Update this branch with the latest changes from sorter-opt.

FossilOrigin-Name: 08c0b19b89ea62d40c85bab64d9c80e02eaa8d5d
diff --git a/Makefile.in b/Makefile.in
index 4ac0693..295a6bc 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -536,6 +536,9 @@
 		-o $@ $(TOP)/src/shell.c libsqlite3.la \
 		$(LIBREADLINE) $(TLIBS) -rpath "$(libdir)"
 
+sqldiff$(EXE):	$(TOP)/tool/sqldiff.c sqlite3.c sqlite3.h
+	$(LTLINK) -o $@ $(TOP)/tool/sqldiff.c	sqlite3.c $(TLIBS)
+
 mptester$(EXE):	sqlite3.c $(TOP)/mptest/mptest.c
 	$(LTLINK) -o $@ -I. $(TOP)/mptest/mptest.c sqlite3.c \
 		$(TLIBS) -rpath "$(libdir)"
@@ -1059,7 +1062,7 @@
 	$(INSTALL) -m 0644 sqlite3.pc $(DESTDIR)$(pkgconfigdir)
 
 pkgIndex.tcl:
-	echo 'package ifneeded sqlite3 $(RELEASE) [list load $(TCLLIBDIR)/libtclsqlite3.so sqlite3]' > $@
+	echo 'package ifneeded sqlite3 $(RELEASE) [list load $(TCLLIBDIR)/libtclsqlite3$(SHLIB_SUFFIX) sqlite3]' > $@
 tcl_install:	lib_install libtclsqlite3.la pkgIndex.tcl
 	$(INSTALL) -d $(DESTDIR)$(TCLLIBDIR)
 	$(LTINSTALL) libtclsqlite3.la $(DESTDIR)$(TCLLIBDIR)
diff --git a/Makefile.msc b/Makefile.msc
index 837fc00..b49a3eb 100644
--- a/Makefile.msc
+++ b/Makefile.msc
@@ -331,7 +331,7 @@
 # These are additional compiler options used for the core library.
 #
 !IFNDEF CORE_COMPILE_OPTS
-!IF $(USE_STDCALL)!=0
+!IF $(DYNAMIC_SHELL)!=0
 CORE_COMPILE_OPTS = $(CORE_CCONV_OPTS) -DSQLITE_API=__declspec(dllexport)
 !ELSE
 CORE_COMPILE_OPTS = $(CORE_CCONV_OPTS)
@@ -342,7 +342,7 @@
 # when linking.
 #
 !IFNDEF CORE_LINK_DEP
-!IF $(USE_STDCALL)!=0
+!IF $(DYNAMIC_SHELL)!=0
 CORE_LINK_DEP =
 !ELSE
 CORE_LINK_DEP = sqlite3.def
@@ -352,7 +352,7 @@
 # These are additional linker options used for the core library.
 #
 !IFNDEF CORE_LINK_OPTS
-!IF $(USE_STDCALL)!=0
+!IF $(DYNAMIC_SHELL)!=0
 CORE_LINK_OPTS =
 !ELSE
 CORE_LINK_OPTS = /DEF:sqlite3.def
@@ -1154,10 +1154,27 @@
 	$(LTLINK) $(SHELL_COMPILE_OPTS) $(READLINE_FLAGS) $(TOP)\src\shell.c \
 		/link /pdb:sqlite3sh.pdb $(LTLINKOPTS) $(SHELL_LINK_OPTS) $(LTLIBPATHS) $(LIBRESOBJS) $(LIBREADLINE) $(LTLIBS) $(TLIBS)
 
+sqldiff.exe:	$(TOP)\tool\sqldiff.c sqlite3.c sqlite3.h
+	$(LTLINK) $(TOP)\tool\sqldiff.c sqlite3.c
+
 mptester.exe:	$(TOP)\mptest\mptest.c $(SHELL_CORE_DEP) $(LIBRESOBJS) sqlite3.h
 	$(LTLINK) $(SHELL_COMPILE_OPTS) $(TOP)\mptest\mptest.c \
 		/link $(LTLINKOPTS) $(LTLIBPATHS) $(SHELL_LINK_OPTS) $(LIBRESOBJS) $(LIBREADLINE) $(LTLIBS) $(TLIBS)
 
