(
     rc = SQLITE_NOMEM;
   }else{
     sqlite3_stmt *pStmt;
-    rc = sqlite3_prepare(pSession->db, zStmt, -1, &pStmt, 0);
+    rc = sqlite3_prepare_v2(pSession->db, zStmt, -1, &pStmt, 0);
     if( rc==SQLITE_OK ){
       SessionDiffCtx *pDiffCtx = (SessionDiffCtx*)pSession->hook.pCtx;
       pDiffCtx->pStmt = pStmt;
@@ -2199,7 +2211,7 @@ static int sessionDiffFindModified(
       rc = SQLITE_NOMEM;
     }else{
       sqlite3_stmt *pStmt;
-      rc = sqlite3_prepare(pSession->db, zStmt, -1, &pStmt, 0);
+      rc = sqlite3_prepare_v2(pSession->db, zStmt, -1, &pStmt, 0);
 
       if( rc==SQLITE_OK ){
         SessionDiffCtx *pDiffCtx = (SessionDiffCtx*)pSession->hook.pCtx;
@@ -2894,11 +2906,11 @@ static int sessionSelectStmt(
     );
     sessionAppendStr(&cols, "tbl, ?2, stat", &rc);
   }else{
-  #if 0
+#if 0
     if( bRowid ){
       sessionAppendStr(&cols, SESSIONS_ROWID, &rc);
     }
-    #endif
+#endif
     for(i=0; i<nCol; i++){
       if( cols.nBuf ) sessionAppendStr(&cols, ", ", &rc);
       sessionAppendIdent(&cols, azCol[i], &rc);
@@ -3693,18 +3705,24 @@ static int sessionChangesetBufferRecord(
     int eType;
     rc = sessionInputBuffer(pIn, nByte + 10);
     if( rc==SQLITE_OK ){
-      eType = pIn->aData[pIn->iNext + nByte++];
-      if( eType==SQLITE_TEXT || eType==SQLITE_BLOB ){
-        int n;
-        int nRem = pIn->nData - (pIn->iNext + nByte);
-        nByte += sessionVarintGetSafe(&pIn->aData[pIn->iNext+nByte], nRem, &n);
-        nByte += n;
-        rc = sessionInputBuffer(pIn, nByte);
-      }else if( eType==SQLITE_INTEGER || eType==SQLITE_FLOAT ){
-        nByte += 8;
+      if( pIn->iNext+nByte>=pIn->nData ){
+        rc = SQLITE_CORRUPT_BKPT;
+      }else{
+        eType = pIn->aData[pIn->iNext + nByte++];
+        if( eType==SQLITE_TEXT || eType==SQLITE_BLOB ){
+          int n;
+          int nRem = pIn->nData - (pIn->iNext + nByte);
+          nByte += sessionVarintGetSafe(&pIn->aData[pIn->iNext+nByte], nRem,&n);
+          nByte += n;
+          rc = sessionInputBuffer(pIn, nByte);
+        }else if( eType==SQLITE_INTEGER || eType==SQLITE_FLOAT ){
+          nByte += 8;
+        }else if( eType!=0 && eType!=SQLITE_NULL ){
+          rc = SQLITE_CORRUPT_BKPT;
+        }
       }
     }
-    if( (pIn->iNext+nByte)>pIn->nData ){
+    if( rc==SQLITE_OK && (pIn->iNext+nByte)>pIn->nData ){
       rc = SQLITE_CORRUPT_BKPT;
     }
   }
@@ -4346,6 +4364,7 @@ struct SessionApplyCtx {
   u8 bRebaseStarted;              /* If table header is already in rebase */
   u8 bRebase;                     /* True to collect rebase information */
   u8 bIgnoreNoop;                 /* True to ignore no-op conflicts */
+  u8 bNoUpdateLoop;               /* No update-loop processing */
   int bRowid;
   char *zErr;                     /* Error message, if any */
 };
@@ -4919,7 +4938,7 @@ static int sessionConflictHandler(
       u8 *aBlob = &pIter->in.aData[pIter->in.iCurrent];
       int nBlob = pIter->in.iNext - pIter->in.iCurrent;
       sessionAppendBlob(&p->constraints, aBlob, nBlob, &rc);
-      return SQLITE_OK;
+      return rc;
     }else if( p->bIgnoreNoop==0 || op!=SQLITE_DELETE 
            || eType==SQLITE_CHANGESET_CONFLICT 
     ){
@@ -5041,7 +5060,7 @@ static int sessionApplyOneOp(
     for(i=0; rc==SQLITE_OK && i<nCol; i++){
       sqlite3_value *pOld = sessionChangesetOld(pIter, i);
       sqlite3_value *pNew = sessionChangesetNew(pIter, i);
-      if( p->abPK[i] || (bPatchset==0 && pOld) ){
+      if( pOld && (p->abPK[i] || bPatchset==0) ){
         rc = sessionBindValue(pUp, i*2+2, pOld);
       }
       if( rc==SQLITE_OK && pNew ){
@@ -5167,7 +5186,264 @@ static int sessionApplyOneWithRetry(
 }
 
 /*
-** Retry the changes accumulated in the pApply->constraints buffer.
+** Create an iterator to iterate through the retry buffer pRetry.
+*/
+static int sessionRetryIterInit(
+  SessionBuffer *pRetry,          /* Buffer to iterate through */
+  int bPatchset,                  /* True for patchset, false for changeset */
+  const char *zTab,               /* Table name */
+  SessionApplyCtx *pApply,        /* Session apply context */
+  sqlite3_changeset_iter **ppIter /* OUT: New iterator */
+){
+  sqlite3_changeset_iter *pRet = 0;
+  int rc = SQLITE_OK;
+
+  rc = sessionChangesetStart(
+      &pRet, 0, 0, pRetry->nBuf, pRetry->aBuf, pApply->bInvertConstraints, 1
+  );
+  if( rc==SQLITE_OK ){
+    size_t nByte = 2*pApply->nCol*sizeof(sqlite3_value*);
+    pRet->bPatchset = bPatchset;
+    pRet->zTab = (char*)zTab;
+    pRet->nCol = pApply->nCol;
+    pRet->abPK = pApply->abPK;
+    sessionBufferGrow(&pRet->tblhdr, nByte, &rc);
+    pRet->apValue = (sqlite3_value**)pRet->tblhdr.aBuf;
+    if( rc==SQLITE_OK ){
+      memset(pRet->apValue, 0, nByte);
+    }else{
+      sqlite3changeset_finalize(pRet);
+      pRet = 0;
+    }
+  }
+
+  *ppIter = pRet;
+  return rc;
+}
+
+/*
+** Attempt to apply all the changes in retry buffer pRetry to the database.
+** Except, if parameter iSkip is greater than or equal to 0, skip change 
+** iSkip.
+*/
+static int sessionApplyRetryBuffer(
+  SessionBuffer *pRetry,          /* Buffer to apply changes from */
+  int iSkip,                      /* If >=0, index of change to omit */
+  sqlite3 *db,                    /* Database handle */
+  int bPatchset,                  /* True for patchset, false for changeset */
+  const char *zTab,               /* Name of table to write to */
+  SessionApplyCtx *pApply,        /* Apply context */
+  int(*xConflict)(void*, int, sqlite3_changeset_iter*),
+  void *pCtx                      /* First argument passed to xConflict */
+){
+  int rc = SQLITE_OK;
+  int rc2 = SQLITE_OK;
+  int ii = 0;
+  sqlite3_changeset_iter *pIter = 0;
+
+  assert( pApply->constraints.nBuf==0 );
+
+  rc = sessionRetryIterInit(pRetry, bPatchset, zTab, pApply, &pIter);
+
+  for(ii=0; rc==SQLITE_OK && SQLITE_ROW==sqlite3changeset_next(pIter); ii++){
+    if( ii!=iSkip ){
+      rc = sessionApplyOneWithRetry(db, pIter, pApply, xConflict, pCtx);
+    }
+  }
+
+  rc2 = sqlite3changeset_finalize(pIter);
+  if( rc==SQLITE_OK ) rc = rc2;
+  assert( pApply->bDeferConstraints || pApply->constraints.nBuf==0 );
+
+  return rc;
+}
+
+/*
+** Check if table zTab in the "main" database of db is a WITHOUT ROWID
+** table. 
+**
+** If no error occurs, return SQLITE_OK and set output variable (*pbWR) to 
+** true if zTab is a WITHOUT ROWID table, or false otherwise. Or, if an
+** error does occur, return an SQLite error code. The final value of (*pbWR)
+** is undefined in this case.
+*/
+static int sessionTableIsWithoutRowid(sqlite3 *db, const char *zTab, int *pbWR){
+  sqlite3_stmt *pList = 0;
+  char *zSql = 0;
+  int rc = SQLITE_OK;
+
+  zSql = sqlite3_mprintf("PRAGMA table_list = %Q", zTab);
+  if( zSql==0 ){
+    rc = SQLITE_NOMEM;
+  }else{
+    rc = sqlite3_prepare_v2(db, zSql, -1, &pList, 0);
+    sqlite3_free(zSql);
+  }
+
+  if( rc==SQLITE_OK ){
+    sqlite3_step(pList);
+    *pbWR = sqlite3_column_int(pList, 4);
+    rc = sqlite3_finalize(pList);
+  }
+
+  return rc;
+}
+
+/*
+** Iterator pUp points to an UPDATE change. This function deletes the 
+** affected row from the database and creates an INSERT statement that
+** may be used to reinsert the row as it is after the UPDATE change
+** has been applied.
+**
+** If successful, SQLITE_OK is returned and output variable (*ppInsert)
+** is left pointing to a prepared INSERT statement. It is the responsibility
+** of the caller to eventually free this statement using sqlite3_finalize().
+** Or, if an error occurs, an SQLite error code is returned and (*ppInsert)
+** set to NULL. pApply->zErr may be set to an error message in this case.
+*/
+static int sessionUpdateToDeleteInsert(
+  sqlite3 *db,                    /* Database to write to */
+  const char *zTab,               /* Table name */
+  SessionApplyCtx *pApply,        /* Apply context */
+  sqlite3_changeset_iter *pUp,    /* Iterator pointing to UPDATE change */
+  sqlite3_stmt **ppInsert         /* OUT: INSERT statement */
+){
+  sqlite3_stmt *pRet = 0;         /* The INSERT statement */
+  sqlite3_stmt *pSelect = 0;      /* SELECT to read current values of row */
+  int rc = SQLITE_OK;
+  int bWR = 0;
+
+  rc = sessionTableIsWithoutRowid(db, zTab, &bWR);
+  if( rc==SQLITE_OK ){
+    char *zSelect = 0;
+    char *zInsert = 0;
+    SessionBuffer cols = {0, 0, 0};
+    SessionBuffer insbind = {0, 0, 0};
+    SessionBuffer pkcols = {0, 0, 0};
+    SessionBuffer selbind = {0, 0, 0};
+
+    const char *zComma = "";
+    const char *zComma2 = "";
+    int ii;
+    for(ii=0; ii<pApply->nCol; ii++){
+      sessionAppendStr(&cols, zComma, &rc);
+      sessionAppendIdent(&cols, pApply->azCol[ii], &rc);
+      sessionAppendStr(&insbind, zComma, &rc);
+      sessionAppendStr(&insbind, "?", &rc);
+      zComma = ", ";
+
+      if( pApply->abPK[ii] ){
+        sessionAppendStr(&pkcols, zComma2, &rc);
+        sessionAppendIdent(&pkcols, pApply->azCol[ii], &rc);
+        sessionAppendStr(&selbind, zComma2, &rc);
+        sessionAppendPrintf(&selbind, &rc, "?%d", ii+1);
+        zComma2 = ", ";
+      }
+    }
+    if( bWR==0 ){
+      sessionAppendStr(&cols, zComma, &rc);
+      sessionAppendStr(&cols, SESSIONS_ROWID, &rc);
+      sessionAppendStr(&insbind, zComma, &rc);
+      sessionAppendStr(&insbind, "?", &rc);
+    }
+
+    if( rc==SQLITE_OK ){
+      zSelect = sqlite3_mprintf("SELECT %s FROM %Q WHERE (%s) IS (%s)",
+          cols.aBuf, zTab, pkcols.aBuf, selbind.aBuf
+      );
+      if( zSelect==0 ) rc = SQLITE_NOMEM;
+    }
+    if( rc==SQLITE_OK ){
+      zInsert = sqlite3_mprintf("INSERT INTO %Q(%s) VALUES(%s)",
+          zTab, cols.aBuf, insbind.aBuf
+      );
+      if( zInsert==0 ) rc = SQLITE_NOMEM;
+    }
+
+    if( rc==SQLITE_OK ){
+      rc = sessionPrepare(db, &pSelect, &pApply->zErr, zSelect);
+    }
+    if( rc==SQLITE_OK ){
+      rc = sessionPrepare(db, &pRet, &pApply->zErr, zInsert);
+    }
+
+    sqlite3_free(zSelect);
+    sqlite3_free(zInsert);
+    sqlite3_free(cols.aBuf);
+    sqlite3_free(insbind.aBuf);
+    sqlite3_free(pkcols.aBuf);
+    sqlite3_free(selbind.aBuf);
+  }
+
+  if( rc==SQLITE_OK ){
+    rc = sessionBindRow(
+        pUp, sqlite3changeset_old, pApply->nCol, pApply->abPK, pSelect
+    );
+  }
+
+  if( rc==SQLITE_OK && sqlite3_step(pSelect)==SQLITE_ROW ){
+    int iCol;
+    for(iCol=0; iCol<pApply->nCol; iCol++){
+      sqlite3_value *pVal = pUp->apValue[iCol+pApply->nCol];
+      if( pVal==0 ){
+        pVal = sqlite3_column_value(pSelect, iCol);
+      }
+      rc = sqlite3_bind_value(pRet, iCol+1, pVal);
+    }
+    if( bWR==0 ){
+      sqlite3_bind_int64(pRet, iCol+1, sqlite3_column_int64(pSelect, iCol));
+    }
+  }
+  sessionFinalizeStmt(pSelect, &rc);
+
+  /* Delete the row from the database. */
+  if( rc==SQLITE_OK ){
+    rc = sessionBindRow(
+        pUp, sqlite3changeset_old, pApply->nCol, pApply->abPK, pApply->pDelete
+    );
+    sqlite3_bind_int(pApply->pDelete, pApply->nCol+1, 1);
+  }
+  if( rc==SQLITE_OK ){
+    sqlite3_step(pApply->pDelete);
+    rc = sqlite3_reset(pApply->pDelete);
+  }
+
+  if( rc!=SQLITE_OK ){
+    sqlite3_finalize(pRet);
+    pRet = 0;
+  }
+
+  *ppInsert = pRet;
+  return rc;
+}
+
+/*
+** Retry the changes accumulated in the pApply->constraints buffer. The
+** pApply->constraints buffer contains all changes to table zTab that
+** could not be applied due to SQLITE_CONSTRAINT errors. This function
+** attempts to apply them as follows:
+**
+**   1) It runs through the buffer and attempts to retry each change,
+**      removing any that are successfully applied from the buffer. This
+**      is repeated until no further progress can be made.
+**
+**   2) For each UPDATE change in the buffer, try the following in a
+**      savepoint transaction:
+**
+**      a) DELETE the affected row,
+**      b) Attempt step (1) with remaining changes,
+**      c) Attempt to INSERT a row equivalent to the one that would be
+**         created by applying this UPDATE change.
+**
+**      If the INSERT in (c) succeeds, the savepoint is committed and all
+**      successfully applied changes are removed from the buffer. Step (2)
+**      is then repeated.
+**
+**   3) Once step (2) has been attempted for each UPDATE in the change,
+**      a final attempt is made to apply each remaining change. This time,
+**      if an SQLITE_CONSTRAINT error is encountered, the conflict handler
+**      is invoked and the user has to decide whether to omit the change
+**      or rollback the entire _apply() operation.
 */
 static int sessionRetryConstraints(
   sqlite3 *db, 
@@ -5178,41 +5454,101 @@ static int sessionRetryConstraints(
   void *pCtx                      /* First argument passed to xConflict */
 ){
   int rc = SQLITE_OK;
+  int iUpdate = 0;
 
+  /* Step (1) */
   while( pApply->constraints.nBuf ){
-    sqlite3_changeset_iter *pIter2 = 0;
     SessionBuffer cons = pApply->constraints;
     memset(&pApply->constraints, 0, sizeof(SessionBuffer));
 
-    rc = sessionChangesetStart(
-        &pIter2, 0, 0, cons.nBuf, cons.aBuf, pApply->bInvertConstraints, 1
+    rc = sessionApplyRetryBuffer(
+        &cons, -1, db, bPatchset, zTab, pApply, xConflict, pCtx
     );
-    if( rc==SQLITE_OK ){
-      size_t nByte = 2*pApply->nCol*sizeof(sqlite3_value*);
-      int rc2;
-      pIter2->bPatchset = bPatchset;
-      pIter2->zTab = (char*)zTab;
-      pIter2->nCol = pApply->nCol;
-      pIter2->abPK = pApply->abPK;
-      sessionBufferGrow(&pIter2->tblhdr, nByte, &rc);
-      pIter2->apValue = (sqlite3_value**)pIter2->tblhdr.aBuf;
-      if( rc==SQLITE_OK ) memset(pIter2->apValue, 0, nByte);
-
-      while( rc==SQLITE_OK && SQLITE_ROW==sqlite3changeset_next(pIter2) ){
-        rc = sessionApplyOneWithRetry(db, pIter2, pApply, xConflict, pCtx);
-      }
-
-      rc2 = sqlite3changeset_finalize(pIter2);
-      if( rc==SQLITE_OK ) rc = rc2;
-    }
-    assert( pApply->bDeferConstraints || pApply->constraints.nBuf==0 );
 
     sqlite3_free(cons.aBuf);
     if( rc!=SQLITE_OK ) break;
-    if( pApply->constraints.nBuf>=cons.nBuf ){
-      /* No progress was made on the last round. */
-      pApply->bDeferConstraints = 0;
+
+    /* If no progress has been made this round, break out of the loop. */
+    if( pApply->constraints.nBuf>=cons.nBuf ) break;
+  }
+
+  /* Step (2) */
+  while( rc==SQLITE_OK && pApply->constraints.nBuf && !pApply->bNoUpdateLoop ){
+    SessionBuffer cons = {0, 0, 0};
+    sqlite3_changeset_iter *pUp = 0;
+    sqlite3_stmt *pInsert = 0;
+    int iSkip = 0;
+
+    rc = sessionRetryIterInit(
+        &pApply->constraints, bPatchset, zTab, pApply, &pUp
+    );
+    if( rc==SQLITE_OK ){
+      int iThis = -1;
+      while( SQLITE_ROW==sqlite3changeset_next(pUp) ){
+        if( pUp->op==SQLITE_UPDATE ) iThis++;
+        if( iThis==iUpdate ) break;
+        iSkip++;
+      }
+      if( iThis==iUpdate ){
+        rc = sqlite3_exec(db, "SAVEPOINT update_op", 0, 0, 0);
+        if( rc==SQLITE_OK ){
+          rc = sessionUpdateToDeleteInsert(db, zTab, pApply, pUp, &pInsert);
+        }
+      }
+      sqlite3changeset_finalize(pUp);
+      if( iThis!=iUpdate ) break;
     }
+
+    if( rc==SQLITE_OK ){
+      cons = pApply->constraints;
+
+      while( rc==SQLITE_OK && pApply->constraints.nBuf>0 ){
+        SessionBuffer app = pApply->constraints;
+        memset(&pApply->constraints, 0, sizeof(SessionBuffer));
+        rc = sessionApplyRetryBuffer(
+            &app, iSkip, db, bPatchset, zTab, pApply, xConflict, pCtx
+        );
+        if( app.aBuf!=cons.aBuf ){
+          sqlite3_free(app.aBuf);
+        }
+        if( pApply->constraints.nBuf>=app.nBuf ){
+          break;
+        }
+        iSkip = -1;
+      }
+    }
+
+    iUpdate++;
+    if( rc==SQLITE_OK ){
+      sqlite3_step(pInsert);
+      rc = sqlite3_finalize(pInsert);
+      if( rc==SQLITE_CONSTRAINT ){
+        rc = sqlite3_exec(db, "ROLLBACK TO update_op", 0, 0, 0);
+        sqlite3_free(pApply->constraints.aBuf);
+        pApply->constraints = cons;
+        memset(&cons, 0, sizeof(cons));
+      }else if( rc==SQLITE_OK ){
+        iUpdate = 0;
+      }
+      if( rc==SQLITE_OK ){
+        rc = sqlite3_exec(db, "RELEASE update_op", 0, 0, 0);
+      }
+    }else{
+      sqlite3_finalize(pInsert);
+    }
+
+    sqlite3_free(cons.aBuf);
+  }
+
+  /* Step (3) */
+  if( rc==SQLITE_OK && pApply->constraints.nBuf ){
+    SessionBuffer cons = pApply->constraints;
+    memset(&pApply->constraints, 0, sizeof(SessionBuffer));
+    pApply->bDeferConstraints = 0;
+    rc = sessionApplyRetryBuffer(
+        &cons, -1, db, bPatchset, zTab, pApply, xConflict, pCtx
+    );
+    sqlite3_free(cons.aBuf);
   }
 
   return rc;
@@ -5266,6 +5602,7 @@ static int sessionChangesetApply(
   sApply.bRebase = (ppRebase && pnRebase);
   sApply.bInvertConstraints = !!(flags & SQLITE_CHANGESETAPPLY_INVERT);
   sApply.bIgnoreNoop = !!(flags & SQLITE_CHANGESETAPPLY_IGNORENOOP);
+  sApply.bNoUpdateLoop = !!(flags & SQLITE_CHANGESETAPPLY_NOUPDATELOOP);
   if( (flags & SQLITE_CHANGESETAPPLY_NOSAVEPOINT)==0 ){
     rc = sqlite3_exec(db, "SAVEPOINT changeset_apply", 0, 0, 0);
   }
@@ -7050,7 +7387,7 @@ int sqlite3changegroup_change_text(
   const char *pVal, 
   int nVal
 ){
-  int nText = nVal>=0 ? nVal : strlen(pVal);
+  sqlite3_int64 nText = nVal>=0 ? nVal : strlen(pVal);
   sqlite3_int64 nByte = 1 + sessionVarintLen(nText) + nText;
   int rc = SQLITE_OK;
   SessionBuffer *pBuf = 0;
@@ -7102,6 +7439,7 @@ int sqlite3changegroup_change_finish(
   char **pzErr
 ){
   int rc = SQLITE_OK;
+  char *zErr = 0;
   if( pGrp->cd.pTab ){
     SessionBuffer *aBuf = pGrp->cd.aBuf;
     int ii;
@@ -7113,14 +7451,14 @@ int sqlite3changegroup_change_finish(
         for(ii=0; ii<nBuf; ii++){
           if( pGrp->cd.pTab->abPK[ii] ){
             if( aBuf[ii].nBuf<=1 ){
-              *pzErr = sqlite3_mprintf(
+              zErr = sqlite3_mprintf(
                   "invalid change: %s value in PK of old.* record",
                   aBuf[ii].nBuf==1 ? "null" : "undefined"
               );
               rc = SQLITE_ERROR;
               break;
             }else if( aBuf[ii + nBuf].nBuf>0 ){
-              *pzErr = sqlite3_mprintf(
+              zErr = sqlite3_mprintf(
                   "invalid change: defined value in PK of new.* record"
               );
               rc = SQLITE_ERROR;
@@ -7128,7 +7466,7 @@ int sqlite3changegroup_change_finish(
             }
           }else 
           if( pGrp->bPatch==0 && (aBuf[ii].nBuf>0)!=(aBuf[ii+nBuf].nBuf>0) ){
-            *pzErr = sqlite3_mprintf(
+            zErr = sqlite3_mprintf(
                 "invalid change: column %d "
                 "- old.* value is %sdefined but new.* is %sdefined",
                 ii, aBuf[ii].nBuf ? "" : "un", aBuf[ii+nBuf].nBuf ? "" : "un"
@@ -7145,14 +7483,14 @@ int sqlite3changegroup_change_finish(
           if( (pGrp->cd.eOp==SQLITE_INSERT || pGrp->bPatch==0 || isPK)
            && aBuf[ii].nBuf==0
           ){
-            *pzErr = sqlite3_mprintf(
+            zErr = sqlite3_mprintf(
                 "invalid change: column %d is undefined", ii
             );
             rc = SQLITE_ERROR;
             break;
           }
           if( aBuf[ii].nBuf==1 && isPK ){
-            *pzErr = sqlite3_mprintf(
+            zErr = sqlite3_mprintf(
                 "invalid change: null value in PK"
             );
             rc = SQLITE_ERROR;
@@ -7202,6 +7540,11 @@ int sqlite3changegroup_change_finish(
     pGrp->cd.pTab = 0;
   }
 
+  if( pzErr ){
+    *pzErr = zErr;
+  }else{
+    sqlite3_free(zErr);
+  }
   return rc;
 }
 

ext/session/sqlite3session.h

@@ -1366,11 +1366,23 @@ int sqlite3changeset_apply_v3(
 **   database behave as if they were declared with "ON UPDATE NO ACTION ON
 **   DELETE NO ACTION", even if they are actually CASCADE, RESTRICT, SET NULL
 **   or SET DEFAULT.
+**
+** <dt>SQLITE_CHANGESETAPPLY_NOUPDATELOOP <dd>
+**   Sometimes, a changeset contains two or more update statements such that
+**   although after applying all updates the database will contain no 
+**   constraint violations, no single update can be applied before the others.
+**   The simplest example of this is a pair of UPDATEs that have "swapped"
+**   two column values with a UNIQUE constraint.
+**   <p>
+**   Usually, sqlite3changeset_apply() and similar functions work hard to try
+**   to find a way to apply such a changeset. However, if this flag is set,
+**   then all such updates are considered CONSTRAINT conflicts.
 */
 #define SQLITE_CHANGESETAPPLY_NOSAVEPOINT   0x0001
 #define SQLITE_CHANGESETAPPLY_INVERT        0x0002
 #define SQLITE_CHANGESETAPPLY_IGNORENOOP    0x0004
 #define SQLITE_CHANGESETAPPLY_FKNOACTION    0x0008
+#define SQLITE_CHANGESETAPPLY_NOUPDATELOOP  0x0010
 
 /* 
 ** CAPI3REF: Constants Passed To The Conflict Handler

ext/session/test_session.c

@@ -914,6 +914,9 @@ static int SQLITE_TCLAPI testSqlite3changesetApply(
       }
       else if( n>2 && n<=11 && 0==sqlite3_strnicmp("-ignorenoop", z1, n) ){
         flags |= SQLITE_CHANGESETAPPLY_IGNORENOOP;
+      }
+      else if( n>3 && n<=13 && 0==sqlite3_strnicmp("-noupdateloop", z1, n) ){
+        flags |= SQLITE_CHANGESETAPPLY_NOUPDATELOOP;
       }else{
         break;
       }
@@ -1615,10 +1618,11 @@ static int SQLITE_TCLAPI test_changegroup_cmd(
     { "change_text",     3, "[new|old] ICOL VALUE" },    /* 9 */
     { "change_blob",     3, "[new|old] ICOL VALUE" },    /* 10 */
     { "change_finish",   1, "BDISCARD"             },    /* 11 */
+    { "change_finishne", 1, "BDISCARD"             },    /* 12 */
 
-    { "config",          2, "OPTION INTVAL"        },    /* 12 */
-    { "change_text-1",   3, "[new|old] ICOL VALUE" },    /* 13 */
-    { "change_begin_ne", 3, "TYPE TABLE INDIRECT"  },    /* 14 */
+    { "config",          2, "OPTION INTVAL"        },    /* 13 */
+    { "change_text-1",   3, "[new|old] ICOL VALUE" },    /* 14 */
+    { "change_begin_ne", 3, "TYPE TABLE INDIRECT"  },    /* 15 */
     { 0, 0, 0 }
   };
   int rc = TCL_OK;
@@ -1651,9 +1655,10 @@ static int SQLITE_TCLAPI test_changegroup_cmd(
 
     case 1: {      /* add */
       Tcl_Size nByte = 0;
-      const u8 *aByte = Tcl_GetByteArrayFromObj(objv[2], &nByte);
-      rc = sqlite3changegroup_add(p->pGrp, (int)nByte, (void*)aByte);
+      void *aByte = testGetByteArrayFromObj(objv[2], &nByte);
+      rc = sqlite3changegroup_add(p->pGrp, (int)nByte, aByte);
       if( rc!=SQLITE_OK ) rc = test_session_error(interp, rc, 0);
+      free(aByte);
       break;
     };
 
@@ -1688,7 +1693,7 @@ static int SQLITE_TCLAPI test_changegroup_cmd(
       break;
     };
 
-    case 14:        /* change_beginne */
+    case 15:        /* change_beginne */
     case 5: {       /* change_begin */
       struct ChangeType {
         const char *zType;
@@ -1815,13 +1820,16 @@ static int SQLITE_TCLAPI test_changegroup_cmd(
       break;
     }
 
+    case 12:        /* change_finishne */
     case 11: {      /* change_finish */
       int bDiscard = 0;
       if( TCL_OK!=Tcl_GetBooleanFromObj(interp, objv[2], &bDiscard) ){
         rc = TCL_ERROR;
       }else{
         char *zErr = 0;
-        rc = sqlite3changegroup_change_finish(p->pGrp, bDiscard, &zErr);
+        char **pz = &zErr;
+        if( iSub==12 ) pz = 0;
+        rc = sqlite3changegroup_change_finish(p->pGrp, bDiscard, pz);
         if( rc!=SQLITE_OK ){
           rc = test_session_error(interp, rc, zErr);
         }
@@ -1829,7 +1837,7 @@ static int SQLITE_TCLAPI test_changegroup_cmd(
       break;
     }
 
-    case 12: {      /* config */
+    case 13: {      /* config */
       struct OptionName {
         const char *zOpt;
         int op;
@@ -1858,7 +1866,7 @@ static int SQLITE_TCLAPI test_changegroup_cmd(
       break;
     }
 
-    case 13: {      /* change_text-1 */
+    case 14: {      /* change_text-1 */
       int bNew = 0;
       int iCol = 0;
       if( TCL_OK!=testGetNewOrOld(interp, objv[2], &bNew)

ext/wasm/GNUmakefile

@@ -352,7 +352,7 @@ else
     SQLITE_C_IS_SEE = 0
   else
     SQLITE_C_IS_SEE = 1
-    $(info This is an SEE build)
+    $(info $(emo.lock)$(emo.lock)$(emo.lock) This is an SEE build $(emo.lock)$(emo.lock)$(emo.lock))
   endif
 endif
 

ext/wasm/api/EXPORTED_FUNCTIONS.c-pp

@@ -245,4 +245,5 @@ _fiddle_reset_db
 _fiddle_db_handle
 _fiddle_db_vfs
 _fiddle_export_db
+_fiddle_get_prompt
 //#/if fiddle

ext/wasm/api/opfs-common-shared.c-pp.js

@@ -363,11 +363,15 @@ globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
      called this way, the resolved value of the returned Promise is
      the number of bytes written to the target file.
 
