Change the OP_InitCoroutine instruction to jump over the co-routine

implementation. FossilOrigin-Name: a522f364a6b8ca6f69c353b30609a2166f6e94cf
Get rid of the OP_Undef and OP_IsUndef opcodes in favor of higher-level
2014-02-07 19:18:10 +00:00 · 2014-02-07 18:27:53 +00:00 · 2014-02-07 13:20:31 +00:00 · 2014-02-07 03:28:02 +00:00 · 2014-02-07 02:29:45 +00:00 · 2014-02-06 23:56:27 +00:00
55 changed files with 1589 additions and 728 deletions
@@ -270,6 +270,17 @@ TCC = $(TCC) -I$(TOP)\ext\rtree
 RCC = $(RCC) -I$(TOP)\ext\rtree
 !ENDIF

+# The mksqlite3c.tcl script accepts some options on the command
+# line.  When compiling with debugging enabled, some of these
+# options are necessary in order to allow debugging symbols to
+# work correctly with Visual Studio when using the amalgamation.
+#
+!IF $(DEBUG)>0
+MKSQLITE3C_ARGS = --linemacros
+!ELSE
+MKSQLITE3C_ARGS =
+!ENDIF
+
 # Define -DNDEBUG to compile without debugging (i.e., for production usage)
 # Omitting the define will cause extra debugging code to be inserted and
 # includes extra comments when "EXPLAIN stmt" is used.
@@ -916,7 +927,7 @@ mptester.exe:	$(TOP)\mptest\mptest.c libsqlite3.lib $(LIBRESOBJS) sqlite3.h
 	echo > .target_source

 sqlite3.c:	.target_source $(TOP)\tool\mksqlite3c.tcl
-	$(TCLSH_CMD) $(TOP)\tool\mksqlite3c.tcl
+	$(TCLSH_CMD) $(TOP)\tool\mksqlite3c.tcl $(MKSQLITE3C_ARGS)
 	copy tsrc\shell.c .
 	copy tsrc\sqlite3ext.h .

@@ -1334,17 +1345,17 @@ sqlite3_analyzer.exe:	sqlite3_analyzer.c $(LIBRESOBJS)
 	$(LTLINK) -DBUILD_sqlite -DTCLSH=2 -I$(TCLINCDIR) sqlite3_analyzer.c \
 		/link $(LTLINKOPTS) $(LTLIBPATHS) $(LIBRESOBJS) $(LTLIBS) $(TLIBS)

-showdb.exe:	$(TOP)\tool\showdb.c sqlite3.c
-	$(LTLINK) -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION -o $@ \
-		$(TOP)\tool\showdb.c sqlite3.c
+showdb.exe:	$(TOP)\tool\showdb.c $(SQLITE3C)
+	$(LTLINK) -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION -Fe$@ \
+		$(TOP)\tool\showdb.c $(SQLITE3C)

-wordcount.exe:	$(TOP)\test\wordcount.c sqlite3.c
-	$(LTLINK) -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION -o $@ \
-		$(TOP)\test\wordcount.c sqlite3.c
+wordcount.exe:	$(TOP)\test\wordcount.c $(SQLITE3C)
+	$(LTLINK) -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION -Fe$@ \
+		$(TOP)\test\wordcount.c $(SQLITE3C)

-speedtest1.exe:	$(TOP)\test\speedtest1.c sqlite3.c
-	$(LTLINK) -DSQLITE_OMIT_LOAD_EXTENSION -o $@ \
-		$(TOP)\test\speedtest1.c sqlite3.c
+speedtest1.exe:	$(TOP)\test\speedtest1.c $(SQLITE3C)
+	$(LTLINK) -DSQLITE_OMIT_LOAD_EXTENSION -Fe$@ \
+		$(TOP)\test\speedtest1.c $(SQLITE3C)

 clean:
 	del /Q *.lo *.ilk *.lib *.obj *.pdb sqlite3.exe libsqlite3.lib
@@ -11,5 +11,5 @@ SQLite3 is a self-contains, zero-configuration, transactional SQL database
 engine.  This extension provides an easy to use interface for accessing
 SQLite database files from Tcl.
 .PP
-For full documentation see http://www.sqlite.org/ and
-in particular http://www.sqlite.org/tclsqlite.html.
+For full documentation see \fIhttp://www.sqlite.org/\fR and
+in particular \fIhttp://www.sqlite.org/tclsqlite.html\fR.
@@ -96,13 +96,13 @@ void sqlite3Fts3HashClear(Fts3Hash *pH){
 */
 static int fts3StrHash(const void *pKey, int nKey){
  const char *z = (const char *)pKey;
-  int h = 0;
+  unsigned h = 0;
  if( nKey<=0 ) nKey = (int) strlen(z);
  while( nKey > 0  ){
    h = (h<<3) ^ h ^ *z++;
    nKey--;
  }
-  return h & 0x7fffffff;
+  return (int)(h & 0x7fffffff);
 }
 static int fts3StrCompare(const void *pKey1, int n1, const void *pKey2, int n2){
  if( n1!=n2 ) return 1;
@@ -1933,7 +1933,6 @@ static int spellfix1Init(
 #define SPELLFIX_COL_COMMAND        11
    }
    if( rc==SQLITE_OK && isCreate ){
-      sqlite3_uint64 r;
      spellfix1DbExec(&rc, db,
         "CREATE TABLE IF NOT EXISTS \"%w\".\"%w_vocab\"(\n"
         "  id INTEGER PRIMARY KEY,\n"
@@ -1945,11 +1944,10 @@ static int spellfix1Init(
         ");\n",
         zDbName, zTableName
      );
-      sqlite3_randomness(sizeof(r), &r);
      spellfix1DbExec(&rc, db,
-         "CREATE INDEX IF NOT EXISTS \"%w\".\"%w_index_%llx\" "
+         "CREATE INDEX IF NOT EXISTS \"%w\".\"%w_vocab_index_langid_k2\" "
            "ON \"%w_vocab\"(langid,k2);",
-         zDbName, zModule, r, zTableName
+         zDbName, zModule, zTableName
      );
    }
    for(i=3; rc==SQLITE_OK && i<argc; i++){
@@ -2051,6 +2049,7 @@ static int spellfix1Close(sqlite3_vtab_cursor *cur){
 **   (D)    scope = $scope
 **   (E)    distance < $distance
 **   (F)    distance <= $distance
+**   (G)    rowid = $rowid
 **
 ** The plan number is a bit mask formed with these bits:
 **
@@ -2060,8 +2059,9 @@ static int spellfix1Close(sqlite3_vtab_cursor *cur){
 **   0x08   (D) is found
 **   0x10   (E) is found
 **   0x20   (F) is found
+**   0x40   (G) is found
 **
-** filter.argv[*] values contains $str, $langid, $top, and $scope,
+** filter.argv[*] values contains $str, $langid, $top, $scope and $rowid
 ** if specified and in that order.
 */
 static int spellfix1BestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
@@ -2070,6 +2070,7 @@ static int spellfix1BestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
  int iTopTerm = -1;
  int iScopeTerm = -1;
  int iDistTerm = -1;
+  int iRowidTerm = -1;
  int i;
  const struct sqlite3_index_constraint *pConstraint;
  pConstraint = pIdxInfo->aConstraint;
@@ -2122,6 +2123,15 @@ static int spellfix1BestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
      iPlan |= pConstraint->op==SQLITE_INDEX_CONSTRAINT_LT ? 16 : 32;
      iDistTerm = i;
    }
+
+    /* Terms of the form:  distance < $dist or distance <= $dist */
+    if( (iPlan & 64)==0
+     && pConstraint->iColumn<0
+     && pConstraint->op==SQLITE_INDEX_CONSTRAINT_EQ
+    ){
+      iPlan |= 64;
+      iRowidTerm = i;
+    }
  }
  if( iPlan&1 ){
    int idx = 2;
@@ -2149,6 +2159,11 @@ static int spellfix1BestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
      pIdxInfo->aConstraintUsage[iDistTerm].omit = 1;
    }
    pIdxInfo->estimatedCost = 1e5;
+  }else if( (iPlan & 64) ){
+    pIdxInfo->idxNum = 64;
+    pIdxInfo->aConstraintUsage[iRowidTerm].argvIndex = 1;
+    pIdxInfo->aConstraintUsage[iRowidTerm].omit = 1;
+    pIdxInfo->estimatedCost = 5;
  }else{
    pIdxInfo->idxNum = 0;
    pIdxInfo->estimatedCost = 1e50;
@@ -2465,16 +2480,23 @@ static int spellfix1FilterForFullScan(
  int argc,
  sqlite3_value **argv
 ){
-  int rc;
+  int rc = SQLITE_OK;
  char *zSql;
  spellfix1_vtab *pVTab = pCur->pVTab;
  spellfix1ResetCursor(pCur);
+  assert( idxNum==0 || idxNum==64 );
  zSql = sqlite3_mprintf(
-     "SELECT word, rank, NULL, langid, id FROM \"%w\".\"%w_vocab\"",
-     pVTab->zDbName, pVTab->zTableName);
+     "SELECT word, rank, NULL, langid, id FROM \"%w\".\"%w_vocab\"%s",
+     pVTab->zDbName, pVTab->zTableName,
+     ((idxNum & 64) ? " WHERE rowid=?" : "")
+  );
  if( zSql==0 ) return SQLITE_NOMEM;
  rc = sqlite3_prepare_v2(pVTab->db, zSql, -1, &pCur->pFullScan, 0);
  sqlite3_free(zSql);
+  if( rc==SQLITE_OK && (idxNum & 64) ){
+    assert( argc==1 );
+    rc = sqlite3_bind_value(pCur->pFullScan, 1, argv[0]);
+  }
  pCur->nRow = pCur->iRow = 0;
  if( rc==SQLITE_OK ){
    rc = sqlite3_step(pCur->pFullScan);
@@ -1,9 +1,9 @@
-C Add\ssupport\sfor\sLIMIT\sand\sOFFSET\sin\sa\srecursive\squery.
-D 2014-01-22T18:07:04.473
+C Change\sthe\sOP_InitCoroutine\sinstruction\sto\sjump\sover\sthe\sco-routine\nimplementation.
+D 2014-02-07T19:18:10.928
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 2ef13430cd359f7b361bb863504e227b25cc7f81
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
-F Makefile.msc 4d4ead6b71d1bf03028fbd61da0ba0ec5e1556e1
+F Makefile.msc 6ff3ff2eef45c7dd309a8626ff7947b20bd387e7
 F Makefile.vxworks db21ed42a01d5740e656b16f92cb5d8d5e5dd315
 F README cd04a36fbc7ea56932a4052d7d0b7f09f27c33d6
 F VERSION 8ed548d87d0a27fd7d7620476f9e25f9fa742d73
@@ -27,7 +27,7 @@ F autoconf/tea/Makefile.in 5c3b0bdfb66c20d55ebff59d1718864461570ca9
 F autoconf/tea/README 3e9a3c060f29a44344ab50aec506f4db903fb873
 F autoconf/tea/aclocal.m4 52c47aac44ce0ddb1f918b6993e8beb8eee88f43
 F autoconf/tea/configure.in e0466b881b53f31f5a4a69e7a91ad130902fb359
-F autoconf/tea/doc/sqlite3.n e268faa1691c33663d3a7faf9fa30673d14bd879
+F autoconf/tea/doc/sqlite3.n e1fe45d4f5286ee3d0ccc877aca2a0def488e9bb
 F autoconf/tea/license.terms 13bd403c9610fd2b76ece0ab50c4c5eda933d523
 F autoconf/tea/pkgIndex.tcl.in 3ef61715cf1c7bdcff56947ffadb26bc991ca39d
 F autoconf/tea/tclconfig/install-sh b087e5c4b92820c60bffb74acc1d9c2d40d80b8f
@@ -83,7 +83,7 @@ F ext/fts3/fts3.h 3a10a0af180d502cecc50df77b1b22df142817fe
 F ext/fts3/fts3Int.h eb5f8029589f3d8f1dc7fd50c773326a640388b1
 F ext/fts3/fts3_aux.c 5c211e17a64885faeb16b9ba7772f9d5445c2365
 F ext/fts3/fts3_expr.c 5165c365cb5a035f5be8bb296f7aa3211d43e4ac
-F ext/fts3/fts3_hash.c 8dd2d06b66c72c628c2732555a32bc0943114914
+F ext/fts3/fts3_hash.c 29b986e43f4e9dd40110eafa377dc0d63c422c60
 F ext/fts3/fts3_hash.h 39cf6874dc239d6b4e30479b1975fe5b22a3caaf
 F ext/fts3/fts3_icu.c e319e108661147bcca8dd511cd562f33a1ba81b5
 F ext/fts3/fts3_porter.c 7f8b4bf5af7c0f20f73b8e87e14fa9298f52e290
@@ -114,7 +114,7 @@ F ext/misc/nextchar.c 35c8b8baacb96d92abbb34a83a997b797075b342
 F ext/misc/percentile.c bcbee3c061b884eccb80e21651daaae8e1e43c63
 F ext/misc/regexp.c af92cdaa5058fcec1451e49becc7ba44dba023dc
 F ext/misc/rot13.c 1ac6f95f99b575907b9b09c81a349114cf9be45a
-F ext/misc/spellfix.c 76578f2c56ceaa23d22032338d90db79c68490fb
+F ext/misc/spellfix.c 3548c433f473c2054e080b6382771636fcaa2c4c
 F ext/misc/totype.c 4a167594e791abeed95e0a8db028822b5e8fe512
 F ext/misc/vfslog.c fe40fab5c077a40477f7e5eba994309ecac6cc95
 F ext/misc/vtshim.c babb0dc2bf116029e3e7c9a618b8a1377045303e
@@ -157,38 +157,38 @@ F mptest/mptest.c 499a74af4be293b7c1c7c3d40f332b67227dd739
 F mptest/multiwrite01.test 499ad0310da8dff8e8f98d2e272fc2a8aa741b2e
 F spec.template 86a4a43b99ebb3e75e6b9a735d5fd293a24e90ca
 F sqlite.pc.in 42b7bf0d02e08b9e77734a47798d1a55a9e0716b
-F sqlite3.1 6be1ad09113570e1fc8dcaff84c9b0b337db5ffc
+F sqlite3.1 3d8b83c91651f53472ca17599dae3457b8b89494
 F sqlite3.pc.in 48fed132e7cb71ab676105d2a4dc77127d8c1f3a
-F src/alter.c 2af0330bb1b601af7a7789bf7229675fd772a083
+F src/alter.c d5348d0f86a5fc8fb3987727402f023953c021cf
 F src/analyze.c 581d5c18ce89c6f45d4dca65914d0de5b4dad41f
 F src/attach.c 3801129015ef59d76bf23c95ef9b0069d18a0c52
 F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
 F src/backup.c a729e63cf5cd1829507cb7b8e89f99b95141bb53
 F src/bitvec.c 19a4ba637bd85f8f63fc8c9bae5ade9fb05ec1cb
 F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
-F src/btree.c 02e1a4e71d8fc37e9fd5216c15d989d148a77c87
+F src/btree.c 7b2c3cd16deedff7f4904f2e871e7b77328b9872
 F src/btree.h a61ddebc78c66795a2b93181321a116746302cc9
 F src/btreeInt.h f038e818bfadf75afbd09819ed93c26a333d39e0
-F src/build.c 7e6c275ab1731510d6f793d0f88373ab3e858e69
+F src/build.c 40c38ec8f10835cf68879cb12e7c00e32b8edf78
 F src/callback.c 174e3c8656bc29f91d710ab61550d16eea34be98
 F src/complete.c dc1d136c0feee03c2f7550bafc0d29075e36deac
 F src/ctime.c 77779efbe78dd678d84bfb4fc2e87b6b6ad8dccd
 F src/date.c 593c744b2623971e45affd0bde347631bdfa4625
-F src/delete.c 91e1321021db5dc266360531b8b6550009d771ff
-F src/expr.c 8c7e482bc8f7982333f046851a610ccdb8a1ba94
+F src/delete.c 6765a421f08adbedc5d52d21760ec6dbe5123fd3
+F src/expr.c fabda9e9320e3284c2a35cdc558313d9e80ce92a
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
 F src/fkey.c 2ab0f5384b70594468ef3ac5c7ed8ca24bfd17d5
-F src/func.c 6325ac2ec10833ccf4d5c36d323709221d37ea19
+F src/func.c f4499b39d66b71825514334ce67b32ff14bd19f5
 F src/global.c 1d7bb7ea8254ae6a68ed9bfaf65fcb3d1690b486
-F src/hash.c ac3470bbf1ca4ae4e306a8ecb0fdf1731810ffe4
+F src/hash.c d139319967164f139c8d1bb8a11b14db9c4ba3cd
 F src/hash.h 8890a25af81fb85a9ad7790d32eedab4b994da22
 F src/hwtime.h d32741c8f4df852c7d959236615444e2b1063b08
-F src/insert.c a4450f0c46a9f221622e6551ab0953b03c4f8ee8
+F src/insert.c b50cb5a51edb0d6e1a99e04b232b8632a54e522a
 F src/journal.c b4124532212b6952f42eb2c12fa3c25701d8ba8d
 F src/legacy.c 0df0b1550b9cc1f58229644735e317ac89131f12
 F src/lempar.c cdf0a000315332fc9b50b62f3b5e22e080a0952b
 F src/loadext.c 867c7b330b740c6c917af9956b13b81d0a048303
-F src/main.c 4a05a9706579c7649d7eebb0094586728eb53fcb
+F src/main.c 07225af6a00be0b7f34ac52e60f99cf5cbb2a475
 F src/malloc.c 0203ebce9152c6a0e5de520140b8ba65187350be
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c c0c990fcaddff810ea277b4fb5d9138603dd5d4b
@@ -205,38 +205,38 @@ F src/notify.c 976dd0f6171d4588e89e874fcc765e92914b6d30
 F src/os.c 1b147e4cf7cc39e618115c14a086aed44bc91ace
 F src/os.h 4a46270a64e9193af4a0aaa3bc2c66dc07c29b3f
 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
-F src/os_unix.c 3a4dcb554d3c915075766162f28c3fd4cdb75968
-F src/os_win.c 1b21af72c5fa6f9e519a5fcab33e80d182b1aedb
+F src/os_unix.c f3ed0e406cbf9c820565b2118232d0796346130f
+F src/os_win.c d4284f003445054a26689f1264b1b9bf7261bd1b
 F src/pager.c efa923693e958696eee69b205a20bfbc402c8480
 F src/pager.h ffd5607f7b3e4590b415b007a4382f693334d428
-F src/parse.y 475896cb883bbf4782e98abda42efbbdcbdb75f5
-F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
+F src/parse.y bd51bc17cbfe7549adb4ca3747b1c3d384645065
+F src/pcache.c d8eafac28290d4bb80332005435db44991d07fc2
 F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
-F src/pcache1.c 57fee9a9a617218f5037afbbe49b09da65bde56b
+F src/pcache1.c 102e6f5a2fbc646154463eb856d1fd716867b64c
 F src/pragma.c ed409ce4104cf4d9de6ead40ace70974f124853b
 F src/prepare.c 677521ab7132615a8a26107a1d1c3132f44ae337
 F src/printf.c 85d07756e45d7496d19439dcae3e6e9e0090f269
 F src/random.c d10c1f85b6709ca97278428fd5db5bbb9c74eece
 F src/resolve.c 7eda9097b29fcf3d2b42fdc17d1de672134e09b6
 F src/rowset.c 64655f1a627c9c212d9ab497899e7424a34222e0
-F src/select.c f6d84f3a109d3e43d38089da6a4f131a5ce4c6ef
-F src/shell.c 24722d24d4ea8ca93db35e44db7308de786767ca
+F src/select.c 47d93e6f0b58000e2093e7b489bdca778884f82a
+F src/shell.c 7dedf7367ee49050b0366bf8dbc8ec2bd15b42c7
 F src/sqlite.h.in eed7f7d66a60daaa7b4a597dcd9bad87aad9611b
 F src/sqlite3.rc 11094cc6a157a028b301a9f06b3d03089ea37c3e
 F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
-F src/sqliteInt.h 87a90ad4818ac5d68d3463eb7fe3ed96e5209b25
+F src/sqliteInt.h fdab572b3567d587cf3096e3ca5dabcedda3fa66
 F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
 F src/status.c 7ac05a5c7017d0b9f0b4bcd701228b784f987158
 F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
-F src/tclsqlite.c 46073db71011b6542fde1f234c56a076d5ff23f9
-F src/test1.c db16ba651453b15001c7f2838c446284dde4ecaf
+F src/tclsqlite.c 21ca0043d7c48cde5dabed5c1116eee1be692f62
+F src/test1.c 2401eee14a4309a7cfe2aeb2f30ad517a1d9c299
 F src/test2.c 7355101c085304b90024f2261e056cdff13c6c35
 F src/test3.c 1c0e5d6f080b8e33c1ce8b3078e7013fdbcd560c
 F src/test4.c 9b32d22f5f150abe23c1830e2057c4037c45b3df
 F src/test5.c a6d1ac55ac054d0b2b8f37b5e655b6c92645a013
 F src/test6.c 41cacf3b0dd180823919bf9e1fbab287c9266723
 F src/test7.c 72b732baa5642f795655ba1126ea032af46ecfd2
-F src/test8.c c7aab1d9fbbf54fc33d43b73aa24aa55f9eaf534
+F src/test8.c 54ccd7b1df5062f0ecbf50a8f7b618f8b1f13b20
 F src/test9.c bea1e8cf52aa93695487badedd6e1886c321ea60
 F src/test_async.c 21e11293a2f72080eda70e1124e9102044531cd8
 F src/test_autoext.c dea8a01a7153b9adc97bd26161e4226329546e12
@@ -276,25 +276,25 @@ F src/test_vfstrace.c 3a0ab304682fecbceb689e7d9b904211fde11d78
 F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
 F src/tokenize.c 6da2de6e12218ccb0aea5184b56727d011f4bee7
 F src/trigger.c 5c1c0b899ac0ce284763dcb8fdbaa38ecf15ef98
-F src/update.c c2706a6eb232a96345c35b7e1e75a188e26812bb
+F src/update.c a7df6fffce6bfedc578fda6136dd33e34a63f8ee
 F src/utf.c 6fc6c88d50448c469c5c196acf21617a24f90269
-F src/util.c e71f19b272f05c8695cf747b4bac1732685f9e5c
+F src/util.c 15ac2627f548f5481d0d7e6c4eb67be673027695
 F src/vacuum.c 3728d74919d4fb1356f9e9a13e27773db60b7179
-F src/vdbe.c dede894c2990329f8bc5a70da7de44ce8c3c6bf5
+F src/vdbe.c e7bb0587ad4866c0db5fe3b83104c4df8f93d19f
 F src/vdbe.h e6c4c610fcabad4fa80ebb1efc6822a9367e2b26
-F src/vdbeInt.h 42db251e9f863401ff847b90d5fe1614c89a6a56
+F src/vdbeInt.h b5d62957a408c4bea649484008e5f98335b09e97
 F src/vdbeapi.c ce4e68ea4842cc6081046f533d088dcf01d247ad
-F src/vdbeaux.c 9f4bfc52672acbb0bb4493d6a03603dc5a595ac1
-F src/vdbeblob.c bc40f98f256f0b34116d6a44b114da4a81a15d33
-F src/vdbemem.c 0e69351b2c6ff7d8b638688c0ae336a26befa6b2
+F src/vdbeaux.c 3fd95b226330e1d50aedb40d750effe726ebb3fb
+F src/vdbeblob.c 9542e116c1db5ed813977581d506c176e117c0ec
+F src/vdbemem.c c0bcc02d6816ab4218ac0f94b63c8ee78a0f739f
 F src/vdbesort.c 9d83601f9d6243fe70dd0169a2820c5ddfd48147
 F src/vdbetrace.c 6f52bc0c51e144b7efdcfb2a8f771167a8816767
 F src/vtab.c 21b932841e51ebd7d075e2d0ad1415dce8d2d5fd
 F src/wal.c 7dc3966ef98b74422267e7e6e46e07ff6c6eb1b4
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
 F src/walker.c 11edb74d587bc87b33ca96a5173e3ec1b8389e45
-F src/where.c 67ae3b5e97ecff36c70cb61ccc7d74cf228f1596
-F src/whereInt.h 96a75c61f1d2b9d4a8e4bb17d89deb0cf7cba358
+F src/where.c 8c2aada8b44140382406cf07b84ff2f6127cb39e
+F src/whereInt.h 921f935af8b684ffb49705610bda7284db1db138
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/aggnested.test 45c0201e28045ad38a530b5a144b73cd4aa2cfd6
@@ -364,15 +364,15 @@ F test/btreefault.test c2bcb542685eea44621275cfedbd8a13f65201e3
 F test/busy.test 76b4887f8b9160ba903c1ac22e8ff406ad6ae2f0
 F test/cache.test 13bc046b26210471ca6f2889aceb1ea52dc717de
 F test/capi2.test 011c16da245fdc0106a2785035de6b242c05e738
-F test/capi3.test 56ab450125ead38846cbae7e5b6a216686c3cffa
+F test/capi3.test 6cdd49656bd62a296924f4d2fcfd05cd2a298369
 F test/capi3b.test efb2b9cfd127efa84433cd7a2d72ce0454ae0dc4
-F test/capi3c.test 93d24621c9ff84da9da060f30431e0453db1cdb0
+F test/capi3c.test a21869e4d50d5dbb7e566e328fc0bc7c2efa6a32
 F test/capi3d.test 6d0fc0a86d73f42dd19a7d8b7761ab9bc02277d0
 F test/capi3e.test ad90088b18b0367125ff2d4b5400153fd2f99aab
 F test/cast.test 4c275cbdc8202d6f9c54a3596701719868ac7dc3
 F test/check.test 5831ddb6f2c687782eaf2e1a07b6e17f24c4f763
 F test/close.test 340bd24cc58b16c6bc01967402755027c37eb815
-F test/closure01.test dbb28f1ea9eeaf0a53ec5bc0fed352e479def8c7
+F test/closure01.test b1703ba40639cfc9b295cf478d70739415eec6a4
 F test/coalesce.test cee0dccb9fbd2d494b77234bccf9dc6c6786eb91
 F test/collate1.test 73b91005f264b7c403e2d63a6708d150679ac99a
 F test/collate2.test 9aaa410a00734e48bcb27f3872617d6f69b2a621
@@ -406,7 +406,7 @@ F test/corruptD.test b3c205fac7952b1de645ce44bb02335cd9e3e040
 F test/corruptE.test 193b4ca4e927e77c1d5f4f56203ddc998432a7ee
 F test/corruptF.test be9fde98e4c93648f1ba52b74e5318edc8f59fe4
 F test/corruptG.test c150f156dace653c00a121ad0f5772a0568c41ba
-F test/corruptH.test 0a247f3dc8a8f3578db5f639d86c6bb4d520207f
+F test/corruptH.test 9d8186f6f8751efdfd445d8546fd98f073499039
 F test/count.test 42a251178e32f617eda33f76236a7f79825a50b5
 F test/coveridxscan.test cdb47d01acc4a634a34fd25abe85189e0d0f1e62
 F test/crash.test fb9dc4a02dcba30d4aa5c2c226f98b220b2b959f
@@ -439,13 +439,13 @@ F test/e_delete.test d5186e2f5478b659f16a2c8b66c09892823e542a
 F test/e_droptrigger.test 3cd080807622c13e5bbb61fc9a57bd7754da2412
 F test/e_dropview.test 0c9f7f60989164a70a67a9d9c26d1083bc808306
 F test/e_expr.test 5c71d183fbf519a4769fd2e2124afdc70b5b1f42
-F test/e_fkey.test d83a04478bb9c02d2c513518548a69f818869f41
+F test/e_fkey.test 630597377549af579d34faaf64c6959a5a68ef76
 F test/e_fts3.test 5c02288842e4f941896fd44afdef564dd5fc1459
 F test/e_insert.test 1e44f84d2abe44d66e4fbf198be4b20e3cc724a0
 F test/e_reindex.test 396b7b4f0a66863b4e95116a67d93b227193e589
 F test/e_resolve.test dcce9308fb13b934ce29591105d031d3e14fbba6
-F test/e_select.test d3226cb94fae4af3f198e68e71f655e106d0be47
-F test/e_select2.test 22c660a7becf0712c95e1ca1b2d9e716a1261460
+F test/e_select.test 52692ff3849541e828ad4661fe3773a9b8711763
+F test/e_select2.test aceb80ab927d46fba5ce7586ebabf23e2bb0604f
 F test/e_update.test 312cb8f5ccfe41515a6bb092f8ea562a9bd54d52
 F test/e_uri.test a2c92d80093a7efdcfbb11093651cbea87097b6b
 F test/e_vacuum.test 5bfbdc21b65c0abf24398d0ba31dc88d93ca77a9
@@ -700,8 +700,8 @@ F test/misc3.test cf3dda47d5dda3e53fc5804a100d3c82be736c9d
 F test/misc4.test 9c078510fbfff05a9869a0b6d8b86a623ad2c4f6
 F test/misc5.test 528468b26d03303b1f047146e5eefc941b9069f5
 F test/misc6.test 953cc693924d88e6117aeba16f46f0bf5abede91
-F test/misc7.test 1265eb98c2e22a446a13fdef754118b272716684
-F test/misuse.test ba4fb5d1a6101d1c171ea38b3c613d0661c83054
+F test/misc7.test edd0b63e2ee29a256900b0514f6fff27e19e9bb2
+F test/misuse.test 3c34719944ba045cc6c188a4852ba04680728912
 F test/mmap1.test 93d167b328255cbe6679fe1e1a23be1b1197d07b
 F test/mmap2.test 9d6dd9ddb4ad2379f29cc78f38ce1e63ed418022
 F test/mmap3.test c92273e16eb8d23c1d55c9815b446bb72ef0512e
@@ -728,8 +728,8 @@ F test/oserror.test 50417780d0e0d7cd23cf12a8277bb44024765df3
 F test/pager1.test 1acbdb14c5952a72dd43129cabdbf69aaa3ed1fa
 F test/pager2.test 67b8f40ae98112bcdba1f2b2d03ea83266418c71
 F test/pager3.test 3856d9c80839be0668efee1b74811b1b7f7fc95f
-F test/pager4.test b40ecb4cc7dff957ee7916e41ab21d1ed702a642
-F test/pagerfault.test 7285379906ab2f1108b8e82bbdf2d386cc8ff3ff
+F test/pager4.test a122e9e6925d5b23b31e3dfef8c6a44bbf19590e
+F test/pagerfault.test ae9ee0db5a30aecda9db8290ce3dd12e5f7bbaa1
 F test/pagerfault2.test caf4c7facb914fd3b03a17b31ae2b180c8d6ca1f
 F test/pagerfault3.test 1003fcda009bf48a8e22a516e193b6ef0dd1bbd8
 F test/pageropt.test 6b8f6a123a5572c195ad4ae40f2987007923bbd6
@@ -737,11 +737,11 @@ F test/pagesize.test 1dd51367e752e742f58e861e65ed7390603827a0
 F test/pcache.test b09104b03160aca0d968d99e8cd2c5b1921a993d
 F test/pcache2.test a83efe2dec0d392f814bfc998def1d1833942025
 F test/percentile.test b98fc868d71eb5619d42a1702e9ab91718cbed54
-F test/permutations.test af3278cbea3a19e025d5169be8193ff48dc3f862
+F test/permutations.test 40add071ba71aefe1c04f5845308cf46f7de8d04
 F test/pragma.test e882183ecd21d064cec5c7aaea174fbd36293429
 F test/pragma2.test aea7b3d82c76034a2df2b38a13745172ddc0bc13
 F test/printf.test ec9870c4dce8686a37818e0bf1aba6e6a1863552
-F test/printf2.test 414fcba6d6c10e0a5e58efd213811e5ead4635a0
+F test/printf2.test bed79b4c3e5da08ba88ad637c0bf62586843cfb1
 F test/progress.test a282973d1d17f08071bc58a77d6b80f2a81c354d
 F test/ptrchng.test ef1aa72d6cf35a2bbd0869a649b744e9d84977fc
 F test/queryonly.test 5f653159e0f552f0552d43259890c1089391dcca
@@ -783,7 +783,7 @@ F test/select3.test 2ce595f8fb8e2ac10071d3b4e424cadd4634a054
 F test/select4.test 00179be44e531fe04c1c3f15df216439dff2519d
 F test/select5.test e758b8ef94f69b111df4cb819008856655dcd535
 F test/select6.test e76bd10a56988f15726c097a5d5a7966fe82d3b2
-F test/select7.test dad6f00f0d49728a879d6eb6451d4752db0b0abe
+F test/select7.test 7fd2ef598cfabb6b9ff6ac13973b91d0527df49d
 F test/select8.test 391de11bdd52339c30580dabbbbe97e3e9a3c79d
 F test/select9.test aebc2bb0c3bc44606125033cbcaac2c8d1f33a95
 F test/selectA.test 99cf21df033b93033ea4f34aba14a500f48f04fe
@@ -825,7 +825,7 @@ F test/speed4.test abc0ad3399dcf9703abed2fff8705e4f8e416715
 F test/speed4p.explain 6b5f104ebeb34a038b2f714150f51d01143e59aa
 F test/speed4p.test 0e51908951677de5a969b723e03a27a1c45db38b
 F test/speedtest1.c 7130d2cb6db45baa553a4ab2f715116c71c2d9f4
-F test/spellfix.test 8c40b169b104086d8795781f670ba3c786d6d8be
+F test/spellfix.test 61309f5efbec53603b3f86457d34a504f80abafe
 F test/sqllimits1.test b1aae27cc98eceb845e7f7adf918561256e31298
 F test/stat.test 76fd746b85459e812a0193410fb599f0531f22de
 F test/stmt.test 25d64e3dbf9a3ce89558667d7f39d966fe2a71b9
@@ -844,7 +844,7 @@ F test/tclsqlite.test 37a61c2da7e3bfe3b8c1a2867199f6b860df5d43
 F test/tempdb.test 19d0f66e2e3eeffd68661a11c83ba5e6ace9128c
 F test/temptable.test d2c9b87a54147161bcd1822e30c1d1cd891e5b30
 F test/temptrigger.test 8ec228b0db5d7ebc4ee9b458fc28cb9e7873f5e1
-F test/tester.tcl 08e9f317afe60d398fa900993503ecaef3295bad
+F test/tester.tcl 9bd04481b8b0ef1f2049ad01f28e175ee9a14f7b
 F test/thread001.test 9f22fd3525a307ff42a326b6bc7b0465be1745a5
 F test/thread002.test e630504f8a06c00bf8bbe68528774dd96aeb2e58
 F test/thread003.test ee4c9efc3b86a6a2767516a37bd64251272560a7
@@ -1092,7 +1092,7 @@ F test/wild001.test bca33f499866f04c24510d74baf1e578d4e44b1c
 F test/win32heap.test ea19770974795cff26e11575e12d422dbd16893c
 F test/win32lock.test 7a6bd73a5dcdee39b5bb93e92395e1773a194361
 F test/win32longpath.test 169c75a3b2e43481f4a62122510210c67b08f26d
-F test/with1.test 97166cc72de5327bbae782aece707c45ee40e41b
+F test/with1.test ce15d69d34a2576b0e47d78c244d1ba2a31679d1
 F test/with2.test 2fe78fcd8deef2a0f9cfc49bfc755911d0b3fd64
 F test/withM.test e97f2a8c506ab3ea9eab94e6f6072f6cc924c991
 F test/without_rowid1.test aaa26da19d543cd8d3d2d0e686dfa255556c15c8
@@ -1127,12 +1127,12 @@ F tool/mksqlite3h.tcl ba24038056f51fde07c0079c41885ab85e2cff12
 F tool/mksqlite3internalh.tcl 3dca7bb5374cee003379b8cbac73714f610ef795
 F tool/mkvsix.tcl 6477fb9dab838b7eea1eed50658ff1cda04850b5
 F tool/offsets.c fe4262fdfa378e8f5499a42136d17bf3b98f6091
-F tool/omittest.tcl 4665982e95a6e5c1bd806cf7bc3dea95be422d77
+F tool/omittest.tcl 34d7ac01fe4fd18e3637f64abe12c40eca0f6b97
 F tool/opcodeDoc.awk b3a2a3d5d3075b8bd90b7afe24283efdd586659c
 F tool/pagesig.c ff0ca355fd3c2398e933da5e22439bbff89b803b
 F tool/restore_jrnl.tcl 6957a34f8f1f0f8285e07536225ec3b292a9024a
 F tool/rollback-test.c 9fc98427d1e23e84429d7e6d07d9094fbdec65a5
-F tool/showdb.c 525ecc443578647703051308ad50a93de6ba2c4b
+F tool/showdb.c 1f3fe634d6f690b8d39ab1b9fd34583d468921e1
 F tool/showjournal.c b62cecaab86a4053d944c276bb5232e4d17ece02
 F tool/showwal.c 3f7f7da5ec0cba51b1449a75f700493377da57b5
 F tool/soak1.tcl 8d407956e1a45b485a8e072470a3e629a27037fe
@@ -1152,7 +1152,7 @@ F tool/vdbe-compress.tcl 0cf56e9263a152b84da86e75a5c0cdcdb7a47891
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P 37b343b01841b338954ddfa9b76d92aa50037aec
-R f6fa1b44c6431db29f11962241b14895
+P 1ec0e9dd4b26d9f597adc8e062317d4866c5a6a6
+R dbad771d6a0c64046f81724e16a6d61c
 U drh
-Z a802989c6813792648a40d2b5db727ef
+Z bb5cd7d324cd2ad57b192424d498539f
@@ -1 +1 @@
-1945484e6b9769c1943f750f5b09860417fb190a
+a522f364a6b8ca6f69c353b30609a2166f6e94cf
@@ -2,7 +2,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH SQLITE3 1 "Mon Apr 15 23:49:17 2002"
+.TH SQLITE3 1 "Mon Jan 31 11:14:00 2014"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -49,7 +49,7 @@ a table named "memos" and insert a couple of records into that table:
 $ 
 .B sqlite3 mydata.db
 .br
-SQLite version 3.1.3
+SQLite version 3.8.3
 .br
 Enter ".help" for instructions
 .br
@@ -108,15 +108,24 @@ sqlite>
 .B .help
 .nf
 .cc |
+.backup ?DB? FILE      Backup DB (default "main") to FILE
+.bail ON|OFF           Stop after hitting an error.  Default OFF
 .databases             List names and files of attached databases
 .dump ?TABLE? ...      Dump the database in an SQL text format
+                         If TABLE specified, only dump tables matching
+                         LIKE pattern TABLE.
 .echo ON|OFF           Turn command echo on or off
 .exit                  Exit this program
-.explain ON|OFF        Turn output mode suitable for EXPLAIN on or off.
+.explain ?ON|OFF?      Turn output mode suitable for EXPLAIN on or off.
+                         With no args, it turns EXPLAIN on.
 .header(s) ON|OFF      Turn display of headers on or off
 .help                  Show this message
 .import FILE TABLE     Import data from FILE into TABLE
-.indices TABLE         Show names of all indices on TABLE
+.indices ?TABLE?       Show names of all indices
+                         If TABLE specified, only show indices for tables
+                         matching LIKE pattern TABLE.
+.load FILE ?ENTRY?     Load an extension library
+.log FILE|off          Turn logging on or off.  FILE can be stderr/stdout
 .mode MODE ?TABLE?     Set output mode where MODE is one of:
                         csv      Comma-separated values
                         column   Left-aligned columns.  (See .width)
@@ -126,46 +135,76 @@ sqlite>
                         list     Values delimited by .separator string
                         tabs     Tab-separated values
                         tcl      TCL list elements
-.nullvalue STRING      Print STRING in place of NULL values
+.nullvalue STRING      Use STRING in place of NULL values
+.open ?FILENAME?       Close existing database and reopen FILENAME
 .output FILENAME       Send output to FILENAME
 .output stdout         Send output to the screen
+.print STRING...       Print literal STRING
 .prompt MAIN CONTINUE  Replace the standard prompts
 .quit                  Exit this program
 .read FILENAME         Execute SQL in FILENAME
+.restore ?DB? FILE     Restore content of DB (default "main") from FILE
 .schema ?TABLE?        Show the CREATE statements
+                         If TABLE specified, only show tables matching
+                         LIKE pattern TABLE.
 .separator STRING      Change separator used by output mode and .import
 .show                  Show the current values for various settings
-.tables ?PATTERN?      List names of tables matching a LIKE pattern
+.stats ON|OFF          Turn stats on or off
+.tables ?TABLE?        List names of tables
+                         If TABLE specified, only list tables matching
+                         LIKE pattern TABLE.
 .timeout MS            Try opening locked tables for MS milliseconds
-.width NUM NUM ...     Set column widths for "column" mode
+.trace FILE|off        Output each SQL statement as it is run
+.vfsname ?AUX?         Print the name of the VFS stack
+.width NUM1 NUM2 ...   Set column widths for "column" mode
+.timer ON|OFF          Turn the CPU timer measurement on or off
 sqlite>
 |cc .
 .sp
 .fi
-
 .SH OPTIONS
 .B sqlite3
 has the following options:
 .TP
-.BI \-init\ file
-Read and execute commands from
-.I file
-, which can contain a mix of SQL statements and meta-commands.
+.B \-bail
+Stop after hitting an error.
 .TP
-.B \-echo
-Print commands before execution.
-.TP
-.B \-[no]header
-Turn headers on or off.
+.B \-batch
+Force batch I/O.
 .TP
 .B \-column
 Query results will be displayed in a table like form, using
 whitespace characters to separate the columns and align the
 output.
 .TP
+.BI \-cmd\  command
+run
+.I command
+before reading stdin
+.TP
+.B \-csv
+Set output mode to CSV (comma separated values).
+.TP
+.B \-echo
+Print commands before execution.
+.TP
+.BI \-init\  file
+Read and execute commands from
+.I file
+, which can contain a mix of SQL statements and meta-commands.
+.TP
+.B \-[no]header
+Turn headers on or off.
+.TP
+.B \-help
+Show help on options and exit.
+.TP
 .B \-html
 Query results will be output as simple HTML tables.
 .TP
+.B \-interactive
+Force interactive I/O.
+.TP
 .B \-line
 Query results will be displayed with one value per line, rows
 separated by a blank line.  Designed to be easily parsed by
@@ -175,18 +214,28 @@ scripts or other programs
 Query results will be displayed with the separator (|, by default)
 character between each field value.  The default.
 .TP
-.BI \-separator\  separator
-Set output field separator.  Default is '|'.
+.BI \-mmap\  N
+Set default mmap size to
+.I N
+\.
 .TP
 .BI \-nullvalue\  string
 Set string used to represent NULL values.  Default is ''
 (empty string).
 .TP
+.BI \-separator\  separator
+Set output field separator.  Default is '|'.
+.TP
+.B \-stats
+Print memory stats before each finalize.
+.TP
 .B \-version
 Show SQLite version.
 .TP
-.B \-help
-Show help on options and exit.
+.BI \-vfs\  name
+Use
+.I name
+as the default VFS.