+MPTEST1 = mptester mptest.db $(TOP)/mptest/crash01.test --repeat 20
+MPTEST2 = mptester mptest.db $(TOP)/mptest/multiwrite01.test --repeat 20
+
+mptest:	mptester.exe
+	del /Q mptest.db 2>NUL
+	$(MPTEST1) --journalmode DELETE
+	$(MPTEST2) --journalmode WAL
+	$(MPTEST1) --journalmode WAL
+	$(MPTEST2) --journalmode PERSIST
+	$(MPTEST1) --journalmode PERSIST
+	$(MPTEST2) --journalmode TRUNCATE
+	$(MPTEST1) --journalmode TRUNCATE
+	$(MPTEST2) --journalmode DELETE
+
 # This target creates a directory named "tsrc" and fills it with
 # copies of all of the C source code and header files needed to
 # build on the target system.  Some of the C source code and header
diff --git a/configure b/configure
index 0c519e2..d259324 100755
--- a/configure
+++ b/configure
Binary files differ
diff --git a/configure.ac b/configure.ac
index 00ecf45..6a11888 100644
--- a/configure.ac
+++ b/configure.ac
@@ -430,6 +430,7 @@
     AC_SUBST(TCL_STUB_LIB_FILE)
     AC_SUBST(TCL_STUB_LIB_FLAG)
     AC_SUBST(TCL_STUB_LIB_SPEC)
+    AC_SUBST(TCL_SHLIB_SUFFIX)
   fi
 fi
 if test "${use_tcl}" = "no" ; then
diff --git a/ext/fts3/fts3.c b/ext/fts3/fts3.c
index c924632..42b9663 100644
--- a/ext/fts3/fts3.c
+++ b/ext/fts3/fts3.c
@@ -1019,7 +1019,8 @@
   const char *zTbl,               /* Name of content table */
   const char ***pazCol,           /* OUT: Malloc'd array of column names */
   int *pnCol,                     /* OUT: Size of array *pazCol */
-  int *pnStr                      /* OUT: Bytes of string content */
+  int *pnStr,                     /* OUT: Bytes of string content */
+  char **pzErr                    /* OUT: error message */
 ){
   int rc = SQLITE_OK;             /* Return code */
   char *zSql;                     /* "SELECT *" statement on zTbl */  
@@ -1030,6 +1031,9 @@
     rc = SQLITE_NOMEM;
   }else{
     rc = sqlite3_prepare(db, zSql, -1, &pStmt, 0);
+    if( rc!=SQLITE_OK ){
+      *pzErr = sqlite3_mprintf("%s", sqlite3_errmsg(db));
+    }
   }
   sqlite3_free(zSql);
 
@@ -1108,7 +1112,7 @@
   const char **aCol;              /* Array of column names */
   sqlite3_tokenizer *pTokenizer = 0;        /* Tokenizer for this table */
 
-  int nIndex;                     /* Size of aIndex[] array */
+  int nIndex = 0;                 /* Size of aIndex[] array */
   struct Fts3Index *aIndex = 0;   /* Array of indexes for this table */
 
   /* The results of parsing supported FTS4 key=value options: */
@@ -1281,7 +1285,7 @@
     if( nCol==0 ){
       sqlite3_free((void*)aCol); 
       aCol = 0;
-      rc = fts3ContentColumns(db, argv[1], zContent, &aCol, &nCol, &nString);
+      rc = fts3ContentColumns(db, argv[1], zContent,&aCol,&nCol,&nString,pzErr);
 
       /* If a languageid= option was specified, remove the language id
       ** column from the aCol[] array. */ 
@@ -2502,26 +2506,33 @@
 **
 ** The right-hand input doclist is overwritten by this function.
 */
-static void fts3DoclistPhraseMerge(
+static int fts3DoclistPhraseMerge(
   int bDescDoclist,               /* True if arguments are desc */
   int nDist,                      /* Distance from left to right (1=adjacent) */
   char *aLeft, int nLeft,         /* Left doclist */
-  char *aRight, int *pnRight      /* IN/OUT: Right/output doclist */
+  char **paRight, int *pnRight    /* IN/OUT: Right/output doclist */
 ){
   sqlite3_int64 i1 = 0;
   sqlite3_int64 i2 = 0;
   sqlite3_int64 iPrev = 0;
+  char *aRight = *paRight;
   char *pEnd1 = &aLeft[nLeft];
   char *pEnd2 = &aRight[*pnRight];
   char *p1 = aLeft;
   char *p2 = aRight;
   char *p;
   int bFirstOut = 0;
-  char *aOut = aRight;
+  char *aOut;
 
   assert( nDist>0 );
-
+  if( bDescDoclist ){
+    aOut = sqlite3_malloc(*pnRight + FTS3_VARINT_MAX);
+    if( aOut==0 ) return SQLITE_NOMEM;
+  }else{
+    aOut = aRight;
+  }
   p = aOut;
+
   fts3GetDeltaVarint3(&p1, pEnd1, 0, &i1);
   fts3GetDeltaVarint3(&p2, pEnd2, 0, &i2);
 