-     It very specifically requires the input to be an SQLite3
-     database and throws if that's not the case.  It does so in
-     order to prevent this function from taking on a larger scope
-     than it is specifically intended to. i.e. we do not want it to
-     become a convenience for importing arbitrary files into OPFS.
+     It very specifically requires the input to be an SQLite3 database
+     and throws if that's not the case.  It does so in order to
+     prevent this function from taking on a larger scope than it is
+     specifically intended to. i.e. we do not want it to become a
+     convenience for importing arbitrary files into OPFS.  Caveat: as
+     of 3.54 in SEE builds, the "is this a db?" check is necessarily
+     lax to account for SEE-encrypted databases not having a legible
+     header. In such builds, only the db size is relevant for the
+     check.
 
      This routine rewrites the database header bytes in the output
      file (not the input array) to force disabling of WAL mode.
@@ -1099,20 +1103,21 @@ globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
           return promiseResolve_(sqlite3);
         };
         const options = opfsUtil.options;
-        let proxyUri = options.proxyUri +(
+//#if not target:es6-bundler-friendly
+        const proxyUri = options.proxyUri +(
           (options.proxyUri.indexOf('?')<0) ? '?' : '&'
         )+'vfs='+vfsName;
         //sqlite3.config.error("proxyUri",options.proxyUri, (new Error()));
+//#/if
         const W = opfsVfs.worker =
 //#if target:es6-bundler-friendly
               (()=>{
                 /* _Sigh_... */
-                switch(vfsName){
-                  case 'opfs':
-                    return new Worker(new URL("sqlite3-opfs-async-proxy.js?vfs=opfs", import.meta.url));
-                  case 'opfs-wl':
-                    return new Worker(new URL("sqlite3-opfs-async-proxy.js?vfs=opfs-wl", import.meta.url));
-                }
+                /* Discussion explaining this formulation:
+                   https://github.com/sqlite/sqlite-wasm/pull/159 */
+                const url = new URL('sqlite3-opfs-async-proxy.js', import.meta.url);
+                url.searchParams.set('vfs', vfsName);
+                return new Worker(url.toString());
               })();
 //#elif target:es6-module
         new Worker(new URL(proxyUri, import.meta.url));

ext/wasm/api/sqlite3-api-prologue.js

@@ -771,7 +771,11 @@ globalThis.sqlite3ApiBootstrap = async function sqlite3ApiBootstrap(
        lead bytes of that buffer do not hold a SQLite3 database header,
        else it returns without side effects.
 
-       Added in 3.44.
+       Added in 3.44. As of 3.54 in SEE builds it performs only a
+       rudimentary length check and does not fail for invalid header
+       bytes, under the assumption that the input may be an encrypted
+       db. We cannot unambiguously distinguish an encrypted db from
+       garbage bytes.
     */
     affirmDbHeader: function(bytes){
       if(bytes instanceof ArrayBuffer) bytes = new Uint8Array(bytes);
@@ -781,7 +785,12 @@ globalThis.sqlite3ApiBootstrap = async function sqlite3ApiBootstrap(
       }
       for(let i = 0; i < header.length; ++i){
         if( header.charCodeAt(i) !== bytes[i] ){
+//#if enable-see
+          break /* assume this might be an encrypted db.
+                   https://sqlite.org/see/forumpost/f84bef3552 */;
+//#else
           toss3("Input does not contain an SQLite3 database header.");
+//#/if
         }
       }
     },
@@ -791,7 +800,8 @@ globalThis.sqlite3ApiBootstrap = async function sqlite3ApiBootstrap(
        database. It only examines the size and header, but further
        checks may be added in the future.
 
-       Added in 3.44.
+       Added in 3.44. See notes in affirmDbHeader() regarding SEE
+       builds.
     */
     affirmIsDb: function(bytes){
       if(bytes instanceof ArrayBuffer) bytes = new Uint8Array(bytes);

ext/wasm/api/sqlite3-vfs-opfs-sahpool.c-pp.js

@@ -1040,19 +1040,11 @@ globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     importDb(name, bytes){
       if( bytes instanceof ArrayBuffer ) bytes = new Uint8Array(bytes);
       else if( bytes instanceof Function ) return this.importDbChunked(name, bytes);
+      util.affirmIsDb(bytes);
       const sah = this.#mapFilenameToSAH.get(name)
             || this.nextAvailableSAH()
             || toss("No available handles to import to.");
       const n = bytes.byteLength;
-      if(n<512 || n%512!=0){
-        toss("Byte array size is invalid for an SQLite db.");
-      }
-      const header = "SQLite format 3";
-      for(let i = 0; i < header.length; ++i){
-        if( header.charCodeAt(i) !== bytes[i] ){
-          toss("Input does not contain an SQLite database header.");
-        }
-      }
       const nWrote = sah.write(bytes, {at: HEADER_OFFSET_DATA});
       if(nWrote != n){
         this.setAssociatedPath(sah, '', 0);

ext/wasm/fiddle/fiddle-worker.js

@@ -172,7 +172,7 @@
       if(capi.sqlite3_vfs_find("opfs")){
         stdout("\nOPFS is available. To open a persistent db, use:\n\n",
                "  .open file:name?vfs=opfs\n\nbut note that some",
-               "features (e.g. upload) do not yet work with OPFS.");
+               "features (e.g. upload) do not work with OPFS.");
       }
       stdout('\nEnter ".help" for usage hints.');
       return true;
@@ -186,6 +186,7 @@
       if(!f._){
         if(!this.runMain()) return;
         f._ = sqlite3.wasm.xWrap('fiddle_exec', undefined, ['string']);
+        f.getPrompt = sqlite3.wasm.xWrap('fiddle_get_prompt', 'string:dealloc', []);
       }
       if(fiddleModule.isDead){
         stderr("shell module has exit()ed. Cannot run SQL.");
@@ -207,7 +208,8 @@
         wMsg('working','end');
         wMsg('wasm-info', {
           pointerSize: sqlite3.wasm.ptr.size,
-          heapSize: sqlite3.wasm.heap8().byteLength
+          heapSize: sqlite3.wasm.heap8().byteLength,
+          prompt: f.getPrompt()
         });
       }
     },

ext/wasm/fiddle/fiddle.js

@@ -349,9 +349,10 @@
     SF.e.wasmInfo.innerText = 'WASM: '+(
       4===v.pointerSize ? 32 : 64
     )+'-bit'
-    //+' heap size: '+Number(v.heapSize)
+    +' heap: '+Number(v.heapSize)
     // Heap size is not changing even when loading a huge db?
     ;
+    SF.jqTerm?.set_prompt?.(v.prompt);
   });
 
   /* querySelectorAll() proxy */
@@ -865,8 +866,14 @@
       const jqeTerm = window.jQuery(SF.e.terminal).empty();
       SF.jqTerm = jqeTerm.terminal(SF.dbExec.bind(SF),{
         prompt: 'sqlite> ',
-        greetings: false /* note that the docs incorrectly call this 'greeting' */
+        greetings: false /* the docs incorrectly call this 'greeting' */
       });
+      /* Disable all special handling of the input:
+         https://sqlite.org/forum/forumpost/c6665017c0dbba1f
+         https://github.com/jcubic/jquery.terminal/issues/1044 */
+      const no_formatting = (str)=>window.jQuery.terminal.escape_formatting(str);
+      no_formatting.__meta__ = true;
+      window.jQuery.terminal.new_formatter(no_formatting);
       EAll('.unhide-if-terminal-available').forEach(e=>{
         e.classList.remove('hidden');
       });
@@ -890,5 +897,6 @@
     SF.dbExec(urlParams.get('sql') || null);
     delete SF.ForceResizeKludge.$disabled;
     SF.ForceResizeKludge();
+    globalThis.fiddle = SF;
   }/*onSFLoaded()*/;
 })();

ext/wasm/fiddle/index.c-pp.html

@@ -322,8 +322,9 @@
   <h1>Usage Summary</h1>
 
   <ul>
-    <li class='hidden unhide-if-terminal-available'>In "terminal
-      mode" it accepts input just like the CLI shell does.</li>
+    <li class='hidden unhide-if-terminal-available'>In
+      <a href="https://github.com/jcubic/jquery.terminal">"terminal
+      mode"</a> it accepts input just like the CLI shell does.</li>
     <li>In split-view mode:
       <ul>
         <li>Input can be executed with either the Run

ext/wasm/mkwasmbuilds.c

@@ -1021,11 +1021,15 @@ static void mk_fiddle(void){
       pf("\t@$(call b.call.wasm-strip,%s)\n", zBuildName);
       pf("\t@$(call b.strip-js-emcc-bindings,$(logtag.%s))\n",
          zBuildName);
+      pf("\t@$(call b.cp,%s,$(dir.dout)/sqlite3-opfs-async-proxy.js,"
+         "$(dir $@)"
+         ")\n", zBuildName);
       if( isDebug ){
         pf("\t@$(call b.cp,%s,"
            "$(dir.fiddle)/index.html "
            "$(dir.fiddle)/fiddle.js "
-           "$(dir.fiddle)/fiddle-worker.js,"
+           "$(dir.fiddle)/fiddle-worker.js "
+           "$(dir.fiddle)/sqlite3-opfs-async-proxy.js,"
            "$(dir $@)"
            ")\n",
            zBuildName);

ext/wasm/tester1.c-pp.js

@@ -380,16 +380,19 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
      function which must return a constructor args object for ctor. It
      is passed true if the db needs to be cleaned up/unlinked before
      opening it (OPFS) and false if not (how that is done is
-     VFS-dependent).  dbUnlink is a function which is expected to
-     unlink() the db file if the ctorOpfFunc does not do so when
-     passed true (kvvfs).
+     VFS-dependent).  dbUnlink is a _synchronous_ function which is
+     expected to unlink() the db file if the ctorOpfFunc does not do
+     so when passed true (namely for kvvfs).
 
-     This function initializes the db described by ctorOptFunc(...),
-     writes some secret info into it, and re-opens it twice to
-     confirmi that it can be read with an SEE key and cannot be read
-     without one.
+     This function initializes the db described by the result of
+     ctorOptFunc(bool), writes some secret info into it, and re-opens
+     it twice to confirm that it can be read with an SEE key and
+     cannot be read without one.
+
+     If unlinkDbAtEnd is truthy then dbUnlink() is (on success)
+     called before returning.
   */
-  T.seeBaseCheck = function(ctor, ctorOptFunc, dbUnlink){
+  T.seeBaseCheck = function(ctor, ctorOptFunc, dbUnlink, unlinkDbAtEnd=true){
     let initDb = true;
     const tryKey = function(keyKey, key, expectCount){
       let db;
@@ -450,7 +453,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
     tryKey('hexkey', hexFoo, 3);
     T.assert( !initDb );
     tryKey('hexkey', hexFoo, 6);
-    dbUnlink();
+    if( unlinkDbAtEnd ) dbUnlink();
   };
 //#/if enable-see
 
@@ -3596,7 +3599,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
       name: 'kvvfs SEE encryption in sessionStorage',
       predicate: ()=>(!!globalThis.sessionStorage
                       || "sessionStorage is not available"),
-      test: function(sqlite3){
+      test: async function(sqlite3){
         const JDb = sqlite3.oo1.JsStorageDb;
         T.seeBaseCheck(JDb,
                        (isInit)=>{
@@ -3923,16 +3926,39 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
     .t({
       name: '@vfsName@ with SEE encryption',
       predicate: (sqlite3)=>!!sqlite3.oo1.@oo1Ctor@,
-      test: function(sqlite3){
-        T.seeBaseCheck(
-          sqlite3.oo1.@oo1Ctor@,
-          function(isInit){
-            const opt = {filename: 'file:///sqlite3-see.edb'};
-            if( isInit ) opt.filename += '?delete-before-open=1';
-            return opt;
-          },
-          ()=>{}
-        );
+      test: async function(sqlite3){
+        const ctor = sqlite3.oo1.@oo1Ctor@;
+        const filename = 'sqlite3-see.edb';
+        const ctorOpt = {filename: 'file:///'+filename};
+        const opfs = sqlite3.opfs;
+        const initer = function(isInit){
+          const opt = {...ctorOpt};
+          if( isInit ) opt.filename += '?delete-before-open=1';
+          return opt;
+        };
+
+        T.seeBaseCheck(ctor, initer, ()=>{}, false);
+        /*
+          Ensure that ctor.importDb() correctly handles SEE-encrypted
+          dbs. For more details search below for forumpost/f84bef3552.
+        */
+        let exp = await opfs.getRootDir()
+            .then(d=>d.getFileHandle(filename))
+            .then(fh=>fh.getFile())
+            .then(f=>f.bytes());
+        await opfs.unlink(filename);
+        T.assert( exp.byteLength > 100 && 0===(exp.byteLength % 512) );
+        const got = await ctor.importDb(filename, exp);
+        T.assert(exp.byteLength === got);
+        exp = null;
+        const db = new ctor({...initer(false), key: 'foo'});
+        try{
+          T.assert( 4 === db.selectValue("select count(*) from t") )
+            .assert( 6 === db.selectValue("select sum(a) from t") );
+        }finally{
+          db.close();
+          await opfs.unlink(filename);
+        }
       }
     })
 //#/if enable-see
@@ -3940,7 +3966,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
 //#/query
   ////////////////////////////////////////////////////////////////////////
   T.g('OPFS SyncAccessHandle Pool VFS',
-      (sqlite3)=>(!!sqlite3.installOpfsSAHPoolVfs || "requires OPFS SAH Pool APIs"))
+      (sqlite3)=>((isWorker() && !!sqlite3.installOpfsSAHPoolVfs) || "requires OPFS SAH Pool APIs"))
     .t({
       name: 'SAH sanity checks',
       test: async function(sqlite3){
@@ -4136,12 +4162,32 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
         }
         let poolUtil;
         const P1 = await inst(poolConfig).then(u=>poolUtil = u).catch(catcher);
+        if( !poolUtil ) return;
         const dbFile = '/sqlite3-see.edb';
         T.seeBaseCheck(
           poolUtil.OpfsSAHPoolDb,
           (isInit)=>{return {filename: dbFile}},
-          ()=>poolUtil.unlink(dbFile)
+          ()=>poolUtil.unlink(dbFile),
+          false
         );
+        /* Ensure that importDb() does the right thing for an
+           SEE-encrypted DB: https://sqlite.org/see/forumpost/f84bef3552 */
+        let exp = poolUtil.exportFile(dbFile);
+        T.assert( exp.byteLength > 100 && 0===(exp.byteLength % 512) );
+        poolUtil.unlink(dbFile);
+        const got = poolUtil.importDb(dbFile, exp);
+        T.assert(exp.byteLength === got);
+        exp = null;
+        const db = new poolUtil.OpfsSAHPoolDb({
+          filename: dbFile,
+          key: 'foo'
+        });
+        try{
+          T.assert( 4 === db.selectValue("select count(*) from t") )
+            .assert( 6 === db.selectValue("select sum(a) from t") );
+        }finally{
+          db.close();
+        }
         poolUtil.removeVfs();
       }
     })/*opfs-sahpool with SEE*/

main.mk

@@ -982,6 +982,7 @@ FUZZCHECK_SRC = sqlite3.c \
    $(TOP)/ext/recover/dbdata.c \
    $(TOP)/ext/recover/sqlite3recover.c \
    $(TOP)/test/vt02.c \
+   $(TOP)/ext/misc/analyze.c \
    $(TOP)/ext/misc/base64.c \
    $(TOP)/ext/misc/base85.c \
    $(TOP)/ext/misc/completion.c \
@@ -1678,7 +1679,8 @@ tclsqlite3.c:	sqlite3.c tclsqlite-ex.c
 #
 # $(CFLAGS.tclextension) = CFLAGS for the tclextension* targets.
 #
-CFLAGS.tclextension = $(CFLAGS.intree_includes) $(CFLAGS.env) $(OPT_FEATURE_FLAGS) $(OPTS)
+CFLAGS.tclextension = $(CFLAGS.intree_includes) $(CFLAGS.env) \
+  $(OPT_FEATURE_FLAGS) $(OPTS) $(CFLAGS.icu)
 #
 # Build the SQLite TCL extension in a way that make it compatible
 # with whatever version of TCL is running as $TCLSH_CMD, possibly defined
@@ -1686,7 +1688,8 @@ CFLAGS.tclextension = $(CFLAGS.intree_includes) $(CFLAGS.env) $(OPT_FEATURE_FLAG
 #
 tclextension: tclsqlite3.c
 	$(TCLSH_CMD) $(TOP)/tool/buildtclext.tcl --build-only \
-		--tclConfig.sh $(TCL_CONFIG_SH) --cc "$(T.cc)" $(CFLAGS.tclextension)
+		--tclConfig.sh $(TCL_CONFIG_SH) --cc "$(T.cc)" \
+		--extlibs "$(LDFLAGS.icu)" $(CFLAGS.tclextension)
 
 #
 # Install the SQLite TCL extension in a way that is appropriate for $TCLSH_CMD
@@ -1694,7 +1697,8 @@ tclextension: tclsqlite3.c
 #
 tclextension-install: tclsqlite3.c
 	$(TCLSH_CMD) $(TOP)/tool/buildtclext.tcl --destdir "$(DESTDIR)" \
-		--tclConfig.sh $(TCL_CONFIG_SH) --cc "$(T.cc)" $(CFLAGS.tclextension)
+		--tclConfig.sh $(TCL_CONFIG_SH) --cc "$(T.cc)" \
+		--extlibs "$(LDFLAGS.icu)" $(CFLAGS.tclextension)
 
 #
 # Uninstall the SQLite TCL extension that is used by $TCLSH_CMD.
@@ -2341,6 +2345,7 @@ SHELL_DEP = \
     $(TOP)/ext/expert/sqlite3expert.h \
     $(TOP)/ext/intck/sqlite3intck.c \
     $(TOP)/ext/intck/sqlite3intck.h \
+    $(TOP)/ext/misc/analyze.c \
     $(TOP)/ext/misc/appendvfs.c \
     $(TOP)/ext/misc/base64.c \
     $(TOP)/ext/misc/base85.c \
@@ -2422,6 +2427,10 @@ sqlite3session.o:	$(TOP)/ext/session/sqlite3session.c $(DEPS_EXT_COMMON)
 stmt.o:	$(TOP)/ext/misc/stmt.c $(DEPS_EXT_COMMON)
 	$(T.cc.extension) -c $(TOP)/ext/misc/stmt.c
 
+$(AUXTEST): $(TOP)/test/c/$(AUXTEST).c
+	$(T.cc.sqlite) -o $@ $(TOP)/test/c/$(AUXTEST).c sqlite3.o $(LDFLAGS.libsqlite3)
+
+
 #
 # Windows section
 #