 .SH INIT FILE
@@ -222,8 +271,9 @@ o All other command line options are processed.
 .SH SEE ALSO
 http://www.sqlite.org/
 .br
-The sqlite-doc package
+The sqlite3-doc package.
 .SH AUTHOR
 This manual page was originally written by Andreas Rottmann
 <rotty@debian.org>, for the Debian GNU/Linux system (but may be used
-by others).   It was subsequently revised by Bill Bumgarner <bbum@mac.com>.
+by others). It was subsequently revised by Bill Bumgarner <bbum@mac.com> and
+further updated by Laszlo Boszormenyi <gcs@debian.hu> .
@@ -469,7 +469,7 @@ void sqlite3AlterRenameTable(
  }
 #endif

-  /* Begin a transaction and code the VerifyCookie for database iDb. 
+  /* Begin a transaction for database iDb. 
  ** Then modify the schema cookie (since the ALTER TABLE modifies the
  ** schema). Open a statement transaction if the table is a virtual
  ** table.
@@ -4777,6 +4777,15 @@ int sqlite3BtreeEof(BtCursor *pCur){
 ** successful then set *pRes=0.  If the cursor
 ** was already pointing to the last entry in the database before
 ** this routine was called, then set *pRes=1.
+**
+** The calling function will set *pRes to 0 or 1.  The initial *pRes value
+** will be 1 if the cursor being stepped corresponds to an SQL index and
+** if this routine could have been skipped if that SQL index had been
+** a unique index.  Otherwise the caller will have set *pRes to zero.
+** Zero is the common case. The btree implementation is free to use the
+** initial *pRes value as a hint to improve performance, but the current
+** SQLite btree implementation does not. (Note that the comdb2 btree
+** implementation does use this hint, however.)
 */
 int sqlite3BtreeNext(BtCursor *pCur, int *pRes){
  int rc;
@@ -4785,6 +4794,7 @@ int sqlite3BtreeNext(BtCursor *pCur, int *pRes){

  assert( cursorHoldsMutex(pCur) );
  assert( pRes!=0 );
+  assert( *pRes==0 || *pRes==1 );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  if( pCur->eState!=CURSOR_VALID ){
    rc = restoreCursorPosition(pCur);
@@ -4863,6 +4873,15 @@ int sqlite3BtreeNext(BtCursor *pCur, int *pRes){
 ** successful then set *pRes=0.  If the cursor
 ** was already pointing to the first entry in the database before
 ** this routine was called, then set *pRes=1.
+**
+** The calling function will set *pRes to 0 or 1.  The initial *pRes value
+** will be 1 if the cursor being stepped corresponds to an SQL index and
+** if this routine could have been skipped if that SQL index had been
+** a unique index.  Otherwise the caller will have set *pRes to zero.
+** Zero is the common case. The btree implementation is free to use the
+** initial *pRes value as a hint to improve performance, but the current
+** SQLite btree implementation does not. (Note that the comdb2 btree
+** implementation does use this hint, however.)
 */
 int sqlite3BtreePrevious(BtCursor *pCur, int *pRes){
  int rc;
@@ -4870,6 +4889,7 @@ int sqlite3BtreePrevious(BtCursor *pCur, int *pRes){

  assert( cursorHoldsMutex(pCur) );
  assert( pRes!=0 );
+  assert( *pRes==0 || *pRes==1 );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  pCur->atLast = 0;
  if( pCur->eState!=CURSOR_VALID ){
@@ -7096,7 +7116,7 @@ int sqlite3BtreeDelete(BtCursor *pCur){
  ** sub-tree headed by the child page of the cell being deleted. This makes
  ** balancing the tree following the delete operation easier.  */
  if( !pPage->leaf ){
-    int notUsed;
+    int notUsed = 0;
    rc = sqlite3BtreePrevious(pCur, &notUsed);
    if( rc ) return rc;
  }
@@ -156,13 +156,14 @@ void sqlite3FinishCoding(Parse *pParse){
      for(iDb=0, mask=1; iDb<db->nDb; mask<<=1, iDb++){
        if( (mask & pParse->cookieMask)==0 ) continue;
        sqlite3VdbeUsesBtree(v, iDb);
-        sqlite3VdbeAddOp2(v,OP_Transaction, iDb, (mask & pParse->writeMask)!=0);
-        if( db->init.busy==0 ){
-          assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
-          sqlite3VdbeAddOp3(v, OP_VerifyCookie,
-                            iDb, pParse->cookieValue[iDb],
-                            db->aDb[iDb].pSchema->iGeneration);
-        }
+        sqlite3VdbeAddOp4Int(v,
+          OP_Transaction,                    /* Opcode */
+          iDb,                               /* P1 */
+          (mask & pParse->writeMask)!=0,     /* P2 */
+          pParse->cookieValue[iDb],          /* P3 */
+          db->aDb[iDb].pSchema->iGeneration  /* P4 */
+        );
+        if( db->init.busy==0 ) sqlite3VdbeChangeP5(v, 1);
      }
 #ifndef SQLITE_OMIT_VIRTUALTABLE
      for(i=0; i<pParse->nVtabLock; i++){
@@ -97,10 +97,8 @@ void sqlite3MaterializeView(
  SrcList *pFrom;
  sqlite3 *db = pParse->db;
  int iDb = sqlite3SchemaToIndex(db, pView->pSchema);
-
  pWhere = sqlite3ExprDup(db, pWhere, 0);
  pFrom = sqlite3SrcListAppend(db, 0, 0, 0);
-
  if( pFrom ){
    assert( pFrom->nSrc==1 );
    pFrom->a[0].zName = sqlite3DbStrDup(db, pView->zName);
@@ -108,10 +106,7 @@ void sqlite3MaterializeView(
    assert( pFrom->a[0].pOn==0 );
    assert( pFrom->a[0].pUsing==0 );
  }
-
  pSel = sqlite3SelectNew(pParse, 0, pFrom, pWhere, 0, 0, 0, 0, 0, 0);
-  if( pSel ) pSel->selFlags |= SF_Materialize;
-
  sqlite3SelectDestInit(&dest, SRT_EphemTab, iCur);
  sqlite3Select(pParse, pSel, &dest);
  sqlite3SelectDelete(db, pSel);
@@ -636,7 +631,9 @@ void sqlite3GenerateRowDelete(
    ** used by any BEFORE and AFTER triggers that exist.  */
    sqlite3VdbeAddOp2(v, OP_Copy, iPk, iOld);
    for(iCol=0; iCol<pTab->nCol; iCol++){
-      if( mask==0xffffffff || mask&(1<<iCol) ){
+      testcase( mask!=0xffffffff && iCol==31 );
+      testcase( mask!=0xffffffff && iCol==32 );
+      if( mask==0xffffffff || (iCol<=31 && (mask & MASKBIT32(iCol))!=0) ){
        sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, iCol, iOld+iCol+1);
      }
    }
@@ -1064,6 +1064,7 @@ Select *sqlite3SelectDup(sqlite3 *db, Select *p, int flags){
  pNew->addrOpenEphm[0] = -1;
  pNew->addrOpenEphm[1] = -1;
  pNew->addrOpenEphm[2] = -1;
+  pNew->nSelectRow = p->nSelectRow;
  pNew->pWith = withDup(db, p->pWith);
  return pNew;
 }
@@ -1583,12 +1584,10 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
    pExpr = p->pEList->a[0].pExpr;
    iCol = (i16)pExpr->iColumn;
   
-    /* Code an OP_VerifyCookie and OP_TableLock for <table>. */
-    if( ALWAYS(pTab->pSchema) ){
-      iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
-      sqlite3CodeVerifySchema(pParse, iDb);
-      sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName);
-    }
+    /* Code an OP_Transaction and OP_TableLock for <table>. */
+    iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
+    sqlite3CodeVerifySchema(pParse, iDb);
+    sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName);

    /* This function is only called from two places. In both cases the vdbe
    ** has already been allocated. So assume sqlite3GetVdbe() is always
@@ -1764,7 +1763,6 @@ int sqlite3CodeSubselect(
      */
      pExpr->iTable = pParse->nTab++;
      addr = sqlite3VdbeAddOp2(v, OP_OpenEphemeral, pExpr->iTable, !isRowid);
-      if( rMayHaveNull==0 ) sqlite3VdbeChangeP5(v, BTREE_UNORDERED);
      pKeyInfo = isRowid ? 0 : sqlite3KeyInfoAlloc(pParse->db, 1, 1);

      if( ExprHasProperty(pExpr, EP_xIsSelect) ){
@@ -2687,7 +2685,7 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
      FuncDef *pDef;         /* The function definition object */
      int nId;               /* Length of the function name in bytes */
      const char *zId;       /* The function name */
-      int constMask = 0;     /* Mask of function arguments that are constant */
+      u32 constMask = 0;     /* Mask of function arguments that are constant */
      int i;                 /* Loop counter */
      u8 enc = ENC(db);      /* The text encoding used by this database */
      CollSeq *pColl = 0;    /* A collating sequence */
@@ -2738,7 +2736,8 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){

      for(i=0; i<nFarg; i++){
        if( i<32 && sqlite3ExprIsConstant(pFarg->a[i].pExpr) ){
-          constMask |= (1<<i);
+          testcase( i==31 );
+          constMask |= MASKBIT32(i);
        }
        if( (pDef->funcFlags & SQLITE_FUNC_NEEDCOLL)!=0 && !pColl ){
          pColl = sqlite3ExprCollSeq(pParse, pFarg->a[i].pExpr);
@@ -137,7 +137,7 @@ static void absFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
    case SQLITE_INTEGER: {
      i64 iVal = sqlite3_value_int64(argv[0]);
      if( iVal<0 ){
-        if( (iVal<<1)==0 ){
+        if( iVal==SMALLEST_INT64 ){
          /* IMP: R-31676-45509 If X is the integer -9223372036854775808
          ** then abs(X) throws an integer overflow error since there is no
          ** equivalent positive 64-bit two complement value. */
@@ -53,7 +53,7 @@ void sqlite3HashClear(Hash *pH){
 ** The hashing function.
 */
 static unsigned int strHash(const char *z, int nKey){
-  int h = 0;
+  unsigned int h = 0;
  assert( nKey>=0 );
  while( nKey > 0  ){
    h = (h<<3) ^ h ^ sqlite3UpperToLower[(unsigned char)*z++];
@@ -349,17 +349,13 @@ void sqlite3AutoincrementEnd(Parse *pParse){
 **                       co-routine.  Run the co-routine to its next breakpoint
 **                       by calling "OP_Yield $X" where $X is pDest->iSDParm.
 **
-**   pDest->iSDParm+1    The register holding the "completed" flag for the
-**                       co-routine. This register is 0 if the previous Yield
-**                       generated a new result row, or 1 if the subquery
-**                       has completed.  If the Yield is called again
-**                       after this register becomes 1, then the VDBE will
-**                       halt with an SQLITE_INTERNAL error.
-**
 **   pDest->iSdst        First result register.
 **
 **   pDest->nSdst        Number of result registers.
 **
+** At EOF the first result register will be marked as "undefined" so that
+** the caller can know when to stop reading results.
+**
 ** This routine handles all of the register allocation and fills in the
 ** pDest structure appropriately.
 **
@@ -370,7 +366,6 @@ void sqlite3AutoincrementEnd(Parse *pParse){
 ** reg[pDest->iSdst+pDest->nSdst-1]:
 **
 **         X <- A
-**         EOF <- 0
 **         goto B
 **      A: setup for the SELECT
 **         loop rows in the SELECT
@@ -378,16 +373,13 @@ void sqlite3AutoincrementEnd(Parse *pParse){
 **           yield X
 **         end loop
 **         cleanup after the SELECT
-**         EOF <- 1
-**         yield X
-**         halt-error
+**         end co-routine R
 **      B:
 **
 ** To use this subroutine, the caller generates code as follows:
 **
 **         [ Co-routine generated by this subroutine, shown above ]
-**      S: yield X
-**         if EOF goto E
+**      S: yield X, at EOF goto E
 **         if skip this row, goto C
 **         if terminate loop, goto E
 **         deal with this row
@@ -396,31 +388,21 @@ void sqlite3AutoincrementEnd(Parse *pParse){
 */
 int sqlite3CodeCoroutine(Parse *pParse, Select *pSelect, SelectDest *pDest){
  int regYield;       /* Register holding co-routine entry-point */
-  int regEof;         /* Register holding co-routine completion flag */
  int addrTop;        /* Top of the co-routine */
-  int j1;             /* Jump instruction */
  int rc;             /* Result code */
  Vdbe *v;            /* VDBE under construction */

  regYield = ++pParse->nMem;
-  regEof = ++pParse->nMem;
  v = sqlite3GetVdbe(pParse);
-  addrTop = sqlite3VdbeCurrentAddr(v);
-  sqlite3VdbeAddOp2(v, OP_Integer, addrTop+2, regYield); /* X <- A */
-  VdbeComment((v, "Co-routine entry point"));
-  sqlite3VdbeAddOp2(v, OP_Integer, 0, regEof);           /* EOF <- 0 */
-  VdbeComment((v, "Co-routine completion flag"));
+  addrTop = sqlite3VdbeCurrentAddr(v) + 1;
+  sqlite3VdbeAddOp3(v, OP_InitCoroutine, regYield, 0, addrTop);
  sqlite3SelectDestInit(pDest, SRT_Coroutine, regYield);
-  j1 = sqlite3VdbeAddOp2(v, OP_Goto, 0, 0);
  rc = sqlite3Select(pParse, pSelect, pDest);
  assert( pParse->nErr==0 || rc );
  if( pParse->db->mallocFailed && rc==SQLITE_OK ) rc = SQLITE_NOMEM;
  if( rc ) return rc;
-  sqlite3VdbeAddOp2(v, OP_Integer, 1, regEof);            /* EOF <- 1 */
-  sqlite3VdbeAddOp1(v, OP_Yield, regYield);   /* yield X */
-  sqlite3VdbeAddOp2(v, OP_Halt, SQLITE_INTERNAL, OE_Abort);
-  VdbeComment((v, "End of coroutine"));
-  sqlite3VdbeJumpHere(v, j1);                             /* label B: */
+  sqlite3VdbeAddOp1(v, OP_EndCoroutine, regYield);
+  sqlite3VdbeJumpHere(v, addrTop - 1);                       /* label B: */
  return rc;
 }

@@ -488,7 +470,6 @@ static int xferOptimization(
 ** and the SELECT clause does not read from <table> at any time.
 ** The generated code follows this template:
 **
-**         EOF <- 0
 **         X <- A
 **         goto B
 **      A: setup for the SELECT
@@ -497,12 +478,9 @@ static int xferOptimization(
 **           yield X
 **         end loop
 **         cleanup after the SELECT
-**         EOF <- 1
-**         yield X
-**         goto A
+**         end-coroutine X
 **      B: open write cursor to <table> and its indices
-**      C: yield X
-**         if EOF goto D
+**      C: yield X, at EOF goto D
 **         insert the select result into <table> from R..R+n
 **         goto C
 **      D: cleanup
@@ -513,7 +491,6 @@ static int xferOptimization(
 ** we have to use a intermediate table to store the results of
 ** the select.  The template is like this:
 **
-**         EOF <- 0
 **         X <- A
 **         goto B
 **      A: setup for the SELECT
@@ -522,12 +499,9 @@ static int xferOptimization(
 **           yield X
 **         end loop
 **         cleanup after the SELECT
-**         EOF <- 1
-**         yield X
-**         halt-error
+**         end co-routine R
 **      B: open temp table
-**      L: yield X
-**         if EOF goto M
+**      L: yield X, at EOF goto M
 **         insert row from R..R+n into temp table
 **         goto L
 **      M: open write cursor to <table> and its indices
@@ -576,7 +550,6 @@ void sqlite3Insert(
  int regIns;           /* Block of regs holding rowid+data being inserted */
  int regRowid;         /* registers holding insert rowid */
  int regData;          /* register holding first column to insert */
-  int regEof = 0;       /* Register recording end of SELECT data */
  int *aRegIdx = 0;     /* One register allocated to each index */

 #ifndef SQLITE_OMIT_TRIGGER
@@ -689,7 +662,6 @@ void sqlite3Insert(
    int rc = sqlite3CodeCoroutine(pParse, pSelect, &dest);
    if( rc ) goto insert_cleanup;

-    regEof = dest.iSDParm + 1;
    regFromSelect = dest.iSdst;
    assert( pSelect->pEList );
    nColumn = pSelect->pEList->nExpr;
@@ -714,8 +686,7 @@ void sqlite3Insert(
      ** here is from the 4th template:
      **
      **      B: open temp table
-      **      L: yield X
-      **         if EOF goto M
+      **      L: yield X, goto M at EOF
      **         insert row from R..R+n into temp table
      **         goto L
      **      M: ...
@@ -723,19 +694,17 @@ void sqlite3Insert(
      int regRec;          /* Register to hold packed record */
      int regTempRowid;    /* Register to hold temp table ROWID */
      int addrTop;         /* Label "L" */
-      int addrIf;          /* Address of jump to M */

      srcTab = pParse->nTab++;
      regRec = sqlite3GetTempReg(pParse);
      regTempRowid = sqlite3GetTempReg(pParse);
      sqlite3VdbeAddOp2(v, OP_OpenEphemeral, srcTab, nColumn);
      addrTop = sqlite3VdbeAddOp1(v, OP_Yield, dest.iSDParm);
-      addrIf = sqlite3VdbeAddOp1(v, OP_If, regEof);
      sqlite3VdbeAddOp3(v, OP_MakeRecord, regFromSelect, nColumn, regRec);
      sqlite3VdbeAddOp2(v, OP_NewRowid, srcTab, regTempRowid);
      sqlite3VdbeAddOp3(v, OP_Insert, srcTab, regRec, regTempRowid);
      sqlite3VdbeAddOp2(v, OP_Goto, 0, addrTop);
-      sqlite3VdbeJumpHere(v, addrIf);
+      sqlite3VdbeJumpHere(v, addrTop);
      sqlite3ReleaseTempReg(pParse, regRec);
      sqlite3ReleaseTempReg(pParse, regTempRowid);
    }
@@ -847,7 +816,7 @@ void sqlite3Insert(
    /* This block codes the top of loop only.  The complete loop is the
    ** following pseudocode (template 4):
    **
-    **         rewind temp table
+    **         rewind temp table, if empty goto D
    **      C: loop over rows of intermediate table
    **           transfer values form intermediate table into <table>
    **         end loop
@@ -859,14 +828,12 @@ void sqlite3Insert(
    /* This block codes the top of loop only.  The complete loop is the
    ** following pseudocode (template 3):
    **
-    **      C: yield X
-    **         if EOF goto D
+    **      C: yield X, at EOF goto D
    **         insert the select result into <table> from R..R+n
    **         goto C
    **      D: ...
    */
-    addrCont = sqlite3VdbeAddOp1(v, OP_Yield, dest.iSDParm);
-    addrInsTop = sqlite3VdbeAddOp1(v, OP_If, regEof);
+    addrInsTop = addrCont = sqlite3VdbeAddOp1(v, OP_Yield, dest.iSDParm);
  }

  /* Allocate registers for holding the rowid of the new row,
@@ -3303,7 +3303,7 @@ int sqlite3_test_control(int op, ...){
    ** that demonstrat invariants on well-formed database files.
    */
    case SQLITE_TESTCTRL_NEVER_CORRUPT: {
-      sqlite3Config.neverCorrupt = va_arg(ap, int);
+      sqlite3GlobalConfig.neverCorrupt = va_arg(ap, int);
      break;
    }

@@ -4097,7 +4097,7 @@ static int unixShmSystemLock(
 #ifdef SQLITE_DEBUG
  { u16 mask;
  OSTRACE(("SHM-LOCK "));
-  mask = ofst>31 ? 0xffffffff : (1<<(ofst+n)) - (1<<ofst);
+  mask = ofst>31 ? 0xffff : (1<<(ofst+n)) - (1<<ofst);
  if( rc==SQLITE_OK ){
    if( lockType==F_UNLCK ){
      OSTRACE(("unlock %d ok", ofst));
@@ -3201,7 +3201,7 @@ static int winDeviceCharacteristics(sqlite3_file *id){
 ** During sqlite3_os_init() we do a GetSystemInfo()
 ** to get the granularity size.
 */
-SYSTEM_INFO winSysInfo;
+static SYSTEM_INFO winSysInfo;

 #ifndef SQLITE_OMIT_WAL

@@ -397,7 +397,7 @@ cmd ::= DROP VIEW ifexists(E) fullname(X). {
 //////////////////////// The SELECT statement /////////////////////////////////
 //
 cmd ::= select(X).  {
-  SelectDest dest = {SRT_Output, 0, 0, 0, 0};
+  SelectDest dest = {SRT_Output, 0, 0, 0, 0, 0};
  sqlite3Select(pParse, X, &dest);
  sqlite3ExplainBegin(pParse->pVdbe);
  sqlite3ExplainSelect(pParse->pVdbe, X);
@@ -23,7 +23,8 @@ struct PCache {
  int szCache;                        /* Configured cache size */
  int szPage;                         /* Size of every page in this cache */
  int szExtra;                        /* Size of extra space for each page */
-  int bPurgeable;                     /* True if pages are on backing store */
+  u8 bPurgeable;                      /* True if pages are on backing store */
+  u8 eCreate;                         /* eCreate value for for xFetch() */
  int (*xStress)(void*,PgHdr*);       /* Call to try make a page clean */
  void *pStress;                      /* Argument to xStress */
  sqlite3_pcache *pCache;             /* Pluggable cache module */
@@ -90,6 +91,10 @@ static void pcacheRemoveFromDirtyList(PgHdr *pPage){
  }else{
    assert( pPage==p->pDirty );
    p->pDirty = pPage->pDirtyNext;
+    if( p->pDirty==0 && p->bPurgeable ){
+      assert( p->eCreate==1 );
+      p->eCreate = 2;
+    }
  }
  pPage->pDirtyNext = 0;
  pPage->pDirtyPrev = 0;
@@ -110,6 +115,9 @@ static void pcacheAddToDirtyList(PgHdr *pPage){
  if( pPage->pDirtyNext ){
    assert( pPage->pDirtyNext->pDirtyPrev==0 );
    pPage->pDirtyNext->pDirtyPrev = pPage;
+  }else if( p->bPurgeable ){
+    assert( p->eCreate==2 );
+    p->eCreate = 1;
  }
  p->pDirty = pPage;
  if( !p->pDirtyTail ){
@@ -179,6 +187,7 @@ void sqlite3PcacheOpen(
  p->szPage = szPage;
  p->szExtra = szExtra;
  p->bPurgeable = bPurgeable;
+  p->eCreate = 2;
  p->xStress = xStress;
  p->pStress = pStress;
  p->szCache = 100;
@@ -218,7 +227,7 @@ int sqlite3PcacheFetch(
  int createFlag,       /* If true, create page if it does not exist already */
  PgHdr **ppPage        /* Write the page here */
 ){
-  sqlite3_pcache_page *pPage = 0;
+  sqlite3_pcache_page *pPage;
  PgHdr *pPgHdr = 0;
  int eCreate;

@@ -229,8 +238,12 @@ int sqlite3PcacheFetch(
  /* If the pluggable cache (sqlite3_pcache*) has not been allocated,
  ** allocate it now.
  */
-  if( !pCache->pCache && createFlag ){
+  if( !pCache->pCache ){
    sqlite3_pcache *p;
+    if( !createFlag ){
+      *ppPage = 0;
+      return SQLITE_OK;
+    }
    p = sqlite3GlobalConfig.pcache2.xCreate(
        pCache->szPage, pCache->szExtra + sizeof(PgHdr), pCache->bPurgeable
    );
@@ -241,11 +254,16 @@ int sqlite3PcacheFetch(
    pCache->pCache = p;
  }

-  eCreate = createFlag * (1 + (!pCache->bPurgeable || !pCache->pDirty));
-  if( pCache->pCache ){
-    pPage = sqlite3GlobalConfig.pcache2.xFetch(pCache->pCache, pgno, eCreate);
-  }
-
+  /* eCreate defines what to do if the page does not exist.
+  **    0     Do not allocate a new page.  (createFlag==0)
+  **    1     Allocate a new page if doing so is inexpensive.
+  **          (createFlag==1 AND bPurgeable AND pDirty)
+  **    2     Allocate a new page even it doing so is difficult.
+  **          (createFlag==1 AND !(bPurgeable AND pDirty)
+  */
+  eCreate = createFlag==0 ? 0 : pCache->eCreate;
+  assert( (createFlag*(1+(!pCache->bPurgeable||!pCache->pDirty)))==eCreate );
+  pPage = sqlite3GlobalConfig.pcache2.xFetch(pCache->pCache, pgno, eCreate);
  if( !pPage && eCreate==1 ){
    PgHdr *pPg;

@@ -720,6 +720,7 @@ static sqlite3_pcache_page *pcache1Fetch(
  PGroup *pGroup;
  PgHdr1 *pPage = 0;

+  assert( offsetof(PgHdr1,page)==0 );
  assert( pCache->bPurgeable || createFlag!=1 );
  assert( pCache->bPurgeable || pCache->nMin==0 );
  assert( pCache->bPurgeable==0 || pCache->nMin==10 );
@@ -825,7 +826,7 @@ fetch_out:
    pCache->iMaxKey = iKey;
  }
  pcache1LeaveMutex(pGroup);
-  return &pPage->page;
+  return (sqlite3_pcache_page*)pPage;
 }


@@ -765,12 +765,8 @@ static void selectInnerLoop(
    }
 #endif /* #ifndef SQLITE_OMIT_SUBQUERY */

-    /* Send the data to the callback function or to a subroutine.  In the
-    ** case of a subroutine, the subroutine itself is responsible for
-    ** popping the data from the stack.
-    */
-    case SRT_Coroutine:
-    case SRT_Output: {
+    case SRT_Coroutine:       /* Send data to a co-routine */
+    case SRT_Output: {        /* Return the results */
      testcase( eDest==SRT_Coroutine );
      testcase( eDest==SRT_Output );
      if( pOrderBy ){
@@ -814,6 +810,7 @@ static void selectInnerLoop(
        ** been added */
        addrTest = sqlite3VdbeAddOp4Int(v, OP_Found, iParm+1, 0, r3, 0);
        sqlite3VdbeAddOp2(v, OP_IdxInsert, iParm+1, r3);
+        sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT);
      }
      for(i=0; i<nKey; i++){
        sqlite3VdbeAddOp2(v, OP_SCopy,
@@ -1724,7 +1721,44 @@ static CollSeq *multiSelectCollSeq(Parse *pParse, Select *p, int iCol){
  }
  return pRet;
 }
-#endif /* SQLITE_OMIT_COMPOUND_SELECT */
+
+/*
+** The select statement passed as the second parameter is a compound SELECT
+** with an ORDER BY clause. This function allocates and returns a KeyInfo
+** structure suitable for implementing the ORDER BY.
+**
+** Space to hold the KeyInfo structure is obtained from malloc. The calling
+** function is responsible for ensuring that this structure is eventually
+** freed.
+*/
+static KeyInfo *multiSelectOrderByKeyInfo(Parse *pParse, Select *p, int nExtra){
+  ExprList *pOrderBy = p->pOrderBy;
+  int nOrderBy = p->pOrderBy->nExpr;
+  sqlite3 *db = pParse->db;
+  KeyInfo *pRet = sqlite3KeyInfoAlloc(db, nOrderBy+nExtra, 1);
+  if( pRet ){
+    int i;
+    for(i=0; i<nOrderBy; i++){
+      struct ExprList_item *pItem = &pOrderBy->a[i];
+      Expr *pTerm = pItem->pExpr;
+      CollSeq *pColl;
+
+      if( pTerm->flags & EP_Collate ){
+        pColl = sqlite3ExprCollSeq(pParse, pTerm);
+      }else{
+        pColl = multiSelectCollSeq(pParse, p, pItem->u.x.iOrderByCol-1);
+        if( pColl==0 ) pColl = db->pDfltColl;
+        pOrderBy->a[i].pExpr =
+          sqlite3ExprAddCollateString(pParse, pTerm, pColl->zName);
+      }
+      assert( sqlite3KeyInfoIsWriteable(pRet) );
+      pRet->aColl[i] = pColl;
+      pRet->aSortOrder[i] = pOrderBy->a[i].sortOrder;
+    }
+  }
+
+  return pRet;
+}

 #ifndef SQLITE_OMIT_CTE
 /*
@@ -1774,7 +1808,7 @@ static void generateWithRecursiveQuery(
  Select *pSetup = p->pPrior;   /* The setup query */
  int addrTop;                  /* Top of the loop */
  int addrCont, addrBreak;      /* CONTINUE and BREAK addresses */
-  int iCurrent;                 /* The Current table */
+  int iCurrent = 0;             /* The Current table */
  int regCurrent;               /* Register holding Current table */
  int iQueue;                   /* The Queue table */
  int iDistinct = 0;            /* To ensure unique results if UNION */
@@ -1798,6 +1832,7 @@ static void generateWithRecursiveQuery(
  regOffset = p->iOffset;
  p->pLimit = p->pOffset = 0;
  p->iLimit = p->iOffset = 0;
+  pOrderBy = p->pOrderBy;

  /* Locate the cursor number of the Current table */
  for(i=0; ALWAYS(i<pSrc->nSrc); i++){
@@ -1807,10 +1842,6 @@ static void generateWithRecursiveQuery(
    }
  }

-  /* Detach the ORDER BY clause from the compound SELECT */
-  pOrderBy = p->pOrderBy;
-  p->pOrderBy = 0;
-
  /* Allocate cursors numbers for Queue and Distinct.  The cursor number for
  ** the Distinct table must be exactly one greater than Queue in order
  ** for the SRT_DistTable and SRT_DistQueue destinations to work. */
@@ -1827,7 +1858,7 @@ static void generateWithRecursiveQuery(
  regCurrent = ++pParse->nMem;
  sqlite3VdbeAddOp3(v, OP_OpenPseudo, iCurrent, regCurrent, nCol);
  if( pOrderBy ){
-    KeyInfo *pKeyInfo = keyInfoFromExprList(pParse, pOrderBy, 1);
+    KeyInfo *pKeyInfo = multiSelectOrderByKeyInfo(pParse, p, 1);
    sqlite3VdbeAddOp4(v, OP_OpenEphemeral, iQueue, pOrderBy->nExpr+2, 0,
                      (char*)pKeyInfo, P4_KEYINFO);
    destQueue.pOrderBy = pOrderBy;
@@ -1840,6 +1871,9 @@ static void generateWithRecursiveQuery(
    p->selFlags |= SF_UsesEphemeral;
  }

+  /* Detach the ORDER BY clause from the compound SELECT */
+  p->pOrderBy = 0;
+
  /* Store the results of the setup-query in Queue. */
  rc = sqlite3Select(pParse, pSetup, &destQueue);
  if( rc ) goto end_of_recursive_query;
@@ -1882,7 +1916,7 @@ end_of_recursive_query:
  p->pOffset = pOffset;
  return;
 }
-#endif
+#endif /* SQLITE_OMIT_CTE */

 /* Forward references */
 static int multiSelectOrderBy(
@@ -1892,7 +1926,6 @@ static int multiSelectOrderBy(
 );


-#ifndef SQLITE_OMIT_COMPOUND_SELECT
 /*
 ** This routine is called to process a compound query form from
 ** two or more separate queries using UNION, UNION ALL, EXCEPT, or
@@ -1936,8 +1969,8 @@ static int multiSelect(
  Select *pDelete = 0;  /* Chain of simple selects to delete */
  sqlite3 *db;          /* Database connection */
 #ifndef SQLITE_OMIT_EXPLAIN
-  int iSub1;            /* EQP id of left-hand query */
-  int iSub2;            /* EQP id of right-hand query */
+  int iSub1 = 0;        /* EQP id of left-hand query */
+  int iSub2 = 0;        /* EQP id of right-hand query */
 #endif

  /* Make sure there is no ORDER BY or LIMIT clause on prior SELECTs.  Only
@@ -2535,9 +2568,7 @@ static int multiSelectOrderBy(
  SelectDest destA;     /* Destination for coroutine A */
  SelectDest destB;     /* Destination for coroutine B */
  int regAddrA;         /* Address register for select-A coroutine */
-  int regEofA;          /* Flag to indicate when select-A is complete */
  int regAddrB;         /* Address register for select-B coroutine */
-  int regEofB;          /* Flag to indicate when select-B is complete */
  int addrSelectA;      /* Address of the select-A coroutine */
  int addrSelectB;      /* Address of the select-B coroutine */
  int regOutA;          /* Address register for the output-A subroutine */
@@ -2545,6 +2576,7 @@ static int multiSelectOrderBy(
  int addrOutA;         /* Address of the output-A subroutine */
  int addrOutB = 0;     /* Address of the output-B subroutine */
  int addrEofA;         /* Address of the select-A-exhausted subroutine */
+  int addrEofA_noB;     /* Alternate addrEofA if B is uninitialized */
  int addrEofB;         /* Address of the select-B-exhausted subroutine */
  int addrAltB;         /* Address of the A<B subroutine */
  int addrAeqB;         /* Address of the A==B subroutine */
@@ -2624,24 +2656,7 @@ static int multiSelectOrderBy(
          && pItem->u.x.iOrderByCol<=p->pEList->nExpr );
      aPermute[i] = pItem->u.x.iOrderByCol - 1;
    }
-    pKeyMerge = sqlite3KeyInfoAlloc(db, nOrderBy, 1);
-    if( pKeyMerge ){
-      for(i=0; i<nOrderBy; i++){
-        CollSeq *pColl;
-        Expr *pTerm = pOrderBy->a[i].pExpr;
-        if( pTerm->flags & EP_Collate ){
-          pColl = sqlite3ExprCollSeq(pParse, pTerm);
-        }else{
-          pColl = multiSelectCollSeq(pParse, p, aPermute[i]);
-          if( pColl==0 ) pColl = db->pDfltColl;
-          pOrderBy->a[i].pExpr =
-             sqlite3ExprAddCollateString(pParse, pTerm, pColl->zName);
-        }
-        assert( sqlite3KeyInfoIsWriteable(pKeyMerge) );
-        pKeyMerge->aColl[i] = pColl;
-        pKeyMerge->aSortOrder[i] = pOrderBy->a[i].sortOrder;
-      }
-    }
+    pKeyMerge = multiSelectOrderByKeyInfo(pParse, p, 1);
  }else{
    pKeyMerge = 0;
  }
@@ -2698,37 +2713,30 @@ static int multiSelectOrderBy(
  p->pOffset = 0;

  regAddrA = ++pParse->nMem;
-  regEofA = ++pParse->nMem;
  regAddrB = ++pParse->nMem;
-  regEofB = ++pParse->nMem;
  regOutA = ++pParse->nMem;
  regOutB = ++pParse->nMem;
  sqlite3SelectDestInit(&destA, SRT_Coroutine, regAddrA);
  sqlite3SelectDestInit(&destB, SRT_Coroutine, regAddrB);

-  /* Jump past the various subroutines and coroutines to the main
-  ** merge loop
-  */
-  j1 = sqlite3VdbeAddOp0(v, OP_Goto);
-  addrSelectA = sqlite3VdbeCurrentAddr(v);
-
-
  /* Generate a coroutine to evaluate the SELECT statement to the
  ** left of the compound operator - the "A" select.
  */
-  VdbeNoopComment((v, "Begin coroutine for left SELECT"));
+  addrSelectA = sqlite3VdbeCurrentAddr(v) + 1;
+  j1 = sqlite3VdbeAddOp3(v, OP_InitCoroutine, regAddrA, 0, addrSelectA);
+  VdbeComment((v, "left SELECT"));
  pPrior->iLimit = regLimitA;
  explainSetInteger(iSub1, pParse->iNextSelectId);
  sqlite3Select(pParse, pPrior, &destA);
-  sqlite3VdbeAddOp2(v, OP_Integer, 1, regEofA);
-  sqlite3VdbeAddOp1(v, OP_Yield, regAddrA);
-  VdbeNoopComment((v, "End coroutine for left SELECT"));
+  sqlite3VdbeAddOp1(v, OP_EndCoroutine, regAddrA);
+  sqlite3VdbeJumpHere(v, j1);

  /* Generate a coroutine to evaluate the SELECT statement on 
  ** the right - the "B" select
  */
-  addrSelectB = sqlite3VdbeCurrentAddr(v);
-  VdbeNoopComment((v, "Begin coroutine for right SELECT"));
+  addrSelectB = sqlite3VdbeCurrentAddr(v) + 1;
+  j1 = sqlite3VdbeAddOp3(v, OP_InitCoroutine, regAddrB, 0, addrSelectB);
+  VdbeComment((v, "right SELECT"));
  savedLimit = p->iLimit;
  savedOffset = p->iOffset;
  p->iLimit = regLimitB;
@@ -2737,9 +2745,7 @@ static int multiSelectOrderBy(
  sqlite3Select(pParse, p, &destB);
  p->iLimit = savedLimit;
  p->iOffset = savedOffset;
-  sqlite3VdbeAddOp2(v, OP_Integer, 1, regEofB);
-  sqlite3VdbeAddOp1(v, OP_Yield, regAddrB);
-  VdbeNoopComment((v, "End coroutine for right SELECT"));
+  sqlite3VdbeAddOp1(v, OP_EndCoroutine, regAddrB);

  /* Generate a subroutine that outputs the current row of the A
  ** select as the next output row of the compound select.
@@ -2763,13 +2769,12 @@ static int multiSelectOrderBy(
  /* Generate a subroutine to run when the results from select A
  ** are exhausted and only data in select B remains.
  */
-  VdbeNoopComment((v, "eof-A subroutine"));
  if( op==TK_EXCEPT || op==TK_INTERSECT ){
-    addrEofA = sqlite3VdbeAddOp2(v, OP_Goto, 0, labelEnd);
+    addrEofA_noB = addrEofA = labelEnd;
  }else{  
-    addrEofA = sqlite3VdbeAddOp2(v, OP_If, regEofB, labelEnd);
-    sqlite3VdbeAddOp2(v, OP_Gosub, regOutB, addrOutB);
-    sqlite3VdbeAddOp1(v, OP_Yield, regAddrB);
+    VdbeNoopComment((v, "eof-A subroutine"));
+    addrEofA = sqlite3VdbeAddOp2(v, OP_Gosub, regOutB, addrOutB);
+    addrEofA_noB = sqlite3VdbeAddOp2(v, OP_Yield, regAddrB, labelEnd);
    sqlite3VdbeAddOp2(v, OP_Goto, 0, addrEofA);
    p->nSelectRow += pPrior->nSelectRow;
  }
@@ -2782,9 +2787,8 @@ static int multiSelectOrderBy(
    if( p->nSelectRow > pPrior->nSelectRow ) p->nSelectRow = pPrior->nSelectRow;
  }else{  
    VdbeNoopComment((v, "eof-B subroutine"));
-    addrEofB = sqlite3VdbeAddOp2(v, OP_If, regEofA, labelEnd);
-    sqlite3VdbeAddOp2(v, OP_Gosub, regOutA, addrOutA);
-    sqlite3VdbeAddOp1(v, OP_Yield, regAddrA);
+    addrEofB = sqlite3VdbeAddOp2(v, OP_Gosub, regOutA, addrOutA);
+    sqlite3VdbeAddOp2(v, OP_Yield, regAddrA, labelEnd);
    sqlite3VdbeAddOp2(v, OP_Goto, 0, addrEofB);
  }