manifest

@@ -1,13 +1,13 @@
-C Add\sthe\s\B\sescape\sfor\sCLI\sprompts.\s\sChange\sthe\sdefault\sprompts\sto\nuse\s\f,\s\H,\sand\s\B.
-D 2026-04-10T20:06:34.810
+C Add\sthe\sSQLITE_CHANGESETAPPLY_NOUPDATELOOP\soption\sto\sthe\ssqlite3_changeset_apply_v2/3()\smethod.\sTo\sdisable\sthe\sextra\sprocessing\sto\scommit\schangesets\sthat\sswap\stwo\sor\smore\svalues\ssubject\sto\sa\sUNIQUE\sconstraint\sbetween\srows.
+D 2026-05-22T14:22:14.502
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md 6bc480fc673fb4acbc4094e77edb326267dd460162d7723c7f30bee2d3d9e97d
 F Makefile.in 5fda086f33b144da08119255da1d2557f983d0764a13707f05acf0159fd89ba5
 F Makefile.linux-generic bd3e3cacd369821a6241d4ea1967395c962dfe3057e38cb0a435cee0e8b789d0
-F Makefile.msc 06b757f8648f1d9dd9683dbd72350cf0cf20d6fe09168cac455569b81dd97ddc
-F README.md f49fbd826941842e348242f3ab62f240c985ceafdf8fbe576abf4eb75317468c
+F Makefile.msc 6f4294982758b5eeeac740c1a263186c3fcb9ba51d1b48261e321bcb37a41dbb
+F README.md f00091ffb5c6379b783afb57ca5f443a5742e119082f37c407f64a5e16c56346
 F VERSION 99cf3be5f13d091183e4314b7fc2e0c0e69accfbe64608b45a313338bbdd7b62
 F art/icon-243x273.gif 9750b734f82fdb3dc43127753d5e6fbf3b62c9f4e136c2fbf573b2f57ea87af5
 F art/icon-80x90.gif 65509ce3e5f86a9cd64fe7fca2d23954199f31fe44c1e09e208c80fb83d87031
@@ -44,10 +44,10 @@ F autosetup/cc-lib.tcl 493c5935b5dd3bf9bd4eca89b07c8b1b1a9356d61783035144e21795f
 F autosetup/cc-shared.tcl 163eda58c14cd662fd8a504bd2ad8a716ef4db7015dc1de0095d5de8dd601a4b
 F autosetup/cc.tcl c0fcc50ca91deff8741e449ddad05bcd08268bc31177e613a6343bbd1fd3e45f
 F autosetup/find_tclconfig.tcl e64886ffe3b982d4df42cd28ed91fe0b5940c2c5785e126c1821baf61bc86a7e
-F autosetup/jimsh0.c 916bbdf8023fbda9937afae57d81a853d8c2ea00f2320aa27becbc33574f963d
+F autosetup/jimsh0.c 740dc8cbfaedaff1f27b54b32e0015b22fa6c1a439492b9795968d61e56bab75
 F autosetup/pkg-config.tcl 4e635bf39022ff65e0d5434339dd41503ea48fc53822c9c5bde88b02d3d952ba
-F autosetup/proj.tcl ce301197f364f7ce2acabbbd84b43d19e917ec73653157ca134a06f32d322712
-F autosetup/sqlite-config.tcl 8fecce2838b7e7d990d161d08998034f3e3b0b2ddf4d7a99dbfafba9c902e302
+F autosetup/proj.tcl 67683f214977a416baafc4c1020f9940ff047a7306b2292c5872d6287460b7d5
+F autosetup/sqlite-config.tcl 2205b8bcc193a5d46584ebc1cf44c7a93a977d155e20dc38b18dcce720e58074
 F autosetup/system.tcl 51d4be76cd9a9074704b584e5c9cbba616202c8468cf9ba8a4f8294a7ab1dba9
 F autosetup/teaish/README.txt b40071e6f8506500a2f7f71d5fc69e0bf87b9d7678dd9da1e5b4d0acbf40b1ca
 F autosetup/teaish/core.tcl e014dd95900c7f9a34e8e0f460f47e94841059827bce8b4c49668b0c7ae3f1a0
@@ -63,7 +63,7 @@ F doc/jsonb.md acd77fc3a709f51242655ad7803510c886aa8304202fa9cf2abc5f5c4e9d7ae5
 F doc/lemon.html 2085fda0a90a94fe92159a79dccc5c30d5a2313524887a31659cd66162f17233
 F doc/pager-invariants.txt 83aa3a4724b2d7970cc3f3461f0295c46d4fc19a835a5781cbb35cb52feb0577
 F doc/tcl-extension-testing.md b88861804fc1eaf83249f8e206334189b61e150c360e1b80d0dcf91af82354f5
-F doc/testrunner.md daffa0ebbbe397a73537ae1b19b3124d489ce5f89dfe570781d1f1ef1809597c
+F doc/testrunner.md 3589f7914d36adaff6d108566e09b2c6166887bea00580e5343f8b43615ffe12
 F doc/trusted-schema.md 33625008620e879c7bcfbbfa079587612c434fa094d338b08242288d358c3e8a
 F doc/vdbesort-memory.md 4da2639c14cd24a31e0af694b1a8dd37eaf277aff3867e9a8cc14046bc49df56
 F doc/vfs-shm.txt 1a55f3f0e7b6745931b117ba5c9df3640d7a0536f532ef0052563100f4416f86
@@ -82,13 +82,13 @@ F ext/fts3/README.txt 8c18f41574404623b76917b9da66fcb0ab38328d
 F ext/fts3/fts3.c 6cc7bbc307f27e7b6ee2e1d5ff63ffff4df3b42529dfe00eb34ddded417961b3
 F ext/fts3/fts3.h 3a10a0af180d502cecc50df77b1b22df142817fe
 F ext/fts3/fts3Int.h 277f32f304e82f4397fc2a74793c0a95318b7abb9670b519e4805a00946cbd9b
-F ext/fts3/fts3_aux.c 37ba1b10bbd163ddc6b05dbc3a306a0d5d68aee3d30f33b4dc5794955cc50887
-F ext/fts3/fts3_expr.c 5c13796638d8192c388777166075cdc8bc4b6712024cd5b72c31acdbefce5984
+F ext/fts3/fts3_aux.c c105f6502df588f49a383eb22aed953844fb0e31265361a0cc8dd73037b37e39
+F ext/fts3/fts3_expr.c 907dd64deb881c0586d5ecbabc96cfebdbe2ff9e7a052d379fd3b606edfa21ea
 F ext/fts3/fts3_hash.c d9dba473741445789330c7513d4f65737c92df23c3212784312931641814672a
 F ext/fts3/fts3_hash.h 39cf6874dc239d6b4e30479b1975fe5b22a3caaf
 F ext/fts3/fts3_icu.c 305ce7fb6036484085b5556a9c8e62acdc7763f0f4cdf5fd538212a9f3720116
 F ext/fts3/fts3_porter.c 024417020c57dd1ab39816f5fe6cf45222a857b78a1f6412f040ada1ceabd4ff
-F ext/fts3/fts3_snippet.c abe3b2998e7cb6d1ab6019f87f021758a0df3ee4010fe144a174a524cff96fe6
+F ext/fts3/fts3_snippet.c 65e178107b59ad4724a11339a645f2e3789f3cf59b2f4e29c90efd864e53c5b4
 F ext/fts3/fts3_term.c 6a96027ad364001432545fe43322b6af04ed28bb5619ec51af1f59d0710d6d69
 F ext/fts3/fts3_test.c cc329471e573f95a6ea9fbca87e89dcfa1d355591c80172ffcd759ac521d25d8
 F ext/fts3/fts3_tokenize_vtab.c 66eba6c2baa04b2b15e80d68341b8fd0b4d3831f6b2edb33916a2906ff2d4389
@@ -113,13 +113,13 @@ F ext/fts5/fts5_buffer.c dcc3f0352339fe79c9d8abbc1c2009bc3469206467880bf43558447
 F ext/fts5/fts5_config.c bfba970fe1e4eed18ee57c8d51458e226db9a960ddf775c5e50e3d76603a667e
 F ext/fts5/fts5_expr.c 71d48e8cf0358deace4949276647d317ff7665db6db09f40b81e2e7fe6664c7c
 F ext/fts5/fts5_hash.c d5871df92ce3fa210a650cf419ee916b87c29977e86084d06612edf772bff6f5
-F ext/fts5/fts5_index.c f8cfa37bb7397e5ede20242e4c9cb030bc8b4584ce3f23a5e2495038c0ae64bd
+F ext/fts5/fts5_index.c 4ac3d9e9f83280d9b7bf29c0948c3a1ed17533ecaab3fbf0ad95218c3409b42e
 F ext/fts5/fts5_main.c b0fed47b3b4420ba6810373480a75bc28a9c0b7d16478d19a396436fb3ff17d7
 F ext/fts5/fts5_storage.c 19bc7c4cbe1e6a2dd9849ef7d84b5ca1fcbf194cefc3e386b901e00e08bf05c2
 F ext/fts5/fts5_tcl.c 2be6cc14f9448f720fd4418339cd202961a0801ea9424cb3d9de946f8f5a051c
 F ext/fts5/fts5_test_mi.c 4308d5658cb1f5eee5998dcbaac7d5bdf7a2ef43c8192ca6e0c843f856ccee26
 F ext/fts5/fts5_test_tok.c 6021033bd4f4feffe8579efb6e1f58156ed462256bf99a2acdbd629246529204
-F ext/fts5/fts5_tokenize.c cfc16dde905552fe238c0403670852e75c0330ba508a9fb4836c1f596618561d
+F ext/fts5/fts5_tokenize.c 0469b30e7bf25255fbb7c101e2b549a521fb501342e7269cf73cbb6b2dbd8da2
 F ext/fts5/fts5_unicode2.c 536a6dae41d16edadd6a6b58c56e2ebbb133f0dfe757562a2edbcdc9b8362e50
 F ext/fts5/fts5_varint.c e64d2113f6e1bfee0032972cffc1207b77af63319746951bf1d09885d1dadf80
 F ext/fts5/fts5_vocab.c bebee4aabcd056a44b3731166433cfdecf17ece750c08cb58733216222bd39e2
@@ -162,13 +162,14 @@ F ext/fts5/test/fts5contentless4.test ec34dc69ef474ca9997dae6d91e072906e0e9a5a4b
 F ext/fts5/test/fts5contentless5.test 38cd0392c730dc7090c550321ce3c24ba4c392bc97308b51a4180e9959dca7b5
 F ext/fts5/test/fts5corrupt.test 237fce1c3261bb3a5bec333b0f0dbf5b105ec32627ef14cccbda3cfe13833193
 F ext/fts5/test/fts5corrupt2.test 4a03a158c2cb617c9f76d26b35c1ef2534124bc0bbddcea38dfd5b170ebea27b
-F ext/fts5/test/fts5corrupt3.test e489b51b6c4ded2a808e0f78bdbe126f6d369de41a59ac2717878e37fc3db0e8
+F ext/fts5/test/fts5corrupt3.test 121a8a7622dfe1be1bc55cbe70eddd6a3416f76a837dc8c06a11a32e781595a4
 F ext/fts5/test/fts5corrupt4.test dc08d19f5b8943e95a7778a7d8da592042504faf18dd93f68f7d7a0d7d7dd733
-F ext/fts5/test/fts5corrupt5.test 73985d4fe6d8f0d5d5c7bcf79ae7c6522c376cd6ad710a0ff2f26e0c2e222abe
+F ext/fts5/test/fts5corrupt5.test 329fb0e21b1dfb9752e1769ca078f27a8e99cfcc017055c8a6d724011b73c9c6
 F ext/fts5/test/fts5corrupt6.test 2d72db743db7b5d9c9a6d0cfef24d799ed1aa5e8192b66c40e871a37ed9eed06
 F ext/fts5/test/fts5corrupt7.test 814aab492d7a09abb5bfdd81cc66fc206d7f3868f9a3bae91876e02efc466fb3
 F ext/fts5/test/fts5corrupt8.test 0b10750caf8aa23fa1c379ca4caf6130d41454505e4d5315590f4061eedcbe44
 F ext/fts5/test/fts5corrupt9.test 4253b9b59f33effac8b67da72ec34309c738aca2d5e8e2656bfbbd6a489a1dfe
+F ext/fts5/test/fts5corruptA.test 7b31551444569420903d34ae50a55a1227d16969264f0b50de2dc812bc0b3414
 F ext/fts5/test/fts5corruptbig.test 9f95b40fa36e292feceab02b2ef06e21878bfa1ac7afefa138aae05518b51774
 F ext/fts5/test/fts5delete.test 2a5008f8b1174ef41d1974e606928c20e4f9da77d9f8347aed818994d89cced4
 F ext/fts5/test/fts5detail.test 54015e9c43ec4ba542cfb93268abdf280e0300f350efd08ee411284b03595cc4
@@ -227,7 +228,7 @@ F ext/fts5/test/fts5origintext6.test 09eb1347cb0dceaebbebf3d3e6bd5d24c7c1006efdd
 F ext/fts5/test/fts5phrase.test bb2554bb61d15f859678c96dc89a7de415cd5fc3b7b54c29b82a0d0ad138091c
 F ext/fts5/test/fts5plan.test f8b0d752a818059a934cdc96c0f77de058a67a0a57bb3a8181d28307ab5b1626
 F ext/fts5/test/fts5porter.test 15b514fac8690b58e99c330efe5bf5615bc43f2fae4a3cca3f923dbaff55a0c0
-F ext/fts5/test/fts5porter2.test 94f0e4351e2c99b4e74f1fae05a4ddf1cb5b926620a8c14554160d075ddc7a59
+F ext/fts5/test/fts5porter2.test 1dab0fe41342ebed32ca36a145de3e50be9093cb71e9f5250f6ebc589207982a
 F ext/fts5/test/fts5prefix.test c0b7842f1a2d830c0b146cd438a95ea4c5a25635719ed0d973ffe41907338b83
 F ext/fts5/test/fts5prefix2.test a5bb43b8a2687efafa7ac4e5ccff6812015cf8cf18e3086bb0eb3126f30fbbf6
 F ext/fts5/test/fts5query.test 0320a7a4b58a6e3e50ec8910b301649da90ace675001f9e0bf6392750ad4591d
@@ -253,7 +254,7 @@ F ext/fts5/test/fts5synonym2.test 58f357b997cf2fedeeb9d0de4db9f880fa96fa2fe27a74
 F ext/fts5/test/fts5tok1.test 1f7817499f5971450d8c4a652114b3d833393c8134e32422d0af27884ffe9cef
 F ext/fts5/test/fts5tok2.test dcacb32d4a2a3f0dd3215d4a3987f78ae4be21a2
 F ext/fts5/test/fts5tokendata.test 7cad79af82e8e81b7a36b450087233d2fca051bb0d584421afc375d6dd26d6f6
-F ext/fts5/test/fts5tokenizer.test 7937cec672b148223fff8746d21d3e7ed0965fd7caf35ccdc888a005bb452f98
+F ext/fts5/test/fts5tokenizer.test 738e9c3e1b338028e202d0fcd33aa39f1bd3f8444d14f9a408e8a617b1361d3f
 F ext/fts5/test/fts5tokenizer2.test ddb8b10fbe4b84b2a75812671f127774c1d2e3e2bf82d2e0e4f0bb1cd8a2b2d6
 F ext/fts5/test/fts5tokenizer3.test eea778f7bb7024c3e904e28915f9d53286141671b138722148be22a9c758bdc3
 F ext/fts5/test/fts5trigram.test a55fde7065ae69a0f82c5a7a5bf5286a97de11ae4bff6537fd3e27ca9a01416f
@@ -278,7 +279,7 @@ F ext/fts5/tool/loadfts5.tcl 95b03429ee6b138645703c6ca192c3ac96eaf093
 F ext/fts5/tool/mkfts5c.tcl 135b9e160f8e10211c10c5873d5e8c3eaebd3da9ec56a12ae4db157d4738ffe4
 F ext/fts5/tool/showfts5.tcl d54da0e067306663e2d5d523965ca487698e722c
 F ext/icu/README.txt 1f8d76e10d2385fc77914a14ccd99acfbaf68111dfcf26a360ad9063787f57fb
-F ext/icu/icu.c 9837f4611915baad1edbe38222f3ee7d1b5e118ab16fec9ba603720f72c78b2a
+F ext/icu/icu.c 535d0d61f109e760a56e1afc450414ebfb0e2d594e2233b30315b815e3433ac2
 F ext/icu/sqliteicu.h fa373836ed5a1ee7478bdf8a1650689294e41d0c89c1daab26e9ae78a32075a8
 F ext/intck/intck1.test 53d885075abeb45aeb1eeffeaa8560b329060835ade4af5c44cf5fcb581c1e63
 F ext/intck/intck2.test a29343a8e65c5c3400e10747f394924f3df95a5b2de94f46e9b5c9b97f5e7339
@@ -357,7 +358,8 @@ F ext/jni/src/tests/000-000-sanity.test c3427a0e0ac84d7cbe4c95fdc1cd4b61f9ddcf43
 F ext/jni/src/tests/000-001-ignored.test e17e874c6ab3c437f1293d88093cf06286083b65bf162317f91bbfd92f961b70
 F ext/jni/src/tests/900-001-fts.test bf0ce17a8d082773450e91f2388f5bbb2dfa316d0b676c313c637a91198090f0
 F ext/misc/README.md 6243cdc4d7eb791c41ef0716f3980b8b5f6aa8c61ff76a3958cbf0031c6ebfa7
-F ext/misc/amatch.c 8d237cc014b3736922c26a76a451050d244aa4980c47c531f368f817b1e77b49
+F ext/misc/amatch.c 972a250631d481f38736b46740bf7f5c9646a0f2bb53800543299a746ff1bac6
+F ext/misc/analyze.c 77e0f45a44c13d66f30922db553072305521c0fb3a448b920e641fccd2498527
 F ext/misc/anycollseq.c 5ffdfde9829eeac52219136ad6aa7cd9a4edb3b15f4f2532de52f4a22525eddb
 F ext/misc/appendvfs.c 9642c7a194a2a25dca7ad3e36af24a0a46d7702168c4ad7e59c9f9b0e16a3824
 F ext/misc/base64.c 1445761667c16356e827fc6418294c869468be934429aaa8315035e76dd58acf
@@ -371,11 +373,11 @@ F ext/misc/completion.c 3f5db28e88c3313103b2dd86d910a2944fd500c46754e473493968ce
 F ext/misc/compress.c 8191118b9b73e7796c961790db62d35d9b0fb724b045e005a5713dc9e0795565
 F ext/misc/csv.c 5e9d4dd749e762c144104c0f01db5bf4458735b19081ebe481a64e589a66687a
 F ext/misc/dbdump.c 678f1b9ae2317b4473f65d03132a2482c3f4b08920799ed80feedd2941a06680
-F ext/misc/decimal.c 23698283d9365ce66d54b5bb97c01e69b4aa7ac804f226f9117a0d42efd15a65
+F ext/misc/decimal.c 432e5b03a0e2a68a1846a9852a565a1b546ca9b295deda834e4653f0f5577daa
 F ext/misc/eval.c 04bc9aada78c888394204b4ed996ab834b99726fb59603b0ee3ed6e049755dc1
 F ext/misc/explain.c 9670c8ff7b255eea7845abc5123a4958e74016c16990b10497e56380f91704b9
-F ext/misc/fileio.c e72033f987894ed821bf324a426ed462743399c274f1290dcb646349b6d7548f
-F ext/misc/fossildelta.c 40add35db7f355d29ae856fe09043e66802fceff6f2551baccb28d794cadbc77
+F ext/misc/fileio.c 936c0a7b3382a047d833ad33f62ba59a3847b79ea745bf529797cd344966fbb0
+F ext/misc/fossildelta.c 6aa3f15279cd2d796583e3ff654be7d2df745fdbea7987c1640e78ce1fac899e
 F ext/misc/fuzzer.c decaca5a3479dfba69576cd41d4e17161eaf154a5438e12d316bbc5853571802
 F ext/misc/ieee754.c 2901d08a586d00a1d3c0fd89e03c57ee9e2b5f013b0daab9e49c7a48a9d5946b
 F ext/misc/memstat.c 03ab52d2d841eb3f55118105c1964d5225f152b23bd708844c648b48d14ccbcf
@@ -386,18 +388,18 @@ F ext/misc/noop.c f1a21cc9b7a4e667e5c8458d80ba680b8bd4315a003f256006046879f679c5
 F ext/misc/normalize.c fbb144a861809686ff2b5b6eee8bb2e1207f9bf13ce7376e5273c700a1eafbd5
 F ext/misc/pcachetrace.c f4227ce03fb16aa8d6f321b72dd051097419d7a028a9853af048bee7645cb405
 F ext/misc/percentile.c 72e05a21db20a2fa85264b99515941f00ae698824c9db82d7edfbb16cea8ec80
-F ext/misc/prefixes.c aa15fd268e7d1336d1a1d4bc79265860d1d2ad68bba4cbcab61f83e4989dc68c
+F ext/misc/prefixes.c efc261429fd8ab43cedc0d38b94d86d87437af5550651bceb618bd7e84e25125
 F ext/misc/qpvtab.c 470a5fffba005c8e1994209e59c1848122351e19522de71beb68d666c4fa39a5
 F ext/misc/randomjson.c ef835fc64289e76ac4873b85fe12f9463a036168d7683cf2b773e36e6262c4ed
-F ext/misc/regexp.c 9dada9e9aa91f0cc23e35429e5d1111f110cc201b4c8dcc49aa6d2fc4b2a865d
+F ext/misc/regexp.c 378e6e84516952a4b9f3f4df88927f20e6538e2609f55b773ed78899dab8206e
 F ext/misc/remember.c add730f0f7e7436cd15ea3fd6a90fd83c3f706ab44169f7f048438b7d6baa69c
 F ext/misc/rot13.c 51ac5f51e9d5fd811db58a9c23c628ad5f333c173f1fc53c8491a3603d38556c
 F ext/misc/scrub.c df54e202887e480bf9cd73168c9ac829e3b0211381b68b9809e0cb5bc1bdc2cf
-F ext/misc/series.c 9454c7ef27d3729432496f31caabc892aeee1c21377d403f681126d93c09d6e9
-F ext/misc/sha1.c 8bf60344c11a525384c2efd1ae77f160b06be336db679effaadf292d4b41451c
+F ext/misc/series.c 496f43bac9bad2ee2cea63fb5212036f30ad3003b4cd317d5c2d6f3ad7c7d264
+F ext/misc/sha1.c 9a11826db885e8afd997c0a1b28bb799a43e462ef770ac33f19e744887c9c6fa
 F ext/misc/shathree.c fd22d70620f86a0467acfdd3acd8435d5cb54eb1e2d9ff36ae44e389826993df
 F ext/misc/showauth.c 732578f0fe4ce42d577e1c86dc89dd14a006ab52
-F ext/misc/spellfix.c 693c8fd3293087fa821322967a97e59dfa24051e5d2ca7fa85790a4034db6fa4
+F ext/misc/spellfix.c 36b0f4893ff583b6dcc727beca44cc262e7855713aea57a0154766936352cf81
 F ext/misc/sqlar.c 97c100b010159c08a7a9acd8eb1ea510a5522e64741aaafcd7b6c629de682edc
 F ext/misc/sqlite3_stdio.c b43a0f530c6f0fb3d41d9af8c0b40f3f71198a1db55ab8ffffbef5c8cc329d22
 F ext/misc/sqlite3_stdio.h 27a4ecea47e61bc9574ccdf2806f468afe23af2f95028c9b689bfa08ab1ce99f
@@ -421,8 +423,8 @@ F ext/misc/zipfile.c 5a583b5e72b4d777dc9f845529e6bd185d58024b633aafc93588679c787
 F ext/misc/zorder.c bddff2e1b9661a90c95c2a9a9c7ecd8908afab5763256294dd12d609d4664eee
 F ext/qrf/README.md 9e644615d7d7b77ef7e9db798765679e50c5ed12eda48bce21c9ef9eb4715e9d
 F ext/qrf/dev-notes.md e68a6d91ce4c7eb296ef2daadc2bb79c95c317ad15b9fafe40850c67b29c2430
-F ext/qrf/qrf.c 64203184d9fc6ee75439fb6da70fd51dc7aaf3243600e52aa87d18ea1e4d6e73
-F ext/qrf/qrf.h fbb223ff5789b324b3e9c22e787e4c1f53e217cff7cc5a243164d4b2e8410f4b
+F ext/qrf/qrf.c 02fce2add53dda452ca7b74a3e8f5de3c2b75919fd1a29f7393c1e4cf1272370
+F ext/qrf/qrf.h 7a832022bc3f40dc09fff1cb6f18025395a19313de090265a4a1d22bb9b400be
 F ext/rbu/rbu.c 801450b24eaf14440d8fd20385aacc751d5c9d6123398df41b1b5aa804bf4ce8
 F ext/rbu/rbu1.test 25870dd7db7eb5597e2b4d6e29e7a7e095abf332660f67d89959552ce8f8f255
 F ext/rbu/rbu10.test 7c22caa32c2ff26983ca8320779a31495a6555737684af7aba3daaf762ef3363
@@ -463,11 +465,11 @@ F ext/rbu/rburesume.test 1403752d152b55efb7fc25749c0fccc790061371ec9ffe428cc04f8
 F ext/rbu/rbusave.test 588b618dad9d65c4b13d03a79931de82213503fedc26bdf5789c996ecf427fba
 F ext/rbu/rbusplit.test a6dedd23cf37bcf2e8646d9d7139846e96d60d92f9bc6d6ba6ca8c24c0bd1f72
 F ext/rbu/rbutemplimit.test 4980df2d4b74f4dd982add8f78809106154ef5a3c4bdce747422ab0b0481e029
-F ext/rbu/rbuvacuum.test 542561741ff2b262e3694bc6012b44694ee62c545845319a06f323783b15311e
+F ext/rbu/rbuvacuum.test e3585cfda220038e8186c583e9bd2aaa9eccd0a5c2e40ed861de3c987c93f68c
 F ext/rbu/rbuvacuum2.test 1a9bd41f127be2826de2a65204df9118525a8af8d16e61e6bc63ba3ac0010a23
 F ext/rbu/rbuvacuum3.test 3ce42695fdf21aaa3499e857d7d4253bc499ad759bcd6c9362042c13cd37d8de
 F ext/rbu/rbuvacuum4.test ffccd22f67e2d0b380d2889685742159dfe0d19a3880ca3d2d1d69eefaebb205
-F ext/rbu/sqlite3rbu.c e99400d29d029936075e27495b269a2dcdceae3cf8c86b1d0869b4af487be3ab
+F ext/rbu/sqlite3rbu.c 28246b647831409e84dfb8286fbeda55f1de89e934571509a23a67ada572d0c0
 F ext/rbu/sqlite3rbu.h e3a5bf21e09ca93ce4e8740e00d6a853e90a697968ec0ea98f40826938bdb68e
 F ext/rbu/test_rbu.c 8b6e64e486c28c41ef29f6f4ea6be7b3091958987812784904f5e903f6b56418
 F ext/recover/dbdata.c 10d3c56968a9af6853722a47280805ad1564714d79ea45ac6f7da14bb57fd137
@@ -486,12 +488,12 @@ F ext/recover/recoverpgsz.test 88766fcb810e52ee05335c456d4e5fb06d02b73d3ccb48c52
 F ext/recover/recoverrowid.test f948bf4024a5f41b0e21b8af80c60564c5b5d78c05a8d64fc00787715ff9f45f
 F ext/recover/recoverslowidx.test c90d59c46bb8924a973ac6fbc38f3163cee38cc240256addcab1cf1a322c37dc
 F ext/recover/recoversql.test e66d01f95302a223bcd3fd42b5ee58dc2b53d70afa90b0d00e41e4b8eab20486
-F ext/recover/sqlite3recover.c 56c216332ea91233d6d820d429f3384adbec9ecedda67aa98186b691d427cc57
+F ext/recover/sqlite3recover.c dfbfca5a8e4909333e5aa3749bcffb5dd7e396de9541c338f8cc843b2e20217e
 F ext/recover/sqlite3recover.h 011c799f02deb70ab685916f6f538e6bb32c4e0025e79bfd0e24ff9c74820959
 F ext/recover/test_recover.c 3d0fb1df7823f5bc22a0b93955034d16a2dfa2eb1e443e9a0123a77f120599a3
 F ext/rtree/README 734aa36238bcd2dee91db5dba107d5fcbdb02396612811377a8ad50f1272b1c1
 F ext/rtree/geopoly.c bd1971479184d559499ff3087c37f2823977d7b0ec80916141ae66f70345c88d
-F ext/rtree/rtree.c 44abdd5df278ca1901daf29c82cce6785f0ee82ce59e28160ee988c17a9a185b
+F ext/rtree/rtree.c acc098e82686fa278c20973d601b4c2489389f5d580d42efe0f799d2cf8cdf38
 F ext/rtree/rtree.h 4a690463901cb5e6127cf05eb8e642f127012fd5003830dbc974eca5802d9412
 F ext/rtree/rtree1.test e0608db762b2aadca0ecb6f97396cf66244490adc3ba88f2a292b27be3e1da3e
 F ext/rtree/rtree2.test 9d9deddbb16fd0c30c36e6b4fdc3ee3132d765567f0f9432ee71e1303d32603d
@@ -537,14 +539,14 @@ F ext/session/session4.test ad0ddaaddb9a99dac433d83fc6674aae2af072b8f57e63a6b3f2
 F ext/session/session5.test 716bc6fafd625ce60dfa62ae128971628c1a1169
 F ext/session/session6.test 35279f2ec45448cd2e24a61688219dc6cf7871757716063acf4a8b5455e1e926
 F ext/session/session8.test 326f3273abf9d5d2d7d559eee8f5994c4ea74a5d935562454605e6607ee29904
-F ext/session/session9.test 0c4a8fbe7a5031f50855f020f3408e1f07fd7859f1daa1629eadcec3422072d6
+F ext/session/session9.test ce2b898aa4caf0e492b57c29cb707224e0a33479e4f019785a81828273143ba5
 F ext/session/sessionA.test 1feeab0b8e03527f08f2f1defb442da25480138f
 F ext/session/sessionB.test c4fb7f8a688787111606e123a555f18ee04f65bb9f2a4bb2aa71d55ce4e6d02c
-F ext/session/sessionC.test 2bd42225efdf5f5b1a20f75b672665bcd4f67e2a6d7ddf7420fe7bf523ba41f8
+F ext/session/sessionC.test 7c9b5e90194b3b7ad8bcbc6fcbac77d2c572ec3566a30fce1e82f4d64fb9aa3f
 F ext/session/sessionD.test 470ff917dc849e2eb78142ade63aaabd729d773833cff0ff01bca0eda68a21ce
 F ext/session/sessionE.test b2010949c9d7415306f64e3c2072ddabc4b8250c98478d3c0c4d064bce83111d
 F ext/session/sessionF.test d37ed800881e742c208df443537bf29aa49fd56eac520d0f0c6df3e6320f3401
-F ext/session/sessionG.test 3efe388282d641b65485b5462e67851002cd91a282dc95b685d085eb8efdad0a
+F ext/session/sessionG.test 64c2b69531aebdb36d5977a5f832d77e4c8bda0c746a6c630adf23660bb1c7c2
 F ext/session/sessionH.test 71bbff6b1abb2c4ac62b84dee53273c37e0b21e5fde3aed80929403e091ef859
 F ext/session/sessionI.test 11e7b6729fc942982a5104a40132f70a2e964d64d60dc5809b8206465af74822
 F ext/session/session_common.tcl a31f537a929a695a852d241c9434f2847cadf329856401921139fbb03a5a7697
@@ -555,15 +557,16 @@ F ext/session/sessionat.test 00c8badb35e43a2f12a716d2734a44d614ff62361979b6b8541
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-F src/memdb.c a3feb427cdd4036ea2db0ba56d152f14c8212ca760ccb05fb7aa49ff6b897df3
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 F src/memjournal.c c283c6c95d940eb9dc70f1863eef3ee40382dbd35e5a1108026e7817c206e8a0
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 F src/mutex.h a7b2293c48db5f27007c3bdb21d438873637d12658f5a0bf8ad025bb96803c4a
 F src/mutex_noop.c 9d4309c075ba9cc7249e19412d3d62f7f94839c4
-F src/mutex_unix.c f7ee5a2061a4c11815a2bf4fc0e2bfa6fb8d9dc89390eb613ca0cec32fc9a3d1
-F src/mutex_w32.c e1d317d29cb623667d43de94714264d1e1871cc4bb39fa67dd17048e8138c739
+F src/mutex_unix.c caec9862aeebad01f6c8997cf709a239abeb0715fcce1895720b87fe7e2ef42f
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 F src/notify.c 57c2d1a2805d6dee32acd5d250d928ab94e02d76369ae057dee7d445fd64e878
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 F src/os.h 1ff5ae51d339d0e30d8a9d814f4b8f8e448169304d83a7ed9db66a65732f3e63
@@ -720,32 +723,32 @@ F src/os_common.h 6c0eb8dd40ef3e12fe585a13e709710267a258e2c8dd1c40b1948a1d14582e
 F src/os_kv.c e7d96727db5b67e39d590a68cc61c86daf4c093c36c011a09ebfb521182ec28d
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 F src/os_unix.c a07dce662f6c4e18098f6faa9f7ec7cf311f56ee9151bed2aad4dcd55852c9e2
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-F src/pager.c fe34fd22ec251436985d7b6ebdd05bf238a17901c2cb23d3d28974dd2361a912
+F src/os_win.c beae6892a5301541b932e8ada4c34dc871d96d4d98a28051382f32138501b1b9
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 F src/pager.h 6137149346e6c8a3ddc1eeb40aee46381e9bc8b0fcc6dda8a1efde993c2275b8
-F src/parse.y 3b784d6083380a950e3b1b32ce5ddd303e8c7c209d8ab788df2c62aaf9ee8eb3
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-F src/printf.c d442fda86ad11da7923dbb354d3761229b5b51dbe06c5c208fa75e3411c79434
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 F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
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 F src/rowset.c 8432130e6c344b3401a8874c3cb49fefe6873fec593294de077afea2dce5ec97
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-F src/sqlite.h.in a5605faa9479bbaac16c4ab43eb09ff50632004a8e05084d3fde56063ef73766
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+F src/shell.c.in 9dcc77636cdc48d67ea0cd7f4d54d791202e435e05598ec0a147cd61269e1c4d
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 F src/sqlite3.rc 015537e6ac1eec6c7050e17b616c2ffe6f70fca241835a84a4f0d5937383c479
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-F src/sqliteInt.h bc1cbc0c23dba35b324ae85a7dbb5fb182321bbd30857fb21f3d0cba049001a5
+F src/sqlite3ext.h 9788c301f95370fa30e808861f1d2e6f022a816ddbe2a4f67486784c1b31db2e
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 F src/sqliteLimit.h c70656b67ab5b96741a8f1c812bdd80c81f2b1c1e443d0cc3ea8c33bb1f1a092
 F src/status.c 7565d63a79aa2f326339a24a0461a60096d0bd2bce711fefb50b5c89335f3592
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
 F src/tclsqlite.c 7401c73c917a4d1b380c896a324c8d8eb533a999559d9e339d479596553bebfd
 F src/tclsqlite.h 614b3780a62522bc9f8f2b9fb22689e8009958e7aa77e572d0f3149050af348a
-F src/test1.c 3e3b013f59ffcb57dce00c90d55907072d71d4e970cb0a590cb261efe11bae9c
+F src/test1.c fe1316579a1778eb96d0bd12807f9dddc5e3984f5950127e2e1718c050cb6304
 F src/test2.c 2b9ab96bba63a1c369d5769390475259ad210f144a877805f2e32e563f9e93c1
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 F src/test4.c 0ac87fc13cdb334ab3a71823f99b6c32a6bebe5d603cd6a71d84c823d43a25a0
@@ -799,13 +802,13 @@ F src/trigger.c 4bf3bfb3851d165e4404a9f9e69357345f3f7103378c07e07139fdd8aeb7bd20
 F src/update.c 3e5e7ff66fa19ebe4d1b113d480639a24cc1175adbefabbd1a948a07f28e37cf
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-F src/util.c 377af5da226519a0f374dc3c6d408c9d303a92943e3ae5986432c7d52e6679a2
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 F src/vacuum.c d3d35d8ae893d419ade5fa196d761a83bddcbb62137a1a157ae751ef38b26e82
-F src/vdbe.c 6c57525d7db0232d52687d30da1093db0c152f14206c2ef1adf0c19a09d863e3
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 F src/vdbe.h 70e862ac8a11b590f8c1eaac17a0078429d42bc4ea3f757a9af0f451dd966a71
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 F src/vdbeapi.c 6cdcbe5c7afa754c998e73d2d5d2805556268362914b952811bdfb9c78a37cf1
-F src/vdbeaux.c 5387185849ef00062a5e84af731704e4bf5ec156d82cf5e509a442e9c03e089b
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 F src/vdbeblob.c b3f0640db9642fbdc88bd6ebcc83d6009514cafc98f062f675f2c8d505d82692
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 F src/vdbesort.c b69220f4ea9ffea5fdef34d968c60305444eea909252a81933b54c296d9cca70
@@ -816,10 +819,10 @@ F src/vxworks.h 9d18819c5235b49c2340a8a4d48195ec5d5afb637b152406de95a9436beeaeab
 F src/wal.c 7340d4f9bb827bd349127cac6b2cf0cb7f76b9fda645f7b9b0bf7a6e0b1e2e7c
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-F src/where.c bffca5e4ef20d0bfbdc24f1dc13fd3f955284225a8ad25a4454635f6be39aad0
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 F src/whereInt.h 8d94cb116c9e06205c3d5ac87af065fc044f8cf08bfdccd94b6ea1c1308e65da
-F src/wherecode.c 676cb6cb02878643e817d9917a2d3522b83a3736b2cedd3dc8a01d7bb92af6c2
-F src/whereexpr.c e9f7185fba366d9365aa7a97329609e4cf00b3dd0400d069fbaa5187350c17c6
+F src/wherecode.c 4d573077652f79780d6b50840ab8cbb72053dbb4eb230780dd2a146ab034475d
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 F src/window.c c0a38cd32473e8e8e7bc435039f914a36ca42465506dc491c65870c01ddac9fb
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/affinity2.test 4d7a34d328e58ca2a2d78fd76c27614a41ca7ddf4312ded9c68c04f430b3b47d
@@ -830,15 +833,15 @@ F test/aggnested.test 610b0ce2c3e8f3daee25f9752800ee8d785db10da4aa1fbeea0ea1aaba
 F test/aggorderby.test 7be65e743f82ee49ba62da1c799e59341d23884a99edfe093df0cdfaac94cbbb
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-F test/alter.test 3c00eff1e2036b9f93e9cd0f3d3e63750ac87ecb5bc71b9d7bd07cbf2ac4c494
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 F test/alter2.test 7e3d26ab409df52df887b366a63902c3429b935c41cb962fd58ffc25784f2f19
 F test/alter3.test dcdd5f850f30656a45a0f05e41abfb52b74bbf6ccba165d0f7adf6b0116e4fd6
 F test/alter4.test 37cafe164067a6590a0ee4cec780bddbbaa33dc50b11542dcfbe0e65626494fd
 F test/alterauth.test 63442ba61ceb0c1eeb63aac1f4f5cebfa509d352276059d27106ae256bafc959
 F test/alterauth2.test 4b74fa8f184f4736497317feb587b65759eb87d87acfe3a8ef433d4d18bb002b
 F test/altercol.test 3661c432aacb42bc2198dd4611bbb9c3b09fc73251b59edda046109103b8ac00
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-F test/altercons2.test 3c1f58312817df43aeada3b1827fdc3ce3fc50c6f49a95ef62cf4cbbae8583a0
+F test/altercons.test 9b036a956268eccd64761a6af3ab6f7b313c738392c7460b747d8aacd32589a2
+F test/altercons2.test 4933eadb035fc0ccfc34ed879f69a09051c53907f9dae9c3d36d25f93519ccc7
 F test/altercorrupt.test 2e1d705342cf9d7de884518ddbb053fd52d7e60d2b8869b7b63b2fda68435c12
 F test/alterdropcol.test a653a3945f964d26845ec0cd0a8e74189f46de3119a984c5bc45457da392612e
 F test/alterdropcol2.test 527fce683b200d620f560f666c44ae33e22728e990a10a48a543280dfd4b4d41
@@ -852,9 +855,9 @@ F test/altertab.test 8a2712f9076da5012a002d0b5cc0a421398a5bf61c25bab41b77c427586
 F test/altertab2.test 0889ba0700cc1cdb7bc7d25975aa61fece34f621de963d0886e2395716b38576
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 F test/altertrig.test b1590647076add5a47aea0f2236c609ca0bc8a7a2462463edd3e5882c7894802
-F test/amatch1.test b5ae7065f042b7f4c1c922933f4700add50cdb9f
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 F test/analyze.test 2fb21d7d64748636384e6cb8998dbf83968caf644c07fcb4f76c18f2e7ede94b
-F test/analyze3.test c5156cef33f04b90a6b9e9d5d0bbc273a0fb44147d4508407bf1080811e2c6c8
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 F test/analyze4.test 68bd069f3ac7ac1e652ddd9f04f57d5606ddb4208450f5297005db7aa0dd707d
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 F test/analyze6.test 028f5bdfc9e5b5294768fa9a7185b8cd1d019aa7aab5b2f8ee42d7271d9a3b28
@@ -878,7 +881,7 @@ F test/attach3.test c59d92791070c59272e00183b7353eeb94915976
 F test/attach4.test 00e754484859998d124d144de6d114d920f2ed6ca2f961e6a7f4183c714f885e
 F test/attachmalloc.test 67309af95c6b765c13e7d2279d7fccbef78e6eb0565d75d51cefd5dc88784549
 F test/auth.test 2a01bf5bf3a0f10adf8ae3a3fd2c05af8a8c1b7a52fae227adb4ccd931915b5c
-F test/auth2.test 9eb7fce9f34bf1f50d3f366fb3e606be5a2000a1
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 F test/auth3.test 76d20a7fa136d63bcfcf8bcb65c0b1455ed71078d81f22bcd0550d3eb18594ab
 F test/autoanalyze1.test b9cc3f32a990fa56669b668d237c6d53e983554ae80c0604992e18869a0b2dec
 F test/autoinc.test 9df9930966dbe92c55ef37a4d89112cfd537be0d0596d397177c12db9e581be0
@@ -899,7 +902,7 @@ F test/backup4.test 8f6fd48e0dfde77b9a3bb26dc471ede3e101df32
 F test/backup5.test ee5da6d7fe5082f5b9b0bbfa31d016f52412a2e4
 F test/backup_ioerr.test 4c3c7147cee85b024ecf6e150e090c32fdbb5135
 F test/backup_malloc.test 0c9abdf74c51e7bedb66d504cd684f28d4bd4027
-F test/badutf.test d5360fc31f643d37a973ab0d8b4fb85799c3169f
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 F test/badutf2.test f310fd3b24a491b6b77bccdf14923b85d6ebcce751068c180d93a6b8ff854399
 F test/basexx1.test 4ae6ddbd92a7ebcabb5d844664c3e755d29fb69c8ddcf0c8d59bbe4e07c23919
 F test/bc_common.tcl c70b896d1d4ce72f769d2c7c1fc15b2cb07559eb2093f2736c8ca51664b29ff5
@@ -914,7 +917,7 @@ F test/bestindex8.test 4d8b1e8f30a7f405988ce4dbcc2b95c0775f0bed9ec08e0291a07e2f3
 F test/bestindex9.test 1a4b93db117fd8abe74ae9be982f86aa72f01e60cd4ac541e6ede39673a451a0
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 F test/bestindexB.test 14db2f66ec9cc5064a74996033b74e5eec0fd2f3a327fbe34ff18de67e9d2671
-F test/bestindexC.test 95b4a527b1a5d07951d731604a6d4cf7e5a806b39cea0e7819d4c9667e11c3fc
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 F test/bestindexD.test 6a8f6f84990bcf17dfa59652a1f935beddb7afd96f8302830fbc86b0a13df3c3
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 F test/bestindexF.test 4e53d606cbde40a2254aa016d500c5b71766a4065b8541202d195a3d9fe11b1c
@@ -943,6 +946,8 @@ F test/btree02.test 7555a5440453d900410160a52554fe6478af4faf53098f7235f1f443d5a1
 F test/btreefault.test a82a23b0578bc587afbf9a622c8f54a54f63762f062ba8a35613cfee38ab42f9
 F test/busy.test caff7164c16ce06a53af51f9e4c2753d4cc64250e00790a5e48b9c4f4be37597
 F test/busy2.test 20823a5d7c42fb257d9f108c66312d90b1bb4ec3d80ba6b4e371073727560f98
+F test/c/malloc1.c 2869384011b5dc1f019ddd94e5248a1f2dfd07db06c6ce854793c91da173b811
+F test/c/snprintf1.c a66a1ce1195bd409740a60ebeea008686ce3fbacb445840fc0a45419823b7f3f
 F test/cache.test 13bc046b26210471ca6f2889aceb1ea52dc717de
 F test/cacheflush.test af25bb1509df04c1da10e38d8f322d66eceedf61
 F test/cachespill.test 895997f84a25b323b166aecb69baab2d6380ea98f9e0bcc688c4493c535cfab9
@@ -1039,7 +1044,7 @@ F test/dbfuzz001.test 6c9a4622029d69dc38926f115864b055cb2f39badd25ec22cbfb130c8b
 F test/dbfuzz2-seed1.db e6225c6f3d7b63f9c5b6867146a5f329d997ab105bee64644dc2b3a2f2aebaee
 F test/dbfuzz2.c 4b3c12de4d98b1b2d908ab03d217d4619e47c8b23d5e67f8a6f2b1bdee7cae23
 F test/dblwidth-a.sql 59dd59aa78ce8fd8ab631a3816516831f4e947b143039257e6fe132c3cea4171
-F test/dbpage.test 63fab1eb026bada121107e53436fa749bbf83281dc9dea17af422f7a5c0f289f
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 F test/dbpagefault.test ea39de2ca86041a9c6df1135645180a76d0a8da93ac159e2fafe38e39636530b
 F test/dbstatus.test 4a4221a883025ffd39696b3d1b3910b928fb097d77e671351acb35f3aed42759
 F test/dbstatus2.test a36518c0f0951d8fd5a3dc36f99948ad1af93fb7fc0d2e03e5bb5a643186cf52
@@ -1089,7 +1094,7 @@ F test/enc2.test 872afe58db772e7dfa1ad8e0759f8cc820e9efc8172d460fae83023101c2e43
 F test/enc3.test 55ef64416d72975c66167310a51dc9fc544ba3ae4858b8d5ab22f4cb6500b087
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 F test/errmsg.test eae9f091eb39ce7e20305de45d8e5d115b68fa856fba4ea6757b6ca3705ff7f9
 F test/errofst1.test 6da78363739ba8991f498396ab331b5d64e7ab5c4172c12b5884683ef523ac53
 F test/eval.test 73969a2d43a511bf44080c44485a8c4d796b6a4f038d19e491867081155692c0
@@ -1097,14 +1102,15 @@ F test/exclusive.test 7ff63be7503990921838d5c9f77f6e33e68e48ed1a9d48cd28745bf650
 F test/exclusive2.test cd70b1d9c6fffd336f9795b711dcc5d9ceba133ad3f7001da3fda63615bdc91e
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-F test/existsexpr.test 75c1c13cda18b53f68c135fe644afc034d72a6de5b0774b0219ca4a6dc4b96b0
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 F test/existsexpr2.test dc23e76389eff3d29f6488ff733012a3560cd67ec8cfaecbecd52cced5d5af11
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-F test/exprfault.test da33606d799718e2f8e34efd0e5858884a1ad87f608774c552a7f5517cc27181
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 F test/exprfault2.test c49e84273898969af5dbc4fe6a3f4335f14639799f343590336c9ddf84425965
 F test/expridx1.test b464520126e1d781a7800f8540621c82e8bbc526f089ff8b0b57ffc51feea6b7
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 F test/extension01.test 5de412c66276105901c370770175003381fdcb0c4da7054fa43cf4a31e0bfa3a
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 F test/extraquick.test cb254400bd42bfb777ff675356aabf3287978f79
@@ -1245,7 +1251,7 @@ F test/fuzz3.test 70ba57260364b83e964707b9d4b5625284239768ab907dd387c740c0370ce3
 F test/fuzz4.test c229bcdb45518a89e1d208a21343e061503460ac69fae1539320a89f572eb634
 F test/fuzz_common.tcl b7197de6ed1ee8250a4f82d67876f4561b42ee8cbbfc6160dcb66331bad3f830
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-F test/fuzzcheck.c 207d3d1c1d578928f16dec20df781c5d13c2fd4694b4d70e72242f4dcb799830
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 F test/fuzzdata1.db 3e86d9cf5aea68ddb8e27c02d7dfdaa226347426c7eb814918e4d95475bf8517
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 F test/fuzzdata3.db c6586d3e3cef0fbc18108f9bb649aa77bfc38aba
@@ -1308,7 +1314,7 @@ F test/init.test 15c823093fdabbf7b531fe22cf037134d09587a7
 F test/insert.test 97cfb30b83ca1622b9422a1e4c4831b4cb767cf5d654660945036d1e72067e70
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 F test/insert3.test 1b7db95a03ad9c5013fdf7d6722b6cd66ee55e30
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+F test/insert4.test 3186fea9f85a4c88f50a9a9b64d23a064fb765c34505691244952fc51c243382
 F test/insert5.test 79f6b6efd0d3db5f4e3ff442300b7d9e7185adb345b29aacc3ea5a9c58ab9beb
 F test/insertfault.test ac63d14ea3b49c573673a572f4014b9117383a03e497c58f308b5c776e4a7f74
 F test/instr.test 67ba309e9697c24a304e98a7c8f372456177dd4e32237d2a305e1e05f7bb79c2
@@ -1316,7 +1322,7 @@ F test/instrfault.test 95e28efade652e6d51ae11b377088fe523a581a07ec428009e152a4dd
 F test/intarray.test bb976b0b3df0ebb6a2eddfb61768280440e672beba5460ed49679ea984ccf440
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 F test/interrupt.test ac1ef50ec9ab8e4f0e17c47629f82539d4b22558904e321ed5abea2e6187da7a
-F test/interrupt2.test e4408ca770a6feafbadb0801e54a0dcd1a8d108d
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 F test/intpkey.test 7d54711acf553cdd641a40e9c6cfc2bf1a76070074940c1b126442517054320f
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 F test/io.test d267fdc8915444a45e19841489033ebe70bb69f6db605b00df70be16b2a80f59
@@ -1343,7 +1349,7 @@ F test/joinD.test 2ce62e7353a0702ca5e70008faf319c1d4686aa19fba34275c6d1da0e960be
 F test/joinE.test d5d182f3812771e2c0d97c9dcf5dbe4c41c8e21c82560e59358731c4a3981d6b
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 F test/joinH.test 1d2fc3190be68525fd9ce749b9468c40ba2930181e52fb5ee6f836051b38effb
-F test/joinI.test a4d37143fcc39e915d9feb08e614a13f88dfe332d77152a3c526a2370ddb9a70
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 F test/journal1.test bc61a4228db11bffca118bd358ba4b868524bf080f3532749de6c539656e20fa
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 F test/journal3.test e5aeff93a7776cf644dbc48dec277655cff80a1cd24689036abc87869b120ea6
@@ -1420,7 +1426,7 @@ F test/malloctraceviewer.tcl 3e3ddf11e30d2b20f53aa16aa6615082fb24a100bea61cca721
 F test/manydb.test 28385ae2087967aa05c38624cec7d96ec74feb3e
 F test/mem5.test c6460fba403c5703141348cd90de1c294188c68f
 F test/memdb.test c1f2a343ad14398d5d6debda6ea33e80d0dafcc7
-F test/memdb1.test c737ac9aa5895092332b1dde24fae7ae494b7fcbcd346d22d600891096a3836d
+F test/memdb1.test 413f845c0c2d20dc9808d4084de9e57d55759070eed2a4cf23cd30335a96c295
 F test/memdb2.test 4ba1fc09e2f51df80d148a540e4a3fa66d0462e91167b27497084de4d1f6b5b4
 F test/memjournal.test 70f3a00c7f84ee2978ad14e831231caa1e7f23915a2c54b4f775a021d5740c6c
 F test/memjournal2.test dbc2c5cb5f7b38950f4f6dc3e73fcecf0fcbed3fc32c7ce913bba164d288da1e
@@ -1489,6 +1495,7 @@ F test/orderbyB.test 32576c7b138105bc72f7fbf33bd320ca3a7d303641fc939e0e56af6cba8
 F test/oserror.test ee3fad06ec8671c4d047c2c92a567fc2e0e8161caaec7edd6d48325c5ac97f30
 F test/ossfuzz.c b5d232d9717fc999a121c82c4880ae5b9d7fb3ae55d2d87a8da906bc80020906
 F test/ossshell.c f125c5bd16e537a2549aa579b328dd1c59905e7ab1338dfc210e755bb7b69f17
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 F test/ovfl.test 199c482696defceacee8c8e0e0ef36da62726b2f
 F test/pager1.test b083c2d5d89df8e979658d9320bfc0b9d50b4ef8ae1d9e115a692ff0b9768393
 F test/pager2.test c0ede15952b607f9a38f653acdfa73c19e657958e9104aab1a71950ea7b71831
@@ -1513,8 +1520,8 @@ F test/pragma4.test 396ef9bff1fb966d41721545ad4b12bfc26aae315f5fe51d9b917828d49e
 F test/pragma5.test 7b33fc43e2e41abf17f35fb73f71b49671a380ea92a6c94b6ce530a25f8d9102
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-F test/printf.test bcb093ef5cbd17e2d94d93d62045ee61ed0f465c1ca123f284774e474e73a9ea
+F test/prefixes.test f2c4f30d5d439ca203ec69d72f5e1cc408916104e5310423542faef8003cf013
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 F test/printf2.test 3f55c1871a5a65507416076f6eb97e738d5210aeda7595a74ee895f2224cce60
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 F test/ptrchng.test ef1aa72d6cf35a2bbd0869a649b744e9d84977fc
@@ -1554,7 +1561,7 @@ F test/round1.test 29c3c9039936ed024d672f003c4d35ee11c14c0acb75c5f7d6188ff16190c
 F test/rowallock.test 3f88ec6819489d0b2341c7a7528ae17c053ab7cc
 F test/rowhash.test 0bc1d31415e4575d10cacf31e1a66b5cc0f8be81
 F test/rowid.test d27191b5ce794c05bf61081e8b2c546a1844c1641321dcaf7fb785234256cc8e
-F test/rowvalue.test 93474d8e1c496e970bdcc3a7f54ac835adda667d2fd971957b4bce0c0b11707b
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 F test/rowvalue2.test 060d238b7e5639a7c5630cb5e63e311b44efef2b
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 F test/rowvalue4.test 6e160977d44ee715e142f63ec0e339586c61f12bbbffacee369b1cdc0b7390f0
@@ -1563,7 +1570,7 @@ F test/rowvalue6.test d19b54feb604d5601f8614b15e214e0774c01087
 F test/rowvalue7.test 06ec0aca725bf683313d03793aa2943bc7f45a901848c7056a9665b769c8fc38
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 F test/rowvalue9.test 7499a8fd7ca3a3f0e19d94e135355439aa2b596f86b775ca8de79672da2ca378
-F test/rowvalueA.test 7d28bf6c2f8a2af8adbba2c4eda9136a4dd36250b8966ba05b34c0954f78efd7
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 F test/rowvaluefault.test 963ae9cdaed30a85a29668dd514e639f3556cae903ee9f172ea972d511c54fff
 F test/rowvaluevtab.test cd9747bb3f308086944c07968f547ad6b05022e698d80b9ffbdfe09ce0b8da6f
 F test/rtree.test 0c8d9dd458d6824e59683c19ab2ffa9ef946f798
@@ -1606,7 +1613,7 @@ F test/selectG.test 089f7d3d7e6db91566f00b036cb353107a2cca6220eb1cb264085a836dae
 F test/selectH.test 0b54599f1917d99568c9b929df22ec6261ed7b6d2f02a46b5945ef81b7871aac
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 F test/shared.test 50bd8091735b272732125928c363476a17b5fb264835de7d19e90c72055c888b
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 F test/shared3.test cb92d083003ddf0f313166e494ec2fcafa55fdebf648628923ded3169dba8850
@@ -1619,17 +1626,18 @@ F test/sharedA.test 64bdd21216dda2c6a3bd3475348ccdc108160f34682c97f2f51c19fc0e21
 F test/sharedB.test 1a84863d7a2204e0d42f2e1606577c5e92e4473fa37ea0f5bdf829e4bf8ee707
 F test/shared_err.test 32634e404a3317eeb94abc7a099c556a346fdb8fb3858dbe222a4cbb8926a939
 F test/sharedlock.test 5ede3c37439067c43b0198f580fd374ebf15d304
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+F test/shell-prompt.sql 8a320a78812d75349bd5e1a95178f7ff1f2194bb4cceee572865d127c51684b3
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 F test/shell2.test dc541d2681503e55466a24d35a4cbf8ca5b90b8fcdef37fc4db07373a67d31d3
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 F test/shell7.test 43fd8e511c533bab5232e95c7b4be93b243451709e89582600d4b6e67693d5c3
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 F test/shellA.test 05cdaafa1f79913654487ce3aefa038d4106245d58f52e02faf506140a76d480
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 F test/shmlock.test 9f1f729a7fe2c46c88b156af819ac9b72c0714ac6f7246638a73c5752b5fd13c
 F test/shortread1.test bb591ef20f0fd9ed26d0d12e80eee6d7ac8897a3
 F test/show_speedtest1_rtree.tcl 32e6c5f073d7426148a6936a0408f4b5b169aba5
@@ -1665,11 +1673,11 @@ F test/speed4p.explain 6b5f104ebeb34a038b2f714150f51d01143e59aa
 F test/speed4p.test 377a0c48e5a92e0b11c1c5ebb1bc9d83a7312c922bc0cb05970ef5d6a96d1f0c
 F test/speedtest.md ea0c85ebe0ecff8b45ba6cdb26e694871f469009a5a29dcfe634b055f05ab241
 F test/speedtest.tcl b06f6321ef90bb68f18f7b0e430e25203d9da79b80f8926986a0d5f21ac485fb x
-F test/speedtest1.c 6c01252e66f46de0b6b8d5316e03521e2151782104f3608c10262aa5dce85721
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 F test/spellfix.test 951a6405d49d1a23d6b78027d3877b4a33eeb8221dcab5704b499755bb4f552e
 F test/spellfix2.test dfc8f519a3fc204cb2dfa8b4f29821ae90f6f8c3
 F test/spellfix3.test 0f9efaaa502a0e0a09848028518a6fb096c8ad33
-F test/spellfix4.test 51c7c26514ade169855c66bcf130bd5acfb4d7fd090cc624645ab275ae6a41fb
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 F test/sqldiff1.test 1b7ab4f312442c5cc6b3a5f299fa8ca051416d1dd173cb1126fd51bf64f2c3fb
 F test/sqllimits1.test 408131e4975d61868711c83f101a56d4602313cc5cae88d3eee81c1da364fd89
 F test/sqllog.test 6af6cb0b09f4e44e1917e06ce85be7670302517a
@@ -1687,7 +1695,7 @@ F test/subquery.test 23087f9b1c15ab9cc5231d04946bdebc51db527c95eb9d7434a2222127e
 F test/subquery2.test ab96ff3fa9c4e3dce0d699f74e61c50250ed4335bc8f400e127707d552a8999e
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 F test/substr.test a673e3763e247e9b5e497a6cacbaf3da2bd8ec8921c0677145c109f2e633f36b
-F test/subtype1.test 96fd2a59bfc845c955b5f339d23b37ef4d50de5f8a04acd1450a68605fa2e3e7
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 F test/superlock.test 85256830339a6871ce36a2ef591c3f67716a701b5497788fb2068b90159c2442
 F test/swarmvtab.test 250231404fcac88f61a6c147bb0e3a118ed879278cd3ccb0ae2d3a729e1e8e26
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@@ -1699,7 +1707,7 @@ F test/sync.test a619e407ede58a7b6e3e44375328628559fc9695a9c24c47cb5690a866b0031
 F test/sync2.test 06152269ed73128782c450c355988fe8dd794d305833af75e1a5e79edd4dae47
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 F test/sysfault.test c9f2b0d8d677558f74de750c75e12a5454719d04
-F test/tabfunc01.test cfa96a9a235c39fb0cae69928b989b28bfec108f62d2533486f76e32dcedfdfb
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 F test/table.test e87294bf1c80bfd7792142b84ab32ea5beb4f3f71e535d7fb263a6b2068377bf
 F test/tableapi.test e37c33e6be2276e3a96bb54b00eea7f321277115d10e5b30fdb52a112b432750
 F test/tableopts.test dba698ba97251017b7c80d738c198d39ab747930
@@ -1714,8 +1722,8 @@ F test/temptrigfault.tes fc5918e64f3867156fefe7cfca9d8e1f495134a5229b2b511b0dc11
 F test/temptrigger.test a00f258ed8d21a0e8fd4f322f15e8cfb5cef2e43655670e07a753e3fb4769d61
 F test/tester.tcl 2d943f60200e0a36bcd3f1f0baf181a751cd3604ef6b6bd4c8dc39b4e8a53116
 F test/testloadext.c 862b848783eaed9985fbce46c65cd214664376b549fae252b364d5d1ef350a27
-F test/testrunner.tcl 3b6cbceb4d7f0226d51a7fde247cc5592565953568c18155c8c3a454d93bee71 x
-F test/testrunner_data.tcl 48c8a230fcada37f4809f95c2ba49e44bc3d520b6165c09173249c6e65b01cc1
+F test/testrunner.tcl 8f9cd46fe10f670f7f1f3430323f6031a13690303bd7810042d4bb20c47c5d9b x
+F test/testrunner_data.tcl 4b3cf036d39c98b83f9289a5c047eb01089c932d4f59a81bf764f6800589b959
 F test/testrunner_estwork.tcl 81e2ae10238f50540f42fbf2d94913052a99bfb494b69e546506323f195dcff9
 F test/thread001.test a0985c117eab62c0c65526e9fa5d1360dd1cac5b03bde223902763274ce21899
 F test/thread002.test c24c83408e35ba5a952a3638b7ac03ccdf1ce4409289c54a050ac4c5f1de7502
@@ -1884,7 +1892,7 @@ F test/trace3.test 2deeac66359c9f007f0fc9fb6336994a5d68fc1a65129f322a9e9546fd537
 F test/trans.test 45f6f9ab6f66a7b5744f1caac06b558f95da62501916906cf55586a896f9f439
 F test/trans2.test 62bd045bfc7a1c14c5ba83ba64d21ade31583f76
 F test/trans3.test 91a100e5412b488e22a655fe423a14c26403ab94
-F test/transitive1.test f8ee983600b33d167da1885657f064aec404e1c0d0bc8765fdf163f4c749237a
+F test/transitive1.test 342b398e4c68deee65a940c5af22a95f44c3090b6539c7a19175afb48ac3fb93
 F test/trigger1.test 141bd2bbfa82fa91aed7391f50517373c9823ff8f55af35e56313dbc75112ca1
 F test/trigger2.test 30fcb3a6aa6782020d47968735ee6086ed795f73a7affa9406c8d5a36e7b5265
 F test/trigger3.test aa640bb2bbb03edd5ff69c055117ea088f121945
@@ -1922,7 +1930,7 @@ F test/unique.test 93f8b2ef5ea51b9495f8d6493429b1fd0f465264
 F test/unique2.test 3674e9f2a3f1fbbfd4772ac74b7a97090d0f77d2
 F test/unixexcl.test d2366ef2d3d95249314307861d748924d9ab4f24305541159a08be61ccd4a9ee
 F test/unordered.test 0edaf3411d300693bca595897c5201421c6c5ec787990a1dfe2f7f60ae93f1e2
-F test/update.test 258dcf26d401177d3cb7fdf0beab14d671dbe72e8ff6e0435fd85a08fcd57bd9
+F test/update.test 93fba5f7505f7a7b25d66135d98d9b055b7f1bd627a7e514dbba1ea6213f0c41
 F test/update2.test 67455bc61fcbcf96923c45b3bc4f87bc72be7d67575ad35f134906148c7b06d3
 F test/upfrom1.tcl 8859d9d437f03b44174c4524a7a734a391fd4526fcff65be08285dafc9dc9041
 F test/upfrom1.test 8cb06689e99cd707d884faa16da0e8eb26ff658bb01c47ddf72fadade666e6e1
@@ -2026,7 +2034,7 @@ F test/walslow.test 0c51843836c9dcf40a5ac05aa781bfb977b396ee2c872d92bd48b79d5dd9
 F test/walthread.test d562f51a61191ccfab64940df7aa1cef87c902fa5ab742590ef7f859dfe6a44b
 F test/walvfs.test e1a6ad0f3c78e98b55c3d5f0889cf366cc0d0a1cb2bccb44ac9ec67384adc4a1
 F test/where.test 5087c72d26fd075a1644c8512be9fe18de9bf2d2b0754f7fd9b74a1c6540c4fc
-F test/where2.test 1dbff4ab847068a52b927a0c1a7cf7faed4c8cae081fbcdac9b052a3a209aefa
+F test/where2.test b73f8ee8f94b850764c429efe2d48171090628737dcc3df64a9f2214da02089f
 F test/where3.test 4ccb156ae33de86414a52775a6f590a9d60ba2cbc7a93a24fa331b7bcf5b6030
 F test/where4.test 4a371bfcc607f41d233701bdec33ac2972908ba8
 F test/where5.test fdf66f96d29a064b63eb543e28da4dfdccd81ad2
@@ -2073,10 +2081,10 @@ F test/window8.tcl c57364e64d816f6e26df60437e1202e2c1031c7b818a1a67535d1006862a0
 F test/window8.test 3d931e58802b8ab8063da00f0cf30aa3351640238a952c0efb5a129e2349a4bb
 F test/window9.test 7b98a7916dd87763ea35f56ea023e3b29e99744582204ccf2937a3bac411cd4d
 F test/windowA.test 6d63dc1260daa17141a55007600581778523a8b420629f1282d2acfc36af23be
-F test/windowB.test aad7c31739999f68a98a813cfd78390918fc70f56d2d925317a1523cab548ecf
+F test/windowB.test bba3bee77c1d3321077ff8951d543161d74f08f78633d84433ced7d6261dc2c2
 F test/windowC.test 6fd75f5bb2f1343d34e470e36e68f0ff638d8a42f6aa7d99471261b31a0d42f2
 F test/windowD.test 65cf5a765fb8072450e8a0de2979ce7f09a38d87724fe1280c6444073e3da49b
-F test/windowE.test d045a5fbaaf50ecac9483e1249dd317ba4f9d189c405a730ba6effdefb87b94f
+F test/windowE.test a82a4213c7b923220de5e457cb76c537a5d10d5e94641e3055ba21b79870a7fb
 F test/windowerr.tcl f5acd6fbc210d7b5546c0e879d157888455cd4a17a1d3f28f07c1c8a387019e0
 F test/windowerr.test a8b752402109c15aa1c5efe1b93ccb0ce1ef84fa964ae1cd6684dd0b3cc1819b
 F test/windowfault.test 15094c1529424e62f798bc679e3fe9dfab6e8ba2f7dfe8c923b6248c31660a7c
@@ -2108,7 +2116,7 @@ F tool/GetTclKit.bat d84033c6a93dfe735d247f48ba00292a1cc284dcf69963e5e672444e045
 F tool/Replace.cs 02c67258801c2fb5f63231e0ac0f220b4b36ba91
 F tool/build-all-msvc.bat 1ee9dbadcc07fc23268025854e97b392bcbad72376b47aee7b22f3797a4f2c87 x
 F tool/build-shell.sh 369c4b171cc877ad974fef691e4da782b4c1e99fe8f4361316c735f64d49280f
-F tool/buildtclext.tcl d09b753d7858314104eeaf5f4def85d35784470279809e47a633f142226f2b3f
+F tool/buildtclext.tcl b58df93e772fec8b2ae44ee1a82d13378e13edb1e94c4ab2f7ee3440a9523bff
 F tool/cg_anno.tcl c1f875f5a4c9caca3d59937b16aff716f8b1883935f1b4c9ae23124705bc8099 x
 F tool/checkSpacing.c 810e51703529a204fc4e1eb060e9ab663e3c06d2
 F tool/cktclsh.sh 6075eef9c6b9ba4b38fef2ca2a66d25f2311bd3c610498d18a9b01f861629cca
@@ -2129,7 +2137,7 @@ F tool/genfkey.test b6afd7b825d797a1e1274f519ab5695373552ecad5cd373530c63533638a
 F tool/getlock.c f4c39b651370156cae979501a7b156bdba50e7ce
 F tool/index_usage.c f62a0c701b2c7ff2f3e21d206f093c123f222dbf07136a10ffd1ca15a5c706c5
 F tool/lemon.c 3fdc16b23f1ea0c91c049b518fc3f75c71843dbfe2b447fcb3cd92d9e4f219f8
-F tool/lempar.c b57e1780bf8098dd4a9a5bba537f994276ea825a420f6165153e5894dc2dfb07
+F tool/lempar.c a8de510526f9cbfb45ff0aca9d16f1c828600246f198c1c7d49c8d5492142ffa
 F tool/libvers.c caafc3b689638a1d88d44bc5f526c2278760d9b9
 F tool/loadfts.c 63412f9790e5e8538fbde0b4f6db154aaaf80f7a10a01e3c94d14b773a8dd5a6
 F tool/logest.c c34e5944318415de513d29a6098df247a9618c96d83c38d4abd88641fe46e669
@@ -2162,6 +2170,7 @@ F tool/omittest-msvc.tcl d6b8f501ac1d7798c4126065030f89812379012cad98a1735d6d722
 F tool/omittest.tcl 436b7072e00e25e9b77145a9f67aa8e0eeabd186168827435fd03f8f981aac32
 F tool/opcodesum.tcl 740ed206ba8c5040018988129abbf3089a0ccf4a
 F tool/pagesig.c f98909b4168d9cac11a2de7f031adea0e2f3131faa7515a72807c03ec58eafeb
+F tool/renumber-win-thunk.tcl d6320eeba3a1ddfa4624003ad77e96a01819e56b4df58a698c2267ea71b79d39
 F tool/replace.tcl 511c61acfe563dfb58675efb4628bb158a13d48ff8322123ac447e9d25a82d9a
 F tool/restore_jrnl.tcl 1079ecba47cc82fa82115b81c1f68097ab1f956f357ee8da5fc4b2589af6bd98
 F tool/rollback-test.c 9fc98427d1e23e84429d7e6d07d9094fbdec65a5
@@ -2176,7 +2185,7 @@ F tool/soak1.tcl a3892082ed1079671565c044e93b55c3c7f38829aedf53cc597c65d23ffdadd
 F tool/spaceanal.tcl 1f83962090a6b60e1d7bf92495d643e622bef9fe82ea3f2d22350dcbce9a12d0
 F tool/spellsift.tcl 52b4b04dc4333c7ab024f09d9d66ed6b6f7c6eb00b38497a09f338fa55d40618 x
 F tool/split-sqlite3c.tcl 4969fd642dad0ea483e4e104163021d92baf98f6a8eac981fe48525f9b873430
-F tool/sqldiff.c 847edc1e0d1e1feb652d3d6128e504456deaf254ab9ad3e7cebd4317d2037182
+F tool/sqldiff.c de59a4eecbc802db8ad053889c10e6f8b8427b6f349199ee79938c92c20860dd
 F tool/sqlite3_analyzer.c.in 14f02cb5ec3c264cd6107d1f1dad77092b1cf440fc196c30b69ae87b56a1a43b
 F tool/sqlite3_rsync.c f510a8b230e1c5b0f62842acd0e94ff15d2f77a00ae782f7d20f9e39919fa19b
 F tool/sqltclsh.c.in c103c6fc7d42bce611f9d4596774d60b7ef3d0b291a1f58c9e6184e458b89296
@@ -2197,8 +2206,8 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P 6aafb76c74b73aafef74250dae9c8cbe73226c0efb606e8f80ea761b3293cf9d
-R 10023fb5872b0939880b2eb9aec2ef11
-U drh
-Z c3b3ebd71cd1378ad565509dcb2c7b21
+P c6226d508d6af28fcd42fecd482014c3e284923871d3d8f5177f728cbf3457c5
+R 1eabf6c03fde51e4f558b57e68078de8
+U dan
+Z 7d1f8058359dfe62c0d29a8d06d235a4
 # Remove this line to create a well-formed Fossil manifest.