@@ -2792,8 +2796,7 @@ static int multiSelectOrderBy(
  */
  VdbeNoopComment((v, "A-lt-B subroutine"));
  addrAltB = sqlite3VdbeAddOp2(v, OP_Gosub, regOutA, addrOutA);
-  sqlite3VdbeAddOp1(v, OP_Yield, regAddrA);
-  sqlite3VdbeAddOp2(v, OP_If, regEofA, addrEofA);
+  sqlite3VdbeAddOp2(v, OP_Yield, regAddrA, addrEofA);
  sqlite3VdbeAddOp2(v, OP_Goto, 0, labelCmpr);

  /* Generate code to handle the case of A==B
@@ -2806,8 +2809,7 @@ static int multiSelectOrderBy(
  }else{
    VdbeNoopComment((v, "A-eq-B subroutine"));
    addrAeqB =
-    sqlite3VdbeAddOp1(v, OP_Yield, regAddrA);
-    sqlite3VdbeAddOp2(v, OP_If, regEofA, addrEofA);
+    sqlite3VdbeAddOp2(v, OP_Yield, regAddrA, addrEofA);
    sqlite3VdbeAddOp2(v, OP_Goto, 0, labelCmpr);
  }

@@ -2818,19 +2820,14 @@ static int multiSelectOrderBy(
  if( op==TK_ALL || op==TK_UNION ){
    sqlite3VdbeAddOp2(v, OP_Gosub, regOutB, addrOutB);
  }
-  sqlite3VdbeAddOp1(v, OP_Yield, regAddrB);
-  sqlite3VdbeAddOp2(v, OP_If, regEofB, addrEofB);
+  sqlite3VdbeAddOp2(v, OP_Yield, regAddrB, addrEofB);
  sqlite3VdbeAddOp2(v, OP_Goto, 0, labelCmpr);

  /* This code runs once to initialize everything.
  */
  sqlite3VdbeJumpHere(v, j1);
-  sqlite3VdbeAddOp2(v, OP_Integer, 0, regEofA);
-  sqlite3VdbeAddOp2(v, OP_Integer, 0, regEofB);
-  sqlite3VdbeAddOp2(v, OP_Gosub, regAddrA, addrSelectA);
-  sqlite3VdbeAddOp2(v, OP_Gosub, regAddrB, addrSelectB);
-  sqlite3VdbeAddOp2(v, OP_If, regEofA, addrEofA);
-  sqlite3VdbeAddOp2(v, OP_If, regEofB, addrEofB);
+  sqlite3VdbeAddOp2(v, OP_Yield, regAddrA, addrEofA_noB);
+  sqlite3VdbeAddOp2(v, OP_Yield, regAddrB, addrEofB);

  /* Implement the main merge loop
  */
@@ -4532,16 +4529,14 @@ int sqlite3Select(
        p->selFlags |= SF_Aggregate;
      }
      i = -1;
-    }else if( pTabList->nSrc==1 && (p->selFlags & SF_Materialize)==0
-      && OptimizationEnabled(db, SQLITE_SubqCoroutine)
+    }else if( pTabList->nSrc==1
+           && OptimizationEnabled(db, SQLITE_SubqCoroutine)
    ){
      /* Implement a co-routine that will return a single row of the result
      ** set on each invocation.
      */
      int addrTop;
-      int addrEof;
      pItem->regReturn = ++pParse->nMem;
-      addrEof = ++pParse->nMem;
      /* Before coding the OP_Goto to jump to the start of the main routine,
      ** ensure that the jump to the verify-schema routine has already
      ** been coded. Otherwise, the verify-schema would likely be coded as 
@@ -4554,10 +4549,8 @@ int sqlite3Select(
      sqlite3VdbeAddOp0(v, OP_Goto);
      addrTop = sqlite3VdbeAddOp1(v, OP_OpenPseudo, pItem->iCursor);
      sqlite3VdbeChangeP5(v, 1);
-      VdbeComment((v, "coroutine for %s", pItem->pTab->zName));
+      VdbeComment((v, "coroutine %s", pItem->pTab->zName));
      pItem->addrFillSub = addrTop;
-      sqlite3VdbeAddOp2(v, OP_Integer, 0, addrEof);
-      sqlite3VdbeChangeP5(v, 1);
      sqlite3SelectDestInit(&dest, SRT_Coroutine, pItem->regReturn);
      explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
      sqlite3Select(pParse, pSub, &dest);
@@ -4565,9 +4558,7 @@ int sqlite3Select(
      pItem->viaCoroutine = 1;
      sqlite3VdbeChangeP2(v, addrTop, dest.iSdst);
      sqlite3VdbeChangeP3(v, addrTop, dest.nSdst);
-      sqlite3VdbeAddOp2(v, OP_Integer, 1, addrEof);
-      sqlite3VdbeAddOp1(v, OP_Yield, pItem->regReturn);
-      VdbeComment((v, "end %s", pItem->pTab->zName));
+      sqlite3VdbeAddOp1(v, OP_EndCoroutine, pItem->regReturn);
      sqlite3VdbeJumpHere(v, addrTop-1);
      sqlite3ClearTempRegCache(pParse);
    }else{
@@ -1543,6 +1543,7 @@ static int run_schema_dump_query(
 static char zHelp[] =
  ".backup ?DB? FILE      Backup DB (default \"main\") to FILE\n"
  ".bail ON|OFF           Stop after hitting an error.  Default OFF\n"
+  ".clone NEWDB           Clone data into NEWDB from the existing database\n"
  ".databases             List names and files of attached databases\n"
  ".dump ?TABLE? ...      Dump the database in an SQL text format\n"
  "                         If TABLE specified, only dump tables matching\n"
@@ -1896,6 +1897,219 @@ static char *csv_read_one_field(CSVReader *p){
  return p->z;
 }

+/*
+** Try to transfer data for table zTable.  If an error is seen while
+** moving forward, try to go backwards.  The backwards movement won't
+** work for WITHOUT ROWID tables.
+*/
+static void tryToCloneData(
+  struct callback_data *p,
+  sqlite3 *newDb,
+  const char *zTable
+){
+  sqlite3_stmt *pQuery = 0; 
+  sqlite3_stmt *pInsert = 0;
+  char *zQuery = 0;
+  char *zInsert = 0;
+  int rc;
+  int i, j, n;
+  int nTable = (int)strlen(zTable);
+  int k = 0;
+  int cnt = 0;
+  const int spinRate = 10000;
+
+  zQuery = sqlite3_mprintf("SELECT * FROM \"%w\"", zTable);
+  rc = sqlite3_prepare_v2(p->db, zQuery, -1, &pQuery, 0);
+  if( rc ){
+    fprintf(stderr, "Error %d: %s on [%s]\n",
+            sqlite3_extended_errcode(p->db), sqlite3_errmsg(p->db),
+            zQuery);
+    goto end_data_xfer;
+  }
+  n = sqlite3_column_count(pQuery);
+  zInsert = sqlite3_malloc(200 + nTable + n*3);
+  if( zInsert==0 ){
+    fprintf(stderr, "out of memory\n");
+    goto end_data_xfer;
+  }
+  sqlite3_snprintf(200+nTable,zInsert,
+                   "INSERT OR IGNORE INTO \"%s\" VALUES(?", zTable);
+  i = (int)strlen(zInsert);
+  for(j=1; j<n; j++){
+    memcpy(zInsert+i, ",?", 2);
+    i += 2;
+  }
+  memcpy(zInsert+i, ");", 3);
+  rc = sqlite3_prepare_v2(newDb, zInsert, -1, &pInsert, 0);
+  if( rc ){
+    fprintf(stderr, "Error %d: %s on [%s]\n",
+            sqlite3_extended_errcode(newDb), sqlite3_errmsg(newDb),
+            zQuery);
+    goto end_data_xfer;
+  }
+  for(k=0; k<2; k++){
+    while( (rc = sqlite3_step(pQuery))==SQLITE_ROW ){
+      for(i=0; i<n; i++){
+        switch( sqlite3_column_type(pQuery, i) ){
+          case SQLITE_NULL: {
+            sqlite3_bind_null(pInsert, i+1);
+            break;
+          }
+          case SQLITE_INTEGER: {
+            sqlite3_bind_int64(pInsert, i+1, sqlite3_column_int64(pQuery,i));
+            break;
+          }
+          case SQLITE_FLOAT: {
+            sqlite3_bind_double(pInsert, i+1, sqlite3_column_double(pQuery,i));
+            break;
+          }
+          case SQLITE_TEXT: {
+            sqlite3_bind_text(pInsert, i+1,
+                             (const char*)sqlite3_column_text(pQuery,i),
+                             -1, SQLITE_STATIC);
+            break;
+          }
+          case SQLITE_BLOB: {
+            sqlite3_bind_blob(pInsert, i+1, sqlite3_column_blob(pQuery,i),
+                                            sqlite3_column_bytes(pQuery,i),
+                                            SQLITE_STATIC);
+            break;
+          }
+        }
+      } /* End for */
+      rc = sqlite3_step(pInsert);
+      if( rc!=SQLITE_OK && rc!=SQLITE_ROW && rc!=SQLITE_DONE ){
+        fprintf(stderr, "Error %d: %s\n", sqlite3_extended_errcode(newDb),
+                        sqlite3_errmsg(newDb));
+      }
+      sqlite3_reset(pInsert);
+      cnt++;
+      if( (cnt%spinRate)==0 ){
+        printf("%c\b", "|/-\\"[(cnt/spinRate)%4]);
+        fflush(stdout);
+      }
+    } /* End while */
+    if( rc==SQLITE_DONE ) break;
+    sqlite3_finalize(pQuery);
+    sqlite3_free(zQuery);
+    zQuery = sqlite3_mprintf("SELECT * FROM \"%w\" ORDER BY rowid DESC;",
+                             zTable);
+    rc = sqlite3_prepare_v2(p->db, zQuery, -1, &pQuery, 0);
+    if( rc ){
+      fprintf(stderr, "Warning: cannot step \"%s\" backwards", zTable);
+      break;
+    }
+  } /* End for(k=0...) */
+
+end_data_xfer:
+  sqlite3_finalize(pQuery);
+  sqlite3_finalize(pInsert);
+  sqlite3_free(zQuery);
+  sqlite3_free(zInsert);
+}
+
+
+/*
+** Try to transfer all rows of the schema that match zWhere.  For
+** each row, invoke xForEach() on the object defined by that row.
+** If an error is encountered while moving forward through the
+** sqlite_master table, try again moving backwards.
+*/
+static void tryToCloneSchema(
+  struct callback_data *p,
+  sqlite3 *newDb,
+  const char *zWhere,
+  void (*xForEach)(struct callback_data*,sqlite3*,const char*)
+){
+  sqlite3_stmt *pQuery = 0;
+  char *zQuery = 0;
+  int rc;
+  const unsigned char *zName;
+  const unsigned char *zSql;
+  char *zErrMsg = 0;
+
+  zQuery = sqlite3_mprintf("SELECT name, sql FROM sqlite_master"
+                           " WHERE %s", zWhere);
+  rc = sqlite3_prepare_v2(p->db, zQuery, -1, &pQuery, 0);
+  if( rc ){
+    fprintf(stderr, "Error: (%d) %s on [%s]\n",
+                    sqlite3_extended_errcode(p->db), sqlite3_errmsg(p->db),
+                    zQuery);
+    goto end_schema_xfer;
+  }
+  while( (rc = sqlite3_step(pQuery))==SQLITE_ROW ){
+    zName = sqlite3_column_text(pQuery, 0);
+    zSql = sqlite3_column_text(pQuery, 1);
+    printf("%s... ", zName); fflush(stdout);
+    sqlite3_exec(newDb, (const char*)zSql, 0, 0, &zErrMsg);
+    if( zErrMsg ){
+      fprintf(stderr, "Error: %s\nSQL: [%s]\n", zErrMsg, zSql);
+      sqlite3_free(zErrMsg);
+      zErrMsg = 0;
+    }
+    if( xForEach ){
+      xForEach(p, newDb, (const char*)zName);
+    }
+    printf("done\n");
+  }
+  if( rc!=SQLITE_DONE ){
+    sqlite3_finalize(pQuery);
+    sqlite3_free(zQuery);
+    zQuery = sqlite3_mprintf("SELECT name, sql FROM sqlite_master"
+                             " WHERE %s ORDER BY rowid DESC", zWhere);
+    rc = sqlite3_prepare_v2(p->db, zQuery, -1, &pQuery, 0);
+    if( rc ){
+      fprintf(stderr, "Error: (%d) %s on [%s]\n",
+                      sqlite3_extended_errcode(p->db), sqlite3_errmsg(p->db),
+                      zQuery);
+      goto end_schema_xfer;
+    }
+    while( (rc = sqlite3_step(pQuery))==SQLITE_ROW ){
+      zName = sqlite3_column_text(pQuery, 0);
+      zSql = sqlite3_column_text(pQuery, 1);
+      printf("%s... ", zName); fflush(stdout);
+      sqlite3_exec(newDb, (const char*)zSql, 0, 0, &zErrMsg);
+      if( zErrMsg ){
+        fprintf(stderr, "Error: %s\nSQL: [%s]\n", zErrMsg, zSql);
+        sqlite3_free(zErrMsg);
+        zErrMsg = 0;
+      }
+      if( xForEach ){
+        xForEach(p, newDb, (const char*)zName);
+      }
+      printf("done\n");
+    }
+  }
+end_schema_xfer:
+  sqlite3_finalize(pQuery);
+  sqlite3_free(zQuery);
+}
+
+/*
+** Open a new database file named "zNewDb".  Try to recover as much information
+** as possible out of the main database (which might be corrupt) and write it
+** into zNewDb.
+*/
+static void tryToClone(struct callback_data *p, const char *zNewDb){
+  int rc;
+  sqlite3 *newDb = 0;
+  if( access(zNewDb,0)==0 ){
+    fprintf(stderr, "File \"%s\" already exists.\n", zNewDb);
+    return;
+  }
+  rc = sqlite3_open(zNewDb, &newDb);
+  if( rc ){
+    fprintf(stderr, "Cannot create output database: %s\n",
+            sqlite3_errmsg(newDb));
+  }else{
+    sqlite3_exec(newDb, "BEGIN EXCLUSIVE;", 0, 0, 0);
+    tryToCloneSchema(p, newDb, "type='table'", tryToCloneData);
+    tryToCloneSchema(p, newDb, "type!='table'", 0);
+    sqlite3_exec(newDb, "COMMIT;", 0, 0, 0);
+  }
+  sqlite3_close(newDb);
+}
+
 /*
 ** If an input line begins with "." then invoke this routine to
 ** process that line.
@@ -2003,6 +2217,10 @@ static int do_meta_command(char *zLine, struct callback_data *p){
    test_breakpoint();
  }else

+  if( c=='c' && strncmp(azArg[0], "clone", n)==0 && nArg>1 && nArg<3 ){
+    tryToClone(p, azArg[1]);
+  }else
+
  if( c=='d' && n>1 && strncmp(azArg[0], "databases", n)==0 && nArg==1 ){
    struct callback_data data;
    char *zErrMsg = 0;
@@ -1982,6 +1982,7 @@ typedef u64 Bitmask;
 ** A bit in a Bitmask
 */
 #define MASKBIT(n)   (((Bitmask)1)<<(n))
+#define MASKBIT32(n) (((unsigned int)1)<<(n))

 /*
 ** The following structure describes the FROM clause of a SELECT statement.
@@ -2160,7 +2161,7 @@ struct Select {
 #define SF_HasTypeInfo     0x0020  /* FROM subqueries have Table metadata */
 #define SF_UseSorter       0x0040  /* Sort using a sorter */
 #define SF_Values          0x0080  /* Synthesized from VALUES clause */
-#define SF_Materialize     0x0100  /* Force materialization of views */
+#define SF_Materialize     0x0100  /* NOT USED */
 #define SF_NestedFrom      0x0200  /* Part of a parenthesized FROM clause */
 #define SF_MaybeConvert    0x0400  /* Need convertCompoundSelectToSubquery() */
 #define SF_Recursive       0x0800  /* The recursive part of a recursive CTE */
@@ -2357,22 +2358,23 @@ struct Parse {
  int nSet;            /* Number of sets used so far */
  int nOnce;           /* Number of OP_Once instructions so far */
  int nOpAlloc;        /* Number of slots allocated for Vdbe.aOp[] */
-  int nLabel;          /* Number of labels used */
-  int *aLabel;         /* Space to hold the labels */
  int iFixedOp;        /* Never back out opcodes iFixedOp-1 or earlier */
  int ckBase;          /* Base register of data during check constraints */
  int iPartIdxTab;     /* Table corresponding to a partial index */
  int iCacheLevel;     /* ColCache valid when aColCache[].iLevel<=iCacheLevel */
  int iCacheCnt;       /* Counter used to generate aColCache[].lru values */
+  int nLabel;          /* Number of labels used */
+  int *aLabel;         /* Space to hold the labels */
  struct yColCache {
    int iTable;           /* Table cursor number */
-    int iColumn;          /* Table column number */
+    i16 iColumn;          /* Table column number */
    u8 tempReg;           /* iReg is a temp register that needs to be freed */
    int iLevel;           /* Nesting level */
    int iReg;             /* Reg with value of this column. 0 means none. */
    int lru;              /* Least recently used entry has the smallest value */
  } aColCache[SQLITE_N_COLCACHE];  /* One for each column cache entry */
  ExprList *pConstExpr;/* Constant expressions */
+  Token constraintName;/* Name of the constraint currently being parsed */
  yDbMask writeMask;   /* Start a write transaction on these databases */
  yDbMask cookieMask;  /* Bitmask of schema verified databases */
  int cookieGoto;      /* Address of OP_Goto to cookie verifier subroutine */
@@ -2380,7 +2382,6 @@ struct Parse {
  int regRowid;        /* Register holding rowid of CREATE TABLE entry */
  int regRoot;         /* Register holding root page number for new objects */
  int nMaxArg;         /* Max args passed to user function by sub-program */
-  Token constraintName;/* Name of the constraint currently being parsed */
 #ifndef SQLITE_OMIT_SHARED_CACHE
  int nTableLock;        /* Number of locks in aTableLock */
  TableLock *aTableLock; /* Required table locks for shared-cache mode */
@@ -2399,12 +2400,17 @@ struct Parse {
  u8 eOrconf;          /* Default ON CONFLICT policy for trigger steps */
  u8 disableTriggers;  /* True to disable triggers */

-  /* Above is constant between recursions.  Below is reset before and after
-  ** each recursion */
+  /************************************************************************
+  ** Above is constant between recursions.  Below is reset before and after
+  ** each recursion.  The boundary between these two regions is determined
+  ** using offsetof(Parse,nVar) so the nVar field must be the first field
+  ** in the recursive region.
+  ************************************************************************/

  int nVar;                 /* Number of '?' variables seen in the SQL so far */
  int nzVar;                /* Number of available slots in azVar[] */
  u8 iPkSortOrder;          /* ASC or DESC for INTEGER PRIMARY KEY */
+  u8 bFreeWith;             /* True if pWith should be freed with parser */
  u8 explain;               /* True if the EXPLAIN flag is found on the query */
 #ifndef SQLITE_OMIT_VIRTUALTABLE
  u8 declareVtab;           /* True if inside sqlite3_declare_vtab() */
@@ -2431,7 +2437,6 @@ struct Parse {
  Table *pZombieTab;        /* List of Table objects to delete after code gen */
  TriggerPrg *pTriggerPrg;  /* Linked list of coded triggers */
  With *pWith;              /* Current WITH clause, or NULL */
-  u8 bFreeWith;             /* True if pWith should be freed with parser */
 };

 /*
@@ -873,7 +873,7 @@ static int auth_callback(
  const char *zArg3,
  const char *zArg4
 ){
-  char *zCode;
+  const char *zCode;
  Tcl_DString str;
  int rc;
  const char *zReply;
@@ -999,7 +999,7 @@ static int DbTransPostCmd(
  Tcl_Interp *interp,                  /* Tcl interpreter */
  int result                           /* Result of evaluating SCRIPT */
 ){
-  static const char *azEnd[] = {
+  static const char *const azEnd[] = {
    "RELEASE _tcl_transaction",        /* rc==TCL_ERROR, nTransaction!=0 */
    "COMMIT",                          /* rc!=TCL_ERROR, nTransaction==0 */
    "ROLLBACK TO _tcl_transaction ; RELEASE _tcl_transaction",
@@ -1937,7 +1937,7 @@ static int DbObjCmd(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
        Tcl_AppendResult(interp, pDb->zCommit, 0);
      }
    }else{
-      char *zCommit;
+      const char *zCommit;
      int len;
      if( pDb->zCommit ){
        Tcl_Free(pDb->zCommit);
@@ -2010,14 +2010,14 @@ static int DbObjCmd(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
    char *zSql;                 /* An SQL statement */
    char *zLine;                /* A single line of input from the file */
    char **azCol;               /* zLine[] broken up into columns */
-    char *zCommit;              /* How to commit changes */
+    const char *zCommit;        /* How to commit changes */
    FILE *in;                   /* The input file */
    int lineno = 0;             /* Line number of input file */
    char zLineNum[80];          /* Line number print buffer */
    Tcl_Obj *pResult;           /* interp result */

-    char *zSep;
-    char *zNull;
+    const char *zSep;
+    const char *zNull;
    if( objc<5 || objc>7 ){
      Tcl_WrongNumArgs(interp, 2, objv, 
         "CONFLICT-ALGORITHM TABLE FILENAME ?SEPARATOR? ?NULLINDICATOR?");
@@ -2935,7 +2935,7 @@ static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
  if( objc==2 ){
    zArg = Tcl_GetStringFromObj(objv[1], 0);
    if( strcmp(zArg,"-version")==0 ){
-      Tcl_AppendResult(interp,sqlite3_version,0);
+      Tcl_AppendResult(interp,sqlite3_libversion(),0);
      return TCL_OK;
    }
    if( strcmp(zArg,"-has-codec")==0 ){
@@ -3017,7 +3017,7 @@ static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
  zErrMsg = 0;
  p = (SqliteDb*)Tcl_Alloc( sizeof(*p) );
  if( p==0 ){
-    Tcl_SetResult(interp, "malloc failed", TCL_STATIC);
+    Tcl_SetResult(interp, (char *)"malloc failed", TCL_STATIC);
    return TCL_ERROR;
  }
  memset(p, 0, sizeof(*p));
@@ -242,7 +242,28 @@ static int test_io_trace(
  return TCL_OK;
 }

-
+/*
+** Usage:  clang_sanitize_address 
+**
+** Returns true if the program was compiled using clang with the 
+** -fsanitize=address switch on the command line. False otherwise.
+*/
+static int clang_sanitize_address(
+  void *NotUsed,
+  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
+  int argc,              /* Number of arguments */
+  char **argv            /* Text of each argument */
+){
+  int res = 0;
+#if defined(__has_feature)
+# if __has_feature(address_sanitizer)
+  res = 1;
+# endif
+#endif
+  Tcl_SetObjResult(interp, Tcl_NewIntObj(res));
+  return TCL_OK;
+}
+  
 /*
 ** Usage:  sqlite3_exec_printf  DB  FORMAT  STRING
 **
@@ -6323,6 +6344,7 @@ int Sqlitetest1_Init(Tcl_Interp *interp){
     { "sqlite3_busy_timeout",          (Tcl_CmdProc*)test_busy_timeout     },
     { "printf",                        (Tcl_CmdProc*)test_printf           },
     { "sqlite3IoTrace",              (Tcl_CmdProc*)test_io_trace         },
+     { "clang_sanitize_address",        (Tcl_CmdProc*)clang_sanitize_address },
  };
  static struct {
     char *zName;
@@ -892,7 +892,7 @@ static int echoBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
    pIdxInfo->estimatedCost = cost;
  }else if( useIdx ){
    /* Approximation of log2(nRow). */
-    for( ii=0; ii<(sizeof(int)*8); ii++ ){
+    for( ii=0; ii<(sizeof(int)*8)-1; ii++ ){
      if( nRow & (1<<ii) ){
        pIdxInfo->estimatedCost = (double)ii;
      }
@@ -467,9 +467,10 @@ void sqlite3Update(
    );
    for(i=0; i<pTab->nCol; i++){
      if( oldmask==0xffffffff
-       || (i<32 && (oldmask & (1<<i)))
+       || (i<32 && (oldmask & MASKBIT32(i))!=0)
       || (pTab->aCol[i].colFlags & COLFLAG_PRIMKEY)!=0
      ){
+        testcase(  oldmask!=0xffffffff && i==31 );
        sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, i, regOld+i);
      }else{
        sqlite3VdbeAddOp2(v, OP_Null, 0, regOld+i);
@@ -504,7 +505,7 @@ void sqlite3Update(
      j = aXRef[i];
      if( j>=0 ){
        sqlite3ExprCode(pParse, pChanges->a[j].pExpr, regNew+i);
-      }else if( 0==(tmask&TRIGGER_BEFORE) || i>31 || (newmask&(1<<i)) ){
+      }else if( 0==(tmask&TRIGGER_BEFORE) || i>31 || (newmask & MASKBIT32(i)) ){
        /* This branch loads the value of a column that will not be changed 
        ** into a register. This is done if there are no BEFORE triggers, or
        ** if there are one or more BEFORE triggers that use this value via
@@ -1001,7 +1001,8 @@ int sqlite3VarintLen(u64 v){
 ** Read or write a four-byte big-endian integer value.
 */
 u32 sqlite3Get4byte(const u8 *p){
-  return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
+  testcase( p[0]&0x80 );
+  return ((unsigned)p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
 }
 void sqlite3Put4byte(unsigned char *p, u32 v){
  p[0] = (u8)(v>>24);
@@ -9,33 +9,8 @@
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** The code in this file implements execution method of the 
-** Virtual Database Engine (VDBE).  A separate file ("vdbeaux.c")
-** handles housekeeping details such as creating and deleting
-** VDBE instances.  This file is solely interested in executing
-** the VDBE program.
-**
-** In the external interface, an "sqlite3_stmt*" is an opaque pointer
-** to a VDBE.
-**
-** The SQL parser generates a program which is then executed by
-** the VDBE to do the work of the SQL statement.  VDBE programs are 
-** similar in form to assembly language.  The program consists of
-** a linear sequence of operations.  Each operation has an opcode 
-** and 5 operands.  Operands P1, P2, and P3 are integers.  Operand P4 
-** is a null-terminated string.  Operand P5 is an unsigned character.
-** Few opcodes use all 5 operands.
-**
-** Computation results are stored on a set of registers numbered beginning
-** with 1 and going up to Vdbe.nMem.  Each register can store
-** either an integer, a null-terminated string, a floating point
-** number, or the SQL "NULL" value.  An implicit conversion from one
-** type to the other occurs as necessary.
-** 
-** Most of the code in this file is taken up by the sqlite3VdbeExec()
-** function which does the work of interpreting a VDBE program.
-** But other routines are also provided to help in building up
-** a program instruction by instruction.
+** The code in this file implements the function that runs the
+** bytecode of a prepared statement.
 **
 ** Various scripts scan this source file in order to generate HTML
 ** documentation, headers files, or other derived files.  The formatting
@@ -49,7 +24,11 @@
 /*
 ** Invoke this macro on memory cells just prior to changing the
 ** value of the cell.  This macro verifies that shallow copies are
-** not misused.
+** not misused.  A shallow copy of a string or blob just copies a
+** pointer to the string or blob, not the content.  If the original
+** is changed while the copy is still in use, the string or blob might
+** be changed out from under the copy.  This macro verifies that nothing
+** like that every happens.
 */
 #ifdef SQLITE_DEBUG
 # define memAboutToChange(P,M) sqlite3VdbeMemAboutToChange(P,M)
@@ -108,7 +87,7 @@ static void updateMaxBlobsize(Mem *p){
 #endif

 /*
-** The next global variable is incremented each type the OP_Found opcode
+** The next global variable is incremented each time the OP_Found opcode
 ** is executed. This is used to test whether or not the foreign key
 ** operation implemented using OP_FkIsZero is working. This variable
 ** has no function other than to help verify the correct operation of the
@@ -152,7 +131,7 @@ int sqlite3_found_count = 0;
       && sqlite3VdbeMemMakeWriteable(P) ){ goto no_mem;}

 /* Return true if the cursor was opened using the OP_OpenSorter opcode. */
-# define isSorter(x) ((x)->pSorter!=0)
+#define isSorter(x) ((x)->pSorter!=0)

 /*
 ** Argument pMem points at a register that will be passed to a
@@ -414,7 +393,7 @@ void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf){
 ** Print the value of a register for tracing purposes:
 */
 static void memTracePrint(Mem *p){
-  if( p->flags & MEM_Invalid ){
+  if( p->flags & MEM_Undefined ){
    printf(" undefined");
  }else if( p->flags & MEM_Null ){
    printf(" NULL");
@@ -458,20 +437,6 @@ static void registerTrace(int iReg, Mem *p){

 #endif

-/*
-** The CHECK_FOR_INTERRUPT macro defined here looks to see if the
-** sqlite3_interrupt() routine has been called.  If it has been, then
-** processing of the VDBE program is interrupted.
-**
-** This macro added to every instruction that does a jump in order to
-** implement a loop.  This test used to be on every single instruction,
-** but that meant we more testing than we needed.  By only testing the
-** flag on jump instructions, we get a (small) speed improvement.
-*/
-#define CHECK_FOR_INTERRUPT \
-   if( db->u1.isInterrupted ) goto abort_due_to_interrupt;
-
-
 #ifndef NDEBUG
 /*
 ** This function is only called from within an assert() expression. It
@@ -494,35 +459,8 @@ static int checkSavepointCount(sqlite3 *db){


 /*
-** Execute as much of a VDBE program as we can then return.
-**
-** sqlite3VdbeMakeReady() must be called before this routine in order to
-** close the program with a final OP_Halt and to set up the callbacks
-** and the error message pointer.
-**
-** Whenever a row or result data is available, this routine will either
-** invoke the result callback (if there is one) or return with
-** SQLITE_ROW.
-**
-** If an attempt is made to open a locked database, then this routine
-** will either invoke the busy callback (if there is one) or it will
-** return SQLITE_BUSY.
-**
-** If an error occurs, an error message is written to memory obtained
-** from sqlite3_malloc() and p->zErrMsg is made to point to that memory.
-** The error code is stored in p->rc and this routine returns SQLITE_ERROR.
-**
-** If the callback ever returns non-zero, then the program exits
-** immediately.  There will be no error message but the p->rc field is
-** set to SQLITE_ABORT and this routine will return SQLITE_ERROR.
-**
-** A memory allocation error causes p->rc to be set to SQLITE_NOMEM and this
-** routine to return SQLITE_ERROR.
-**
-** Other fatal errors return SQLITE_ERROR.
-**
-** After this routine has finished, sqlite3VdbeFinalize() should be
-** used to clean up the mess that was left behind.
+** Execute as much of a VDBE program as we can.
+** This is the core of sqlite3_step().  
 */
 int sqlite3VdbeExec(
  Vdbe *p                    /* The VDBE */
@@ -566,7 +504,7 @@ int sqlite3VdbeExec(
  assert( p->explain==0 );
  p->pResultSet = 0;
  db->busyHandler.nBusy = 0;
-  CHECK_FOR_INTERRUPT;
+  if( db->u1.isInterrupted ) goto abort_due_to_interrupt;
  sqlite3VdbeIOTraceSql(p);
 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  if( db->xProgress ){
@@ -742,7 +680,7 @@ case OP_Goto: {             /* jump */
  ** checks on every opcode.  This helps sqlite3_step() to run about 1.5%
  ** faster according to "valgrind --tool=cachegrind" */
 check_for_interrupt:
-  CHECK_FOR_INTERRUPT;
+  if( db->u1.isInterrupted ) goto abort_due_to_interrupt;
 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  /* Call the progress callback if it is configured and the required number
  ** of VDBE ops have been executed (either since this invocation of
@@ -782,20 +720,66 @@ case OP_Gosub: {            /* jump */

 /* Opcode:  Return P1 * * * *
 **
-** Jump to the next instruction after the address in register P1.
+** Jump to the next instruction after the address in register P1.  After
+** the jump, register P1 becomes undefined.
 */
 case OP_Return: {           /* in1 */
  pIn1 = &aMem[pOp->p1];
-  assert( pIn1->flags & MEM_Int );
+  assert( pIn1->flags==MEM_Int );
  pc = (int)pIn1->u.i;
+  pIn1->flags = MEM_Undefined;
  break;
 }

-/* Opcode:  Yield P1 * * * *
+/* Opcode: InitCoroutine P1 P2 P3 * *
+**
+** Set up register P1 so that it will OP_Yield to the co-routine
+** located at address P3.
+**
+** If P2!=0 then the co-routine implementation immediately follows
+** this opcode.  So jump over the co-routine implementation to
+** address P2.
+*/
+case OP_InitCoroutine: {     /* jump */
+  assert( pOp->p1>0 &&  pOp->p1<=(p->nMem-p->nCursor) );
+  assert( pOp->p2>=0 && pOp->p2<p->nOp );
+  assert( pOp->p3>=0 && pOp->p3<p->nOp );
+  pOut = &aMem[pOp->p1];
+  assert( !VdbeMemDynamic(pOut) );
+  pOut->u.i = pOp->p3 - 1;
+  pOut->flags = MEM_Int;
+  if( pOp->p2 ) pc = pOp->p2 - 1;
+  break;
+}
+
+/* Opcode:  EndCoroutine P1 * * * *
+**
+** The instruction at the address in register P1 is an OP_Yield.
+** Jump to the P2 parameter of that OP_Yield.
+** After the jump, register P1 becomes undefined.
+*/
+case OP_EndCoroutine: {           /* in1 */
+  VdbeOp *pCaller;
+  pIn1 = &aMem[pOp->p1];
+  assert( pIn1->flags==MEM_Int );
+  assert( pIn1->u.i>=0 && pIn1->u.i<p->nOp );
+  pCaller = &aOp[pIn1->u.i];
+  assert( pCaller->opcode==OP_Yield );
+  assert( pCaller->p2>=0 && pCaller->p2<p->nOp );
+  pc = pCaller->p2 - 1;
+  pIn1->flags = MEM_Undefined;
+  break;
+}
+
+/* Opcode:  Yield P1 P2 * * *
 **
 ** Swap the program counter with the value in register P1.
+**
+** If the co-routine ends with OP_Yield or OP_Return then continue
+** to the next instruction.  But if the co-routine ends with
+** OP_EndCoroutine, jump immediately to P2.
 */
-case OP_Yield: {            /* in1 */
+case OP_Yield: {            /* in1, jump */
  int pcDest;
  pIn1 = &aMem[pOp->p1];
  assert( (pIn1->flags & MEM_Dyn)==0 );
@@ -808,7 +792,7 @@ case OP_Yield: {            /* in1 */
 }

 /* Opcode:  HaltIfNull  P1 P2 P3 P4 P5
-** Synopsis:  if r[P3] null then halt
+** Synopsis:  if r[P3]=null halt
 **
 ** Check the value in register P3.  If it is NULL then Halt using
 ** parameter P1, P2, and P4 as if this were a Halt instruction.  If the
@@ -956,7 +940,9 @@ case OP_Real: {            /* same as TK_FLOAT, out2-prerelease */
 ** Synopsis: r[P2]='P4'
 **
 ** P4 points to a nul terminated UTF-8 string. This opcode is transformed 
-** into an OP_String before it is executed for the first time.
+** into an OP_String before it is executed for the first time.  During
+** this transformation, the length of string P4 is computed and stored
+** as the P1 parameter.
 */
 case OP_String8: {         /* same as TK_STRING, out2-prerelease */
  assert( pOp->p4.z!=0 );
@@ -1031,7 +1017,7 @@ case OP_Null: {           /* out2-prerelease */
 }


-/* Opcode: Blob P1 P2 * P4
+/* Opcode: Blob P1 P2 * P4 *
 ** Synopsis: r[P2]=P4 (len=P1)
 **
 ** P4 points to a blob of data P1 bytes long.  Store this
@@ -1050,7 +1036,7 @@ case OP_Blob: {                /* out2-prerelease */
 **
 ** Transfer the values of bound parameter P1 into register P2
 **
-** If the parameter is named, then its name appears in P4 and P3==1.
+** If the parameter is named, then its name appears in P4.
 ** The P4 value is used by sqlite3_bind_parameter_name().
 */
 case OP_Variable: {            /* out2-prerelease */
@@ -1169,8 +1155,8 @@ case OP_SCopy: {            /* out2 */
 ** The registers P1 through P1+P2-1 contain a single row of
 ** results. This opcode causes the sqlite3_step() call to terminate
 ** with an SQLITE_ROW return code and it sets up the sqlite3_stmt
-** structure to provide access to the top P1 values as the result
-** row.
+** structure to provide access to the r[P1]..r[P1+P2-1] values as
+** the result row.
 */
 case OP_ResultRow: {
  Mem *pMem;
@@ -1698,7 +1684,7 @@ case OP_RealAffinity: {                  /* in1 */
 **
 ** Force the value in register P1 to be text.
 ** If the value is numeric, convert it to a string using the
-** equivalent of printf().  Blob values are unchanged and
+** equivalent of sprintf().  Blob values are unchanged and
 ** are afterwards simply interpreted as text.
 **
 ** A NULL value is not changed by this routine.  It remains NULL.
@@ -2153,7 +2139,9 @@ case OP_BitNot: {             /* same as TK_BITNOT, in1, out2 */
 /* Opcode: Once P1 P2 * * *
 **
 ** Check if OP_Once flag P1 is set. If so, jump to instruction P2. Otherwise,
-** set the flag and fall through to the next instruction.
+** set the flag and fall through to the next instruction.  In other words,
+** this opcode causes all following up codes up through P2 (but not including
+** P2) to run just once and skipped on subsequent times through the loop.
 */
 case OP_Once: {             /* jump */
  assert( pOp->p1<p->nOnceFlag );
@@ -2946,7 +2934,7 @@ case OP_AutoCommit: {
  break;
 }

-/* Opcode: Transaction P1 P2 * * *
+/* Opcode: Transaction P1 P2 P3 P4 P5
 **
 ** Begin a transaction.  The transaction ends when a Commit or Rollback
 ** opcode is encountered.  Depending on the ON CONFLICT setting, the
@@ -2976,9 +2964,17 @@ case OP_AutoCommit: {
 ** will automatically commit when the VDBE halts.
 **
 ** If P2 is zero, then a read-lock is obtained on the database file.
+**
+** If P5!=0 then this opcode also checks the schema cookie against P3
+** and the schema generation counter against P4.
+** The cookie changes its value whenever the database schema changes.
+** This operation is used to detect when that the cookie has changed
+** and that the current process needs to reread the schema.
 */
 case OP_Transaction: {
  Btree *pBt;
+  int iMeta;
+  int iGen;

  assert( p->bIsReader );
  assert( p->readOnly==0 || pOp->p2==0 );
@@ -3022,6 +3018,35 @@ case OP_Transaction: {
      p->nStmtDefCons = db->nDeferredCons;
      p->nStmtDefImmCons = db->nDeferredImmCons;
    }
+
+    /* Gather the schema version number for checking */
+    sqlite3BtreeGetMeta(pBt, BTREE_SCHEMA_VERSION, (u32 *)&iMeta);
+    iGen = db->aDb[pOp->p1].pSchema->iGeneration;
+  }else{
+    iGen = iMeta = 0;
+  }
+  assert( pOp->p5==0 || pOp->p4type==P4_INT32 );
+  if( pOp->p5 && (iMeta!=pOp->p3 || iGen!=pOp->p4.i) ){
+    sqlite3DbFree(db, p->zErrMsg);
+    p->zErrMsg = sqlite3DbStrDup(db, "database schema has changed");
+    /* If the schema-cookie from the database file matches the cookie 
+    ** stored with the in-memory representation of the schema, do
+    ** not reload the schema from the database file.
+    **
+    ** If virtual-tables are in use, this is not just an optimization.
+    ** Often, v-tables store their data in other SQLite tables, which
+    ** are queried from within xNext() and other v-table methods using
+    ** prepared queries. If such a query is out-of-date, we do not want to
+    ** discard the database schema, as the user code implementing the
+    ** v-table would have to be ready for the sqlite3_vtab structure itself
+    ** to be invalidated whenever sqlite3_step() is called from within 
+    ** a v-table method.
+    */
+    if( db->aDb[pOp->p1].pSchema->schema_cookie!=iMeta ){
+      sqlite3ResetOneSchema(db, pOp->p1);
+    }
+    p->expired = 1;
+    rc = SQLITE_SCHEMA;
  }
  break;
 }
@@ -3096,66 +3121,6 @@ case OP_SetCookie: {       /* in3 */
  break;
 }

-/* Opcode: VerifyCookie P1 P2 P3 * *
-**
-** Check the value of global database parameter number 0 (the
-** schema version) and make sure it is equal to P2 and that the
-** generation counter on the local schema parse equals P3.
-**
-** P1 is the database number which is 0 for the main database file
-** and 1 for the file holding temporary tables and some higher number
-** for auxiliary databases.
-**
-** The cookie changes its value whenever the database schema changes.
-** This operation is used to detect when that the cookie has changed
-** and that the current process needs to reread the schema.
-**
-** Either a transaction needs to have been started or an OP_Open needs
-** to be executed (to establish a read lock) before this opcode is
-** invoked.
-*/
-case OP_VerifyCookie: {
-  int iMeta;
-  int iGen;
-  Btree *pBt;
-
-  assert( pOp->p1>=0 && pOp->p1<db->nDb );
-  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );
-  assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );
-  assert( p->bIsReader );
-  pBt = db->aDb[pOp->p1].pBt;
-  if( pBt ){
-    sqlite3BtreeGetMeta(pBt, BTREE_SCHEMA_VERSION, (u32 *)&iMeta);
-    iGen = db->aDb[pOp->p1].pSchema->iGeneration;
-  }else{
-    iGen = iMeta = 0;
-  }
-  if( iMeta!=pOp->p2 || iGen!=pOp->p3 ){
-    sqlite3DbFree(db, p->zErrMsg);
-    p->zErrMsg = sqlite3DbStrDup(db, "database schema has changed");
-    /* If the schema-cookie from the database file matches the cookie 
-    ** stored with the in-memory representation of the schema, do
-    ** not reload the schema from the database file.
-    **
-    ** If virtual-tables are in use, this is not just an optimization.
-    ** Often, v-tables store their data in other SQLite tables, which
-    ** are queried from within xNext() and other v-table methods using
-    ** prepared queries. If such a query is out-of-date, we do not want to
-    ** discard the database schema, as the user code implementing the
-    ** v-table would have to be ready for the sqlite3_vtab structure itself
-    ** to be invalidated whenever sqlite3_step() is called from within 
-    ** a v-table method.
-    */
-    if( db->aDb[pOp->p1].pSchema->schema_cookie!=iMeta ){
-      sqlite3ResetOneSchema(db, pOp->p1);
-    }
-
-    p->expired = 1;
-    rc = SQLITE_SCHEMA;
-  }
-  break;
-}
-
 /* Opcode: OpenRead P1 P2 P3 P4 P5
 ** Synopsis: root=P2 iDb=P3
 **
@@ -3369,7 +3334,7 @@ case OP_OpenEphemeral: {
  break;
 }

-/* Opcode: SorterOpen P1 * * P4 *
+/* Opcode: SorterOpen P1 P2 * P4 *
 **
 ** This opcode works like OP_OpenEphemeral except that it opens
 ** a transient index that is specifically designed to sort large
@@ -3599,6 +3564,7 @@ case OP_SeekGt: {       /* jump, in3 */
 #endif
  if( oc>=OP_SeekGe ){  assert( oc==OP_SeekGe || oc==OP_SeekGt );
    if( res<0 || (res==0 && oc==OP_SeekGt) ){
+      res = 0;
      rc = sqlite3BtreeNext(pC->pCursor, &res);
      if( rc!=SQLITE_OK ) goto abort_due_to_error;
      pC->rowidIsValid = 0;
@@ -3608,6 +3574,7 @@ case OP_SeekGt: {       /* jump, in3 */
  }else{
    assert( oc==OP_SeekLt || oc==OP_SeekLe );
    if( res>0 || (res==0 && oc==OP_SeekLt) ){
+      res = 0;
      rc = sqlite3BtreePrevious(pC->pCursor, &res);
      if( rc!=SQLITE_OK ) goto abort_due_to_error;
      pC->rowidIsValid = 0;
@@ -4234,7 +4201,7 @@ case OP_SorterData: {
 **
 ** Write into register P2 the complete row key for cursor P1.
 ** There is no interpretation of the data.  
-** The key is copied onto the P3 register exactly as 
+** The key is copied onto the P2 register exactly as 
 ** it is found in the database file.
 **
 ** If the P1 cursor must be pointing to a valid row (not a NULL row)
@@ -4460,7 +4427,7 @@ case OP_Rewind: {        /* jump */
  break;
 }

-/* Opcode: Next P1 P2 * * P5
+/* Opcode: Next P1 P2 P3 P4 P5
 **
 ** Advance cursor P1 so that it points to the next key/data pair in its
 ** table or index.  If there are no more key/value pairs then fall through
@@ -4470,6 +4437,11 @@ case OP_Rewind: {        /* jump */
 ** The P1 cursor must be for a real table, not a pseudo-table.  P1 must have
 ** been opened prior to this opcode or the program will segfault.
 **
+** The P3 value is a hint to the btree implementation. If P3==1, that
+** means P1 is an SQL index and that this instruction could have been
+** omitted if that index had been unique.  P3 is usually 0.  P3 is
+** always either 0 or 1.
+**
 ** P4 is always of type P4_ADVANCE. The function pointer points to
 ** sqlite3BtreeNext().
 **
@@ -4478,12 +4450,12 @@ case OP_Rewind: {        /* jump */
 **
 ** See also: Prev, NextIfOpen
 */
-/* Opcode: NextIfOpen P1 P2 * * P5
+/* Opcode: NextIfOpen P1 P2 P3 P4 P5
 **
 ** This opcode works just like OP_Next except that if cursor P1 is not
 ** open it behaves a no-op.
 */
-/* Opcode: Prev P1 P2 * * P5
+/* Opcode: Prev P1 P2 P3 P4 P5
 **
 ** Back up cursor P1 so that it points to the previous key/data pair in its
 ** table or index.  If there is no previous key/value pairs then fall through
@@ -4493,13 +4465,18 @@ case OP_Rewind: {        /* jump */
 ** The P1 cursor must be for a real table, not a pseudo-table.  If P1 is
 ** not open then the behavior is undefined.
 **
+** The P3 value is a hint to the btree implementation. If P3==1, that
+** means P1 is an SQL index and that this instruction could have been
+** omitted if that index had been unique.  P3 is usually 0.  P3 is
+** always either 0 or 1.
+**
 ** P4 is always of type P4_ADVANCE. The function pointer points to
 ** sqlite3BtreePrevious().
 **
 ** If P5 is positive and the jump is taken, then event counter
 ** number P5-1 in the prepared statement is incremented.
 */
-/* Opcode: PrevIfOpen P1 P2 * * P5
+/* Opcode: PrevIfOpen P1 P2 P3 P4 P5
 **
 ** This opcode works just like OP_Prev except that if cursor P1 is not
 ** open it behaves a no-op.
@@ -4521,9 +4498,12 @@ case OP_Next:          /* jump */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p5<ArraySize(p->aCounter) );
  pC = p->apCsr[pOp->p1];
+  res = pOp->p3;
  assert( pC!=0 );
  assert( pC->deferredMoveto==0 );
  assert( pC->pCursor );
+  assert( res==0 || (res==1 && pC->isTable==0) );
+  testcase( res==1 );
  assert( pOp->opcode!=OP_Next || pOp->p4.xAdvance==sqlite3BtreeNext );
  assert( pOp->opcode!=OP_Prev || pOp->p4.xAdvance==sqlite3BtreePrevious );
  assert( pOp->opcode!=OP_NextIfOpen || pOp->p4.xAdvance==sqlite3BtreeNext );
@@ -4555,6 +4535,14 @@ next_tail:
 ** P3 is a flag that provides a hint to the b-tree layer that this
 ** insert is likely to be an append.
 **
+** If P5 has the OPFLAG_NCHANGE bit set, then the change counter is
+** incremented by this instruction.  If the OPFLAG_NCHANGE bit is clear,
+** then the change counter is unchanged.
+**
+** If P5 has the OPFLAG_USESEEKRESULT bit set, then the cursor must have
+** just done a seek to the spot where the new entry is to be inserted.
+** This flag avoids doing an extra seek.
+**
 ** This instruction only works for indices.  The equivalent instruction
 ** for tables is OP_Insert.
 */
@@ -5155,7 +5143,7 @@ case OP_RowSetTest: {                     /* jump, in1, in3 */

 #ifndef SQLITE_OMIT_TRIGGER

-/* Opcode: Program P1 P2 P3 P4 *
+/* Opcode: Program P1 P2 P3 P4 P5
 **
 ** Execute the trigger program passed as P4 (type P4_SUBPROGRAM). 
 **
@@ -5167,6 +5155,8 @@ case OP_RowSetTest: {                     /* jump, in1, in3 */
 ** memory required by the sub-vdbe at runtime.
 **
 ** P4 is a pointer to the VM containing the trigger program.
+**
+** If P5 is non-zero, then recursive program invocation is enabled.
 */
 case OP_Program: {        /* jump */
  int nMem;               /* Number of memory registers for sub-program */
@@ -5244,7 +5234,7 @@ case OP_Program: {        /* jump */

    pEnd = &VdbeFrameMem(pFrame)[pFrame->nChildMem];
    for(pMem=VdbeFrameMem(pFrame); pMem!=pEnd; pMem++){
-      pMem->flags = MEM_Invalid;
+      pMem->flags = MEM_Undefined;
      pMem->db = db;
    }
  }else{
@@ -5554,7 +5544,7 @@ case OP_Checkpoint: {
 #endif

 #ifndef SQLITE_OMIT_PRAGMA
-/* Opcode: JournalMode P1 P2 P3 * P5
+/* Opcode: JournalMode P1 P2 P3 * *
 **
 ** Change the journal mode of database P1 to P3. P3 must be one of the
 ** PAGER_JOURNALMODE_XXX values. If changing between the various rollback
@@ -6040,7 +6030,7 @@ case OP_VRename: {
 #endif

 #ifndef SQLITE_OMIT_VIRTUALTABLE
-/* Opcode: VUpdate P1 P2 P3 P4 *
+/* Opcode: VUpdate P1 P2 P3 P4 P5
 ** Synopsis: data=r[P3@P2]
 **
 ** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
@@ -6063,6 +6053,9 @@ case OP_VRename: {
 ** P1 is a boolean flag. If it is set to true and the xUpdate call
 ** is successful, then the value returned by sqlite3_last_insert_rowid() 
 ** is set to the value of the rowid for the row just inserted.
+**
+** P5 is the error actions (OE_Replace, OE_Fail, OE_Ignore, etc) to
+** apply in the case of a constraint failure on an insert or update.
 */
 case OP_VUpdate: {
  sqlite3_vtab *pVtab;
@@ -6174,7 +6167,7 @@ case OP_Trace: {
  if( zTrace ){
    int i;
    for(i=0; i<db->nDb; i++){
-      if( ((1<<i) & p->btreeMask)==0 ) continue;
+      if( MASKBIT(i) & p->btreeMask)==0 ) continue;
      sqlite3_file_control(db, db->aDb[i].zName, SQLITE_FCNTL_TRACE, zTrace);
    }
  }
@@ -198,7 +198,7 @@ struct Mem {
 #define MEM_Blob      0x0010   /* Value is a BLOB */
 #define MEM_RowSet    0x0020   /* Value is a RowSet object */
 #define MEM_Frame     0x0040   /* Value is a VdbeFrame object */
-#define MEM_Invalid   0x0080   /* Value is undefined */
+#define MEM_Undefined 0x0080   /* Value is undefined */
 #define MEM_Cleared   0x0100   /* NULL set by OP_Null, not from data */
 #define MEM_TypeMask  0x01ff   /* Mask of type bits */

@@ -230,7 +230,7 @@ struct Mem {
 ** is for use inside assert() statements only.
 */
 #ifdef SQLITE_DEBUG
-#define memIsValid(M)  ((M)->flags & MEM_Invalid)==0
+#define memIsValid(M)  ((M)->flags & MEM_Undefined)==0
 #endif

 /*
@@ -425,9 +425,10 @@ int sqlite3VdbeMemNumerify(Mem*);
 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,int,Mem*);
 void sqlite3VdbeMemRelease(Mem *p);
 void sqlite3VdbeMemReleaseExternal(Mem *p);
+#define VdbeMemDynamic(X)  \
+  (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0)
 #define VdbeMemRelease(X)  \
-  if((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame)) \
-    sqlite3VdbeMemReleaseExternal(X);
+  if( VdbeMemDynamic(X) ) sqlite3VdbeMemReleaseExternal(X);
 int sqlite3VdbeMemFinalize(Mem*, FuncDef*);
 const char *sqlite3OpcodeName(int);
 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);
@@ -1234,7 +1234,7 @@ static void releaseMemArray(Mem *p, int N){
        p->zMalloc = 0;
      }