manifest.tags

@@ -1,2 +1,2 @@
-branch cli-prompt-redo
-tag cli-prompt-redo
+branch session-update-loops
+tag session-update-loops

manifest.uuid

@@ -1 +1 @@
-354325b6f396bda38bbb82e7d38aa50d3d6441e1ebb9b578aed8e0bcf62f9911
+eba02092bcf1713a646ecf8febd53a83bc803cf1b17e2e4fc590c14d886a8d27

src/alter.c

@@ -2798,7 +2798,9 @@ void sqlite3AlterDropConstraint(
   if( !pTab ) return;
 
   if( pCons ){
-    zArg = sqlite3MPrintf(db, "%.*Q", pCons->n, pCons->z);
+    char *z = sqlite3NameFromToken(db, pCons);
+    zArg = sqlite3MPrintf(db, "%Q", z);
+    sqlite3DbFree(db, z);
   }else{
     int iCol;
     if( alterFindCol(pParse, pTab, pCol, &iCol) ) return;
@@ -2985,19 +2987,31 @@ void sqlite3AlterAddConstraint(
   SrcList *pSrc,           /* Table to add constraint to */
   Token *pFirst,           /* First token of new constraint */
   Token *pName,            /* Name of new constraint. NULL if name omitted. */
-  const char *pExpr,       /* Text of CHECK expression */
-  int nExpr                /* Size of pExpr in bytes */
+  const char *zExpr,       /* Text of CHECK expression */
+  int nExpr,               /* Size of pExpr in bytes */
+  Expr *pExpr              /* The parsed CHECK expression */
 ){ 
   Table *pTab = 0;         /* Table identified by pSrc */
   int iDb = 0;             /* Which schema does pTab live in */
   const char *zDb = 0;     /* Name of the schema in which pTab lives */
   const char *pCons = 0;   /* Text of the constraint */
   int nCons;               /* Bytes of text to use from pCons[] */
+  int rc;                  /* Result from error checking pExpr */
 
   /* Look up the table being altered. */
   assert( pSrc->nSrc==1 );
   pTab = alterFindTable(pParse, pSrc, &iDb, &zDb, 1);
-  if( !pTab ) return;
+  if( !pTab ){
+    sqlite3ExprDelete(pParse->db, pExpr);
+    return;
+  }
+
+  /* Verify that the new CHECK constraint does not contain any
+  ** internal-use-only function.  Forum post 2026-05-10T01:11:28Z
+  */
+  rc = sqlite3ResolveSelfReference(pParse, pTab, NC_IsCheck, pExpr, 0);
+  sqlite3ExprDelete(pParse->db, pExpr);
+  if( rc ) return;
 