-      p->flags = MEM_Invalid;
+      p->flags = MEM_Undefined;
    }
    db->mallocFailed = malloc_failed;
  }
@@ -1702,7 +1702,7 @@ void sqlite3VdbeMakeReady(
    p->aMem--;                      /* aMem[] goes from 1..nMem */
    p->nMem = nMem;                 /*       not from 0..nMem-1 */
    for(n=1; n<=nMem; n++){
-      p->aMem[n].flags = MEM_Invalid;
+      p->aMem[n].flags = MEM_Undefined;
      p->aMem[n].db = db;
    }
  }
@@ -1814,7 +1814,7 @@ static void Cleanup(Vdbe *p){
  int i;
  if( p->apCsr ) for(i=0; i<p->nCursor; i++) assert( p->apCsr[i]==0 );
  if( p->aMem ){
-    for(i=1; i<=p->nMem; i++) assert( p->aMem[i].flags==MEM_Invalid );
+    for(i=1; i<=p->nMem; i++) assert( p->aMem[i].flags==MEM_Undefined );
  }
 #endif

@@ -2615,8 +2615,9 @@ void sqlite3VdbeDeleteAuxData(Vdbe *pVdbe, int iOp, int mask){
  while( *pp ){
    AuxData *pAux = *pp;
    if( (iOp<0)
-     || (pAux->iOp==iOp && (pAux->iArg>31 || !(mask & ((u32)1<<pAux->iArg))))
+     || (pAux->iOp==iOp && (pAux->iArg>31 || !(mask & MASKBIT32(pAux->iArg))))
    ){
+      testcase( pAux->iArg==31 );
      if( pAux->xDelete ){
        pAux->xDelete(pAux->pAux);
      }
@@ -2931,6 +2932,9 @@ u32 sqlite3VdbeSerialGet(
  u32 serial_type,              /* Serial type to deserialize */
  Mem *pMem                     /* Memory cell to write value into */
 ){
+  u64 x;
+  u32 y;
+  int i;
  switch( serial_type ){
    case 10:   /* Reserved for future use */
    case 11:   /* Reserved for future use */
@@ -2944,23 +2948,26 @@ u32 sqlite3VdbeSerialGet(
      return 1;
    }
    case 2: { /* 2-byte signed integer */
-      pMem->u.i = (((signed char)buf[0])<<8) | buf[1];
+      i = 256*(signed char)buf[0] | buf[1];
+      pMem->u.i = (i64)i;
      pMem->flags = MEM_Int;
      return 2;
    }
    case 3: { /* 3-byte signed integer */
-      pMem->u.i = (((signed char)buf[0])<<16) | (buf[1]<<8) | buf[2];
+      i = 65536*(signed char)buf[0] | (buf[1]<<8) | buf[2];
+      pMem->u.i = (i64)i;
      pMem->flags = MEM_Int;
      return 3;
    }
    case 4: { /* 4-byte signed integer */
-      pMem->u.i = (buf[0]<<24) | (buf[1]<<16) | (buf[2]<<8) | buf[3];
+      y = ((unsigned)buf[0]<<24) | (buf[1]<<16) | (buf[2]<<8) | buf[3];
+      pMem->u.i = (i64)*(int*)&y;
      pMem->flags = MEM_Int;
      return 4;
    }
    case 5: { /* 6-byte signed integer */
-      u64 x = (((signed char)buf[0])<<8) | buf[1];
-      u32 y = (buf[2]<<24) | (buf[3]<<16) | (buf[4]<<8) | buf[5];
+      x = 256*(signed char)buf[0] + buf[1];
+      y = ((unsigned)buf[2]<<24) | (buf[3]<<16) | (buf[4]<<8) | buf[5];
      x = (x<<32) | y;
      pMem->u.i = *(i64*)&x;
      pMem->flags = MEM_Int;
@@ -2968,8 +2975,6 @@ u32 sqlite3VdbeSerialGet(
    }
    case 6:   /* 8-byte signed integer */
    case 7: { /* IEEE floating point */
-      u64 x;
-      u32 y;
 #if !defined(NDEBUG) && !defined(SQLITE_OMIT_FLOATING_POINT)
      /* Verify that integers and floating point values use the same
      ** byte order.  Or, that if SQLITE_MIXED_ENDIAN_64BIT_FLOAT is
@@ -2982,9 +2987,8 @@ u32 sqlite3VdbeSerialGet(
      swapMixedEndianFloat(t2);
      assert( sizeof(r1)==sizeof(t2) && memcmp(&r1, &t2, sizeof(r1))==0 );
 #endif
-
-      x = (buf[0]<<24) | (buf[1]<<16) | (buf[2]<<8) | buf[3];
-      y = (buf[4]<<24) | (buf[5]<<16) | (buf[6]<<8) | buf[7];
+      x = ((unsigned)buf[0]<<24) | (buf[1]<<16) | (buf[2]<<8) | buf[3];
+      y = ((unsigned)buf[4]<<24) | (buf[5]<<16) | (buf[6]<<8) | buf[7];
      x = (x<<32) | y;
      if( serial_type==6 ){
        pMem->u.i = *(i64*)&x;
@@ -134,21 +134,20 @@ int sqlite3_blob_open(
  ** transaction.
  */
  static const VdbeOpList openBlob[] = {
-    {OP_Transaction, 0, 0, 0},     /* 0: Start a transaction */
-    {OP_VerifyCookie, 0, 0, 0},    /* 1: Check the schema cookie */
-    {OP_TableLock, 0, 0, 0},       /* 2: Acquire a read or write lock */
+    /* {OP_Transaction, 0, 0, 0},  // 0: Inserted separately */
+    {OP_TableLock, 0, 0, 0},       /* 1: Acquire a read or write lock */

    /* One of the following two instructions is replaced by an OP_Noop. */
-    {OP_OpenRead, 0, 0, 0},        /* 3: Open cursor 0 for reading */
-    {OP_OpenWrite, 0, 0, 0},       /* 4: Open cursor 0 for read/write */
+    {OP_OpenRead, 0, 0, 0},        /* 2: Open cursor 0 for reading */
+    {OP_OpenWrite, 0, 0, 0},       /* 3: Open cursor 0 for read/write */

-    {OP_Variable, 1, 1, 1},        /* 5: Push the rowid to the stack */
-    {OP_NotExists, 0, 10, 1},      /* 6: Seek the cursor */
-    {OP_Column, 0, 0, 1},          /* 7  */
-    {OP_ResultRow, 1, 0, 0},       /* 8  */
-    {OP_Goto, 0, 5, 0},            /* 9  */
-    {OP_Close, 0, 0, 0},           /* 10 */
-    {OP_Halt, 0, 0, 0},            /* 11 */
+    {OP_Variable, 1, 1, 1},        /* 4: Push the rowid to the stack */
+    {OP_NotExists, 0, 10, 1},      /* 5: Seek the cursor */
+    {OP_Column, 0, 0, 1},          /* 6  */
+    {OP_ResultRow, 1, 0, 0},       /* 7  */
+    {OP_Goto, 0, 4, 0},            /* 8  */
+    {OP_Close, 0, 0, 0},           /* 9  */
+    {OP_Halt, 0, 0, 0},            /* 10 */
  };

  int rc = SQLITE_OK;
@@ -261,36 +260,31 @@ int sqlite3_blob_open(
      Vdbe *v = (Vdbe *)pBlob->pStmt;
      int iDb = sqlite3SchemaToIndex(db, pTab->pSchema);

+
+      sqlite3VdbeAddOp4Int(v, OP_Transaction, iDb, flags, 
+                           pTab->pSchema->schema_cookie,
+                           pTab->pSchema->iGeneration);
+      sqlite3VdbeChangeP5(v, 1);     
      sqlite3VdbeAddOpList(v, sizeof(openBlob)/sizeof(VdbeOpList), openBlob);

-
-      /* Configure the OP_Transaction */
-      sqlite3VdbeChangeP1(v, 0, iDb);
-      sqlite3VdbeChangeP2(v, 0, flags);
-
-      /* Configure the OP_VerifyCookie */
-      sqlite3VdbeChangeP1(v, 1, iDb);
-      sqlite3VdbeChangeP2(v, 1, pTab->pSchema->schema_cookie);
-      sqlite3VdbeChangeP3(v, 1, pTab->pSchema->iGeneration);
-
      /* Make sure a mutex is held on the table to be accessed */
      sqlite3VdbeUsesBtree(v, iDb); 

      /* Configure the OP_TableLock instruction */
 #ifdef SQLITE_OMIT_SHARED_CACHE
-      sqlite3VdbeChangeToNoop(v, 2);
+      sqlite3VdbeChangeToNoop(v, 1);
 #else
-      sqlite3VdbeChangeP1(v, 2, iDb);
-      sqlite3VdbeChangeP2(v, 2, pTab->tnum);
-      sqlite3VdbeChangeP3(v, 2, flags);
-      sqlite3VdbeChangeP4(v, 2, pTab->zName, P4_TRANSIENT);
+      sqlite3VdbeChangeP1(v, 1, iDb);
+      sqlite3VdbeChangeP2(v, 1, pTab->tnum);
+      sqlite3VdbeChangeP3(v, 1, flags);
+      sqlite3VdbeChangeP4(v, 1, pTab->zName, P4_TRANSIENT);
 #endif

      /* Remove either the OP_OpenWrite or OpenRead. Set the P2 
      ** parameter of the other to pTab->tnum.  */
-      sqlite3VdbeChangeToNoop(v, 4 - flags);
-      sqlite3VdbeChangeP2(v, 3 + flags, pTab->tnum);
-      sqlite3VdbeChangeP3(v, 3 + flags, iDb);
+      sqlite3VdbeChangeToNoop(v, 3 - flags);
+      sqlite3VdbeChangeP2(v, 2 + flags, pTab->tnum);
+      sqlite3VdbeChangeP3(v, 2 + flags, iDb);

      /* Configure the number of columns. Configure the cursor to
      ** think that the table has one more column than it really
@@ -299,8 +293,8 @@ int sqlite3_blob_open(
      ** we can invoke OP_Column to fill in the vdbe cursors type 
      ** and offset cache without causing any IO.
      */
-      sqlite3VdbeChangeP4(v, 3+flags, SQLITE_INT_TO_PTR(pTab->nCol+1),P4_INT32);
-      sqlite3VdbeChangeP2(v, 7, pTab->nCol);
+      sqlite3VdbeChangeP4(v, 2+flags, SQLITE_INT_TO_PTR(pTab->nCol+1),P4_INT32);
+      sqlite3VdbeChangeP2(v, 6, pTab->nCol);
      if( !db->mallocFailed ){
        pParse->nVar = 1;
        pParse->nMem = 1;
@@ -587,7 +587,7 @@ void sqlite3VdbeMemAboutToChange(Vdbe *pVdbe, Mem *pMem){
  Mem *pX;
  for(i=1, pX=&pVdbe->aMem[1]; i<=pVdbe->nMem; i++, pX++){
    if( pX->pScopyFrom==pMem ){
-      pX->flags |= MEM_Invalid;
+      pX->flags |= MEM_Undefined;
      pX->pScopyFrom = 0;
    }
  }
@@ -598,7 +598,7 @@ void sqlite3VdbeMemAboutToChange(Vdbe *pVdbe, Mem *pMem){
 /*
 ** Size of struct Mem not including the Mem.zMalloc member.
 */
-#define MEMCELLSIZE (size_t)(&(((Mem *)0)->zMalloc))
+#define MEMCELLSIZE offsetof(Mem,zMalloc)

 /*
 ** Make an shallow copy of pFrom into pTo.  Prior contents of
@@ -2785,10 +2785,9 @@ static Bitmask codeOneLoopStart(
  /* Special case of a FROM clause subquery implemented as a co-routine */
  if( pTabItem->viaCoroutine ){
    int regYield = pTabItem->regReturn;
-    sqlite3VdbeAddOp2(v, OP_Integer, pTabItem->addrFillSub-1, regYield);
-    pLevel->p2 =  sqlite3VdbeAddOp1(v, OP_Yield, regYield);
+    sqlite3VdbeAddOp3(v, OP_InitCoroutine, regYield, 0, pTabItem->addrFillSub);
+    pLevel->p2 =  sqlite3VdbeAddOp2(v, OP_Yield, regYield, addrBrk);
    VdbeComment((v, "next row of co-routine %s", pTabItem->pTab->zName));
-    sqlite3VdbeAddOp2(v, OP_If, regYield+1, addrBrk);
    pLevel->op = OP_Goto;
  }else

@@ -3184,6 +3183,8 @@ static Bitmask codeOneLoopStart(
      pLevel->op = OP_Next;
    }
    pLevel->p1 = iIdxCur;
+    assert( (WHERE_UNQ_WANTED>>16)==1 );
+    pLevel->p3 = (pLoop->wsFlags>>16)&1;
    if( (pLoop->wsFlags & WHERE_CONSTRAINT)==0 ){
      pLevel->p5 = SQLITE_STMTSTATUS_FULLSCAN_STEP;
    }else{
@@ -3986,12 +3987,13 @@ static int whereLoopAddBtreeIndex(
        || nInMul==0
      );
      pNew->wsFlags |= WHERE_COLUMN_EQ;
-      if( iCol<0  
-       || (pProbe->onError!=OE_None && nInMul==0
-           && pNew->u.btree.nEq==pProbe->nKeyCol-1)
-      ){
+      if( iCol<0 || (nInMul==0 && pNew->u.btree.nEq==pProbe->nKeyCol-1)){
        assert( (pNew->wsFlags & WHERE_COLUMN_IN)==0 || iCol<0 );
-        pNew->wsFlags |= WHERE_ONEROW;
+        if( iCol>=0 && pProbe->onError==OE_None ){
+          pNew->wsFlags |= WHERE_UNQ_WANTED;
+        }else{
+          pNew->wsFlags |= WHERE_ONEROW;
+        }
      }
      pNew->u.btree.nEq++;
      pNew->nOut = nRowEst + nInMul;
@@ -5785,7 +5787,7 @@ void sqlite3WhereEnd(WhereInfo *pWInfo){
    pLoop = pLevel->pWLoop;
    sqlite3VdbeResolveLabel(v, pLevel->addrCont);
    if( pLevel->op!=OP_Noop ){
-      sqlite3VdbeAddOp2(v, pLevel->op, pLevel->p1, pLevel->p2);
+      sqlite3VdbeAddOp3(v, pLevel->op, pLevel->p1, pLevel->p2, pLevel->p3);
      sqlite3VdbeChangeP5(v, pLevel->p5);
    }
    if( pLoop->wsFlags & WHERE_IN_ABLE && pLevel->u.in.nIn>0 ){
@@ -70,7 +70,7 @@ struct WhereLevel {
  int addrFirst;        /* First instruction of interior of the loop */
  int addrBody;         /* Beginning of the body of this loop */
  u8 iFrom;             /* Which entry in the FROM clause */
-  u8 op, p5;            /* Opcode and P5 of the opcode that ends the loop */
+  u8 op, p3, p5;        /* Opcode, P3 & P5 of the opcode that ends the loop */
  int p1, p2;           /* Operands of the opcode used to ends the loop */
  union {               /* Information that depends on pWLoop->wsFlags */
    struct {
@@ -457,3 +457,4 @@ struct WhereInfo {
 #define WHERE_MULTI_OR     0x00002000  /* OR using multiple indices */
 #define WHERE_AUTO_INDEX   0x00004000  /* Uses an ephemeral index */
 #define WHERE_SKIPSCAN     0x00008000  /* Uses the skip-scan algorithm */
+#define WHERE_UNQ_WANTED   0x00010000  /* WHERE_ONEROW would have been helpful*/
@@ -179,16 +179,18 @@ do_test capi3-3.4 {
 do_test capi3-3.5 {
  sqlite3_close $db2
 } {SQLITE_OK}
-do_test capi3-3.6.1-misuse {
-  sqlite3_close $db2
-} {SQLITE_MISUSE}
-do_test capi3-3.6.2-misuse {
-  sqlite3_errmsg $db2
-} {library routine called out of sequence}
-ifcapable {utf16} {
-  do_test capi3-3.6.3-misuse {
-    utf8 [sqlite3_errmsg16 $db2]
+if {[clang_sanitize_address]==0} {
+  do_test capi3-3.6.1-misuse {
+    sqlite3_close $db2
+  } {SQLITE_MISUSE}
+  do_test capi3-3.6.2-misuse {
+    sqlite3_errmsg $db2
  } {library routine called out of sequence}
+  ifcapable {utf16} {
+    do_test capi3-3.6.3-misuse {
+      utf8 [sqlite3_errmsg16 $db2]
+    } {library routine called out of sequence}
+  }
 }

 do_test capi3-3.7 {
@@ -661,10 +663,12 @@ do_test capi3-6.3 {
  sqlite3_finalize $STMT
 } {SQLITE_OK}

-do_test capi3-6.4-misuse {
-  db cache flush
-  sqlite3_close $DB
-} {SQLITE_OK}
+if {[clang_sanitize_address]==0} {
+  do_test capi3-6.4-misuse {
+    db cache flush
+    sqlite3_close $DB
+  } {SQLITE_OK}
+}
 db close

 # This procedure sets the value of the file-format in file 'test.db'
@@ -1060,11 +1064,13 @@ if {[llength [info commands sqlite3_sleep]]>0} {
 }

 # Ticket #1219:  Make sure binding APIs can handle a NULL pointer.
-#
-do_test capi3-14.1-misuse {
-  set rc [catch {sqlite3_bind_text 0 1 hello 5} msg]
-  lappend rc $msg
-} {1 SQLITE_MISUSE}
+# 
+if {[clang_sanitize_address]==0} {
+  do_test capi3-14.1-misuse {
+    set rc [catch {sqlite3_bind_text 0 1 hello 5} msg]
+      lappend rc $msg
+  } {1 SQLITE_MISUSE}
+}

 # Ticket #1650:  Honor the nBytes parameter to sqlite3_prepare.
 #
@@ -169,16 +169,18 @@ do_test capi3c-3.4 {
 do_test capi3c-3.5 {
  sqlite3_close $db2
 } {SQLITE_OK}
-do_test capi3c-3.6.1-misuse {
-  sqlite3_close $db2
-} {SQLITE_MISUSE}
-do_test capi3c-3.6.2-misuse {
-  sqlite3_errmsg $db2
-} {library routine called out of sequence}
-ifcapable {utf16} {
-  do_test capi3c-3.6.3-misuse {
-    utf8 [sqlite3_errmsg16 $db2]
+if {[clang_sanitize_address]==0} {
+  do_test capi3c-3.6.1-misuse {
+    sqlite3_close $db2
+  } {SQLITE_MISUSE}
+  do_test capi3c-3.6.2-misuse {
+    sqlite3_errmsg $db2
  } {library routine called out of sequence}
+  ifcapable {utf16} {
+    do_test capi3c-3.6.3-misuse {
+      utf8 [sqlite3_errmsg16 $db2]
+    } {library routine called out of sequence}
+  }
 }

 # rename sqlite3_open ""
@@ -627,13 +629,17 @@ check_data $STMT capi3c-6.3 {INTEGER} {1} {1.0} {1}
 do_test capi3c-6.3 {
  sqlite3_finalize $STMT
 } {SQLITE_OK}
-do_test capi3c-6.4 {
-  db cache flush
-  sqlite3_close $DB
-} {SQLITE_OK}
-do_test capi3c-6.99-misuse {
+if {[clang_sanitize_address]==0} {
+  do_test capi3c-6.4 {
+    db cache flush
+      sqlite3_close $DB
+  } {SQLITE_OK}
+  do_test capi3c-6.99-misuse {
+    db close
+  } {}
+} else {
  db close
-} {}
+}

 # This procedure sets the value of the file-format in file 'test.db'
 # to $newval. Also, the schema cookie is incremented.
@@ -15,51 +15,68 @@ set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 set testprefix closure01

-ifcapable !vtab { finish_test ; return }
+ifcapable !vtab||!cte { finish_test ; return }

 load_static_extension db closure

 do_execsql_test 1.0 {
  BEGIN;
  CREATE TABLE t1(x INTEGER PRIMARY KEY, y INTEGER);
+  WITH RECURSIVE
+    cnt(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM cnt LIMIT 131072)
+  INSERT INTO t1(x, y) SELECT i, nullif(i,1)/2 FROM cnt;
  CREATE INDEX t1y ON t1(y);
-  INSERT INTO t1(x) VALUES(1),(2);
-  INSERT INTO t1(x) SELECT x+2 FROM t1;
-  INSERT INTO t1(x) SELECT x+4 FROM t1;
-  INSERT INTO t1(x) SELECT x+8 FROM t1;
-  INSERT INTO t1(x) SELECT x+16 FROM t1;
-  INSERT INTO t1(x) SELECT x+32 FROM t1;
-  INSERT INTO t1(x) SELECT x+64 FROM t1;
-  INSERT INTO t1(x) SELECT x+128 FROM t1;
-  INSERT INTO t1(x) SELECT x+256 FROM t1;
-  INSERT INTO t1(x) SELECT x+512 FROM t1;
-  INSERT INTO t1(x) SELECT x+1024 FROM t1;
-  INSERT INTO t1(x) SELECT x+2048 FROM t1;
-  INSERT INTO t1(x) SELECT x+4096 FROM t1;
-  INSERT INTO t1(x) SELECT x+8192 FROM t1;
-  INSERT INTO t1(x) SELECT x+16384 FROM t1;
-  INSERT INTO t1(x) SELECT x+32768 FROM t1;
-  INSERT INTO t1(x) SELECT x+65536 FROM t1;
-  UPDATE t1 SET y=x/2 WHERE x>1;
  COMMIT;
  CREATE VIRTUAL TABLE cx 
   USING transitive_closure(tablename=t1, idcolumn=x, parentcolumn=y);
 } {}

 # The entire table
-do_execsql_test 1.1 {
+do_timed_execsql_test 1.1 {
  SELECT count(*), depth FROM cx WHERE root=1 GROUP BY depth ORDER BY 1;
 } {/1 0 1 17 2 1 4 2 8 3 16 4 .* 65536 16/}
+do_timed_execsql_test 1.1-cte {
+  WITH RECURSIVE
+    below(id,depth) AS (
+      VALUES(1,0)
+       UNION ALL
+      SELECT t1.x, below.depth+1
+        FROM t1 JOIN below on t1.y=below.id
+    )
+  SELECT count(*), depth FROM below GROUP BY depth ORDER BY 1;
+} {/1 0 1 17 2 1 4 2 8 3 16 4 .* 65536 16/}

 # descendents of 32768
-do_execsql_test 1.2 {
+do_timed_execsql_test 1.2 {
  SELECT * FROM cx WHERE root=32768 ORDER BY id;
 } {32768 0 65536 1 65537 1 131072 2}
+do_timed_execsql_test 1.2-cte {
+  WITH RECURSIVE
+    below(id,depth) AS (
+      VALUES(32768,0)
+       UNION ALL
+      SELECT t1.x, below.depth+1
+        FROM t1 JOIN below on t1.y=below.id
+       WHERE below.depth<2
+    )
+  SELECT id, depth FROM below ORDER BY id;
+} {32768 0 65536 1 65537 1 131072 2}

 # descendents of 16384
-do_execsql_test 1.3 {
+do_timed_execsql_test 1.3 {
  SELECT * FROM cx WHERE root=16384 AND depth<=2 ORDER BY id;
 } {16384 0 32768 1 32769 1 65536 2 65537 2 65538 2 65539 2}
+do_timed_execsql_test 1.3-cte {
+  WITH RECURSIVE
+    below(id,depth) AS (
+      VALUES(16384,0)
+       UNION ALL
+      SELECT t1.x, below.depth+1
+        FROM t1 JOIN below on t1.y=below.id
+       WHERE below.depth<2
+    )
+  SELECT id, depth FROM below ORDER BY id;
+} {16384 0 32768 1 32769 1 65536 2 65537 2 65538 2 65539 2}

 # children of 16384
 do_execsql_test 1.4 {
@@ -70,19 +87,41 @@ do_execsql_test 1.4 {
 } {32768 1 {} t1 x y 32769 1 {} t1 x y}

 # great-grandparent of 16384
-do_execsql_test 1.5 {
+do_timed_execsql_test 1.5 {
  SELECT id, depth, root, tablename, idcolumn, parentcolumn FROM cx
   WHERE root=16384
     AND depth=3
     AND idcolumn='Y'
     AND parentcolumn='X';
 } {2048 3 {} t1 Y X}
+do_timed_execsql_test 1.5-cte {
+  WITH RECURSIVE
+    above(id,depth) AS (
+      VALUES(16384,0)
+      UNION ALL
+      SELECT t1.y, above.depth+1
+        FROM t1 JOIN above ON t1.x=above.id
+       WHERE above.depth<3
+    )
+  SELECT id FROM above WHERE depth=3;
+} {2048}

 # depth<5
-do_execsql_test 1.6 {
+do_timed_execsql_test 1.6 {
  SELECT count(*), depth FROM cx WHERE root=1 AND depth<5
   GROUP BY depth ORDER BY 1;
 } {1 0 2 1 4 2 8 3 16 4}
+do_timed_execsql_test 1.6-cte {
+  WITH RECURSIVE
+    below(id,depth) AS (
+      VALUES(1,0)
+      UNION ALL
+      SELECT t1.x, below.depth+1
+        FROM t1 JOIN below ON t1.y=below.id
+       WHERE below.depth<4
+    )
+  SELECT count(*), depth FROM below GROUP BY depth ORDER BY 1;
+} {1 0 2 1 4 2 8 3 16 4}

 # depth<=5
 do_execsql_test 1.7 {
@@ -103,9 +142,20 @@ do_execsql_test 1.9 {
 } {8 3 16 4 32 5}

 # depth==5 with min() and max()
-do_execsql_test 1.10 {
+do_timed_execsql_test 1.10 {
  SELECT count(*), min(id), max(id) FROM cx WHERE root=1 AND depth=5;
 } {32 32 63}
+do_timed_execsql_test 1.10-cte {
+  WITH RECURSIVE
+    below(id,depth) AS (
+      VALUES(1,0)
+      UNION ALL
+      SELECT t1.x, below.depth+1
+        FROM t1 JOIN below ON t1.y=below.id
+       WHERE below.depth<5
+    )
+  SELECT count(*), min(id), max(id) FROM below WHERE depth=5;
+} {32 32 63}

 # Create a much smaller table t2 with only 32 elements 
 db eval {
@@ -66,6 +66,7 @@ reset_db
 # Initialize the database.
 #
 do_execsql_test 2.1 {
+  PRAGMA auto_vacuum=0;
  PRAGMA page_size=1024;

  CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
@@ -95,8 +96,31 @@ do_test 2.2 {
  sqlite3 db test.db
 } {}

+
+# The corruption migration caused by the test case below does not 
+# cause corruption to be detected in mmap mode.
+#
+# The trick here is that the root page of the tree scanned by the outer 
+# query is also currently on the free-list. So while the first seek on
+# the table (for a==1) works, by the time the second is attempted The 
+# "INSERT INTO t2..." statements have recycled the root page of t1 and
+# used it as an index leaf. Normally, BtreeMovetoUnpacked() detects
+# that the PgHdr object associated with said root page does not match
+# the cursor (as it is now marked with PgHdr.intKey==0) and returns
+# SQLITE_CORRUPT. 
+#
+# However, in mmap mode, the outer query and the inner queries use 
+# different PgHdr objects (same data, but different PgHdr container 
+# objects). And so the corruption is not detected. Instead, the second
+# seek fails to find anything and only a single row is returned.
+#
+set res23 {1 {database disk image is malformed}}
+if {[permutation]=="mmap"} {
+  set res23 {0 one}
+}
 do_test 2.3 {
  list [catch {
+  set res [list]
  db eval { SELECT * FROM t1 WHERE a IN (1, 2) } {
    db eval { 
      INSERT INTO t2 SELECT randomblob(100) FROM t2;
@@ -105,9 +129,11 @@ do_test 2.3 {
      INSERT INTO t2 SELECT randomblob(100) FROM t2;
      INSERT INTO t2 SELECT randomblob(100) FROM t2;
    }
+    lappend res $b
  }
+  set res
  } msg] $msg
-} {1 {database disk image is malformed}}
+} $res23