   /* If this new constraint has a name, check that it is not a duplicate of
   ** an existing constraint. It is an error if it is.  */
@@ -3018,7 +3032,7 @@ void sqlite3AlterAddConstraint(
   sqlite3NestedParse(pParse,
       "SELECT sqlite_fail('constraint failed', %d) "
       "FROM %Q.%Q WHERE (%.*s) IS NOT TRUE", 
-      SQLITE_CONSTRAINT, zDb, pTab->zName, nExpr, pExpr
+      SQLITE_CONSTRAINT, zDb, pTab->zName, nExpr, zExpr
   );
 
   /* Edit the SQL for the named table. */

src/attach.c

@@ -106,6 +106,16 @@ static void attachFunc(
     ** from sqlite3_deserialize() to close database db->init.iDb and
     ** reopen it as a MemDB */
     Btree *pNewBt = 0;
+
+    pNew = &db->aDb[db->init.iDb];
+    assert( pNew->pBt!=0 );
+    if( sqlite3BtreeTxnState(pNew->pBt)!=SQLITE_TXN_NONE
+     || sqlite3BtreeIsInBackup(pNew->pBt)
+    ){
+      rc = SQLITE_BUSY;
+      goto attach_error;
+    }
+
     pVfs = sqlite3_vfs_find("memdb");
     if( pVfs==0 ) return;
     rc = sqlite3BtreeOpen(pVfs, "x\0", db, &pNewBt, 0, SQLITE_OPEN_MAIN_DB);
@@ -115,8 +125,7 @@ static void attachFunc(
         /* Both the Btree and the new Schema were allocated successfully.
         ** Close the old db and update the aDb[] slot with the new memdb
         ** values.  */
-        pNew = &db->aDb[db->init.iDb];
-        if( ALWAYS(pNew->pBt) ) sqlite3BtreeClose(pNew->pBt);
+        sqlite3BtreeClose(pNew->pBt);
         pNew->pBt = pNewBt;
         pNew->pSchema = pNewSchema;
       }else{

src/auth.c

@@ -189,8 +189,14 @@ void sqlite3AuthRead(
 ** either SQLITE_OK (zero) or SQLITE_IGNORE or SQLITE_DENY.  If SQLITE_DENY
 ** is returned, then the error count and error message in pParse are
 ** modified appropriately.
+**
+** Divided into two routines.  realAuthCheck() does the work.  The
+** sqlite3AuthCheck() routine is usually a fast no-op but invokes
+** realAuthCheck() (and spends time doing some stack pushes and pops
+** as a result) in the uncommon case where an authorization check is
+** actually needed.
 */
-int sqlite3AuthCheck(
+static int SQLITE_NOINLINE realAuthCheck(
   Parse *pParse,
   int code,
   const char *zArg1,
@@ -204,7 +210,7 @@ int sqlite3AuthCheck(
   ** or if the parser is being invoked from within sqlite3_declare_vtab.
   */
   assert( !IN_RENAME_OBJECT || db->xAuth==0 );
-  if( db->xAuth==0 || db->init.busy || IN_SPECIAL_PARSE ){
+  if( IN_SPECIAL_PARSE ){
     return SQLITE_OK;
   }
 
@@ -229,6 +235,19 @@ int sqlite3AuthCheck(
   }
   return rc;
 }
+int sqlite3AuthCheck(
+  Parse *pParse,
+  int code,
+  const char *zArg1,
+  const char *zArg2,
+  const char *zArg3
+){
+  if( pParse->db->xAuth!=0 && pParse->db->init.busy==0 ){
+    return realAuthCheck(pParse,code,zArg1,zArg2,zArg3);
+  }else{
+    return SQLITE_OK;
+  }
+}
 
 /*
 ** Push an authorization context.  After this routine is called, the

src/backup.c

@@ -20,13 +20,13 @@
 */
 struct sqlite3_backup {
   sqlite3* pDestDb;        /* Destination database handle */
-  Btree *pDest;            /* Destination b-tree file */
+  Db *pDest;               /* Destination db file */
   u32 iDestSchema;         /* Original schema cookie in destination */
   int bDestLocked;         /* True once a write-transaction is open on pDest */
 
   Pgno iNext;              /* Page number of the next source page to copy */
   sqlite3* pSrcDb;         /* Source database handle */
-  Btree *pSrc;             /* Source b-tree file */
+  Db *pSrc;                /* Source db file */
 
   int rc;                  /* Backup process error code */
 
@@ -79,7 +79,7 @@ struct sqlite3_backup {
 ** function. If an error occurs while doing so, return 0 and write an 
 ** error message to pErrorDb.
 */
-static Btree *findBtree(sqlite3 *pErrorDb, sqlite3 *pDb, const char *zDb){
+static Db *findDatabase(sqlite3 *pErrorDb, sqlite3 *pDb, const char *zDb){
   int i = sqlite3FindDbName(pDb, zDb);
 
   if( i==1 ){
@@ -102,7 +102,7 @@ static Btree *findBtree(sqlite3 *pErrorDb, sqlite3 *pDb, const char *zDb){
     return 0;
   }
 
-  return pDb->aDb[i].pBt;
+  return &pDb->aDb[i];
 }
 
 /*
@@ -110,9 +110,9 @@ static Btree *findBtree(sqlite3 *pErrorDb, sqlite3 *pDb, const char *zDb){
 ** of the source.
 */
 static int setDestPgsz(sqlite3_backup *p){
-  int rc;
-  rc = sqlite3BtreeSetPageSize(p->pDest,sqlite3BtreeGetPageSize(p->pSrc),0,0);
-  return rc;
+  return sqlite3BtreeSetPageSize(p->pDest->pBt,
+      sqlite3BtreeGetPageSize(p->pSrc->pBt), 0, 0
+  );
 }
 
 /*
@@ -181,15 +181,15 @@ sqlite3_backup *sqlite3_backup_init(
 
   /* If the allocation succeeded, populate the new object. */
   if( p ){
-    p->pSrc = findBtree(pDestDb, pSrcDb, zSrcDb);
-    p->pDest = findBtree(pDestDb, pDestDb, zDestDb);
+    p->pSrc = findDatabase(pDestDb, pSrcDb, zSrcDb);
+    p->pDest = findDatabase(pDestDb, pDestDb, zDestDb);
     p->pDestDb = pDestDb;
     p->pSrcDb = pSrcDb;
     p->iNext = 1;
     p->isAttached = 0;
 
     if( 0==p->pSrc || 0==p->pDest 
-     || checkReadTransaction(pDestDb, p->pDest)!=SQLITE_OK 
+     || checkReadTransaction(pDestDb, p->pDest->pBt)!=SQLITE_OK 
      ){
       /* One (or both) of the named databases did not exist or an OOM
       ** error was hit. Or there is a transaction open on the destination
@@ -201,7 +201,7 @@ sqlite3_backup *sqlite3_backup_init(
     }
   }
   if( p ){
-    p->pSrc->nBackup++;
+    p->pSrc->pBt->nBackup++;
   }
 
   sqlite3_mutex_leave(pDestDb->mutex);
@@ -229,18 +229,18 @@ static int backupOnePage(
   const u8 *zSrcData,             /* Source database page data */
   int bUpdate                     /* True for an update, false otherwise */
 ){
-  Pager * const pDestPager = sqlite3BtreePager(p->pDest);
-  const int nSrcPgsz = sqlite3BtreeGetPageSize(p->pSrc);
-  int nDestPgsz = sqlite3BtreeGetPageSize(p->pDest);
+  Pager * const pDestPager = sqlite3BtreePager(p->pDest->pBt);
+  const int nSrcPgsz = sqlite3BtreeGetPageSize(p->pSrc->pBt);
+  int nDestPgsz = sqlite3BtreeGetPageSize(p->pDest->pBt);
   const int nCopy = MIN(nSrcPgsz, nDestPgsz);
   const i64 iEnd = (i64)iSrcPg*(i64)nSrcPgsz;
   int rc = SQLITE_OK;
   i64 iOff;
 
-  assert( sqlite3BtreeGetReserveNoMutex(p->pSrc)>=0 );
+  assert( sqlite3BtreeGetReserveNoMutex(p->pSrc->pBt)>=0 );
   assert( p->bDestLocked );
   assert( !isFatalError(p->rc) );
-  assert( iSrcPg!=PENDING_BYTE_PAGE(p->pSrc->pBt) );
+  assert( iSrcPg!=PENDING_BYTE_PAGE(p->pSrc->pBt->pBt) );
   assert( zSrcData );
   assert( nSrcPgsz==nDestPgsz || sqlite3PagerIsMemdb(pDestPager)==0 );
 
@@ -251,7 +251,7 @@ static int backupOnePage(
   for(iOff=iEnd-(i64)nSrcPgsz; rc==SQLITE_OK && iOff<iEnd; iOff+=nDestPgsz){
     DbPage *pDestPg = 0;
     Pgno iDest = (Pgno)(iOff/nDestPgsz)+1;
-    if( iDest==PENDING_BYTE_PAGE(p->pDest->pBt) ) continue;
+    if( iDest==PENDING_BYTE_PAGE(p->pDest->pBt->pBt) ) continue;
     if( SQLITE_OK==(rc = sqlite3PagerGet(pDestPager, iDest, &pDestPg, 0))
      && SQLITE_OK==(rc = sqlite3PagerWrite(pDestPg))
     ){
@@ -269,7 +269,7 @@ static int backupOnePage(
       memcpy(zOut, zIn, nCopy);
       ((u8 *)sqlite3PagerGetExtra(pDestPg))[0] = 0;
       if( iOff==0 && bUpdate==0 ){
-        sqlite3Put4byte(&zOut[28], sqlite3BtreeLastPage(p->pSrc));
+        sqlite3Put4byte(&zOut[28], sqlite3BtreeLastPage(p->pSrc->pBt));
       }
     }
     sqlite3PagerUnref(pDestPg);
@@ -301,8 +301,8 @@ static int backupTruncateFile(sqlite3_file *pFile, i64 iSize){
 */
 static void attachBackupObject(sqlite3_backup *p){
   sqlite3_backup **pp;
-  assert( sqlite3BtreeHoldsMutex(p->pSrc) );
-  pp = sqlite3PagerBackupPtr(sqlite3BtreePager(p->pSrc));
+  assert( sqlite3BtreeHoldsMutex(p->pSrc->pBt) );
+  pp = sqlite3PagerBackupPtr(sqlite3BtreePager(p->pSrc->pBt));
   p->pNext = *pp;
   *pp = p;
   p->isAttached = 1;
@@ -316,20 +316,26 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
   int destMode;       /* Destination journal mode */
   int pgszSrc = 0;    /* Source page size */
   int pgszDest = 0;   /* Destination page size */
+  Btree *pDest;
+  Btree *pSrc;
 
 #ifdef SQLITE_ENABLE_API_ARMOR
   if( p==0 ) return SQLITE_MISUSE_BKPT;
 #endif
+  assert( p->pDest );
+  assert( p->pSrc );
+  pDest = p->pDest->pBt;
+  pSrc = p->pSrc->pBt;
   sqlite3_mutex_enter(p->pSrcDb->mutex);
-  sqlite3BtreeEnter(p->pSrc);
+  sqlite3BtreeEnter(pSrc);
   if( p->pDestDb ){
     sqlite3_mutex_enter(p->pDestDb->mutex);
   }
 
   rc = p->rc;
   if( !isFatalError(rc) ){
-    Pager * const pSrcPager = sqlite3BtreePager(p->pSrc);     /* Source pager */
-    Pager * const pDestPager = sqlite3BtreePager(p->pDest);   /* Dest pager */
+    Pager * const pSrcPager = sqlite3BtreePager(pSrc);     /* Source pager */
+    Pager * const pDestPager = sqlite3BtreePager(pDest);   /* Dest pager */
     int ii;                            /* Iterator variable */
     int nSrcPage = -1;                 /* Size of source db in pages */
     int bCloseTrans = 0;               /* True if src db requires unlocking */
@@ -337,7 +343,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
     /* If the source pager is currently in a write-transaction, return
     ** SQLITE_BUSY immediately.
     */
-    if( p->pDestDb && p->pSrc->pBt->inTransaction==TRANS_WRITE ){
+    if( p->pDestDb && pSrc->pBt->inTransaction==TRANS_WRITE ){
       rc = SQLITE_BUSY;
     }else{
       rc = SQLITE_OK;
@@ -347,8 +353,8 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
     ** one now. If a transaction is opened here, then it will be closed
     ** before this function exits.
     */
-    if( rc==SQLITE_OK && SQLITE_TXN_NONE==sqlite3BtreeTxnState(p->pSrc) ){
-      rc = sqlite3BtreeBeginTrans(p->pSrc, 0, 0);
+    if( rc==SQLITE_OK && SQLITE_TXN_NONE==sqlite3BtreeTxnState(pSrc) ){
+      rc = sqlite3BtreeBeginTrans(pSrc, 0, 0);
       bCloseTrans = 1;
     }
 
@@ -364,7 +370,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
 
     /* Lock the destination database, if it is not locked already. */
     if( SQLITE_OK==rc && p->bDestLocked==0
-     && SQLITE_OK==(rc = sqlite3BtreeBeginTrans(p->pDest, 2,
+     && SQLITE_OK==(rc = sqlite3BtreeBeginTrans(pDest, 2,
                                                 (int*)&p->iDestSchema)) 
     ){
       p->bDestLocked = 1;
@@ -372,9 +378,9 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
 
     /* Do not allow backup if the destination database is in WAL mode
     ** and the page sizes are different between source and destination */
-    pgszSrc = sqlite3BtreeGetPageSize(p->pSrc);
-    pgszDest = sqlite3BtreeGetPageSize(p->pDest);
-    destMode = sqlite3PagerGetJournalMode(sqlite3BtreePager(p->pDest));
+    pgszSrc = sqlite3BtreeGetPageSize(pSrc);
+    pgszDest = sqlite3BtreeGetPageSize(pDest);
+    destMode = sqlite3PagerGetJournalMode(sqlite3BtreePager(pDest));
     if( SQLITE_OK==rc 
      && (destMode==PAGER_JOURNALMODE_WAL || sqlite3PagerIsMemdb(pDestPager))
      && pgszSrc!=pgszDest 
@@ -385,11 +391,11 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
     /* Now that there is a read-lock on the source database, query the
     ** source pager for the number of pages in the database.
     */
-    nSrcPage = (int)sqlite3BtreeLastPage(p->pSrc);
+    nSrcPage = (int)sqlite3BtreeLastPage(pSrc);
     assert( nSrcPage>=0 );
     for(ii=0; (nPage<0 || ii<nPage) && p->iNext<=(Pgno)nSrcPage && !rc; ii++){
       const Pgno iSrcPg = p->iNext;                 /* Source page number */
-      if( iSrcPg!=PENDING_BYTE_PAGE(p->pSrc->pBt) ){
+      if( iSrcPg!=PENDING_BYTE_PAGE(pSrc->pBt) ){
         DbPage *pSrcPg;                             /* Source page object */
         rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg,PAGER_GET_READONLY);
         if( rc==SQLITE_OK ){
@@ -416,18 +422,18 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
     */
     if( rc==SQLITE_DONE ){
       if( nSrcPage==0 ){
-        rc = sqlite3BtreeNewDb(p->pDest);
+        rc = sqlite3BtreeNewDb(pDest);
         nSrcPage = 1;
       }
       if( rc==SQLITE_OK || rc==SQLITE_DONE ){
-        rc = sqlite3BtreeUpdateMeta(p->pDest,1,p->iDestSchema+1);
+        rc = sqlite3BtreeUpdateMeta(pDest,1,p->iDestSchema+1);
       }
       if( rc==SQLITE_OK ){
         if( p->pDestDb ){
           sqlite3ResetAllSchemasOfConnection(p->pDestDb);
         }
         if( destMode==PAGER_JOURNALMODE_WAL ){
-          rc = sqlite3BtreeSetVersion(p->pDest, 2);
+          rc = sqlite3BtreeSetVersion(pDest, 2);
         }
       }
       if( rc==SQLITE_OK ){
@@ -444,12 +450,12 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
         ** journalled by PagerCommitPhaseOne() before they are destroyed
         ** by the file truncation.
         */
-        assert( pgszSrc==sqlite3BtreeGetPageSize(p->pSrc) );
-        assert( pgszDest==sqlite3BtreeGetPageSize(p->pDest) );
+        assert( pgszSrc==sqlite3BtreeGetPageSize(pSrc) );
+        assert( pgszDest==sqlite3BtreeGetPageSize(pDest) );
         if( pgszSrc<pgszDest ){
           int ratio = pgszDest/pgszSrc;
           nDestTruncate = (nSrcPage+ratio-1)/ratio;
-          if( nDestTruncate==(int)PENDING_BYTE_PAGE(p->pDest->pBt) ){
+          if( nDestTruncate==(int)PENDING_BYTE_PAGE(pDest->pBt) ){
             nDestTruncate--;
           }
         }else{
@@ -477,7 +483,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
           assert( pFile );
           assert( nDestTruncate==0 
               || (i64)nDestTruncate*(i64)pgszDest >= iSize || (
-                nDestTruncate==(int)(PENDING_BYTE_PAGE(p->pDest->pBt)-1)
+                nDestTruncate==(int)(PENDING_BYTE_PAGE(pDest->pBt)-1)
              && iSize>=PENDING_BYTE && iSize<=PENDING_BYTE+pgszDest
           ));
 
@@ -489,7 +495,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
           ** journal file.  */
           sqlite3PagerPagecount(pDestPager, &nDstPage);
           for(iPg=nDestTruncate; rc==SQLITE_OK && iPg<=(Pgno)nDstPage; iPg++){
-            if( iPg!=PENDING_BYTE_PAGE(p->pDest->pBt) ){
+            if( iPg!=PENDING_BYTE_PAGE(pDest->pBt) ){
               DbPage *pPg;
               rc = sqlite3PagerGet(pDestPager, iPg, &pPg, 0);
               if( rc==SQLITE_OK ){
@@ -533,7 +539,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
     
         /* Finish committing the transaction to the destination database. */
         if( SQLITE_OK==rc
-         && SQLITE_OK==(rc = sqlite3BtreeCommitPhaseTwo(p->pDest, 0))
+         && SQLITE_OK==(rc = sqlite3BtreeCommitPhaseTwo(pDest, 0))
         ){
           rc = SQLITE_DONE;
         }
@@ -547,8 +553,8 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
     */
     if( bCloseTrans ){
       TESTONLY( int rc2 );
-      TESTONLY( rc2  = ) sqlite3BtreeCommitPhaseOne(p->pSrc, 0);
-      TESTONLY( rc2 |= ) sqlite3BtreeCommitPhaseTwo(p->pSrc, 0);
+      TESTONLY( rc2  = ) sqlite3BtreeCommitPhaseOne(pSrc, 0);
+      TESTONLY( rc2 |= ) sqlite3BtreeCommitPhaseTwo(pSrc, 0);
       assert( rc2==SQLITE_OK );
     }
   
@@ -560,7 +566,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
   if( p->pDestDb ){
     sqlite3_mutex_leave(p->pDestDb->mutex);
   }
-  sqlite3BtreeLeave(p->pSrc);
+  sqlite3BtreeLeave(pSrc);
   sqlite3_mutex_leave(p->pSrcDb->mutex);
   return rc;
 }
@@ -577,17 +583,17 @@ int sqlite3_backup_finish(sqlite3_backup *p){
   if( p==0 ) return SQLITE_OK;
   pSrcDb = p->pSrcDb;
   sqlite3_mutex_enter(pSrcDb->mutex);
-  sqlite3BtreeEnter(p->pSrc);
+  sqlite3BtreeEnter(p->pSrc->pBt);
   if( p->pDestDb ){
     sqlite3_mutex_enter(p->pDestDb->mutex);
   }
 
   /* Detach this backup from the source pager. */
   if( p->pDestDb ){
-    p->pSrc->nBackup--;
+    p->pSrc->pBt->nBackup--;
   }
   if( p->isAttached ){
-    pp = sqlite3PagerBackupPtr(sqlite3BtreePager(p->pSrc));
+    pp = sqlite3PagerBackupPtr(sqlite3BtreePager(p->pSrc->pBt));
     assert( pp!=0 );
     while( *pp!=p ){
       pp = &(*pp)->pNext;
@@ -597,7 +603,7 @@ int sqlite3_backup_finish(sqlite3_backup *p){
   }
 
   /* If a transaction is still open on the Btree, roll it back. */
-  sqlite3BtreeRollback(p->pDest, SQLITE_OK, 0);
+  sqlite3BtreeRollback(p->pDest->pBt, SQLITE_OK, 0);
 
   /* Set the error code of the destination database handle. */
   rc = (p->rc==SQLITE_DONE) ? SQLITE_OK : p->rc;
@@ -607,7 +613,7 @@ int sqlite3_backup_finish(sqlite3_backup *p){
     /* Exit the mutexes and free the backup context structure. */
     sqlite3LeaveMutexAndCloseZombie(p->pDestDb);
   }
-  sqlite3BtreeLeave(p->pSrc);
+  sqlite3BtreeLeave(p->pSrc->pBt);
   if( p->pDestDb ){
     /* EVIDENCE-OF: R-64852-21591 The sqlite3_backup object is created by a
     ** call to sqlite3_backup_init() and is destroyed by a call to
@@ -665,7 +671,7 @@ static SQLITE_NOINLINE void backupUpdate(
 ){
   assert( p!=0 );
   do{
-    assert( sqlite3_mutex_held(p->pSrc->pBt->mutex) );
+    assert( sqlite3_mutex_held(p->pSrc->pBt->pBt->mutex) );
     if( !isFatalError(p->rc) && iPage<p->iNext ){
       /* The backup process p has already copied page iPage. But now it
       ** has been modified by a transaction on the source pager. Copy
@@ -701,7 +707,7 @@ void sqlite3BackupUpdate(sqlite3_backup *pBackup, Pgno iPage, const u8 *aData){
 void sqlite3BackupRestart(sqlite3_backup *pBackup){
   sqlite3_backup *p;                   /* Iterator variable */
   for(p=pBackup; p; p=p->pNext){
-    assert( sqlite3_mutex_held(p->pSrc->pBt->mutex) );
+    assert( sqlite3_mutex_held(p->pSrc->pBt->pBt->mutex) );
     p->iNext = 1;
   }
 }
@@ -719,6 +725,8 @@ int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
   int rc;
   sqlite3_file *pFd;              /* File descriptor for database pTo */
   sqlite3_backup b;
+  Db dbDest;
+  Db dbSrc;
   sqlite3BtreeEnter(pTo);
   sqlite3BtreeEnter(pFrom);
 
@@ -737,9 +745,13 @@ int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
   ** from this function, not directly by the user.
   */
   memset(&b, 0, sizeof(b));
+  memset(&dbDest, 0, sizeof(dbDest));
+  memset(&dbSrc, 0, sizeof(dbSrc));
+  dbDest.pBt = pTo;
+  dbSrc.pBt = pFrom;
   b.pSrcDb = pFrom->db;
-  b.pSrc = pFrom;
-  b.pDest = pTo;
+  b.pSrc = &dbSrc;
+  b.pDest = &dbDest;
   b.iNext = 1;
 
   /* 0x7FFFFFFF is the hard limit for the number of pages in a database
@@ -755,7 +767,7 @@ int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
   if( rc==SQLITE_OK ){
     pTo->pBt->btsFlags &= ~BTS_PAGESIZE_FIXED;
   }else{
-    sqlite3PagerClearCache(sqlite3BtreePager(b.pDest));
+    sqlite3PagerClearCache(sqlite3BtreePager(pTo));
   }
 
   assert( sqlite3BtreeTxnState(pTo)!=SQLITE_TXN_WRITE );

src/btree.c

@@ -15,6 +15,16 @@
 */
 #include "btreeInt.h"
 
+/*
+** Suppress false-positive compiler warnings from GCC.  Warnings are
+** re-enabled at the bottom of this source file.
+*/
+#if defined(__GNUC__) && __GNUC__>=11
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wstringop-overread"
+# pragma GCC diagnostic ignored "-Wstringop-overflow"
+#endif
+
 /*
 ** The header string that appears at the beginning of every
 ** SQLite database.
@@ -5290,6 +5300,14 @@ static int accessPayload(
               (eOp==0 ? PAGER_GET_READONLY : 0)
           );
           if( rc==SQLITE_OK ){
+            if( eOp!=0
+             && (sqlite3PagerPageRefcount(pDbPage)!=1
+                 || NEVER(((MemPage*)sqlite3PagerGetExtra(pDbPage))->isInit))
+             && sqlite3FaultSim(411)==SQLITE_OK
+            ){
+              sqlite3PagerUnref(pDbPage);
+              return SQLITE_CORRUPT_PAGE(pPage);
+            }
             aPayload = sqlite3PagerGetData(pDbPage);
             nextPage = get4byte(aPayload);
             rc = copyPayload(&aPayload[offset+4], pBuf, a, eOp, pDbPage);
@@ -5939,12 +5957,12 @@ moveto_table_finish:
 ** zero if the cell is less than or equal pIdxKey.  Return positive
 ** if unknown.
 **
-**    Return value negative:     Cell at pCur[idx] less than pIdxKey
+**    Return value negative:     Cell at pPage[idx] less than pIdxKey
 **
-**    Return value is zero:      Cell at pCur[idx] equals pIdxKey
+**    Return value is zero:      Cell at pPage[idx] equals pIdxKey
 **
 **    Return value positive:     Nothing is known about the relationship
-**                               of the cell at pCur[idx] and pIdxKey.
+**                               of the cell at pPage[idx] and pIdxKey.
 **
 ** This routine is part of an optimization.  It is always safe to return
 ** a positive value as that will cause the optimization to be skipped.
@@ -11566,3 +11584,10 @@ int sqlite3BtreeConnectionCount(Btree *p){
   return p->pBt->nRef;
 }
 #endif
+
+/* Re-enable GCC compiler warnings that were suppressed at the top
+** of this source file to prevent annoying false-positives.
+*/
+#if defined(__GNUC__) && __GNUC__>=11
+# pragma GCC diagnostic pop
+#endif

src/build.c

@@ -714,6 +714,19 @@ Expr *sqlite3ColumnExpr(Table *pTab, Column *pCol){
   return pTab->u.tab.pDfltList->a[pCol->iDflt-1].pExpr;
 }
 
+/*
+** Suppress false-positive warning message generated with -O3 in GCC
+** on the second call to sqlite3Strlen30() in the sqlite3ColumnSetColl()
+** function below.  See the forum thread beginning on 2026-05-10T01:11:22Z.
+**
+** See also the "pop" pragma to undo this warning suppression immediately
+** after the function.
+*/
+#if defined(__GNUC__) && __GNUC__>=11
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wstringop-overread"
+#endif
+
 /*
 ** Set the collating sequence name for a column.
 */
@@ -739,6 +752,11 @@ void sqlite3ColumnSetColl(
   }
 }
 
+/* Undo the false-positive warning suppression above. */
+#if defined(__GNUC__) && __GNUC__>=11
+# pragma GCC diagnostic pop
+#endif
+
 /*
 ** Return the collating sequence name for a column
 */

src/complete.c

@@ -332,10 +332,10 @@ sqlite3_int64 sqlite3_incomplete(const char *zSql){
   }
 incomplete_finish:
   if( state==1 ) nParen = 0;
-  return (((i64)nParen)<<32) |
-          ((i64)pending<<16) |
-          ((i64)statemap[state]<<8) |
-          (state!=1);
+  return (i64)((((u64)nParen)<<32) |
+               ((u64)pending<<16) |
+               ((u64)statemap[state]<<8) |
+               (state!=1));
 }
 int sqlite3_complete(const char *zSql){
   return sqlite3_incomplete(zSql)==0;

src/dbpage.c

@@ -259,12 +259,13 @@ static int dbpageFilter(
   pCsr->szPage = sqlite3BtreeGetPageSize(pBt);
   pCsr->mxPgno = sqlite3BtreeLastPage(pBt);
   if( idxNum & 1 ){
+    i64 iPg = sqlite3_value_int64(argv[idxNum>>1]);
     assert( argc>(idxNum>>1) );
-    pCsr->pgno = sqlite3_value_int(argv[idxNum>>1]);
-    if( pCsr->pgno<1 || pCsr->pgno>pCsr->mxPgno ){
+    if( iPg<1 || iPg>pCsr->mxPgno ){
       pCsr->pgno = 1;
       pCsr->mxPgno = 0;
     }else{
+      pCsr->pgno = (Pgno)iPg;
       pCsr->mxPgno = pCsr->pgno;
     }
   }else{
@@ -344,6 +345,7 @@ static int dbpageUpdate(
 ){
   DbpageTable *pTab = (DbpageTable *)pVtab;
   Pgno pgno;
+  sqlite3_int64 pgno64;
   DbPage *pDbPage = 0;
   int rc = SQLITE_OK;
   char *zErr = 0;
@@ -363,11 +365,11 @@ static int dbpageUpdate(
     goto update_fail;
   }
   if( sqlite3_value_type(argv[0])==SQLITE_NULL ){
-    pgno = (Pgno)sqlite3_value_int64(argv[2]);
+    pgno64 = sqlite3_value_int64(argv[2]);
     isInsert = 1;
   }else{
-    pgno = (Pgno)sqlite3_value_int64(argv[0]);
-    if( (Pgno)sqlite3_value_int(argv[1])!=pgno ){
+    pgno64 = (Pgno)sqlite3_value_int64(argv[0]);
+    if( sqlite3_value_int64(argv[1])!=pgno64 ){
       zErr = "cannot insert";
       goto update_fail;
     }
@@ -384,10 +386,11 @@ static int dbpageUpdate(
     }
   }
   pBt = pTab->db->aDb[iDb].pBt;
-  if( pgno<1 || NEVER(pBt==0) ){
+  if( pgno64<1 || pgno64>4294967294 || NEVER(pBt==0) ){
     zErr = "bad page number";
     goto update_fail;
   }
+  pgno = (Pgno)pgno64;
   szPage = sqlite3BtreeGetPageSize(pBt);
   if( sqlite3_value_type(argv[3])!=SQLITE_BLOB 
    || sqlite3_value_bytes(argv[3])!=szPage

src/delete.c

@@ -915,6 +915,7 @@ void sqlite3GenerateRowIndexDelete(
   v = pParse->pVdbe;
   pPk = HasRowid(pTab) ? 0 : sqlite3PrimaryKeyIndex(pTab);
   for(i=0, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
+    int p3 = 0;
     assert( iIdxCur+i!=iDataCur || pPk==pIdx );
     if( aRegIdx!=0 && aRegIdx[i]==0 ) continue;
     if( pIdx==pPk ) continue;
@@ -922,10 +923,12 @@ void sqlite3GenerateRowIndexDelete(
     VdbeModuleComment((v, "GenRowIdxDel for %s", pIdx->zName));
     r1 = sqlite3GenerateIndexKey(pParse, pIdx, iDataCur, 0, 1,
         &iPartIdxLabel, pPrior, r1);
-    sqlite3VdbeAddOp3(v, OP_IdxDelete, iIdxCur+i, r1,
-        pIdx->uniqNotNull ? pIdx->nKeyCol : pIdx->nColumn
-    );
+    if( pIdx->bHasExpr && aRegIdx ){
+      p3 = aRegIdx[i];
+    }
+    sqlite3VdbeAddOp3(v, OP_IdxDelete, iIdxCur+i, r1, p3);
     sqlite3VdbeChangeP4(v, -1, (const char*)pIdx, P4_INDEX);
+    sqlite3VdbeChangeP5(v, pIdx->uniqNotNull ? pIdx->nKeyCol : pIdx->nColumn);
     sqlite3ResolvePartIdxLabel(pParse, iPartIdxLabel);
     pPrior = pIdx;
   }

src/expr.c

@@ -331,7 +331,9 @@ CollSeq *sqlite3ExprNNCollSeq(Parse *pParse, const Expr *pExpr){
 int sqlite3ExprCollSeqMatch(Parse *pParse, const Expr *pE1, const Expr *pE2){
   CollSeq *pColl1 = sqlite3ExprNNCollSeq(pParse, pE1);
   CollSeq *pColl2 = sqlite3ExprNNCollSeq(pParse, pE2);
-  return sqlite3StrICmp(pColl1->zName, pColl2->zName)==0;
+  assert( (pColl1==pColl2) ==
+          (sqlite3_stricmp(pColl1->zName,pColl2->zName)==0) );
+  return pColl1==pColl2;
 }
 