 #-------------------------------------------------------------------------
 reset_db
@@ -2946,38 +2946,45 @@ proc test_on_update_recursion {limit} {
  "
 }

-do_test e_fkey-63.1.1 {
-  test_on_delete_recursion $SQLITE_MAX_TRIGGER_DEPTH
-} {0 0}
-do_test e_fkey-63.1.2 {
-  test_on_delete_recursion [expr $SQLITE_MAX_TRIGGER_DEPTH+1]
-} {1 {too many levels of trigger recursion}}
-do_test e_fkey-63.1.3 {
-  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 5
-  test_on_delete_recursion 5
-} {0 0}
-do_test e_fkey-63.1.4 {
-  test_on_delete_recursion 6
-} {1 {too many levels of trigger recursion}}
-do_test e_fkey-63.1.5 {
-  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000000
-} {5}
-do_test e_fkey-63.2.1 {
-  test_on_update_recursion $SQLITE_MAX_TRIGGER_DEPTH
-} {0 0}
-do_test e_fkey-63.2.2 {
-  test_on_update_recursion [expr $SQLITE_MAX_TRIGGER_DEPTH+1]
-} {1 {too many levels of trigger recursion}}
-do_test e_fkey-63.2.3 {
-  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 5
-  test_on_update_recursion 5
-} {0 0}
-do_test e_fkey-63.2.4 {
-  test_on_update_recursion 6
-} {1 {too many levels of trigger recursion}}
-do_test e_fkey-63.2.5 {
-  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000000
-} {5}
+# If the current build was created using clang with the -fsanitize=address
+# switch, then the library uses considerably more stack space than usual.
+# So much more, that some of the following tests cause stack overflows
+# if they are run under this configuration.
+#
+if {[clang_sanitize_address]==0} {
+  do_test e_fkey-63.1.1 {
+    test_on_delete_recursion $SQLITE_MAX_TRIGGER_DEPTH
+  } {0 0}
+  do_test e_fkey-63.1.2 {
+    test_on_delete_recursion [expr $SQLITE_MAX_TRIGGER_DEPTH+1]
+  } {1 {too many levels of trigger recursion}}
+  do_test e_fkey-63.1.3 {
+    sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 5
+      test_on_delete_recursion 5
+  } {0 0}
+  do_test e_fkey-63.1.4 {
+    test_on_delete_recursion 6
+  } {1 {too many levels of trigger recursion}}
+  do_test e_fkey-63.1.5 {
+    sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000000
+  } {5}
+  do_test e_fkey-63.2.1 {
+    test_on_update_recursion $SQLITE_MAX_TRIGGER_DEPTH
+  } {0 0}
+  do_test e_fkey-63.2.2 {
+    test_on_update_recursion [expr $SQLITE_MAX_TRIGGER_DEPTH+1]
+  } {1 {too many levels of trigger recursion}}
+  do_test e_fkey-63.2.3 {
+    sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 5
+      test_on_update_recursion 5
+  } {0 0}
+  do_test e_fkey-63.2.4 {
+    test_on_update_recursion 6
+  } {1 {too many levels of trigger recursion}}
+  do_test e_fkey-63.2.5 {
+    sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000000
+  } {5}
+}

 #-------------------------------------------------------------------------
 # The setting of the recursive_triggers pragma does not affect foreign
@@ -333,9 +333,9 @@ do_select_tests e_select-1.1 {
  6 "SELECT count(*) WHERE 1" {1}
 }

-# EVIDENCE-OF: R-48114-33255 If there is only a single table in the
-# join-source following the FROM clause, then the input data used by the
-# SELECT statement is the contents of the named table.
+# EVIDENCE-OF: R-45424-07352 If there is only a single table or subquery
+# in the FROM clause, then the input data used by the SELECT statement
+# is the contents of the named table.
 #
 #   The results of the SELECT queries suggest that they are operating on the
 #   contents of the table 'xx'.
@@ -357,10 +357,10 @@ do_select_tests e_select-1.2 {
  3  "SELECT sum(x), sum(y) FROM xx"               {-17.89 -16.87}
 }

-# EVIDENCE-OF: R-23593-12456 If there is more than one table specified
-# as part of the join-source following the FROM keyword, then the
-# contents of each named table are joined into a single dataset for the
-# simple SELECT statement to operate on.
+# EVIDENCE-OF: R-28355-09804 If there is more than one table or subquery
+# in FROM clause then the contents of all tables and/or subqueries are
+# joined into a single dataset for the simple SELECT statement to
+# operate on.
 #
 #   There are more detailed tests for subsequent requirements that add 
 #   more detail to this idea. We just add a single test that shows that
@@ -383,10 +383,10 @@ do_select_tests e_select-1.3 {
 # of cartesian joins in the SELECT documentation is consistent with SQLite.
 # In doing so, we test the following three requirements as a side-effect:
 #
-# EVIDENCE-OF: R-46122-14930 If the join-op is "CROSS JOIN", "INNER
-# JOIN", "JOIN" or a comma (",") and there is no ON or USING clause,
-# then the result of the join is simply the cartesian product of the
-# left and right-hand datasets.
+# EVIDENCE-OF: R-49872-03192 If the join-operator is "CROSS JOIN",
+# "INNER JOIN", "JOIN" or a comma (",") and there is no ON or USING
+# clause, then the result of the join is simply the cartesian product of
+# the left and right-hand datasets.
 #
 #    The tests are built on this assertion. Really, they test that the output
 #    of a CROSS JOIN, JOIN, INNER JOIN or "," join matches the expected result
@@ -464,10 +464,10 @@ do_join_test e_select-1.4.2.1 {
 ]
 # TODO: Come back and add a few more like the above.

-# EVIDENCE-OF: R-20659-43267 In other words, if the left-hand dataset
-# consists of Nlhs rows of Mlhs columns, and the right-hand dataset of
-# Nrhs rows of Mrhs columns, then the cartesian product is a dataset of
-# Nlhs.Nrhs rows, each containing Mlhs+Mrhs columns.
+# EVIDENCE-OF: R-18439-38548 In other words, if the left-hand dataset
+# consists of Nleft rows of Mleft columns, and the right-hand dataset of
+# Nright rows of Mright columns, then the cartesian product is a dataset
+# of Nleft&times;Nright rows, each containing Mleft+Mright columns.
 #
 # x1, x2    (Nlhs=3, Nrhs=2)   (Mlhs=2, Mrhs=3)
 do_join_test e_select-1.4.3.1 { 
@@ -513,11 +513,10 @@ do_select_tests e_select-1.4.5 [list                                   \
    4 { SELECT * FROM t1 AS y INNER JOIN t1 AS x } $t1_cross_t1        \
 ]

-
-# EVIDENCE-OF: R-22775-56496 If there is an ON clause specified, then
-# the ON expression is evaluated for each row of the cartesian product
-# as a boolean expression. All rows for which the expression evaluates
-# to false are excluded from the dataset.
+# EVIDENCE-OF: R-38465-03616 If there is an ON clause then the ON
+# expression is evaluated for each row of the cartesian product as a
+# boolean expression. Only rows for which the expression evaluates to
+# true are included from the dataset.
 #
 foreach {tn select res} [list                                              \
    1 { SELECT * FROM t1 %JOIN% t2 ON (1) }       $t1_cross_t2             \
@@ -540,9 +539,9 @@ foreach {tn select res} [list                                              \
  do_join_test e_select-1.3.$tn $select $res
 }

-# EVIDENCE-OF: R-63358-54862 If there is a USING clause specified as
-# part of the join-constraint, then each of the column names specified
-# must exist in the datasets to both the left and right of the join-op.
+# EVIDENCE-OF: R-49933-05137 If there is a USING clause then each of the
+# column names specified must exist in the datasets to both the left and
+# right of the join-operator.
 #
 do_select_tests e_select-1.4 -error {
  cannot join using column %s - column not present in both tables
@@ -552,10 +551,10 @@ do_select_tests e_select-1.4 -error {
  3 { SELECT * FROM t3, (SELECT a AS b, b AS c FROM t1) USING (a) }   "a"
 } 

-# EVIDENCE-OF: R-55987-04584 For each pair of namesake columns, the
+# EVIDENCE-OF: R-22776-52830 For each pair of named columns, the
 # expression "lhs.X = rhs.X" is evaluated for each row of the cartesian
-# product as a boolean expression. All rows for which one or more of the
-# expressions evaluates to false are excluded from the result set.
+# product as a boolean expression. Only rows for which all such
+# expressions evaluates to true are included from the result set.
 #
 do_select_tests e_select-1.5 {
  1 { SELECT * FROM t1, t3 USING (a)   }  {a one 1 b two 2}
@@ -566,8 +565,8 @@ do_select_tests e_select-1.5 {
 # USING clause, the normal rules for handling affinities, collation
 # sequences and NULL values in comparisons apply.
 #
-# EVIDENCE-OF: R-35466-18578 The column from the dataset on the
-# left-hand side of the join operator is considered to be on the
+# EVIDENCE-OF: R-38422-04402 The column from the dataset on the
+# left-hand side of the join-operator is considered to be on the
 # left-hand side of the comparison operator (=) for the purposes of
 # collation sequence and affinity precedence.
 #
@@ -622,10 +621,9 @@ foreach {tn select res} {
 } {
  do_join_test e_select-1.7.$tn $select $res
 }
-
-# EVIDENCE-OF: R-41434-12448 If the join-op is a "LEFT JOIN" or "LEFT
-# OUTER JOIN", then after the ON or USING filtering clauses have been
-# applied, an extra row is added to the output for each row in the
+# EVIDENCE-OF: R-42531-52874 If the join-operator is a "LEFT JOIN" or
+# "LEFT OUTER JOIN", then after the ON or USING filtering clauses have
+# been applied, an extra row is added to the output for each row in the
 # original left-hand input dataset that corresponds to no rows at all in
 # the composite dataset (if any).
 #
@@ -660,8 +658,8 @@ do_select_tests e_select-1.9 {
  2b "SELECT * FROM t7 LEFT JOIN t8 USING (a)" {x ex 24 abc 24 y why 25 {} {}}
 }

-# EVIDENCE-OF: R-01809-52134 If the NATURAL keyword is added to any of
-# the join-ops, then an implicit USING clause is added to the
+# EVIDENCE-OF: R-04932-55942 If the NATURAL keyword is in the
+# join-operator then an implicit USING clause is added to the
 # join-constraints. The implicit USING clause contains each of the
 # column names that appear in both the left and right-hand input
 # datasets.
@@ -734,10 +732,10 @@ do_execsql_test e_select-3.0 {
  INSERT INTO x2 VALUES(7, 'mistrusted', 'standardized');
 } {}

-# EVIDENCE-OF: R-06999-14330 If a WHERE clause is specified, the WHERE
+# EVIDENCE-OF: R-60775-64916 If a WHERE clause is specified, the WHERE
 # expression is evaluated for each row in the input data as a boolean
-# expression. All rows for which the WHERE clause expression evaluates
-# to false are excluded from the dataset before continuing.
+# expression. Only rows for which the WHERE clause expression evaluates
+# to true are included from the dataset before continuing.
 #
 do_execsql_test e_select-3.1.1 { SELECT k FROM x1 WHERE x }         {3}
 do_execsql_test e_select-3.1.2 { SELECT k FROM x1 WHERE y }         {3 5 6}
@@ -815,8 +813,8 @@ do_select_tests e_select-4.1 {
  }
 }

-# EVIDENCE-OF: R-61869-22578 It is an error to use a "*" or "alias.*"
-# expression in any context other than than a result expression list.
+# EVIDENCE-OF: R-38023-18396 It is an error to use a "*" or "alias.*"
+# expression in any context other than a result expression list.
 #
 # EVIDENCE-OF: R-44324-41166 It is also an error to use a "*" or
 # "alias.*" expression in a simple SELECT query that does not have a
@@ -1009,12 +1007,12 @@ do_execsql_test e_select-4.9.0 {
  INSERT INTO b3 VALUES('dEF', 'dEF');
 } {}

-# EVIDENCE-OF: R-57754-57109 If the SELECT statement is an aggregate
+# EVIDENCE-OF: R-07284-35990 If the SELECT statement is an aggregate
 # query with a GROUP BY clause, then each of the expressions specified
 # as part of the GROUP BY clause is evaluated for each row of the
 # dataset. Each row is then assigned to a "group" based on the results;
 # rows for which the results of evaluating the GROUP BY expressions are
-# the same are assigned to the same group.
+# the same get assigned to the same group.
 #
 #   These tests also show that the following is not untrue:
 #
@@ -1373,8 +1371,9 @@ foreach {tn select op1 op2} {
  do_catchsql_test e_select-7.2.$tn $select [list 1 $err]
 }

-# EVIDENCE-OF: R-22874-32655 ORDER BY and LIMIT clauses may only occur
-# at the end of the entire compound SELECT.
+# EVIDENCE-OF: R-45440-25633 ORDER BY and LIMIT clauses may only occur
+# at the end of the entire compound SELECT, and then only if the final
+# element of the compound is not a VALUES clause.
 #
 foreach {tn select} {
  1   "SELECT * FROM j1 UNION ALL SELECT * FROM j2,j3 ORDER BY a"
@@ -1386,6 +1385,7 @@ foreach {tn select} {

  7   "SELECT * FROM j1 UNION SELECT * FROM j2,j3 ORDER BY a"
  8   "SELECT count(*) FROM j1 UNION SELECT max(e) FROM j2 ORDER BY 1"
+  8b  "VALUES('8b') UNION SELECT max(e) FROM j2 ORDER BY 1"
  9   "SELECT count(*), * FROM j1 UNION SELECT *,* FROM j2 ORDER BY 1,2,3"
  10  "SELECT * FROM j1 UNION SELECT * FROM j2,j3 LIMIT 10" 
  11  "SELECT * FROM j1 UNION SELECT * FROM j2,j3 LIMIT 10 OFFSET 5" 
@@ -1407,6 +1407,14 @@ foreach {tn select} {
 } {
  do_test e_select-7.3.$tn { catch {execsql $select} msg } 0
 }
+foreach {tn select} {
+  50   "SELECT * FROM j1 ORDER BY 1 UNION ALL SELECT * FROM j2,j3"
+  51   "SELECT * FROM j1 LIMIT 1 UNION ALL SELECT * FROM j2,j3"
+  52   "SELECT count(*) FROM j1 UNION ALL VALUES(11) ORDER BY 1"
+  53   "SELECT count(*) FROM j1 UNION ALL VALUES(11) LIMIT 1"
+} {
+  do_test e_select-7.3.$tn { catch {execsql $select} msg } 1
+}

 # EVIDENCE-OF: R-08531-36543 A compound SELECT created using UNION ALL
 # operator returns all the rows from the SELECT to the left of the UNION
@@ -344,10 +344,10 @@ foreach {tn indexes} {
  catchsql { DROP INDEX i3 }
  execsql $indexes

-  # EVIDENCE-OF: R-46122-14930 If the join-op is "CROSS JOIN", "INNER
-  # JOIN", "JOIN" or a comma (",") and there is no ON or USING clause,
-  # then the result of the join is simply the cartesian product of the
-  # left and right-hand datasets.
+  # EVIDENCE-OF: R-49872-03192 If the join-operator is "CROSS JOIN",
+  # "INNER JOIN", "JOIN" or a comma (",") and there is no ON or USING
+  # clause, then the result of the join is simply the cartesian product of
+  # the left and right-hand datasets.
  #
  # EVIDENCE-OF: R-46256-57243 There is no difference between the "INNER
  # JOIN", "JOIN" and "," join operators.
@@ -368,10 +368,10 @@ foreach {tn indexes} {
  test_join $tn.1.11 "t2 CROSS JOIN t2 AS x" {t2 t2}
  test_join $tn.1.12 "t2 JOIN t2 AS x"       {t2 t2}

-  # EVIDENCE-OF: R-22775-56496 If there is an ON clause specified, then
-  # the ON expression is evaluated for each row of the cartesian product
-  # as a boolean expression. All rows for which the expression evaluates
-  # to false are excluded from the dataset.
+  # EVIDENCE-OF: R-38465-03616 If there is an ON clause then the ON
+  # expression is evaluated for each row of the cartesian product as a
+  # boolean expression. Only rows for which the expression evaluates to
+  # true are included from the dataset.
  #
  test_join $tn.2.1  "t1, t2 ON (t1.a=t2.a)"  {t1 t2 -on {te_equals a a}}
  test_join $tn.2.2  "t2, t1 ON (t1.a=t2.a)"  {t2 t1 -on {te_equals a a}}
@@ -504,14 +504,14 @@ do_execsql_test e_select-2.2.0 {
  INSERT INTO t5 VALUES(2, 'two');
 } {}

-# EVIDENCE-OF: R-55824-40976 A sub-select specified in the join-source
-# following the FROM clause in a simple SELECT statement is handled as
-# if it was a table containing the data returned by executing the
-# sub-select statement.
+# EVIDENCE-OF: R-59237-46742 A subquery specified in the
+# table-or-subquery following the FROM clause in a simple SELECT
+# statement is handled as if it was a table containing the data returned
+# by executing the subquery statement.
 #
-# EVIDENCE-OF: R-42612-06757 Each column of the sub-select dataset
-# inherits the collation sequence and affinity of the corresponding
-# expression in the sub-select statement.
+# EVIDENCE-OF: R-27438-53558 Each column of the subquery has the
+# collation sequence and affinity of the corresponding expression in the
+# subquery statement.
 #
 foreach {tn subselect select spec} {
  1   "SELECT * FROM t2"   "SELECT * FROM t1 JOIN %ss%" 
@@ -15,9 +15,11 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl

-do_test misc7-1-misuse {
-  c_misuse_test
-} {}
+if {[clang_sanitize_address]==0} {
+  do_test misc7-1-misuse {
+    c_misuse_test
+  } {}
+}

 do_test misc7-2 {
  c_realloc_test
@@ -171,37 +171,40 @@ do_test misuse-4.3 {
  } msg]
  lappend v $msg $r
 } {0 {} SQLITE_BUSY}
-do_test misuse-4.4 {
+
+if {[clang_sanitize_address]==0} {
+  do_test misuse-4.4 {
  # Flush the TCL statement cache here, otherwise the sqlite3_close() will
  # fail because there are still un-finalized() VDBEs.
-  db cache flush
-  sqlite3_close $::DB
-  catchsql2 {SELECT * FROM t1}
-} {1 {library routine called out of sequence}}
-do_test misuse-4.5 {
-  catchsql {
-    SELECT * FROM t1
-  }
-} {1 {library routine called out of sequence}}
+    db cache flush
+      sqlite3_close $::DB
+      catchsql2 {SELECT * FROM t1}
+  } {1 {library routine called out of sequence}}
+  do_test misuse-4.5 {
+    catchsql {
+      SELECT * FROM t1
+    }
+  } {1 {library routine called out of sequence}}

-# Attempt to use a database after it has been closed.
-#
-do_test misuse-5.1 {
-  db close
-  sqlite3 db test2.db; set ::DB [sqlite3_connection_pointer db]
-  execsql {
-    SELECT * FROM t1
-  }
-} {1 2}
-do_test misuse-5.2 {
-  catchsql2 {SELECT * FROM t1}
-} {0 {a b 1 2}}
-do_test misuse-5.3 {
-  db close
-  set r [catch {
-    sqlite3_prepare $::DB {SELECT * FROM t1} -1 TAIL
-  } msg]
-  lappend r $msg
-} {1 {(21) library routine called out of sequence}}
+  # Attempt to use a database after it has been closed.
+  #
+  do_test misuse-5.1 {
+    db close
+      sqlite3 db test2.db; set ::DB [sqlite3_connection_pointer db]
+      execsql {
+        SELECT * FROM t1
+      }
+  } {1 2}
+  do_test misuse-5.2 {
+    catchsql2 {SELECT * FROM t1}
+  } {0 {a b 1 2}}
+  do_test misuse-5.3 {
+    db close
+      set r [catch {
+        sqlite3_prepare $::DB {SELECT * FROM t1} -1 TAIL
+      } msg]
+    lappend r $msg
+  } {1 {(21) library routine called out of sequence}}
+}

 finish_test
@@ -9,7 +9,7 @@
 #
 #***********************************************************************
 #
-# Tests for the SQLITE_IOERR_NODB error condition: the database file file
+# Tests for the SQLITE_READONLY_DBMOVED error condition: the database file
 # is unlinked or renamed out from under SQLite.
 #

@@ -18,6 +18,11 @@ if {$tcl_platform(platform)!="unix"} return
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl

+if {[permutation]=="inmemory_journal"} {
+  finish_test
+  return
+}
+
 # Create a database file for testing
 #
 do_execsql_test pager4-1.1 {
@@ -1544,5 +1544,6 @@ do_faultsim_test pagerfault-36 -prep {

 sqlite3_shutdown
 sqlite3_config_uri 0
+sqlite3_initialize

 finish_test
@@ -642,7 +642,7 @@ test_suite "inmemory_journal" -description {
  ioerr.test ioerr2.test ioerr3.test ioerr4.test ioerr5.test
  vacuum3.test incrblob_err.test diskfull.test backup_ioerr.test
  e_fts3.test fts3cov.test fts3malloc.test fts3rnd.test
-  fts3snippet.test
+  fts3snippet.test mmapfault.test

  # Exclude test scripts that use tcl IO to access journal files or count
  # the number of fsync() calls.
@@ -59,7 +59,7 @@ do_execsql_test printf2-1.11 {
  SELECT printf('%lld%n',314159.2653,'hi');
 } {314159}

-# EVIDENCE-OF: R-20555-31089 The %z format is interchangable with %s.
+# EVIDENCE-OF: R-17002-27534 The %z format is interchangeable with %s.
 #
 do_execsql_test printf2-1.12 {
  SELECT printf('%.*z',5,'abcdefghijklmnop');
@@ -138,21 +138,23 @@ ifcapable {subquery && compound} {
 # Verify that an error occurs if you have too many terms on a
 # compound select statement.
 #
-ifcapable compound {
-  if {$SQLITE_MAX_COMPOUND_SELECT>0} {
-    set sql {SELECT 0}
-    set result 0
-    for {set i 1} {$i<$SQLITE_MAX_COMPOUND_SELECT} {incr i} {
-      append sql " UNION ALL SELECT $i"
-      lappend result $i
+if {[clang_sanitize_address]==0} {
+  ifcapable compound {
+    if {$SQLITE_MAX_COMPOUND_SELECT>0} {
+      set sql {SELECT 0}
+      set result 0
+        for {set i 1} {$i<$SQLITE_MAX_COMPOUND_SELECT} {incr i} {
+          append sql " UNION ALL SELECT $i"
+            lappend result $i
+        }
+      do_test select7-6.1 {
+        catchsql $sql
+      } [list 0 $result]
+      append sql { UNION ALL SELECT 99999999}
+      do_test select7-6.2 {
+        catchsql $sql
+      } {1 {too many terms in compound SELECT}}
    }
-    do_test select7-6.1 {
-      catchsql $sql
-    } [list 0 $result]
-    append sql { UNION ALL SELECT 99999999}
-    do_test select7-6.2 {
-      catchsql $sql
-    } {1 {too many terms in compound SELECT}}
  }
 }

@@ -221,6 +221,53 @@ foreach {tn word res} {
  } $res
 }

+#-------------------------------------------------------------------------
+# Try some queries by rowid.
+#
+do_execsql_test 6.1.1 {
+  SELECT word FROM t3 WHERE rowid = 10;
+} {keener}
+do_execsql_test 6.1.2 {
+  SELECT word, distance FROM t3 WHERE rowid = 10;
+} {keener {}}
+do_execsql_test 6.1.3 {
+  SELECT word, distance FROM t3 WHERE rowid = 10 AND word MATCH 'kiiner';
+} {keener 300}
+
+ifcapable trace {
+  proc trace_callback {sql} {
+    if {[string range $sql 0 2] == "-- "} {
+      lappend ::trace [string range $sql 3 end]
+    }
+  }
+  
+  proc do_tracesql_test {tn sql {res {}}} {
+    set ::trace [list]
+    uplevel [list do_test $tn [subst -nocommands {
+      set vals [execsql {$sql}]
+      concat [set vals] [set ::trace]
+    }] [list {*}$res]]
+  }
+  
+  db trace trace_callback
+  do_tracesql_test 6.2.1 {
+    SELECT word FROM t3 WHERE rowid = 10;
+  } {keener
+    {SELECT word, rank, NULL, langid, id FROM "main"."t3_vocab" WHERE rowid=?}
+  }
+  do_tracesql_test 6.2.2 {
+    SELECT word, distance FROM t3 WHERE rowid = 10;
+  } {keener {}
+    {SELECT word, rank, NULL, langid, id FROM "main"."t3_vocab" WHERE rowid=?}
+  }
+  do_tracesql_test 6.2.3 {
+    SELECT word, distance FROM t3 WHERE rowid = 10 AND word MATCH 'kiiner';
+  } {keener 300
+    {SELECT id, word, rank, k1  FROM "main"."t3_vocab" WHERE langid=0 AND k2>=?1 AND k2<?2}
+  }
+}
+
+


 finish_test
@@ -59,6 +59,7 @@
 #      do_test                TESTNAME SCRIPT EXPECTED
 #      do_execsql_test        TESTNAME SQL EXPECTED
 #      do_catchsql_test       TESTNAME SQL EXPECTED
+#      do_timed_execsql_test  TESTNAME SQL EXPECTED
 #
 # Commands providing a lower level interface to the global test counters:
 #
@@ -717,6 +718,11 @@ proc do_catchsql_test {testname sql result} {
  fix_testname testname
  uplevel do_test [list $testname] [list "catchsql {$sql}"] [list $result]
 }
+proc do_timed_execsql_test {testname sql {result {}}} {
+  fix_testname testname
+  uplevel do_test [list $testname] [list "execsql_timed {$sql}"]\
+                                   [list [list {*}$result]]
+}
 proc do_eqp_test {name sql res} {
  uplevel do_execsql_test $name [list "EXPLAIN QUERY PLAN $sql"] [list $res]
 }
@@ -1013,6 +1019,14 @@ proc execsql {sql {db db}} {
  # puts "SQL = $sql"
  uplevel [list $db eval $sql]
 }
+proc execsql_timed {sql {db db}} {
+  set tm [time {
+    set x [uplevel [list $db eval $sql]]
+  } 1]
+  set tm [lindex $tm 0]
+  puts -nonewline " ([expr {$tm*0.001}]ms) "
+  set x
+}