 /*
@@ -2650,7 +2652,7 @@ int sqlite3ExprIsConstant(Parse *pParse, Expr *p){
 ** Walk an expression tree.  Return non-zero if
 **
 **   (1) the expression is constant, and
-**   (2) the expression does originate in the ON or USING clause
+**   (2) the expression does not originate in the ON or USING clause
 **       of a LEFT JOIN, and
 **   (3) the expression does not contain any EP_FixedCol TK_COLUMN
 **       operands created by the constant propagation optimization.
@@ -4685,26 +4687,37 @@ static int exprCodeInlineFunction(
 }
 
 /*
-** Expression Node callback for sqlite3ExprCanReturnSubtype().
+** Expression Node callback for sqlite3ExprCanReturnSubtype().  If
+** pExpr is able to return a subtype, set pWalker->eCode and abort
+** the search.  If pExpr can never return a subtype, prune search.
 **
-** Only a function call is able to return a subtype.  So if the node
-** is not a function call, return WRC_Prune immediately.
+** The only expressions that can return a subtype are:
 **
-** A function call is able to return a subtype if it has the
-** SQLITE_RESULT_SUBTYPE property.
+**    1.  A function
+**    2.  The no-op "+" operator
+**    3.  A CASE...END expression
+**    4.  A CAST() expression
+**    5.  A "expr COLLATE colseq" expression.
 **
-** Assume that every function is able to pass-through a subtype from
-** one of its argument (using sqlite3_result_value()).  Most functions
-** are not this way, but we don't have a mechanism to distinguish those
-** that are from those that are not, so assume they all work this way.
-** That means that if one of its arguments is another function and that
-** other function is able to return a subtype, then this function is
-** able to return a subtype.
+** For any other kind of expression, prune the search.
+**
+** For case 1, the expression can yield a subtype if the function has
+** the SQLITE_RESULT_SUBTYPE property.  Functions can also return
+** a subtype (via sqlite3_result_value()) if any of the arguments can
+** return a subtype.
+**
+** In all cases 1 through 5, the expression might also return a subtype
+** if any operand can return a subtype.
 */
 static int exprNodeCanReturnSubtype(Walker *pWalker, Expr *pExpr){
   int n;
   FuncDef *pDef;
   sqlite3 *db;
+  if( pExpr->op==TK_CASE || pExpr->op==TK_UPLUS 
+   || pExpr->op==TK_COLLATE || pExpr->op==TK_CAST 
+  ){
+    return WRC_Continue;
+  }
   if( pExpr->op!=TK_FUNCTION ){
     return WRC_Prune;
   }
@@ -4714,7 +4727,7 @@ static int exprNodeCanReturnSubtype(Walker *pWalker, Expr *pExpr){
   pDef = sqlite3FindFunction(db, pExpr->u.zToken, n, ENC(db), 0);
   if( NEVER(pDef==0) || (pDef->funcFlags & SQLITE_RESULT_SUBTYPE)!=0 ){
     pWalker->eCode = 1;
-    return WRC_Prune;
+    return WRC_Abort;
   }
   return WRC_Continue;
 }

src/func.c

@@ -130,13 +130,17 @@ static void lengthFunc(
     case SQLITE_TEXT: {
       const unsigned char *z = sqlite3_value_text(argv[0]);
       const unsigned char *z0;
-      unsigned char c;
       if( z==0 ) return;
       z0 = z;
-      while( (c = *z)!=0 ){
-        z++;
-        if( c>=0xc0 ){
-          while( (*z & 0xc0)==0x80 ){ z++; z0++; }
+      while( 1 /*exit-by-break*/ ){
+                      /*  vvvvvv----  See tag-20260418-01 */
+        if( (u8)(z[0]-1)<(0x80-1) ){
+          z++;
+        }else if( z[0]==0 ){
+          break;
+        }else{
+          z++;
+          while( (z[0]&0xc0)==0x80 ){ z++; z0++; }
         }
       }
       sqlite3_result_int(context, (int)(z-z0));
@@ -415,12 +419,25 @@ static void substrFunc(
   }
   assert( p1>=0 && p2>=0 );
   if( p0type!=SQLITE_BLOB ){
-    while( *z && p1 ){
-      SQLITE_SKIP_UTF8(z);
-      p1--;
+    for( ; p1>0; p1--){
+                    /*  vvvvvv----  See tag-20260418-01 */
+      if( (u8)(z[0]-1)<(0x80-1) ){
+        z++;
+      }else if( z[0]==0 ){
+        break;
+      }else{
+        do{ z++; }while( (z[0]&0xc0)==0x80 );
+      }
     }
-    for(z2=z; *z2 && p2; p2--){
-      SQLITE_SKIP_UTF8(z2);
+    for(z2=z; p2>0; p2--){
+                     /*  vvvvvv----  See tag-20260418-01 */
+      if( (u8)(z2[0]-1)<(0x80-1) ){
+        z2++;
+      }else if( z2[0]==0 ){
+        break;
+      }else{
+        do{ z2++; }while( (z2[0]&0xc0)==0x80 );
+      }
     }
     sqlite3_result_text64(context, (char*)z, z2-z, SQLITE_TRANSIENT,
                           SQLITE_UTF8);
@@ -1966,11 +1983,16 @@ static void sumInverse(sqlite3_context *context, int argc, sqlite3_value**argv){
     assert( p->cnt>0 );
     p->cnt--;
     if( !p->approx ){
-      if( sqlite3SubInt64(&p->iSum, sqlite3_value_int64(argv[0])) ){
-        p->ovrfl = 1;
-        p->approx = 1;
+      i64 x = p->iSum;
+      if( sqlite3SubInt64(&x, sqlite3_value_int64(argv[0]))==0 ){
+        p->iSum = x;
+        return;
       }
-    }else if( type==SQLITE_INTEGER ){
+      p->ovrfl = 1;
+      p->approx = 1;
+      kahanBabuskaNeumaierInit(p, p->iSum);
+    }
+    if( type==SQLITE_INTEGER ){
       i64 iVal = sqlite3_value_int64(argv[0]);
       if( iVal!=SMALLEST_INT64 ){
         kahanBabuskaNeumaierStepInt64(p, -iVal);
@@ -3106,7 +3128,7 @@ static void filestatFunc(
     assert( pPager!=0 );
     fd = sqlite3PagerFile(pPager);
     pStr = sqlite3_str_new(db);
-    if( pStr==0 ){
+    if( sqlite3_str_errcode(pStr) ){
       sqlite3_result_error_nomem(context);
     }else{
       sqlite3_str_append(pStr, "{\"db\":", 6);
@@ -3209,7 +3231,7 @@ static void parseuriFunc(
   flgs = (unsigned int)sqlite3_value_int(argv[1]);
   rc = sqlite3ParseUri(zVfs, zUri, &flgs, &pVfs, &zFile, &zErr);
   pResult = sqlite3_str_new(0);
-  if( pResult ){
+  if( !sqlite3_str_errcode(pResult) ){
     int i;
     sqlite3_str_appendf(pResult, "rc=%d", rc);
     sqlite3_str_appendf(pResult, ", flags=0x%x", flgs);

src/insert.c

@@ -2809,7 +2809,10 @@ void sqlite3CompleteInsertion(
          || pIdx->pNext==0
          || pIdx->pNext->onError==OE_Replace );
     if( aRegIdx[i]==0 ) continue;
-    if( pIdx->pPartIdxWhere ){
+    if( pIdx->pPartIdxWhere || (update_flags && pIdx->bHasExpr) ){
+      /* If this is a partial index, or an UPDATE of an index on an
+      ** expression, then the record register may be set to NULL to indicate
+      ** that no record should be inserted into this index. */
       sqlite3VdbeAddOp2(v, OP_IsNull, aRegIdx[i], sqlite3VdbeCurrentAddr(v)+2);
       VdbeCoverage(v);
     }
@@ -2984,6 +2987,44 @@ static int xferCompatibleIndex(Index *pDest, Index *pSrc){
   return 1;
 }
 
+/*
+** Examine an expression node and abort if it references the ROWID.
+** This is a Walker callback used by xferCompatibleCheck()
+*/
+static int xferCheckRowid(Walker *pWalk, Expr *pExpr){
+  if( pExpr->op==TK_COLUMN && pExpr->iColumn<0 ){
+    pWalk->eCode = 1;
+    return WRC_Abort;
+  }else{
+    return WRC_Continue;
+  }
+}
+
+/*
+** Analyze CHECK constraints on the source and destination tables and
+** return true if those CHECK constraints are compatible with the
+** xfer-optimization.
+**
+**    *  The pDest and pSrc tables must have identical CHECK constraints.
+**
+**    *  If the destination table, pDest, does not have an
+**       INTEGER PRIMARY KEY column, then no CHECK constraint may
+**       referenced the ROWID.  (See forum post 2026-05-11T13:15:57Z)
+*/
+static int xferCompatibleCheck(Table *pDest, Table *pSrc){
+  if( sqlite3ExprListCompare(pSrc->pCheck,pDest->pCheck,-1) ){
+    return 0;
+  }
+  if( pDest->iPKey<0 ){
+    Walker w;
+    memset(&w, 0, sizeof(w));
+    w.xExprCallback = xferCheckRowid;
+    sqlite3WalkExprList(&w,pDest->pCheck);
+    if( w.eCode ) return 0;
+  }
+  return 1;
+}
+
 /*
 ** Attempt the transfer optimization on INSERTs of the form
 **
@@ -3110,8 +3151,19 @@ static int xferOptimization(
   if( pDest->iPKey!=pSrc->iPKey ){
     return 0;   /* Both tables must have the same INTEGER PRIMARY KEY */
   }
-  if( (pDest->tabFlags & TF_Strict)!=0 && (pSrc->tabFlags & TF_Strict)==0 ){
-    return 0;   /* Cannot feed from a non-strict into a strict table */
+  if( (pDest->tabFlags & TF_Strict)!=0 ){
+    if( (pSrc->tabFlags & TF_Strict)==0 ){
+      return 0;  /* Cannot feed from a non-strict into a strict table */
+    }
+    for(i=0; i<pDest->nCol; i++){
+      unsigned eDestType = pDest->aCol[i].eCType;
+      unsigned eSrcType = pSrc->aCol[i].eCType;
+      if( eDestType==COLTYPE_ANY ) continue;
+      if( eDestType==eSrcType ) continue;
+      if( eDestType==COLTYPE_INT && eSrcType==COLTYPE_INTEGER ) continue;
+      if( eDestType==COLTYPE_INTEGER && eSrcType==COLTYPE_INT ) continue;
+      return 0; /* Incompatible types in source and destination */
+    }
   }
   for(i=0; i<pDest->nCol; i++){
     Column *pDestCol = &pDest->aCol[i];
@@ -3205,7 +3257,7 @@ static int xferOptimization(
 #ifndef SQLITE_OMIT_CHECK
   if( pDest->pCheck
    && (db->mDbFlags & DBFLAG_Vacuum)==0
-   && sqlite3ExprListCompare(pSrc->pCheck,pDest->pCheck,-1)
+   && !xferCompatibleCheck(pDest,pSrc)
   ){
     return 0;   /* Tables have different CHECK constraints.  Ticket #2252 */
   }
@@ -3226,6 +3278,18 @@ static int xferOptimization(
   if( (db->flags & SQLITE_CountRows)!=0 ){
     return 0;  /* xfer opt does not play well with PRAGMA count_changes */
   }
+#ifndef SQLITE_OMIT_AUTHORIZATION
+  if( db->xAuth ){
+    int iDb = sqlite3SchemaToIndex(db, pSrc->pSchema);
+    if( sqlite3AuthCheck(pParse, SQLITE_SELECT, 0, 0, 0) ) return 0;
+    for(i=0; i<pSrc->nCol; i++){
+      Column *pSrcCol = &pSrc->aCol[i];
+      if( sqlite3AuthReadCol(pParse, pSrc->zName, pSrcCol->zCnName, iDb) ){
+        return 0;
+      }
+    }
+  }
+#endif
 
   /* If we get this far, it means that the xfer optimization is at
   ** least a possibility, though it might only work if the destination

src/json.c

@@ -2340,7 +2340,7 @@ static u32 jsonTranslateBlobToText(
             break;
           case 0xe2:
             /* '\' followed by either U+2028 or U+2029 is ignored as
-            ** whitespace.  Not that in UTF8, U+2028 is 0xe2 0x80 0x29.
+            ** whitespace.  Note that in UTF8, U+2028 is 0xe2 0x80 0x29.
             ** U+2029 is the same except for the last byte */
             if( sz2<4
              || 0x80!=(u8)zIn[2]
@@ -4909,11 +4909,9 @@ static void jsonGroupInverse(
   UNUSED_PARAMETER(argc);
   UNUSED_PARAMETER(argv);
   pStr = (JsonString*)sqlite3_aggregate_context(ctx, 0);
-#ifdef NEVER
   /* pStr is always non-NULL since jsonArrayStep() or jsonObjectStep() will
   ** always have been called to initialize it */
   if( NEVER(!pStr) ) return;
-#endif
   z = pStr->zBuf;
   for(i=1; i<pStr->nUsed && ((c = z[i])!=',' || inStr || nNest); i++){
     if( c=='"' ){
@@ -4942,6 +4940,13 @@ static void jsonGroupInverse(
 ** json_group_obj(NAME,VALUE)
 **
 ** Return a JSON object composed of all names and values in the aggregate.
+**
+** Rows for which NAME is NULL do not result in a new entry.  However, we
+** do initially insert a "@" entry into the growing string for each null entry
+** and change the first character of the string to "@" to signal that the
+** string contains null entries.  The "@" markers are needed in order to
+** correctly process xInverse() requests.  The initial "@" is converted
+** back into "{" and the "@" null values are removed by jsonObjectCompute().
 */
 static void jsonObjectStep(
   sqlite3_context *ctx,
@@ -4959,7 +4964,7 @@ static void jsonObjectStep(
     if( pStr->zBuf==0 ){
       jsonStringInit(pStr, ctx);
       jsonAppendChar(pStr, '{');
-    }else if( pStr->nUsed>1 && z!=0 ){
+    }else if( pStr->nUsed>1 ){
       jsonAppendChar(pStr, ',');
     }
     pStr->pCtx = ctx;
@@ -4967,6 +4972,9 @@ static void jsonObjectStep(
       jsonAppendString(pStr, z, n);
       jsonAppendChar(pStr, ':');
       jsonAppendSqlValue(pStr, argv[1]);
+    }else{
+      pStr->zBuf[0] = '@';
+      jsonAppendRawNZ(pStr, "@", 1);
     }
   }
 }
@@ -4975,20 +4983,64 @@ static void jsonObjectCompute(sqlite3_context *ctx, int isFinal){
   int flags = SQLITE_PTR_TO_INT(sqlite3_user_data(ctx));
   pStr = (JsonString*)sqlite3_aggregate_context(ctx, 0);
   if( pStr ){
-    jsonAppendRawNZ(pStr, "}", 2);
-    jsonStringTrimOneChar(pStr);
+    JsonString *pOgStr = pStr;
+    JsonString tmpStr;
+    jsonAppendRawNZ(pOgStr, "}", 2);  /* Ensure it is zero-terminated */
+    jsonStringTrimOneChar(pOgStr);    /* Remove the zero terminator */
     pStr->pCtx = ctx;
     if( pStr->eErr ){
       jsonReturnString(pStr, 0, 0);
       return;
-    }else if( flags & JSON_BLOB ){
+    }
+    if( pStr->zBuf[0]!='{' ){
+      /* The string contains null entries that need to be removed */
+      u64 i, j;
+      int inStr = 0;
+      if( !isFinal ){
+        /* Work with a temporary copy of the string if this is not the
+        ** final result */
+        jsonStringInit(&tmpStr, ctx);
+        jsonAppendRawNZ(&tmpStr, pStr->zBuf, pStr->nUsed+1);
+        pStr = &tmpStr;
+        if( pStr->eErr ){
+          jsonReturnString(pStr, 0, 0);
+          return;
+        }
+        jsonStringTrimOneChar(pStr);  /* Remove zero terminator */
+      }
+      /* Fix up the string by changing the initial "@" flag back to
+      ** to "{" and removing all subsequence "@" entries, with their
+      ** associated comma delimeters. */
+      pStr->zBuf[0] = '{';
+      for(i=j=1; i<pStr->nUsed; i++){
+        char c = pStr->zBuf[i];
+        if( c=='"' ){
+          inStr = !inStr;
+          pStr->zBuf[j++] = '"';
+        }else if( c=='\\' ){
+          pStr->zBuf[j++] = '\\';
+          pStr->zBuf[j++] = pStr->zBuf[++i];
+        }else if( c=='@' && !inStr ){
+          assert( i+1<pStr->nUsed );
+          if( pStr->zBuf[i+1]==',' ){
+            i++;
+          }else if( pStr->zBuf[j-1]==',' ){
+            j--;
+          }
+        }else{
+          pStr->zBuf[j++] = c;
+        }
+      }
+      pStr->zBuf[j] = 0;  /* Restore zero terminator */
+      pStr->nUsed = j;    /* Truncate the string */
+    }
+    if( flags & JSON_BLOB ){
       jsonReturnStringAsBlob(pStr);
       if( isFinal ){
         if( !pStr->bStatic ) sqlite3RCStrUnref(pStr->zBuf);
       }else{
-        jsonStringTrimOneChar(pStr);
+        jsonStringTrimOneChar(pOgStr);
       }
-      return;
     }else if( isFinal ){
       sqlite3_result_text(ctx, pStr->zBuf, (int)pStr->nUsed,
                           pStr->bStatic ? SQLITE_TRANSIENT :
@@ -4996,8 +5048,9 @@ static void jsonObjectCompute(sqlite3_context *ctx, int isFinal){
       pStr->bStatic = 1;
     }else{
       sqlite3_result_text(ctx, pStr->zBuf, (int)pStr->nUsed, SQLITE_TRANSIENT);
-      jsonStringTrimOneChar(pStr);
+      jsonStringTrimOneChar(pOgStr);
     }
+    if( pStr!=pOgStr ) jsonStringReset(pStr);
   }else if( flags & JSON_BLOB ){
     static const unsigned char emptyObject = 0x0c;
     sqlite3_result_blob(ctx, &emptyObject, 1, SQLITE_STATIC); 

src/loadext.c

@@ -528,11 +528,12 @@ static const sqlite3_api_routines sqlite3Apis = {
   sqlite3_str_free,
 #ifdef SQLITE_ENABLE_CARRAY
   sqlite3_carray_bind,
-  sqlite3_carray_bind_v2
+  sqlite3_carray_bind_v2,
 #else
   0,
-  0
+  0,
 #endif
+  sqlite3_incomplete
 };
 
 /* True if x is the directory separator character

src/main.c

@@ -1136,7 +1136,8 @@ void sqlite3_set_last_insert_rowid(sqlite3 *db, sqlite3_int64 iRowid){
 }
 
 /*
-** Return the number of changes in the most recent call to sqlite3_exec().
+** Return the number of changes in the most recently executed DML
+** statement.
 */
 sqlite3_int64 sqlite3_changes64(sqlite3 *db){
 #ifdef SQLITE_ENABLE_API_ARMOR

src/memdb.c

@@ -876,10 +876,10 @@ int sqlite3_deserialize(
   if( rc ) goto end_deserialize;
   db->init.iDb = (u8)iDb;
   db->init.reopenMemdb = 1;
-  rc = sqlite3_step(pStmt);
+  sqlite3_step(pStmt);
   db->init.reopenMemdb = 0;
-  if( rc!=SQLITE_DONE ){
-    rc = SQLITE_ERROR;
+  rc = sqlite3_finalize(pStmt);
+  if( rc!=SQLITE_OK ){
     goto end_deserialize;
   }
   p = memdbFromDbSchema(db, zSchema);
@@ -900,7 +900,6 @@ int sqlite3_deserialize(
   }
 
 end_deserialize:
-  sqlite3_finalize(pStmt);
   if( pData && (mFlags & SQLITE_DESERIALIZE_FREEONCLOSE)!=0 ){
     sqlite3_free(pData);
   }

src/mutex_unix.c

@@ -35,8 +35,15 @@
 # define SQLITE_MUTEX_NREF 0
 #endif
 
+#if GCC_VERSION>0
+# define ALIGN128 __attribute__((aligned(128)))
+#else
+# define ALIGN128
+#endif
+
 /*
-** Each recursive mutex is an instance of the following structure.
+** Each SQLite mutex is an instance of the following structure.
+**
 */
 struct sqlite3_mutex {
   pthread_mutex_t mutex;     /* Mutex controlling the lock */
@@ -151,19 +158,31 @@ static int pthreadMutexEnd(void){ return SQLITE_OK; }
 ** the same type number.
 */
 static sqlite3_mutex *pthreadMutexAlloc(int iType){
-  static sqlite3_mutex staticMutexes[] = {
-    SQLITE3_MUTEX_INITIALIZER(2),
-    SQLITE3_MUTEX_INITIALIZER(3),
-    SQLITE3_MUTEX_INITIALIZER(4),
-    SQLITE3_MUTEX_INITIALIZER(5),
-    SQLITE3_MUTEX_INITIALIZER(6),
-    SQLITE3_MUTEX_INITIALIZER(7),
-    SQLITE3_MUTEX_INITIALIZER(8),
-    SQLITE3_MUTEX_INITIALIZER(9),
-    SQLITE3_MUTEX_INITIALIZER(10),
-    SQLITE3_MUTEX_INITIALIZER(11),
-    SQLITE3_MUTEX_INITIALIZER(12),
-    SQLITE3_MUTEX_INITIALIZER(13)
+  /* Static mutexes - those with IDs of 2 or more...
+  **
+  ** The ALIGN128 macro attempts to force 128-byte alignment on mutexes,
+  ** so that adjacent mutex objects are always on different cache lines
+  ** in the CPU.  This is CPU-dependent, of course, but 128-byte alignment
+  ** seems to work well for all contemporary processors.  Experiments show
+  ** that 64 works just as well most of the time, but the internet says
+  ** that 128-byte alignment works better.
+  */
+  static ALIGN128 union staticMutex {
+     sqlite3_mutex m;
+     char aSpacer[128];
+  } aMutex[] = {
+    { .m = SQLITE3_MUTEX_INITIALIZER(2) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(3) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(4) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(5) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(6) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(7) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(8) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(9) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(10) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(11) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(12) },
+    { .m = SQLITE3_MUTEX_INITIALIZER(13) },
   };
   sqlite3_mutex *p;
   switch( iType ){
@@ -200,12 +219,12 @@ static sqlite3_mutex *pthreadMutexAlloc(int iType){
     }
     default: {
 #ifdef SQLITE_ENABLE_API_ARMOR
-      if( iType-2<0 || iType-2>=ArraySize(staticMutexes) ){
+      if( iType-2<0 || iType-2>=ArraySize(aMutex) ){
         (void)SQLITE_MISUSE_BKPT;
         return 0;
       }
 #endif
-      p = &staticMutexes[iType-2];
+      p = &aMutex[iType-2].m;
       break;
     }
   }

src/mutex_w32.c

@@ -31,11 +31,29 @@
 */
 #ifdef SQLITE_MUTEX_W32
 
+#if MSVC_VERSION>0
+# define ALIGN128 __declspec(align(128))
+#else
+# define ALIGN128
+#endif
+
+#pragma warning(push)
+#pragma warning(disable: 4324)
 /*
-** Each recursive mutex is an instance of the following structure.
+** Each SQLite mutex is an instance of the following structure.
+**
+** The ALIGN128 macro attempts to force 128-byte alignment on mutexes,
+** so that adjacent mutex objects are always on different cache lines
+** in the CPU.  This is CPU-dependent, of course, but 128-byte alignment
+** seems to work well for all contemporary processors.  Experiments show
+** that 64 works just as well most of the time, but the internet says
+** that 128-byte alignment works better.
 */
-struct sqlite3_mutex {
-  CRITICAL_SECTION mutex;    /* Mutex controlling the lock */
+struct sqlite3_mutex { 
+  union {
+    CRITICAL_SECTION cs;     /* The CRITICAL_SECTION mutex.  id==1 */
+    SRWLOCK srwl;            /* The Slim reader/writer lock.  id!=1 */
+  } u;
   int id;                    /* Mutex type */
 #ifdef SQLITE_DEBUG
   volatile int nRef;         /* Number of entrances */
@@ -43,20 +61,7 @@ struct sqlite3_mutex {
   volatile LONG trace;       /* True to trace changes */
 #endif
 };
-
-/*
-** These are the initializer values used when declaring a "static" mutex
-** on Win32.  It should be noted that all mutexes require initialization
-** on the Win32 platform.
-*/
-#define SQLITE_W32_MUTEX_INITIALIZER { 0 }
-
-#ifdef SQLITE_DEBUG
-#define SQLITE3_MUTEX_INITIALIZER(id) { SQLITE_W32_MUTEX_INITIALIZER, id, \
-                                    0L, (DWORD)0, 0 }
-#else
-#define SQLITE3_MUTEX_INITIALIZER(id) { SQLITE_W32_MUTEX_INITIALIZER, id }
-#endif
+#pragma warning(pop)
 
 #ifdef SQLITE_DEBUG
 /*
@@ -67,13 +72,8 @@ static int winMutexHeld(sqlite3_mutex *p){
   return p->nRef!=0 && p->owner==GetCurrentThreadId();
 }
 
-static int winMutexNotheld2(sqlite3_mutex *p, DWORD tid){
-  return p->nRef==0 || p->owner!=tid;
-}
-
 static int winMutexNotheld(sqlite3_mutex *p){
-  DWORD tid = GetCurrentThreadId();
-  return winMutexNotheld2(p, tid);
+  return p->nRef==0 || p->owner!=GetCurrentThreadId();
 }
 #endif
 
@@ -95,41 +95,42 @@ void sqlite3MemoryBarrier(void){
 }
 
 /*
-** Initialize and deinitialize the mutex subsystem.
+** Static mutexes.
+**
+** The ALIGN128 macro on the static mutex array forces 128-byte alignment
+** on the mutexes so that adjacent mutex objects are always on different
+** cache lines in the CPU.  This is CPU-dependent, of course, but 128-byte
+** alignment seems to work well for all contemporary processors.
+** Experiments show that 64 works just as well most of the time, but
+** the internet says that 128-byte alignment works better.
 */
-static sqlite3_mutex winMutex_staticMutexes[] = {
-  SQLITE3_MUTEX_INITIALIZER(2),
-  SQLITE3_MUTEX_INITIALIZER(3),
-  SQLITE3_MUTEX_INITIALIZER(4),
-  SQLITE3_MUTEX_INITIALIZER(5),
-  SQLITE3_MUTEX_INITIALIZER(6),
-  SQLITE3_MUTEX_INITIALIZER(7),
-  SQLITE3_MUTEX_INITIALIZER(8),
-  SQLITE3_MUTEX_INITIALIZER(9),
-  SQLITE3_MUTEX_INITIALIZER(10),
-  SQLITE3_MUTEX_INITIALIZER(11),
-  SQLITE3_MUTEX_INITIALIZER(12),
-  SQLITE3_MUTEX_INITIALIZER(13)
-};
-
+static ALIGN128 union staticMutexes {
+  sqlite3_mutex m;
+  char spacer[128];
+} aWindowsMutex[12];
 static int winMutex_isInit = 0;
-static int winMutex_isNt = -1; /* <0 means "need to query" */
 
 /* As the winMutexInit() and winMutexEnd() functions are called as part
 ** of the sqlite3_initialize() and sqlite3_shutdown() processing, the
 ** "interlocked" magic used here is probably not strictly necessary.
 */
-static LONG SQLITE_WIN32_VOLATILE winMutex_lock = 0;
+static LONG volatile winMutex_lock = 0;
 