 # Execute SQL and catch exceptions.
 #
@@ -374,7 +374,7 @@ do_catchsql_test 7.6 {

 # Compute the mandelbrot set using a recursive query
 #
-do_execsql_test 8.1 {
+do_execsql_test 8.1-mandelbrot {
  WITH RECURSIVE
    xaxis(x) AS (VALUES(-2.0) UNION ALL SELECT x+0.05 FROM xaxis WHERE x<1.2),
    yaxis(y) AS (VALUES(-1.0) UNION ALL SELECT y+0.1 FROM yaxis WHERE y<1.0),
@@ -417,7 +417,7 @@ do_execsql_test 8.1 {

 # Solve a sudoku puzzle using a recursive query
 #
-do_execsql_test 8.2 {
+do_execsql_test 8.2-soduko {
  WITH RECURSIVE
    input(sud) AS (
      VALUES('53..7....6..195....98....6.8...6...34..8.3..17...2...6.6....28....419..5....8..79')
@@ -452,4 +452,369 @@ do_execsql_test 8.2 {
  SELECT s FROM x WHERE ind=0;
 } {534678912672195348198342567859761423426853791713924856961537284287419635345286179}

+#--------------------------------------------------------------------------
+# Some tests that use LIMIT and OFFSET in the definition of recursive CTEs.
+# 
+set I [list 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]
+proc limit_test {tn iLimit iOffset} {
+  if {$iOffset < 0} { set iOffset 0 }
+  if {$iLimit < 0 } {
+    set result [lrange $::I $iOffset end]
+  } else {
+    set result [lrange $::I $iOffset [expr $iLimit+$iOffset-1]]
+  }
+  uplevel [list do_execsql_test $tn [subst -nocommands {
+    WITH ii(a) AS (
+      VALUES(1)
+      UNION ALL 
+      SELECT a+1 FROM ii WHERE a<20 
+      LIMIT $iLimit OFFSET $iOffset
+    )
+    SELECT * FROM ii
+  }] $result]
+}
+
+limit_test 9.1    20  0
+limit_test 9.2     0  0
+limit_test 9.3    19  1
+limit_test 9.4    20 -1
+limit_test 9.5     5  5
+limit_test 9.6     0 -1
+limit_test 9.7    40 -1
+limit_test 9.8    -1 -1
+limit_test 9.9    -1 -1
+
+#--------------------------------------------------------------------------
+# Test the ORDER BY clause on recursive tables.
+#
+
+do_execsql_test 10.1 {
+  DROP TABLE IF EXISTS tree;
+  CREATE TABLE tree(id INTEGER PRIMARY KEY, parentid, payload);
+}
+
+proc insert_into_tree {L} {
+  db eval { DELETE FROM tree }
+  foreach key $L {
+    unset -nocomplain parentid
+    foreach seg [split $key /] {
+      if {$seg==""} continue
+      set id [db one {
+        SELECT id FROM tree WHERE parentid IS $parentid AND payload=$seg
+      }]
+      if {$id==""} {
+        db eval { INSERT INTO tree VALUES(NULL, $parentid, $seg) }
+        set parentid [db last_insert_rowid]
+      } else {
+        set parentid $id
+      }
+    }
+  }
+}
+
+insert_into_tree {
+  /a/a/a
+  /a/b/c
+  /a/b/c/d
+  /a/b/d
+}
+do_execsql_test 10.2 {
+  WITH flat(fid, p) AS (
+    SELECT id, '/' || payload FROM tree WHERE parentid IS NULL
+    UNION ALL
+    SELECT id, p || '/' || payload FROM flat, tree WHERE parentid=fid
+  )
+  SELECT p FROM flat ORDER BY p;
+} {
+  /a /a/a /a/a/a 
+     /a/b /a/b/c /a/b/c/d
+          /a/b/d
+}
+
+# Scan the tree-structure currently stored in table tree. Return a list
+# of nodes visited.
+#
+proc scan_tree {bDepthFirst bReverse} {
+
+  set order "ORDER BY "
+  if {$bDepthFirst==0} { append order "2 ASC," }
+  if {$bReverse==0} { 
+    append order " 3 ASC" 
+  } else {
+    append order " 3 DESC" 
+  }
+
+  db eval "
+    WITH flat(fid, depth, p) AS (
+        SELECT id, 1, '/' || payload FROM tree WHERE parentid IS NULL
+        UNION ALL
+        SELECT id, depth+1, p||'/'||payload FROM flat, tree WHERE parentid=fid
+        $order
+    )
+    SELECT p FROM flat;
+  "
+}
+
+insert_into_tree {
+  /a/b
+  /a/b/c
+  /a/d
+  /a/d/e
+  /a/d/f
+  /g/h
+}
+
+# Breadth first, siblings in ascending order.
+#
+do_test 10.3 {
+  scan_tree 0 0
+} [list {*}{
+  /a /g
+  /a/b /a/d /g/h
+  /a/b/c /a/d/e /a/d/f
+}]
+
+# Depth first, siblings in ascending order.
+#
+do_test 10.4 {
+  scan_tree 1 0
+} [list {*}{
+  /a /a/b /a/b/c
+     /a/d /a/d/e 
+          /a/d/f
+  /g /g/h
+}]
+
+# Breadth first, siblings in descending order.
+#
+do_test 10.5 {
+  scan_tree 0 1
+} [list {*}{
+  /g /a 
+  /g/h /a/d /a/b 
+  /a/d/f /a/d/e /a/b/c 
+}]
+
+# Depth first, siblings in ascending order.
+#
+do_test 10.6 {
+  scan_tree 1 1
+} [list {*}{
+  /g /g/h
+  /a /a/d /a/d/f 
+          /a/d/e 
+     /a/b /a/b/c
+}]
+
+
+# Test name resolution in ORDER BY clauses.
+#
+do_catchsql_test 10.7.1 {
+  WITH t(a) AS (
+    SELECT 1 AS b UNION ALL SELECT a+1 AS c FROM t WHERE a<5 ORDER BY a
+  ) 
+  SELECT * FROM t
+} {1 {1st ORDER BY term does not match any column in the result set}}
+do_execsql_test 10.7.2 {
+  WITH t(a) AS (
+    SELECT 1 AS b UNION ALL SELECT a+1 AS c FROM t WHERE a<5 ORDER BY b
+  ) 
+  SELECT * FROM t
+} {1 2 3 4 5}
+do_execsql_test 10.7.3 {
+  WITH t(a) AS (
+    SELECT 1 AS b UNION ALL SELECT a+1 AS c FROM t WHERE a<5 ORDER BY c
+  ) 
+  SELECT * FROM t
+} {1 2 3 4 5}
+
+# Test COLLATE clauses attached to ORDER BY.
+#
+insert_into_tree {
+  /a/b
+  /a/C
+  /a/d
+  /B/e
+  /B/F
+  /B/g
+  /c/h
+  /c/I
+  /c/j
+}
+
+do_execsql_test 10.8.1 {
+  WITH flat(fid, depth, p) AS (
+    SELECT id, 1, '/' || payload FROM tree WHERE parentid IS NULL
+    UNION ALL
+    SELECT id, depth+1, p||'/'||payload FROM flat, tree WHERE parentid=fid
+    ORDER BY 2, 3 COLLATE nocase
+  )
+  SELECT p FROM flat;
+} {
+  /a /B /c
+  /a/b /a/C /a/d /B/e /B/F /B/g /c/h /c/I /c/j
+}
+do_execsql_test 10.8.2 {
+  WITH flat(fid, depth, p) AS (
+      SELECT id, 1, ('/' || payload) COLLATE nocase 
+      FROM tree WHERE parentid IS NULL
+    UNION ALL
+      SELECT id, depth+1, (p||'/'||payload)
+      FROM flat, tree WHERE parentid=fid
+    ORDER BY 2, 3
+  )
+  SELECT p FROM flat;
+} {
+  /a /B /c
+  /a/b /a/C /a/d /B/e /B/F /B/g /c/h /c/I /c/j
+}
+
+do_execsql_test 10.8.3 {
+  WITH flat(fid, depth, p) AS (
+      SELECT id, 1, ('/' || payload)
+      FROM tree WHERE parentid IS NULL
+    UNION ALL
+      SELECT id, depth+1, (p||'/'||payload) COLLATE nocase 
+      FROM flat, tree WHERE parentid=fid
+    ORDER BY 2, 3
+  )
+  SELECT p FROM flat;
+} {
+  /a /B /c
+  /a/b /a/C /a/d /B/e /B/F /B/g /c/h /c/I /c/j
+}
+
+do_execsql_test 10.8.4.1 {
+  CREATE TABLE tst(a,b);
+  INSERT INTO tst VALUES('a', 'A');
+  INSERT INTO tst VALUES('b', 'B');
+  INSERT INTO tst VALUES('c', 'C');
+  SELECT a COLLATE nocase FROM tst UNION ALL SELECT b FROM tst ORDER BY 1;
+} {a A b B c C}
+do_execsql_test 10.8.4.2 {
+  SELECT a FROM tst UNION ALL SELECT b COLLATE nocase FROM tst ORDER BY 1;
+} {A B C a b c}
+do_execsql_test 10.8.4.3 {
+  SELECT a||'' FROM tst UNION ALL SELECT b COLLATE nocase FROM tst ORDER BY 1;
+} {a A b B c C}
+
+# Test cases to illustrate on the ORDER BY clause on a recursive query can be
+# used to control depth-first versus breath-first search in a tree.
+#
+do_execsql_test 11.1 {
+  CREATE TABLE org(
+    name TEXT PRIMARY KEY,
+    boss TEXT REFERENCES org
+  ) WITHOUT ROWID;
+  INSERT INTO org VALUES('Alice',NULL);
+  INSERT INTO org VALUES('Bob','Alice');
+  INSERT INTO org VALUES('Cindy','Alice');
+  INSERT INTO org VALUES('Dave','Bob');
+  INSERT INTO org VALUES('Emma','Bob');
+  INSERT INTO org VALUES('Fred','Cindy');
+  INSERT INTO org VALUES('Gail','Cindy');
+  INSERT INTO org VALUES('Harry','Dave');
+  INSERT INTO org VALUES('Ingrid','Dave');
+  INSERT INTO org VALUES('Jim','Emma');
+  INSERT INTO org VALUES('Kate','Emma');
+  INSERT INTO org VALUES('Lanny','Fred');
+  INSERT INTO org VALUES('Mary','Fred');
+  INSERT INTO org VALUES('Noland','Gail');
+  INSERT INTO org VALUES('Olivia','Gail');
+  -- The above are all under Alice.  Add a few more records for people
+  -- not in Alice's group, just to prove that they won't be selected.
+  INSERT INTO org VALUES('Xaviar',NULL);
+  INSERT INTO org VALUES('Xia','Xaviar');
+  INSERT INTO org VALUES('Xerxes','Xaviar');
+  INSERT INTO org VALUES('Xena','Xia');
+  -- Find all members of Alice's group, breath-first order  
+  WITH RECURSIVE
+    under_alice(name,level) AS (
+       VALUES('Alice','0')
+       UNION ALL
+       SELECT org.name, under_alice.level+1
+         FROM org, under_alice
+        WHERE org.boss=under_alice.name
+        ORDER BY 2
+    )
+  SELECT group_concat(substr('...............',1,level*3) || name,x'0a')
+    FROM under_alice;
+} {{Alice
+...Bob
+...Cindy
+......Dave
+......Emma
+......Fred
+......Gail
+.........Harry
+.........Ingrid
+.........Jim
+.........Kate
+.........Lanny
+.........Mary
+.........Noland
+.........Olivia}}
+
+# The previous query used "ORDER BY level" to yield a breath-first search.
+# Change that to "ORDER BY level DESC" for a depth-first search.
+#
+do_execsql_test 11.2 {
+  WITH RECURSIVE
+    under_alice(name,level) AS (
+       VALUES('Alice','0')
+       UNION ALL
+       SELECT org.name, under_alice.level+1
+         FROM org, under_alice
+        WHERE org.boss=under_alice.name
+        ORDER BY 2 DESC
+    )
+  SELECT group_concat(substr('...............',1,level*3) || name,x'0a')
+    FROM under_alice;
+} {{Alice
+...Bob
+......Dave
+.........Harry
+.........Ingrid
+......Emma
+.........Jim
+.........Kate
+...Cindy
+......Fred
+.........Lanny
+.........Mary
+......Gail
+.........Noland
+.........Olivia}}
+
+# Without an ORDER BY clause, the recursive query should use a FIFO,
+# resulting in a breath-first search.
+#
+do_execsql_test 11.3 {
+  WITH RECURSIVE
+    under_alice(name,level) AS (
+       VALUES('Alice','0')
+       UNION ALL
+       SELECT org.name, under_alice.level+1
+         FROM org, under_alice
+        WHERE org.boss=under_alice.name
+    )
+  SELECT group_concat(substr('...............',1,level*3) || name,x'0a')
+    FROM under_alice;
+} {{Alice
+...Bob
+...Cindy
+......Dave
+......Emma
+......Fred
+......Gail
+.........Harry
+.........Ingrid
+.........Jim
+.........Kate
+.........Lanny
+.........Mary
+.........Noland
+.........Olivia}}
+
 finish_test
+
@@ -190,6 +190,7 @@ proc main {argv} {
    SQLITE_OMIT_COMPILEOPTION_DIAGS \
    SQLITE_OMIT_COMPLETE \
    SQLITE_OMIT_COMPOUND_SELECT \
+    SQLITE_OMIT_CTE \
    SQLITE_OMIT_DATETIME_FUNCS \
    SQLITE_OMIT_DECLTYPE \
    SQLITE_OMIT_DEPRECATED \
@@ -119,7 +119,7 @@ static unsigned char *print_byte_range(
 /*
 ** Print an entire page of content as hex
 */
-static print_page(int iPg){
+static void print_page(int iPg){
  int iStart;
  unsigned char *aData;
  iStart = (iPg-1)*pagesize;
@@ -131,7 +131,7 @@ static print_page(int iPg){

 /* Print a line of decode output showing a 4-byte integer.
 */
-static print_decode_line(
+static void print_decode_line(
  unsigned char *aData,      /* Content being decoded */
  int ofst, int nByte,       /* Start and size of decode */
  const char *zMsg           /* Message to append */
@@ -428,7 +428,7 @@ static void decode_trunk_page(
  int detail,           /* Show leaf pages if true */
  int recursive         /* Follow the trunk change if true */
 ){
-  int n, i, k;
+  int n, i;
  unsigned char *a;
  while( pgno>0 ){
    a = getContent((pgno-1)*pagesize, pagesize);
@@ -495,7 +495,6 @@ static void page_usage_cell(
  int cellno              /* Index of the cell on the page */
 ){
  int i;
-  int nDesc = 0;
  int n = 0;
  i64 nPayload;
  i64 rowid;
@@ -677,7 +676,7 @@ static void page_usage_report(const char *zDbName){
    if( rc==SQLITE_OK ){
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
        int pgno = sqlite3_column_int(pStmt, 2);
-        page_usage_btree(pgno, 0, 0, sqlite3_column_text(pStmt, 1));
+        page_usage_btree(pgno, 0, 0, (const char*)sqlite3_column_text(pStmt,1));
      }
    }else{
      printf("ERROR: cannot query database: %s\n", sqlite3_errmsg(db));
@@ -835,7 +834,6 @@ int main(int argc, char **argv){
        free(a);
        continue;
      }else if( zLeft && zLeft[0]=='t' ){
-        unsigned char *a;
        int detail = 0;
        int recursive = 0;
        int i;
@@ -861,4 +859,5 @@ int main(int argc, char **argv){
    }
  }
  close(db);
+  return 0;
 }
Author	SHA1	Message	Date
drh	ed71a839fd	Change the OP_InitCoroutine instruction to jump over the co-routine implementation. FossilOrigin-Name: a522f364a6b8ca6f69c353b30609a2166f6e94cf	2014-02-07 19:18:10 +00:00
drh	81cf13ec7b	Get rid of the OP_Undef and OP_IsUndef opcodes in favor of higher-level OP_InitCoroutine and OP_EndCoroutine. FossilOrigin-Name: 1ec0e9dd4b26d9f597adc8e062317d4866c5a6a6	2014-02-07 18:27:53 +00:00
drh	a5750cfe01	Add the OP_Undef and OP_IsUndef opcodes. With these, use the first register in the result register range as the flag to indicate EOF on an INSERT from a SELECT, rather than allocating a separate boolean register for that task. FossilOrigin-Name: 6fb7448550f28a3c93053e125faeaf11de1011d0	2014-02-07 13:20:31 +00:00
mistachkin	21a919f630	More comment updates. No changes to code. FossilOrigin-Name: be24fbc22106e508975e316abe0471edd3833291	2014-02-07 03:28:02 +00:00
drh	0fd613542c	Update comments in vdbe.c. No changes to code. FossilOrigin-Name: 1122b410de68a3c79b4c719a3a4cc4dc6a5bb39d	2014-02-07 02:29:45 +00:00
drh	b22f7c831f	Delete the OP_VerifySchema opcode. Enhance OP_Transaction to do the schema version checks that OP_VerifySchema used to do. FossilOrigin-Name: 2f3376ebf13df44e6acf27cb1f07172cd8b34033	2014-02-06 23:56:27 +00:00
drh	0211d8bca4	Change the spellfix1 virtual table to deterministically names its shadow tables. FossilOrigin-Name: 5219cdfc56ec3e1cd645ae6443ba72ce0df0339a	2014-02-06 13:18:51 +00:00
drh	4bbcf10617	Add additional error messages and a progress spinner to the ".clone" command. FossilOrigin-Name: dd0db3f0cef1be46cea16d4e61ea3348b3b3bd3e	2014-02-06 02:46:08 +00:00
mistachkin	e31ae90100	Rename the '.repair' shell command to '.clone'. FossilOrigin-Name: 4f9d95624ae4e123f83c835b5940f64d4a47be0d	2014-02-06 01:15:29 +00:00
drh	3350ce95f7	Add the ".repair" command to the command-line shell. FossilOrigin-Name: d1dfadea87ecf18eeb6d2f21769deaa97473ca0e	2014-02-06 00:49:12 +00:00
mistachkin	5dfd3d9080	In the Win32 VFS, the winSysInfo variable should be static. FossilOrigin-Name: 4a4dd371a72b7d475185923bebb4cd9bd83e1bd9	2014-02-05 11:05:47 +00:00
drh	e08ecad58a	Do not mark the ephemeral tables used to hold the RHS of IN clauses as unordered because the NGQP will use those ephemeral tables to help order the output. This is not an issue for standard SQLite since ephemeral tables there are always ordered, regardless of the hint. It only affects systems that substitute an alternative storage engine. FossilOrigin-Name: f2504089df0bf4011864e67825b37f6aa3d03458	2014-02-04 23:45:45 +00:00
drh	ee06c99b49	Remove the SF_Materialize flag from the SELECT object as it does not accomplish anything useful. FossilOrigin-Name: 65d5dcddbd34dfb2733a7a908c7c652ce2d610fe	2014-02-04 20:46:41 +00:00
drh	7df89c8c8a	Rearrange fields in the Parse object for a tighter packing, resulting in an 8% size reduction on x64. FossilOrigin-Name: 3e1a3f68d7457ff708222a3448404b593f018fc2	2014-02-04 15:55:25 +00:00
drh	fe21a796f7	Performance optimizations in sqlite3PcacheFetch(). FossilOrigin-Name: b60cc11ef775c23a2245d9e7a00dab34013f3ccb	2014-02-03 17:04:29 +00:00
drh	e39a732ce2	Provide hints to the btree layer Next and Previous primitives to let them know if they can be no-ops if the underlying index is unique. FossilOrigin-Name: 6c643e45c274e755dc5a1a65673df79261c774be	2014-02-03 14:04:11 +00:00
drh	6645370e5b	Version 3.8.3 FossilOrigin-Name: e816dd924619db5f766de6df74ea2194f3e3b538	2014-02-03 13:52:03 +00:00
drh	dd31490e02	Minor change to TEA extension docs in an attempt to make links work correctly. FossilOrigin-Name: af3c775e5d6a399bfc985a5dae27451908766546	2014-02-03 13:49:40 +00:00
drh	d49c545968	Update the "sqlite3.1" unix manpage document. FossilOrigin-Name: 21ce9e3a53aed62fbe075b0dbed9faa00218aadc	2014-01-31 11:50:20 +00:00
mistachkin	a3fdec7172	Minor change to TEA extension docs in an attempt to make links work correctly. FossilOrigin-Name: 492585c8208457120dde24f5fbf4db7e4e10ae73	2014-01-31 06:35:37 +00:00
drh	bb44b3de39	Update evidence marks on SELECT tests. Comment changes only. No changes to code or tests. FossilOrigin-Name: 1973d80e474cb95d053e04415b22154897d4d710	2014-01-30 17:47:02 +00:00
drh	9a2555f538	Fix requirements marks only. No changes to code or tests. FossilOrigin-Name: 4a34378b9b02e463081729186dcb9b0404dbcd06	2014-01-30 15:03:50 +00:00
drh	a88aca5442	Update a requirement mark and add some additional test cases to cover the requirement associated with ORDER BY and LIMIT on compound SELECT statements. FossilOrigin-Name: 8560091e85f2f99a24810648868bf2e081c32698	2014-01-30 14:10:00 +00:00
mistachkin	b8e59bcb86	Enhance the MSVC makefile for better debugging symbol support. FossilOrigin-Name: c9bef0f29a5a7f04914d80e58105104babd4168c	2014-01-30 12:45:32 +00:00
dan	81a034b62b	Do not run test script mmapfault.test as part of the "inmemory_journal" permutation test. FossilOrigin-Name: b222b61a98dc1f3c2c48ea06efe7d82d9fcf4d75	2014-01-30 12:16:23 +00:00
mistachkin	b04275121c	Enhance the MSVC makefile for better debugging symbol support. FossilOrigin-Name: c723ec2784d6b60c9781a435c84800b2bc7818d5	2014-01-30 11:12:52 +00:00
drh	ec2da85412	Make sure that sqlite3SelectDup() initializes the nSelectRow of the duplicate Select object. FossilOrigin-Name: 5bb29b82109224a2ad02920658fabd8fb0f27b3f	2014-01-29 01:46:12 +00:00
drh	db718d8a3b	Fix harmless compiler warnings in the showdb utility program. FossilOrigin-Name: 27c27daa3324b7c9323acfb972330367630bb64e	2014-01-28 20:36:22 +00:00
drh	4d06798e56	Fix a potential over-size and hence undefined shift operation. FossilOrigin-Name: 6379b0729521146bc4ec27a9924492c7dc1d8a31	2014-01-28 18:53:29 +00:00
dan	9c2552f2e8	Minor bugfix in main.c so that the library builds with SQLITE_OMIT_WSD defined. FossilOrigin-Name: 5e3b9ecc7b2b2e50952de819b99bafdb7b9ff59e	2014-01-28 17:49:13 +00:00
dan	705a48758a	Fix a couple of problems with new test scripts causing the permutations test to fail. FossilOrigin-Name: 48d736c0ee1ac0879bd12d2f1901f208e87e538a	2014-01-27 16:35:15 +00:00
drh	a820c05aa0	Update some requirements marks to conform with improvements in the documentation. FossilOrigin-Name: be1acb610f7e594b417dd8409b7a7aa8f3af5f77	2014-01-27 15:02:07 +00:00
dan	d0879bad42	Fix a problem in pagerfault.test causing an assert() to fail. FossilOrigin-Name: ba8d2d507f82e2baaceadcf7ac6d71bb91f7e06b	2014-01-27 14:19:22 +00:00
drh	729677720d	Fix (harmless) duplicate variable declaration. FossilOrigin-Name: 94ed9bc4207873e0f3f8114009002f56d5aff359	2014-01-27 13:58:58 +00:00
dan	abfe034692	Fix some problems in test scripts. No code changes. FossilOrigin-Name: 08acfc65877e207f1a62d31a14afb4add20c4c35	2014-01-27 08:48:10 +00:00
dan	b68b97789e	Fix a problem causing SQLITE_OMIT_COMPOUND_SELECT builds to fail. FossilOrigin-Name: b30db0ac3096b43d55a6da40cafc7de569082bf8	2014-01-25 12:16:53 +00:00
drh	693e671936	Fixes for various clang warnings. FossilOrigin-Name: 87bf60637e5863c54c5e2d05aaaca0835b7aace8	2014-01-24 22:58:00 +00:00
dan	53bed45ecb	Select collation sequences for ORDER BY expressions attached to recursive CTEs in the same way as they are selected for other compound SELECT statements. FossilOrigin-Name: 9554519c126c5e714421a82fd2e8aa9b19e11493	2014-01-24 20:37:18 +00:00
mistachkin	6ef5e12e1f	Fix harmless compiler warnings in the Tcl interface. FossilOrigin-Name: 35bc81f5ad4503c0db03127ba3c2ee4ce5227448	2014-01-24 17:03:55 +00:00
dan	05d3dc29c5	Add test cases for LIMIT and ORDER BY on recursive CTEs. FossilOrigin-Name: 67d6c42d44cb191368ce20f553b32fcb14bfc4d7	2014-01-24 16:57:42 +00:00
drh	dc3bb0deb2	Use an unsigned integer to accumulate the string hash. Avoids compiler warnings. FossilOrigin-Name: b1824344ea4918a13abbda4a3b7134d35fd867c4	2014-01-24 16:36:18 +00:00
drh	9e2c7ae1b0	Add a few more CTE test cases to closure.test. FossilOrigin-Name: 1b6405d9788c1bb89761b2bcdce560a5020ff503	2014-01-24 15:42:51 +00:00
drh	3c2aeae16e	Add test cases that compare the performance of the transitive_closure virtual table again common table expressions for walking a tree. FossilOrigin-Name: 9a23f020e8ed0e7a1ad227b4ab379fdf5e2de222	2014-01-24 14:37:44 +00:00
drh	b090352b5a	Add test cases showing the use of ORDER BY on a recursive query to control depth-first versus breath-first search of a tree. FossilOrigin-Name: 83b0b2916589db0184435dbd4c304387f393ed60	2014-01-24 11:16:01 +00:00
dan	afcf9bd806	Modifications to test files to omit any tests that intentionally access out-of-bounds locations in clang -fsanitize=address builds. FossilOrigin-Name: f4a701d55f5c4e1e62ed64b779ad4fff89dd31b7	2014-01-23 14:44:08 +00:00
dan	cfe24586a8	Avoid an extra seek when inserting records into the epheremal index used to ensure that rows returned by UNION recursive queries are unique. FossilOrigin-Name: 72c4b3f07a3faacb5b62d5bc374b4e125a0bd8b3	2014-01-22 19:23:30 +00:00
drh	edf83d1e3d	Fix harmless compiler warnings. FossilOrigin-Name: dea2ca6a159d5dcfd8deceedf1c2a73fb4ac1cfc	2014-01-22 18:31:27 +00:00
drh	953dfa4e60	Change the WITH RECURSIVE implementation to use a queue instead of a pair of tables. Add support for ORDER BY, LIMIT, and OFFSET on recursive queries. FossilOrigin-Name: b6cea42006910d590373e8f9e296d7672edb114b	2014-01-22 18:16:27 +00:00
dan	a8a0617e06	Update the spellfix virtual table to optimize queries of the form "SELECT ... FROM tbl WHERE rowid=?". FossilOrigin-Name: a0ba55ff0596c5f15e9cdb254c68ef50df2dfaad	2014-01-22 17:43:16 +00:00