-int sqlite3_win32_is_nt(void); /* os_win.c */
 void sqlite3_win32_sleep(DWORD milliseconds); /* os_win.c */
 
 static int winMutexInit(void){
   /* The first to increment to 1 does actual initialization */
   if( InterlockedCompareExchange(&winMutex_lock, 1, 0)==0 ){
     int i;
-    for(i=0; i<ArraySize(winMutex_staticMutexes); i++){
-      InitializeCriticalSection(&winMutex_staticMutexes[i].mutex);
+    for(i=0; i<ArraySize(aWindowsMutex); i++){
+      sqlite3_mutex *p = &aWindowsMutex[i].m;
+      p->id = i+2;
+      InitializeSRWLock(&p->u.srwl);
+#ifdef SQLITE_DEBUG
+      p->nRef = 0;
+      p->owner = 0;
+      p->trace = 0;
+#endif
     }
     winMutex_isInit = 1;
   }else{
@@ -147,10 +148,6 @@ static int winMutexEnd(void){
   ** (which should be the last to shutdown.) */
   if( InterlockedCompareExchange(&winMutex_lock, 0, 1)==1 ){
     if( winMutex_isInit==1 ){
-      int i;
-      for(i=0; i<ArraySize(winMutex_staticMutexes); i++){
-        DeleteCriticalSection(&winMutex_staticMutexes[i].mutex);
-      }
       winMutex_isInit = 0;
     }
   }
@@ -219,18 +216,22 @@ static sqlite3_mutex *winMutexAlloc(int iType){
         p->trace = 1;
 #endif
 #endif
-        InitializeCriticalSection(&p->mutex);
+        if( iType==SQLITE_MUTEX_RECURSIVE ){
+          InitializeCriticalSection(&p->u.cs);
+        }else{
+          InitializeSRWLock(&p->u.srwl);
+        }
       }
       break;
     }
     default: {
 #ifdef SQLITE_ENABLE_API_ARMOR
-      if( iType-2<0 || iType-2>=ArraySize(winMutex_staticMutexes) ){
+      if( iType-2<0 || iType-2>=ArraySize(aWindowsMutex) ){
         (void)SQLITE_MISUSE_BKPT;
         return 0;
       }
 #endif
-      p = &winMutex_staticMutexes[iType-2];
+      p = &aWindowsMutex[iType-2].m;
 #ifdef SQLITE_DEBUG
 #ifdef SQLITE_WIN32_MUTEX_TRACE_STATIC
       InterlockedCompareExchange(&p->trace, 1, 0);
@@ -252,8 +253,10 @@ static sqlite3_mutex *winMutexAlloc(int iType){
 static void winMutexFree(sqlite3_mutex *p){
   assert( p );
   assert( p->nRef==0 && p->owner==0 );
-  if( p->id==SQLITE_MUTEX_FAST || p->id==SQLITE_MUTEX_RECURSIVE ){
-    DeleteCriticalSection(&p->mutex);
+  if( p->id==SQLITE_MUTEX_FAST ){
+    sqlite3_free(p);
+  }else if( p->id==SQLITE_MUTEX_RECURSIVE ){
+    DeleteCriticalSection(&p->u.cs);
     sqlite3_free(p);
   }else{
 #ifdef SQLITE_ENABLE_API_ARMOR
@@ -274,67 +277,56 @@ static void winMutexFree(sqlite3_mutex *p){
 ** more than once, the behavior is undefined.
 */
 static void winMutexEnter(sqlite3_mutex *p){
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-  DWORD tid = GetCurrentThreadId();
-#endif
+  assert( p );
 #ifdef SQLITE_DEBUG
-  assert( p );
-  assert( p->id==SQLITE_MUTEX_RECURSIVE || winMutexNotheld2(p, tid) );
-#else
-  assert( p );
+  assert( p->id==SQLITE_MUTEX_RECURSIVE || winMutexNotheld(p) );
 #endif
   assert( winMutex_isInit==1 );
-  EnterCriticalSection(&p->mutex);
+  if( p->id==SQLITE_MUTEX_RECURSIVE ){
+    EnterCriticalSection(&p->u.cs);
+  }else{
+    AcquireSRWLockExclusive(&p->u.srwl);
+  }
 #ifdef SQLITE_DEBUG
   assert( p->nRef>0 || p->owner==0 );
-  p->owner = tid;
+  p->owner = GetCurrentThreadId();
   p->nRef++;
   if( p->trace ){
     OSTRACE(("ENTER-MUTEX tid=%lu, mutex(%d)=%p (%d), nRef=%d\n",
-             tid, p->id, p, p->trace, p->nRef));
+             GetCurrentThreadId(), p->id, p, p->trace, p->nRef));
   }
 #endif
 }
 
 static int winMutexTry(sqlite3_mutex *p){
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-  DWORD tid = GetCurrentThreadId();
-#endif
   int rc = SQLITE_BUSY;
   assert( p );
-  assert( p->id==SQLITE_MUTEX_RECURSIVE || winMutexNotheld2(p, tid) );
+  assert( p->id==SQLITE_MUTEX_RECURSIVE || winMutexNotheld(p) );
   /*
-  ** The sqlite3_mutex_try() routine is very rarely used, and when it
-  ** is used it is merely an optimization.  So it is OK for it to always
+  ** The sqlite3_mutex_try() routine is seldom used, and when it is
+  ** used it is merely an optimization.  So it is OK for it to always
   ** fail.
-  **
-  ** The TryEnterCriticalSection() interface is only available on WinNT.
-  ** And some windows compilers complain if you try to use it without
-  ** first doing some #defines that prevent SQLite from building on Win98.
-  ** For that reason, we will omit this optimization for now.  See
-  ** ticket #2685.
   */
-#if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x0400
-  assert( winMutex_isInit==1 );
-  assert( winMutex_isNt>=-1 && winMutex_isNt<=1 );
-  if( winMutex_isNt<0 ){
-    winMutex_isNt = sqlite3_win32_is_nt();
+  if( p->id==SQLITE_MUTEX_RECURSIVE ){
+    rc = TryEnterCriticalSection(&p->u.cs);
+  }else{
+    rc = TryAcquireSRWLockExclusive(&p->u.srwl);
   }
-  assert( winMutex_isNt==0 || winMutex_isNt==1 );
-  if( winMutex_isNt && TryEnterCriticalSection(&p->mutex) ){
+  if( rc ){
 #ifdef SQLITE_DEBUG
-    p->owner = tid;
+    p->owner = GetCurrentThreadId();
     p->nRef++;
 #endif
     rc = SQLITE_OK;
+  }else{
+    rc = SQLITE_BUSY;
   }
-#else
-  UNUSED_PARAMETER(p);
-#endif
 #ifdef SQLITE_DEBUG
   if( p->trace ){
-    OSTRACE(("TRY-MUTEX tid=%lu, mutex(%d)=%p (%d), owner=%lu, nRef=%d, rc=%s\n",
-             tid, p->id, p, p->trace, p->owner, p->nRef, sqlite3ErrName(rc)));
+    OSTRACE((
+       "TRY-MUTEX tid=%lu, mutex(%d)=%p (%d), owner=%lu, nRef=%d, rc=%s\n",
+       GetCurrentThreadId(), p->id, p, p->trace, p->owner, p->nRef,
+       sqlite3ErrName(rc)));
   }
 #endif
   return rc;
@@ -347,23 +339,24 @@ static int winMutexTry(sqlite3_mutex *p){
 ** is not currently allocated.  SQLite will never do either.
 */
 static void winMutexLeave(sqlite3_mutex *p){
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-  DWORD tid = GetCurrentThreadId();
-#endif
   assert( p );
 #ifdef SQLITE_DEBUG
   assert( p->nRef>0 );
-  assert( p->owner==tid );
+  assert( p->owner==GetCurrentThreadId() );
   p->nRef--;
   if( p->nRef==0 ) p->owner = 0;
   assert( p->nRef==0 || p->id==SQLITE_MUTEX_RECURSIVE );
 #endif
   assert( winMutex_isInit==1 );
-  LeaveCriticalSection(&p->mutex);
+  if( p->id==SQLITE_MUTEX_RECURSIVE ){
+    LeaveCriticalSection(&p->u.cs);
+  }else{
+    ReleaseSRWLockExclusive(&p->u.srwl);
+  }
 #ifdef SQLITE_DEBUG
   if( p->trace ){
     OSTRACE(("LEAVE-MUTEX tid=%lu, mutex(%d)=%p (%d), nRef=%d\n",
-             tid, p->id, p, p->trace, p->nRef));
+             GetCurrentThreadId(), p->id, p, p->trace, p->nRef));
   }
 #endif
 }

src/os_win.h

@@ -27,53 +27,11 @@
 # include <errno.h> /* amalgamator: dontcache */
 #endif
 
-/*
-** Determine if we are dealing with Windows NT.
-**
-** We ought to be able to determine if we are compiling for Windows 9x or
-** Windows NT using the _WIN32_WINNT macro as follows:
-**
-** #if defined(_WIN32_WINNT)
-** # define SQLITE_OS_WINNT 1
-** #else
-** # define SQLITE_OS_WINNT 0
-** #endif
-**
-** However, Visual Studio 2005 does not set _WIN32_WINNT by default, as
-** it ought to, so the above test does not work.  We'll just assume that
-** everything is Windows NT unless the programmer explicitly says otherwise
-** by setting SQLITE_OS_WINNT to 0.
-*/
-#if SQLITE_OS_WIN && !defined(SQLITE_OS_WINNT)
-# define SQLITE_OS_WINNT 1
-#endif
-
-/*
-** Determine if we are dealing with Windows CE - which has a much reduced
-** API.
-*/
-#if defined(_WIN32_WCE)
-# define SQLITE_OS_WINCE 1
-#else
-# define SQLITE_OS_WINCE 0
-#endif
-
-/*
-** For WinCE, some API function parameters do not appear to be declared as
-** volatile.
-*/
-#if SQLITE_OS_WINCE
-# define SQLITE_WIN32_VOLATILE
-#else
-# define SQLITE_WIN32_VOLATILE volatile
-#endif
-
 /*
 ** For some Windows sub-platforms, the _beginthreadex() / _endthreadex()
 ** functions are not available (e.g. those not using MSVC, Cygwin, etc).
 */
-#if SQLITE_OS_WIN && !SQLITE_OS_WINCE && \
-    SQLITE_THREADSAFE>0 && !defined(__CYGWIN__)
+#if SQLITE_OS_WIN && SQLITE_THREADSAFE>0 && !defined(__CYGWIN__)
 # define SQLITE_OS_WIN_THREADS 1
 #else
 # define SQLITE_OS_WIN_THREADS 0

src/pager.c

@@ -1993,7 +1993,7 @@ static int pagerFlushOnCommit(Pager *pPager, int bCommit){
 ** database transaction.
 **
 ** This routine is never called in PAGER_ERROR state. If it is called
-** in PAGER_NONE or PAGER_SHARED state and the lock held is less
+** in PAGER_OPEN or PAGER_READER state and the lock held is less
 ** exclusive than a RESERVED lock, it is a no-op.
 **
 ** Otherwise, any active savepoints are released.
@@ -3754,7 +3754,7 @@ void sqlite3PagerSetBusyHandler(
 **
 ** then the pager object page size is set to *pPageSize.
 **
-** If the page size is changed, then this function uses sqlite3PagerMalloc()
+** If the page size is changed, then this function uses sqlite3PageMalloc()
 ** to obtain a new Pager.pTmpSpace buffer. If this allocation attempt
 ** fails, SQLITE_NOMEM is returned and the page size remains unchanged.
 ** In all other cases, SQLITE_OK is returned.
@@ -5101,8 +5101,8 @@ sqlite3_file *sqlite3_database_file_object(const char *zName){
 
 
 /*
-** This function is called after transitioning from PAGER_UNLOCK to
-** PAGER_SHARED state. It tests if there is a hot journal present in
+** This function is called while transitioning from PAGER_OPEN to a
+** higher state. It tests if there is a hot journal present in
 ** the file-system for the given pager. A hot journal is one that
 ** needs to be played back. According to this function, a hot-journal
 ** file exists if the following criteria are met:

src/parse.y

@@ -1334,9 +1334,11 @@ expr(A) ::= LP nexprlist(X) COMMA expr(Y) RP. {
   ExprList *pList = sqlite3ExprListAppend(pParse, X, Y);
   A = sqlite3PExpr(pParse, TK_VECTOR, 0, 0);
   if( A ){
+    int i;
     A->x.pList = pList;
-    if( ALWAYS(pList->nExpr) ){
-      A->flags |= pList->a[0].pExpr->flags & EP_Propagate;
+    for(i=0; i<pList->nExpr; i++){
+      assert( pList->a[i].pExpr!=0 );
+      A->flags |= pList->a[i].pExpr->flags & EP_Propagate;
     }
   }else{
     sqlite3ExprListDelete(pParse->db, pList);
@@ -1476,6 +1478,7 @@ expr(A) ::= expr(A) between_op(N) expr(X) AND expr(Y). [BETWEEN] {
   A = sqlite3PExpr(pParse, TK_BETWEEN, A, 0);
   if( A ){
     A->x.pList = pList;
+    sqlite3ExprSetHeightAndFlags(pParse, A);
   }else{
     sqlite3ExprListDelete(pParse->db, pList);
   } 
@@ -1909,11 +1912,11 @@ cmd ::= ALTER TABLE fullname(X) ALTER kwcolumn_opt nm(Y) DROP NOT NULL. {
 cmd ::= ALTER TABLE fullname(X) ALTER kwcolumn_opt nm(Y) SET NOT(Z) NULL onconf. {
   sqlite3AlterSetNotNull(pParse, X, &Y, &Z);
 }
-cmd ::= ALTER TABLE fullname(X) ADD CONSTRAINT(Y) nm(Z) CHECK LP(A) expr RP(B) onconf. {
-  sqlite3AlterAddConstraint(pParse, X, &Y, &Z, A.z+1, (B.z-A.z-1));
+cmd ::= ALTER TABLE fullname(X) ADD CONSTRAINT(Y) nm(Z) CHECK LP(A) expr(E) RP(B) onconf. {
+  sqlite3AlterAddConstraint(pParse, X, &Y, &Z, A.z+1, (B.z-A.z-1), E);
 }
-cmd ::= ALTER TABLE fullname(X) ADD CHECK(Y) LP(A) expr RP(B) onconf. {
-  sqlite3AlterAddConstraint(pParse, X, &Y, 0, A.z+1, (B.z-A.z-1));
+cmd ::= ALTER TABLE fullname(X) ADD CHECK(Y) LP(A) expr(E) RP(B) onconf. {
+  sqlite3AlterAddConstraint(pParse, X, &Y, 0, A.z+1, (B.z-A.z-1), E);
 }
 
 kwcolumn_opt ::= .

src/prepare.c

@@ -216,7 +216,13 @@ int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg, u32 mFlags){
   assert( sqlite3_mutex_held(db->mutex) );
   assert( iDb==1 || sqlite3BtreeHoldsMutex(db->aDb[iDb].pBt) );
 
-  db->init.busy = 1;
+  db->init.busy = 1 + ((mFlags & INITFLAG_AlterAdd)!=0);
+  /* ^--- Any non-zero value for init.busy means that we are scanning
+  ** the sqlite_schema table to build the internal schema representation,
+  ** rather than running actual CREATE statements.  init.busy==2 has the
+  ** additional meaning that the scan is happening as part of
+  ** ALTER TABLE ADD COLUMN, which is stricter in its enforcement of
+  ** function name resolution. */
 
   /* Construct the in-memory representation schema tables (sqlite_schema or
   ** sqlite_temp_schema) by invoking the parser directly.  The appropriate

src/printf.c

@@ -34,8 +34,10 @@
 #define etESCAPE_w    14 /* %w -> Strings with '\"' doubled */
 #define etORDINAL     15 /* %r -> 1st, 2nd, 3rd, 4th, etc.  English only */
 #define etDECIMAL     16 /* %d or %u, but not %x, %o */
+#define etESCAPE_j    17 /* %j -> JSON string literal w/o "..." */
+#define etESCAPE_J    18 /* %J -> JSON string literal with "..." */
 
-#define etINVALID     17 /* Any unrecognized conversion type */
+#define etINVALID     19 /* Any unrecognized conversion type */
 
 
 /*
@@ -65,20 +67,20 @@ typedef struct et_info {   /* Information about each format field */
 
 /*
 ** The table is searched by hash.  In the case of %C where C is the character
-** and that character has ASCII value j, then the hash is j%23.
+** and that character has ASCII value j, then the hash is j%25.
 **
 ** The order of the entries in fmtinfo[] and the hash chain was entered
 ** manually, but based on the output of the following TCL script:
 */
 #if 0  /*****  Beginning of script ******/
-foreach c {d s g z q Q w c o u x X f e E G i n % p T S r} {
+foreach c {d s g z q Q w c o u x X f e E G i n % p T S r J j} {
   scan $c %c x
   set n($c) $x
 }
 set mx [llength [array names n]]
 puts "count: $mx"
 
-set mx 27
+set mx 25
 puts "*********** mx=$mx ************"
 for {set r 0} {$r<$mx} {incr r} {
   puts -nonewline [format %2d: $r]
@@ -90,31 +92,34 @@ for {set r 0} {$r<$mx} {incr r} {
 #endif /***** End of script ********/
 
 static const char aDigits[] = "0123456789ABCDEF0123456789abcdef";
+static const char aHex[]    = "0123456789abcdef";
 static const char aPrefix[] = "-x0\000X0";
-static const et_info fmtinfo[23] = {
-  /*  0 */  {  's',  0, 4, etSTRING,     0,  0,  1 },
-  /*  1 */  {  'E',  0, 1, etEXP,        14, 0,  0 },  /* Hash: 0 */
-  /*  2 */  {  'u', 10, 0, etDECIMAL,    0,  0,  3 },
-  /*  3 */  {  'G',  0, 1, etGENERIC,    14, 0,  0 },  /* Hash: 2 */
-  /*  4 */  {  'w',  0, 4, etESCAPE_w,   0,  0,  0 },
-  /*  5 */  {  'x', 16, 0, etRADIX,      16, 1,  0 },
-  /*  6 */  {  'c',  0, 0, etCHARX,      0,  0,  0 },  /* Hash: 7 */
-  /*  7 */  {  'z',  0, 4, etDYNSTRING,  0,  0,  6 },
-  /*  8 */  {  'd', 10, 1, etDECIMAL,    0,  0,  0 },
-  /*  9 */  {  'e',  0, 1, etEXP,        30, 0,  0 },
-  /* 10 */  {  'f',  0, 1, etFLOAT,      0,  0,  0 },
-  /* 11 */  {  'g',  0, 1, etGENERIC,    30, 0,  0 },
-  /* 12 */  {  'Q',  0, 4, etESCAPE_Q,   0,  0,  0 },
-  /* 13 */  {  'i', 10, 1, etDECIMAL,    0,  0,  0 },
-  /* 14 */  {  '%',  0, 0, etPERCENT,    0,  0, 16 },
-  /* 15 */  {  'T',  0, 0, etTOKEN,      0,  0,  0 },
-  /* 16 */  {  'S',  0, 0, etSRCITEM,    0,  0,  0 },  /* Hash: 14 */
-  /* 17 */  {  'X', 16, 0, etRADIX,      0,  4,  0 },  /* Hash: 19 */
-  /* 18 */  {  'n',  0, 0, etSIZE,       0,  0,  0 },
-  /* 19 */  {  'o',  8, 0, etRADIX,      0,  2, 17 },
-  /* 20 */  {  'p', 16, 0, etPOINTER,    0,  1,  0 },
-  /* 21 */  {  'q',  0, 4, etESCAPE_q,   0,  0,  0 },
-  /* 22 */  {  'r', 10, 1, etORDINAL,    0,  0,  0 }
+static const et_info fmtinfo[25] = {
+  /*  0 */  {  'd', 10, 1, etDECIMAL,    0,  0,  0 },
+  /*  1 */  {  'e',  0, 1, etEXP,        30, 0,  0 },
+  /*  2 */  {  'f',  0, 1, etFLOAT,      0,  0,  0 },
+  /*  3 */  {  'g',  0, 1, etGENERIC,    30, 0,  0 },
+  /*  4 */  {  'j',  0, 0, etESCAPE_j,   0,  0,  0 },  /* Hash: 6 */
+  /*  5 */  {  'i', 10, 1, etDECIMAL,    0,  0,  0 },
+  /*  6 */  {  'Q',  0, 4, etESCAPE_Q,   0,  0,  4 },
+  /*  7 */  {  'p', 16, 0, etPOINTER,    0,  1,  0 },  /* Hash: 12 */
+  /*  8 */  {  'S',  0, 0, etSRCITEM,    0,  0,  0 },
+  /*  9 */  {  'T',  0, 0, etTOKEN,      0,  0,  0 },
+  /* 10 */  {  'n',  0, 0, etSIZE,       0,  0,  0 },
+  /* 11 */  {  'o',  8, 0, etRADIX,      0,  2,  0 },
+  /* 12 */  {  '%',  0, 0, etPERCENT,    0,  0,  7 },
+  /* 13 */  {  'q',  0, 4, etESCAPE_q,   0,  0, 16 },
+  /* 14 */  {  'r', 10, 1, etORDINAL,    0,  0,  0 },
+  /* 15 */  {  's',  0, 4, etSTRING,     0,  0,  0 },
+  /* 16 */  {  'X', 16, 0, etRADIX,      0,  4,  0 },  /* Hash: 13 */
+  /* 17 */  {  'u', 10, 0, etDECIMAL,    0,  0,  0 },
+  /* 18 */  {  'w',  0, 4, etESCAPE_w,   0,  0,  0 },  /* Hash: 19 */
+  /* 19 */  {  'E',  0, 1, etEXP,        14, 0, 18 },
+  /* 20 */  {  'x', 16, 0, etRADIX,      16, 1,  0 },
+  /* 21 */  {  'G',  0, 1, etGENERIC,    14, 0,  0 },
+  /* 22 */  {  'z',  0, 4, etDYNSTRING,  0,  0,  0 },
+  /* 23 */  {  'J',  0, 0, etESCAPE_J,   0,  0,  0 },  /* Hash: 24 */
+  /* 24 */  {  'c',  0, 0, etCHARX,      0,  0, 23 }
 };
 
 /* Additional Notes:
@@ -375,8 +380,8 @@ void sqlite3_str_vappendf(
     }
 #else
     /* Fast hash-table lookup */
-    assert( ArraySize(fmtinfo)==23 );
-    idx = ((unsigned)c) % 23;
+    assert( ArraySize(fmtinfo)==25 );
+    idx = ((unsigned)c) % 25;
     if( fmtinfo[idx].fmttype==c
      || fmtinfo[idx = fmtinfo[idx].iNxt].fmttype==c
     ){
@@ -747,7 +752,7 @@ void sqlite3_str_vappendf(
 
         if( zExtra==0 ){
           /* The result is being rendered directory into pAccum.  This
-          ** is the command and fast case */
+          ** is the common and fast case */
           pAccum->nChar += length;
           zOut[length] = 0;
           continue;
@@ -867,6 +872,83 @@ void sqlite3_str_vappendf(
           while( ii>=0 ) if( (bufpt[ii--] & 0xc0)==0x80 ) width++;
         }
         break;
+      case etESCAPE_j:           /* %j: JSON string literal w/o "..." */
+      case etESCAPE_J: {         /* %J: Generate a JSON string literal */
+        char *escarg;
+        i64 i, j, px, iStart;
+        unsigned char ch;
+
+        if( bArgList ){
+          escarg = getTextArg(pArgList);
+        }else{
+          escarg = va_arg(ap,char*);
+        }
+        iStart = sqlite3_str_length(pAccum);
+        if( escarg==0 ){
+          if( xtype==etESCAPE_J ) sqlite3_str_append(pAccum, "null", 4);
+        }else{
+          if( xtype==etESCAPE_J ) sqlite3_str_append(pAccum, "\"", 1);
+          px = precision;
+          testcase( px==0 );
+          if( px<0 ){
+            px = 0x7fffffff;
+          }else if( flag_altform2 ){
+            /* Convert precision from code-points to bytes */
+            for(i=0; i<px && escarg[i]; i++){
+              if( (escarg[i]&0xc0)==0x80 ) px++;
+            }
+            if( i==px ){
+              while( (escarg[px]&0xc0)==0x80 ) px++;
+            }
+          }
+          for(i=j=0; i<px; i++){
+            if( (ch = ((u8*)escarg)[i])<=0x1f || ch=='"' || ch=='\\' ){
+              if( j<i ) sqlite3_str_append(pAccum, &escarg[j], i-j);
+              j = i+1;
+              if( ch==0 ) break;
+              sqlite3_str_appendchar(pAccum, 1, '\\');
+              if( ch>0x1f ){
+                sqlite3_str_appendchar(pAccum, 1, ch);
+              }else if( ((1u<<ch)&0x3700)!=0 ){
+                ch = "btn?fr"[ch-8];
+                sqlite3_str_appendchar(pAccum, 1, ch);
+              }else{
+                sqlite3_str_append(pAccum, "u00", 3);
+                sqlite3_str_appendchar(pAccum, 1, aHex[ch>>4]);
+                sqlite3_str_appendchar(pAccum, 1, aHex[ch&0xf]);
+              }
+            }
+          }
+          if( j<i ) sqlite3_str_append(pAccum, &escarg[j], i-j);
+          if( xtype==etESCAPE_J ) sqlite3_str_append(pAccum, "\"", 1);
+        }
+        if( width>0 && sqlite3_str_errcode(pAccum)==SQLITE_OK ){
+          sqlite3_int64 n = sqlite3_str_length(pAccum) - iStart;
+          sqlite3_int64 len = n;
+          char *zz;
+          if( flag_altform2 && n>0 ){
+            zz = sqlite3_str_value(pAccum);
+            for(i=iStart; zz[i]; i++){
+              if( (zz[i]&0xc0)==0x80 ) len--;
+            }
+          }
+          if( width>len ){
+            sqlite3_int64 sp = width-len;
+            assert( sp>0 && sp<0x7fffffff );
+            sqlite3_str_appendchar(pAccum, (int)sp, ' ');
+            if( !flag_leftjustify
+             && n>0
+             && sqlite3_str_errcode(pAccum)==0
+            ){
+              zz = sqlite3_str_value(pAccum);
+              zz += iStart;
+              memmove(zz+sp, zz, n);
+              memset(zz, ' ', sp);
+            }
+          }
+        }
+        continue;
+      }
       case etESCAPE_q:          /* %q: Escape ' characters */
       case etESCAPE_Q:          /* %Q: Escape ' and enclose in '...' */
       case etESCAPE_w: {        /* %w: Escape " characters */
@@ -958,7 +1040,7 @@ void sqlite3_str_vappendf(
               bufpt[j++] = '0';
               bufpt[j++] = '0';
               bufpt[j++] = ch>=0x10 ? '1' : '0';
-              bufpt[j++] = "0123456789abcdef"[ch&0xf];
+              bufpt[j++] = aHex[ch&0xf];
             }
           }
         }else{
@@ -1322,7 +1404,7 @@ void sqlite3_str_reset(StrAccum *p){
 ** of its content, all in one call.
 */
 void sqlite3_str_free(sqlite3_str *p){
-  if( p ){
+  if( p!=0 && p!=&sqlite3OomStr ){
     sqlite3_str_reset(p);
     sqlite3_free(p);
   }

src/resolve.c

@@ -774,6 +774,7 @@ static int lookupName(
         pExpr->op = TK_FUNCTION;
         pExpr->u.zToken = "coalesce";
         pExpr->x.pList = pFJMatch;
+        pExpr->affExpr = SQLITE_AFF_DEFER;
         cnt = 1;
         goto lookupname_end;
       }else{
@@ -836,9 +837,7 @@ lookupname_end:
   if( cnt==1 ){
     assert( pNC!=0 );
 #ifndef SQLITE_OMIT_AUTHORIZATION
-    if( pParse->db->xAuth
-     && (pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER)
-    ){
+    if( db->xAuth && (pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER) ){
       sqlite3AuthRead(pParse, pExpr, pSchema, pNC->pSrcList);
     }
 #endif
@@ -942,6 +941,26 @@ static int exprProbability(Expr *p){
   return (int)(r*134217728.0);
 }
 
+/*
+** Set the EP_SubtArg property on every expression inside of
+** pList.  If any subexpression is actually a subquery, then
+** also set the EP_SubtArg property on the first result-set
+** column of that subquery.
+*/
+static SQLITE_NOINLINE void resolveSetExprSubtypeArg(ExprList *pList){
+  int nn, ii;
+  nn = pList ? pList->nExpr : 0;
+  for(ii=0; ii<nn; ii++){
+    Expr *pExpr = pList->a[ii].pExpr;
+    ExprSetProperty(pExpr, EP_SubtArg);
+    if( pExpr->op==TK_SELECT ){
+      assert( ExprUseXSelect(pExpr) );
+      assert( pExpr->x.pSelect!=0 );
+      resolveSetExprSubtypeArg(pExpr->x.pSelect->pEList);
+    }
+  }
+}
+
 /*
 ** This routine is callback for sqlite3WalkExpr().
 **
@@ -1186,10 +1205,7 @@ static int resolveExprStep(Walker *pWalker, Expr *pExpr){
         if( (pDef->funcFlags & SQLITE_SUBTYPE) 
          || ExprHasProperty(pExpr, EP_SubtArg) 
         ){
-          int ii;
-          for(ii=0; ii<n; ii++){
-            ExprSetProperty(pList->a[ii].pExpr, EP_SubtArg);
-          }
+          resolveSetExprSubtypeArg(pList);
         }
 
         if( pDef->funcFlags & (SQLITE_FUNC_CONSTANT|SQLITE_FUNC_SLOCHNG) ){
@@ -1219,8 +1235,13 @@ static int resolveExprStep(Walker *pWalker, Expr *pExpr){
           /* Internal-use-only functions are disallowed unless the
           ** SQL is being compiled using sqlite3NestedParse() or
           ** the SQLITE_TESTCTRL_INTERNAL_FUNCTIONS test-control has be
-          ** used to activate internal functions for testing purposes */
-          no_such_func = 1;
+          ** used to activate internal functions for testing purposes.
+          **
+          ** The 2 value for no_such_func means that the function is
+          ** an internal-use-only function which should be treated as a
+          ** non-existant function for name resolution purposes.
+          */
+          no_such_func = 2;
           pDef = 0;
         }else
         if( (pDef->funcFlags & (SQLITE_FUNC_DIRECT|SQLITE_FUNC_UNSAFE))!=0
@@ -1264,9 +1285,16 @@ static int resolveExprStep(Walker *pWalker, Expr *pExpr){
           is_agg = 0;
         }
 #endif
-        else if( no_such_func && pParse->db->init.busy==0
+        else if( no_such_func
+              && (pParse->db->init.busy==0 ||
+                  (no_such_func==2 && pParse->db->init.busy==2))
+              /* Suppress "no such function" errors when reading
+              ** the sqlite_schema table.  Except, do raise the error
+              ** if init.busy is 2, meaning the schema parse is due
+              ** to an ALTER TABLE ADD COLUMN statement, and the function
+              ** is an internal-use-only function (no_such_func==2). */
 #ifdef SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION
-                  && pParse->explain==0
+              && pParse->explain==0
 #endif
         ){
           sqlite3ErrorMsg(pParse, "no such function: %#T", pExpr);

src/select.c

@@ -7324,6 +7324,7 @@ static SQLITE_NOINLINE void existsToJoin(
    && !ExprHasProperty(pWhere, EP_OuterON|EP_InnerON) 
    && ALWAYS(p->pSrc!=0)
    && p->pSrc->nSrc<BMS
+   && (p->pLimit==0 || p->pLimit->pRight==0)
   ){
     if( pWhere->op==TK_AND ){
       Expr *pRight = pWhere->pRight;
@@ -7371,7 +7372,6 @@ static SQLITE_NOINLINE void existsToJoin(
           sqlite3TreeViewSelect(0, p, 0);
         }
 #endif
-        existsToJoin(pParse, p, pSubWhere);
       }
     }
   }

src/sqlite.h.in

@@ -2992,7 +2992,7 @@ int sqlite3_is_interrupted(sqlite3*);
 ** then the return value from sqlite3_complete16() will be non-zero
 ** regardless of whether or not the input SQL is complete.)^
 **
-** The X input to [sqlite3_complete(X)] and [sqlite3_incomplete(X)
+** The X input to [sqlite3_complete(X)] and [sqlite3_incomplete(X)]
 ** must be a zero-terminated UTF-8 string.
 **
 ** The input to [sqlite3_complete16()] must be a zero-terminated
@@ -4054,8 +4054,7 @@ int sqlite3_open_v2(
 **
 ** The sqlite3_uri_int64(F,P,D) routine converts the value of P into a
 ** 64-bit signed integer and returns that integer, or D if P does not
-** exist.  If the value of P is something other than an integer, then
-** zero is returned.
+** exist or ff the value of P is something other than an integer.
 **
 ** The sqlite3_uri_key(F,N) returns a pointer to the name (not
 ** the value) of the N-th query parameter for filename F, or a NULL

src/sqlite3ext.h

@@ -376,6 +376,8 @@ struct sqlite3_api_routines {
   void (*str_free)(sqlite3_str*);
   int (*carray_bind)(sqlite3_stmt*,int,void*,int,int,void(*)(void*));
   int (*carray_bind_v2)(sqlite3_stmt*,int,void*,int,int,void(*)(void*),void*);
+  /* Version 3.54.0 and later */
+  sqlite3_int64 (*incomplete)(const char*);
 };
 
 /*
@@ -719,6 +721,8 @@ typedef int (*sqlite3_loadext_entry)(
 #define sqlite3_str_free               sqlite3_api->str_free
 #define sqlite3_carray_bind            sqlite3_api->carray_bind
 #define sqlite3_carray_bind_v2         sqlite3_api->carray_bind_v2
+/* Version 3.54.0 and later */
+#define sqlite3_incomplete             sqlite3_api->incomplete
 #endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */
 
 #if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)

src/sqliteInt.h

@@ -202,7 +202,7 @@
 #include "sqlite3.h"
 
 /*
-** Reuse the STATIC_LRU for mutex access to sqlite3_temp_directory.
+** Reuse the STATIC_VFS1 for mutex access to sqlite3_temp_directory.
 */
 #define SQLITE_MUTEX_STATIC_TEMPDIR SQLITE_MUTEX_STATIC_VFS1
 
@@ -1700,7 +1700,7 @@ struct sqlite3 {
   struct sqlite3InitInfo {      /* Information used during initialization */
     Pgno newTnum;               /* Rootpage of table being initialized */
     u8 iDb;                     /* Which db file is being initialized */
-    u8 busy;                    /* TRUE if currently initializing */
+    u8 busy;                    /* TRUE if initing. 2 if due to ADD COLUMN */
     unsigned orphanTrigger : 1; /* Last statement is orphaned TEMP trigger */
     unsigned imposterTable : 2; /* Building an imposter table */
     unsigned reopenMemdb : 1;   /* ATTACH is really a reopen using MemDB */
@@ -4251,7 +4251,7 @@ typedef struct {
 #define INITFLAG_AlterRename   0x0001  /* Reparse after a RENAME */
 #define INITFLAG_AlterDrop     0x0002  /* Reparse after a DROP COLUMN */
 #define INITFLAG_AlterAdd      0x0003  /* Reparse after an ADD COLUMN */
-#define INITFLAG_AlterDropCons 0x0004  /* Reparse after an ADD COLUMN */
+#define INITFLAG_AlterDropCons 0x0004  /* Reparse after a DROP CONSTRAINT */
 
 /* Tuning parameters are set using SQLITE_TESTCTRL_TUNE and are controlled
 ** on debug-builds of the CLI using ".testctrl tune ID VALUE".  Tuning
@@ -4612,6 +4612,57 @@ Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*);
 /*
 ** Assuming zIn points to the first byte of a UTF-8 character,
 ** advance zIn to point to the first byte of the next UTF-8 character.
+**
+** # Dividing malformed UTF-8 into characters (tag-20260418-01)
+**
+** If a text input is malformed UTF-8, SQLite does not make any guarantees
+** about how the bytes are divided up into characters.  The system promises
+** to not overflow an array or cause other memory errors when presented
+** with malformed UTF-8.  And it promises to preserve the specific
+** sequence of bytes as long as no conversion occur.  But beyond that,
+** there are no guarantees.  Results can vary from one version to the
+** next.
+**
+** The SQLITE_SKIP_UTF8 macro below is one technique for dividing UTF-8
+** into characters.  The length() and substr() SQL functions use a
+** different technique when searching across multiple characters, a
+** technique that exchanges a subtraction for comparison of z and results
+** in faster machine code on some compilers and architectures.  The code
+** in substr() to skip over p1 characters goes something like this:
+**
+**    for( ; p1>0; p1--){
+**                     // vvvv--- tag-20260418-01
+**      if( (u8)(z[0]-1)<(0x80-1) ){
+**        z++;
+**      }else if( z[0]==0 ){
+**        break;
+**      }else{
+**        do{ z++; }while( (z[0]&0xc0)==0x80 );
+**      }
+**    }
+**
+** In valid UTF-8, multibyte characters always begin with a byte with the
+** two most significant bits set and that is followed by one or more bytes
+** for which the two most significant bits are 10.  In other words:
+**
+**     First byte:        (BYTE & 0xc0)==0xc0
+**     Following bytes:   (BYTE & 0xc0)==0x80
+**
+** What to do if the input byte sequence contain a "following byte" that
+** is not preceded by a "first byte"?  How many characters are in the
+** byte sequence:  0x61 0x81 0x82 0x7a?  3 or 4 or something else?
+** 
+** If you use the macro below, the answer will be 4.  If you use the code
+** snippet demonstrated at tag-20260418-01, then answer is 3.  If you
+** use a variant of tag-20260418-01 where the constant of comparison is
+** 0xc0-1 instead of 0x80-1 then the answer is again 4.  The key point is
+** that because the input is malformed UTF-8, so is no "correct" answer.
+** SQLite is free to use either value.
+**
+** It turns out that GCC 13.3.0 is able to generate faster code (at least
+** on x86-64) if the constant at tag-20260418-01 is (0x80-1).  If you make
+** that constant (0xc0-1) instead, gcc 13.3.0 generates code that runs slower.
+** So the (0x80-1) constant is used for substr() and length().
 */
 #define SQLITE_SKIP_UTF8(zIn) {                        \
   if( (*(zIn++))>=0xc0 ){                              \
@@ -5453,7 +5504,15 @@ void sqlite3AlterFunctions(void);
 void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
 void sqlite3AlterRenameColumn(Parse*, SrcList*, Token*, Token*);
 void sqlite3AlterDropConstraint(Parse*,SrcList*,Token*,Token*);
-void sqlite3AlterAddConstraint(Parse*,SrcList*,Token*,Token*,const char*,int);
+void sqlite3AlterAddConstraint(
+  Parse *pParse,           /* Parse context */
+  SrcList *pSrc,           /* Table to add constraint to */
+  Token *pFirst,           /* First token of new constraint */
+  Token *pName,            /* Name of new constraint. NULL if name omitted. */
+  const char *zExpr,       /* Text of CHECK expression */
+  int nExpr,               /* Size of pExpr in bytes */
+  Expr *pExpr              /* The parsed CHECK expression */
+);
 void sqlite3AlterSetNotNull(Parse*, SrcList*, Token*, Token*);
 i64 sqlite3GetToken(const unsigned char *, int *);
 void sqlite3NestedParse(Parse*, const char*, ...);

src/test1.c

@@ -355,7 +355,7 @@ static int SQLITE_TCLAPI test_exec_hex(
   if( getDbPointer(interp, argv[1], &db) ) return TCL_ERROR;
   zHex = argv[2];
   for(i=j=0; i<(sizeof(zSql)-1) && zHex[j]; i++, j++){
-    if( zHex[j]=='%' && zHex[j+2] && zHex[j+2] ){
+    if( zHex[j]=='%' && zHex[j+1] && zHex[j+2] ){
       zSql[i] = (testHexToInt(zHex[j+1])<<4) + testHexToInt(zHex[j+2]);
       j += 2;
     }else{

src/util.c

@@ -465,15 +465,20 @@ u8 sqlite3StrIHash(const char *z){
   return h;
 }
 
+#if !defined(SQLITE_DISABLE_INTRINSIC)               \
+  && (defined(__GNUC__) || defined(__clang__))       \
+  && (defined(__x86_64__) || defined(__aarch64__) || \
+      (defined(__riscv) && defined(__riscv_xlen) && (__riscv_xlen>32)))
+#define SQLITE_USE_UINT128
+#endif
+
 /*
 ** Two inputs are multiplied to get a 128-bit result.  Write the
 ** lower 64-bits of the result into *pLo, and return the high-order
 ** 64 bits.
 */
 static u64 sqlite3Multiply128(u64 a, u64 b, u64 *pLo){
-#if (defined(__GNUC__) || defined(__clang__)) \
-        && (defined(__x86_64__) || defined(__aarch64__) || defined(__riscv)) \
-        && !defined(SQLITE_DISABLE_INTRINSIC)
+#if defined(SQLITE_USE_UINT128)
   __uint128_t r = (__uint128_t)a * b;
   *pLo = (u64)r;
   return (u64)(r>>64);
@@ -507,9 +512,7 @@ static u64 sqlite3Multiply128(u64 a, u64 b, u64 *pLo){
 ** The lower 64 bits of A*B are discarded.
 */
 static u64 sqlite3Multiply160(u64 a, u32 aLo, u64 b, u32 *pLo){
-#if (defined(__GNUC__) || defined(__clang__)) \
-        && (defined(__x86_64__) || defined(__aarch64__) || defined(__riscv)) \
-        && !defined(SQLITE_DISABLE_INTRINSIC)
+#if defined(SQLITE_USE_UINT128)
   __uint128_t r = (__uint128_t)a * b;
   r += ((__uint128_t)aLo * b) >> 32;
   *pLo = (r>>32)&0xffffffff;
@@ -547,6 +550,8 @@ static u64 sqlite3Multiply160(u64 a, u32 aLo, u64 b, u32 *pLo){
 #endif
 }
 
+#undef SQLITE_USE_UINT128
+
 /*
 ** Return a u64 with the N-th bit set.
 */
@@ -785,7 +790,7 @@ static double sqlite3Fp10Convert2(u64 d, int p){
   u64 pwr10h, x, hi, lo, sticky, u, m;
   double r;
   if( p<POWERSOF10_FIRST ) return 0.0;
-  if( p>POWERSOF10_LAST ) return INFINITY;
+  if( p>POWERSOF10_LAST ) return (double)INFINITY;
   b = 64 - countLeadingZeros(d);
   lp = pwr10to2(p);
   e = 53 - b - lp;
@@ -815,7 +820,7 @@ static double sqlite3Fp10Convert2(u64 d, int p){
     e -= adj;
   }
   m = (u + 1 + ((u>>2)&1)) >> 2;
-  if( e<=(-972) ) return INFINITY;
+  if( e<=(-972) ) return (double)INFINITY;
   if((m & U64_BIT(52)) != 0){
     m = (m & ~U64_BIT(52)) | ((u64)(1075-e)<<52);
   }

src/vdbe.c

@@ -437,10 +437,12 @@ int sqlite3_value_numeric_type(sqlite3_value *pVal){
   int eType = sqlite3_value_type(pVal);
   if( eType==SQLITE_TEXT ){
     Mem *pMem = (Mem*)pVal;
-    assert( pMem->db!=0 );
-    sqlite3_mutex_enter(pMem->db->mutex);
+#if SQLITE_THREADSAFE>0
+    sqlite3_mutex *pMutex = pMem->db ? pMem->db->mutex : 0;
+#endif
+    sqlite3_mutex_enter(pMutex);
     applyNumericAffinity(pMem, 0);
-    sqlite3_mutex_leave(pMem->db->mutex);
+    sqlite3_mutex_leave(pMutex);
     eType = sqlite3_value_type(pVal);
   }
   return eType;
@@ -708,7 +710,6 @@ static u64 filterHash(const Mem *aMem, const Op *pOp){
   return h;
 }
 
-
 /*
 ** For OP_Column, factor out the case where content is loaded from
 ** overflow pages, so that the code to implement this case is separate
@@ -794,6 +795,40 @@ static SQLITE_NOINLINE int vdbeColumnFromOverflow(
   return rc;
 }
 
+/*
+** Memory cell pMem may contain a blob or a NULL value. Cursor pCsr is
+** open on an index. If the current index entry matches the blob value in
+** pMem byte-for-byte, set pMem to NULL and return 1. Otherwise, return 0.
+**
+** If an error occurs, set (*pRc) to an SQLite error code. Return 1 in this
+** case as well.
+*/
+static SQLITE_NOINLINE int vdbeIndexKeyCompare(
+  BtCursor *pCsr,                 /* Cursor to compare key to */
+  Mem *pMem,
+  int *pRc
+){
+  int ret = 0;
+  u32 nKey = 0;
+
+  assert( pMem->flags & (MEM_Blob|MEM_Null) );
+  nKey = sqlite3BtreePayloadSize(pCsr);
+  if( nKey==(u32)pMem->n && ALWAYS((pMem->flags & MEM_Blob)!=0) ){
+    /* This code could just use sqlite3BtreePayloadFetch(). But calling that
+    ** function here apparently prevents compilers from inlining it in other,
+    ** more performance critical, places. So this code uses
+    ** MemFromBtreeZeroOffset(), which is just as fast in most cases, but also
+    ** handles the case where the index record uses overflow pages. */
+    Mem m;
+    memset(&m, 0, sizeof(m));
+    *pRc = sqlite3VdbeMemFromBtreeZeroOffset(pCsr, nKey, &m);
+    ret = (*pRc!=SQLITE_OK || 0==memcmp(pMem->z, m.z, nKey));
+    sqlite3VdbeMemReleaseMalloc(&m);
+  }
+
+  return ret;
+}
+
 /*
 ** Send a "statement aborts" message to the error log.
 */
@@ -6622,15 +6657,20 @@ case OP_SorterInsert: {     /* in2 */
   break;
 }
 
-/* Opcode: IdxDelete P1 P2 P3 P4 *
-** Synopsis: key=r[P2@P3]
+/* Opcode: IdxDelete P1 P2 P3 P4 P5
+** Synopsis: key=r[P2@P5]
 **
-** The content of P3 registers starting at register P2 form
+** The content of P5 registers starting at register P2 form
 ** an unpacked index key. This opcode removes that entry from the
 ** index opened by cursor P1.
 **
 ** P4 is a pointer to an Index structure.
 **
+** If P3 is non-zero, it is the register number of a register holding
+** a record that will be inserted into this index. If that record is
+** identical to the one that would be deleted by this instruction, 
+** skip the delete and set register P3 to NULL.
+**
 ** Raise an SQLITE_CORRUPT_INDEX error if no matching index entry is found
 ** and not in writable_schema mode.
 */
@@ -6640,8 +6680,8 @@ case OP_IdxDelete: {
   int res;
   UnpackedRecord r;
 
-  assert( pOp->p3>0 );
-  assert( pOp->p2>0 && pOp->p2+pOp->p3<=(p->nMem+1 - p->nCursor)+1 );
+  assert( pOp->p5>0 );
+  assert( pOp->p2>0 && pOp->p2+pOp->p5<=(p->nMem+1 - p->nCursor)+1 );
   assert( pOp->p1>=0 && pOp->p1<p->nCursor );
   pC = p->apCsr[pOp->p1];
   assert( pC!=0 );
@@ -6650,7 +6690,7 @@ case OP_IdxDelete: {
   pCrsr = pC->uc.pCursor;
   assert( pCrsr!=0 );
   r.pKeyInfo = pC->pKeyInfo;
-  r.nField = (u16)pOp->p3;
+  r.nField = pOp->p5;
   r.default_rc = 0;
   r.aMem = &aMem[pOp->p2];
   rc = sqlite3BtreeIndexMoveto(pCrsr, &r, &res);
@@ -6669,6 +6709,13 @@ case OP_IdxDelete: {
       break;
     }
   }
+
+  if( pOp->p3 && vdbeIndexKeyCompare(pCrsr, &aMem[pOp->p3], &rc) ){
+    if( rc ) goto abort_due_to_error;
+    sqlite3VdbeMemSetNull(&aMem[pOp->p3]);
+    break;
+  }
+
   rc = sqlite3BtreeDelete(pCrsr, BTREE_AUXDELETE);
   if( rc ) goto abort_due_to_error;
   assert( pC->deferredMoveto==0 );
@@ -7102,12 +7149,19 @@ case OP_SqlExec: {
   break;
 }
 
-/* Opcode: ParseSchema P1 * * P4 *
+/* Opcode: ParseSchema P1 * * P4 P5
 **
 ** Read and parse all entries from the schema table of database P1
 ** that match the WHERE clause P4.  If P4 is a NULL pointer, then the
 ** entire schema for P1 is reparsed.
 **
+** When P4 is NULL, the P5 value is used as the mFlags argument
+** to sqlite3InitOne().  In other words, P5 should be a mask composed
+** of INITFLAG_* values.
+**
+** The P4==0 case is only used by ALTER TABLE and P5!=0 for all such
+** cases.  For uses other than ALTER TABLE, P4<>0 and P5==0.
+**
 ** This opcode invokes the parser to create a new virtual machine,
 ** then runs the new virtual machine.  It is thus a re-entrant opcode.
 */
@@ -7135,6 +7189,7 @@ case OP_ParseSchema: {
 
 #ifndef SQLITE_OMIT_ALTERTABLE
   if( pOp->p4.z==0 ){
+    assert( pOp->p5!=0 );
     sqlite3SchemaClear(db->aDb[iDb].pSchema);
     db->mDbFlags &= ~DBFLAG_SchemaKnownOk;
     rc = sqlite3InitOne(db, iDb, &p->zErrMsg, pOp->p5);
@@ -7143,6 +7198,7 @@ case OP_ParseSchema: {
   }else
 #endif
   {
+    assert( pOp->p5==0 );
     zSchema = LEGACY_SCHEMA_TABLE;
     initData.db = db;
     initData.iDb = iDb;

src/vdbeaux.c

@@ -556,11 +556,21 @@ void sqlite3VdbeExplainPop(Parse *pParse){
 ** sqlite3VdbeAddOp4() since it needs to also needs to mark all btrees
 ** as having been used.
 **
-** The zWhere string must have been obtained from sqlite3_malloc().
+** zWhere is a WHERE clause that defines which entries of the schema
+** to reparse.  If zWhere==0, that means all entries.  p5 is a mask
+** of INITFLAG_* values for the parse.
+**
+** In the current usage, the following are always true:
+**
+**     ALTER TABLE:     zWhere==0,  p5!=0
+**     Otherwise:       zWhere!=0,  p5==0
+**
+** The zWhere string must have been obtained from sqlite3DbMalloc().
 ** This routine will take ownership of the allocated memory.
 */
 void sqlite3VdbeAddParseSchemaOp(Vdbe *p, int iDb, char *zWhere, u16 p5){
   int j;
+  assert( p5==0 || zWhere==0 );
   sqlite3VdbeAddOp4(p, OP_ParseSchema, iDb, 0, 0, zWhere, P4_DYNAMIC);
   sqlite3VdbeChangeP5(p, p5);
   for(j=0; j<p->db->nDb; j++) sqlite3VdbeUsesBtree(p, j);
@@ -1900,7 +1910,6 @@ static void displayP4Expr(StrAccum *p, Expr *pExpr){
 #if VDBE_DISPLAY_P4
 /*
 ** Compute a string that describes the P4 parameter for an opcode.
-** Use zTemp for any required temporary buffer space.
 */
 char *sqlite3VdbeDisplayP4(sqlite3 *db, Op *pOp){
   char *zP4 = 0;

src/where.c

@@ -163,7 +163,7 @@ int sqlite3WhereBreakLabel(WhereInfo *pWInfo){
 ** If the ONEPASS optimization is used (if this routine returns true)
 ** then also write the indices of open cursors used by ONEPASS
 ** into aiCur[0] and aiCur[1].  iaCur[0] gets the cursor of the data
-** table and iaCur[1] gets the cursor used by an auxiliary index.
+** table and aiCur[1] gets the cursor used by an auxiliary index.
 ** Either value may be -1, indicating that cursor is not used.
 ** Any cursors returned will have been opened for writing.
 **
@@ -3088,9 +3088,10 @@ static void whereLoopOutputAdjust(
          && (pTerm->wtFlags & TERM_HIGHTRUTH)==0  /* tag-20200224-1 */
         ){
           Expr *pRight = pOpExpr->pRight;
+          Parse *pParse = pWC->pWInfo->pParse;
           int k = 0;
           testcase( pOpExpr->op==TK_IS );
-          if( sqlite3ExprIsInteger(pRight, &k, 0) && k>=(-1) && k<=1 ){
+          if( sqlite3ExprIsInteger(pRight, &k, pParse) && k>=(-1) && k<=1 ){
             k = 10;
           }else{
             k = 20;
@@ -3187,7 +3188,8 @@ static int whereRangeVectorLen(
     idxaff = sqlite3TableColumnAffinity(pIdx->pTable, pLhs->iColumn);
     if( aff!=idxaff ) break;
 
-    pColl = sqlite3ExprCompareCollSeq(pParse, pTerm->pExpr);
+    if( ExprHasProperty(pTerm->pExpr, EP_Commuted) ) SWAP(Expr*, pRhs, pLhs);
+    pColl = sqlite3BinaryCompareCollSeq(pParse, pLhs, pRhs);
     if( pColl==0 ) break;
     if( sqlite3StrICmp(pColl->zName, pIdx->azColl[i+nEq]) ) break;
   }
@@ -7583,27 +7585,11 @@ void sqlite3WhereEnd(WhereInfo *pWInfo){
       }
 #endif /* SQLITE_DISABLE_SKIPAHEAD_DISTINCT */
     }
-    if( pTabList->a[pLevel->iFrom].fg.fromExists
-     && (i==pWInfo->nLevel-1
-           || pTabList->a[pWInfo->a[i+1].iFrom].fg.fromExists==0)
-    ){
-      /* This is an EXISTS-to-JOIN optimization which is either the
-      ** inner-most loop, or the inner-most of a group of nested
-      ** EXISTS-to-JOIN optimization loops.  If this loop sees a successful
-      ** row, it should break out of itself as well as other EXISTS-to-JOIN
-      ** loops in which is is directly nested. */
-      int nOuter = 0; /* Nr of outer EXISTS that this one is nested within */
-      while( nOuter<i ){
-        if( !pTabList->a[pLevel[-nOuter-1].iFrom].fg.fromExists ) break;
-        nOuter++;
-      }
-      testcase( nOuter>0 );
-      sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel[-nOuter].addrBrk);
-      if( nOuter ){
-        VdbeComment((v, "EXISTS break %d..%d", i-nOuter, i));
-      }else{
-        VdbeComment((v, "EXISTS break %d", i));
-      }
+    if( pTabList->a[pLevel->iFrom].fg.fromExists ){
+      /* This is an EXISTS-to-JOIN optimization loop. If this loop sees a 
+      ** successful row, it should break out of itself. */
+      sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel->addrBrk);
+      VdbeComment((v, "EXISTS break %d", i));
     }
     sqlite3VdbeResolveLabel(v, pLevel->addrCont);
     if( pLevel->op!=OP_Noop ){

src/wherecode.c

@@ -2297,7 +2297,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
     ** by this loop in the a[0] slot and all notReady tables in a[1..] slots.
     ** This becomes the SrcList in the recursive call to sqlite3WhereBegin().
     */
-    if( pWInfo->nLevel>1 ){
+    if( pWInfo->nLevel>1 || pTabItem->fg.fromExists ){
       int nNotReady;                 /* The number of notReady tables */
       SrcItem *origSrc;              /* Original list of tables */
       nNotReady = pWInfo->nLevel - iLevel - 1;
@@ -2310,6 +2310,13 @@ Bitmask sqlite3WhereCodeOneLoopStart(
       for(k=1; k<=nNotReady; k++){
         memcpy(&pOrTab->a[k], &origSrc[pLevel[k].iFrom], sizeof(pOrTab->a[k]));
       }
+
+      /* Clear the fromExists flag on the OR-optimized table entry so that
+      ** the calls to sqlite3WhereEnd() do not code early-exits after the
+      ** first row is visited. The early exit applies to this table's
+      ** overall loop - including the multiple OR branches and any WHERE
+      ** conditions not passed to the sub-loops - not to the sub-loops.  */
+      pOrTab->a[0].fg.fromExists = 0;
     }else{
       pOrTab = pWInfo->pTabList;
     }
@@ -2553,7 +2560,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
     assert( pLevel->op==OP_Return );
     pLevel->p2 = sqlite3VdbeCurrentAddr(v);
 
-    if( pWInfo->nLevel>1 ){ sqlite3DbFreeNN(db, pOrTab); }
+    if( pWInfo->pTabList!=pOrTab ){ sqlite3DbFreeNN(db, pOrTab); }
     if( !untestedTerms ) disableTerm(pLevel, pTerm);
   }else
 #endif /* SQLITE_OMIT_OR_OPTIMIZATION */

src/whereexpr.c

@@ -954,8 +954,7 @@ static void exprAnalyzeOrTerm(
 **   3.  Not originating in the ON clause of an OUTER JOIN
 **   4.  The operator is not IS or else the query does not contain RIGHT JOIN
 **   5.  The affinities of A and B must be compatible
-**   6a. Both operands use the same collating sequence OR
-**   6b. The overall collating sequence is BINARY
+**   6.  Both operands use the same collating sequence
 ** If this routine returns TRUE, that means that the RHS can be substituted
 ** for the LHS anyplace else in the WHERE clause where the LHS column occurs.
 ** This is an optimization.  No harm comes from returning 0.  But if 1 is
@@ -963,7 +962,6 @@ static void exprAnalyzeOrTerm(
 */
 static int termIsEquivalence(Parse *pParse, Expr *pExpr, SrcList *pSrc){
   char aff1, aff2;
-  CollSeq *pColl;
   if( !OptimizationEnabled(pParse->db, SQLITE_Transitive) ) return 0;  /* (1) */
   if( pExpr->op!=TK_EQ && pExpr->op!=TK_IS ) return 0;                 /* (2) */
   if( ExprHasProperty(pExpr, EP_OuterON) ) return 0;                   /* (3) */
@@ -981,10 +979,7 @@ static int termIsEquivalence(Parse *pParse, Expr *pExpr, SrcList *pSrc){
   ){
     return 0;                                                          /* (5) */
   }
-  pColl = sqlite3ExprCompareCollSeq(pParse, pExpr);
-  if( !sqlite3IsBinary(pColl)
-   && !sqlite3ExprCollSeqMatch(pParse, pExpr->pLeft, pExpr->pRight)
-  ){
+  if( !sqlite3ExprCollSeqMatch(pParse, pExpr->pLeft, pExpr->pRight) ){
     return 0;                                                          /* (6) */
   }
   return 1;
@@ -1316,7 +1311,7 @@ static void exprAnalyze(
   /* Analyze a term that is composed of two or more subterms connected by
   ** an OR operator.
   */
-  else if( pExpr->op==TK_OR ){
+  else if( pExpr->op==TK_OR && !ExprHasProperty(pExpr, EP_Collate) ){
     assert( pWC->op==TK_AND );
     exprAnalyzeOrTerm(pSrc, pWC, idxTerm);
     pTerm = &pWC->a[idxTerm];

test/alter.test

@@ -981,6 +981,15 @@ do_execsql_test alter-21.4 {
   SELECT name, type FROM sqlite_schema ORDER BY name;
 } {r2 trigger t1 table t99 table}
 
-
+# 2026-05-12 Verify that ADD COLUMN cannot insert internal-use-only
+# functions.
+#
+reset_db
+do_execsql_test alter-22.1 {
+  CREATE TABLE t1(a,b);
+}
+do_catchsql_test alter-22.2 {
+  ALTER TABLE t1 ADD COLUMN c CHECK( if(c<10,1,sqlite_fail('bummer',1)));
+} {1 {error in table t1 after add column: no such function: sqlite_fail}}
 
 finish_test

test/altercons.test

@@ -438,5 +438,19 @@ do_execsql_test 9.2.5 {
   SELECT sql FROM aux.sqlite_schema WHERE name='t2';
 } {{CREATE TABLE t2(x, y, z)}}
 
-finish_test
+# Cannot add constraints the use internal functions.
+# Forum post 2026-05-10T01:11:28Z
+#
+reset_db
+do_execsql_test 10.1 {
+  CREATE TABLE t1(x,y,z);
+  INSERT INTO t1 VALUES(1,'two',x'3333');
+}
+do_catchsql_test 10.2 {
+  ALTER TABLE t1 ADD CONSTRAINT c1 CHECK( sqlite_drop_column(22,'CREATE TABLE a(b,c)', 0));
+} {1 {no such function: sqlite_drop_column}}
+do_catchsql_test 10.3 {
+  ALTER TABLE t1 ADD CONSTRAINT c1 CHECK( x>#2 );
+} {1 {near "#2": syntax error}}
 
+finish_test

test/altercons2.test

@@ -243,5 +243,53 @@ do_execsql_test 11.2.3 {
 do_execsql_test 11.2.2 {ALTER TABLE t2 ALTER b SET NOT NULL --new cons
 ;
 }
+
+#-------------------------------------------------------------------------
+reset_db
+do_execsql_test 12.0 {
+  CREATE TABLE "Test" ( 
+      "IsActive" INTEGER, 
+      CONSTRAINT "BooleanZeroOrOne" CHECK ("IsActive" IN (0, 1)) 
+  );
+}
+
+do_execsql_test 12.1 {
+  ALTER TABLE Test DROP CONSTRAINT BooleanZeroOrOne
+}
+
+do_execsql_test 12.2 {
+  SELECT sql FROM sqlite_schema
+} {
+  {CREATE TABLE "Test" ( 
+      "IsActive" INTEGER)}
+}
+
+do_execsql_test 12.3 {
+  DROP TABLE Test;
+  CREATE TABLE "Test" ( 
+      "IsActive" INTEGER, 
+      CONSTRAINT "BooleanZeroOrOne" CHECK ("IsActive" IN (0, 1)) 
+  );
+}
+
+do_execsql_test 12.4 {
+  ALTER TABLE Test DROP CONSTRAINT "BooleanZeroOrOne"
+}
+
+do_execsql_test 12.5 {
+  SELECT sql FROM sqlite_schema
+} {
+  {CREATE TABLE "Test" ( 
+      "IsActive" INTEGER)}
+}
+
+do_execsql_test 12.6 {
+  CREATE TABLE t1(a, b CONSTRAINT "a""b" CHECK (b IS NOT NULL));
+}
+
+do_execsql_test 12.7 {
+  ALTER TABLE t1 DROP CONSTRAINT "a""b"
+}
+
 finish_test
 

test/amatch1.test

@@ -114,4 +114,20 @@ do_execsql_test amatch1-2.22 {
      WHERE word MATCH 'joxxph' AND distance<300;
 } {}
 
+# Forum post 2026-05-09T05:48:28Z
+reset_db
+load_static_extension db amatch
+do_execsql_test amatch1-3.0 {
+  CREATE TABLE cost(iLang,cFrom,cTo,Cost);
+  INSERT INTO cost VALUES(0,'?','?',1);
+  CREATE TABLE vocab(word TEXT PRIMARY KEY);
+  CREATE VIRTUAL TABLE am USING approximate_match(
+      vocabulary_table=vocab,
+      vocabulary_word=word,
+      edit_distances=cost
+  );
+  INSERT INTO vocab(word) VALUES(format('%.81c','a'));
+  SELECT length(word) FROM am WHERE word MATCH format('%.81c','a');
+} {81}
+
 finish_test

test/analyze3.test

@@ -415,7 +415,7 @@ do_test analyze3-3.4.1 {
 do_test analyze3-3.4.2 {
   sqlite3_bind_text $S 1 "abc" 3
   sqlite3_expired $S
-} {0}
+} {1}
 do_test analyze3-3.4.3 {
   sqlite3_bind_text $S 2 "def" 3
   sqlite3_expired $S

test/auth2.test

@@ -157,4 +157,34 @@ SQLITE_SELECT {} {} {} v2
 }
 db2 close
 
+do_test auth2-3.1 {
+  set ::authargs {}
+  db eval {
+    INSERT INTO t2 SELECT * FROM t1;
+  }
+  set ::authargs
+} {SQLITE_INSERT t2 {} main {}
+SQLITE_SELECT {} {} {} {}
+SQLITE_READ t1 a main {}
+SQLITE_READ t1 b main {}
+SQLITE_READ t1 c main {}
+}
+proc auth {op a0 a1 a2 a3} {
+  global authargs
+  append authargs "$op $a0 [list $a1] [list $a2] [list $a3]\n"
+  if {$op eq "SQLITE_READ" && $a0 eq "t1" && $a1 eq "b"} {
+    return SQLITE_IGNORE
+  }
+  return SQLITE_OK
+}
+db null NULL
+set authargs {}
+do_execsql_test auth2-3.2 {
+  DELETE FROM t1;
+  INSERT INTO t1 VALUES(1,2,3),('a','b','c');
+  DELETE FROM t2;
+  INSERT INTO t2 SELECT * FROM t1;
+  SELECT * FROM t2;
+} {1 NULL 3 a NULL c}
+
 finish_test