@@ -2550,6 +2561,12 @@
   }
 
   *pnRight = (int)(p - aOut);
+  if( bDescDoclist ){
+    sqlite3_free(aRight);
+    *paRight = aOut;
+  }
+
+  return SQLITE_OK;
 }
 
 /*
@@ -2674,8 +2691,22 @@
 ){
   if( pTS->aaOutput[0]==0 ){
     /* If this is the first term selected, copy the doclist to the output
-    ** buffer using memcpy(). */
-    pTS->aaOutput[0] = sqlite3_malloc(nDoclist);
+    ** buffer using memcpy(). 
+    **
+    ** Add FTS3_VARINT_MAX bytes of unused space to the end of the 
+    ** allocation. This is so as to ensure that the buffer is big enough
+    ** to hold the current doclist AND'd with any other doclist. If the
+    ** doclists are stored in order=ASC order, this padding would not be
+    ** required (since the size of [doclistA AND doclistB] is always less
+    ** than or equal to the size of [doclistA] in that case). But this is
+    ** not true for order=DESC. For example, a doclist containing (1, -1) 
+    ** may be smaller than (-1), as in the first example the -1 may be stored
+    ** as a single-byte delta, whereas in the second it must be stored as a
+    ** FTS3_VARINT_MAX byte varint.
+    **
+    ** Similar padding is added in the fts3DoclistOrMerge() function.
+    */
+    pTS->aaOutput[0] = sqlite3_malloc(nDoclist + FTS3_VARINT_MAX + 1);
     pTS->anOutput[0] = nDoclist;
     if( pTS->aaOutput[0] ){
       memcpy(pTS->aaOutput[0], aDoclist, nDoclist);
@@ -3931,14 +3962,17 @@
 ** This function assumes that pList points to a buffer allocated using
 ** sqlite3_malloc(). This function takes responsibility for eventually
 ** freeing the buffer.
+**
+** SQLITE_OK is returned if successful, or SQLITE_NOMEM if an error occurs.
 */
-static void fts3EvalPhraseMergeToken(
+static int fts3EvalPhraseMergeToken(
   Fts3Table *pTab,                /* FTS Table pointer */
   Fts3Phrase *p,                  /* Phrase to merge pList/nList into */
   int iToken,                     /* Token pList/nList corresponds to */
   char *pList,                    /* Pointer to doclist */
   int nList                       /* Number of bytes in pList */
 ){
+  int rc = SQLITE_OK;
   assert( iToken!=p->iDoclistToken );
 
   if( pList==0 ){
@@ -3977,13 +4011,16 @@
       nDiff = p->iDoclistToken - iToken;
     }
 
-    fts3DoclistPhraseMerge(pTab->bDescIdx, nDiff, pLeft, nLeft, pRight,&nRight);
+    rc = fts3DoclistPhraseMerge(
+        pTab->bDescIdx, nDiff, pLeft, nLeft, &pRight, &nRight
+    );
     sqlite3_free(pLeft);
     p->doclist.aAll = pRight;
     p->doclist.nAll = nRight;
   }
 
   if( iToken>p->iDoclistToken ) p->iDoclistToken = iToken;
+  return rc;
 }
 
 /*
@@ -4009,7 +4046,7 @@
       char *pThis = 0;
       rc = fts3TermSelect(pTab, pToken, p->iColumn, &nThis, &pThis);
       if( rc==SQLITE_OK ){
-        fts3EvalPhraseMergeToken(pTab, p, iToken, pThis, nThis);
+        rc = fts3EvalPhraseMergeToken(pTab, p, iToken, pThis, nThis);
       }
     }
     assert( pToken->pSegcsr==0 );
@@ -4812,8 +4849,12 @@
         rc = fts3TermSelect(pTab, pToken, pTC->iCol, &nList, &pList);
         assert( rc==SQLITE_OK || pList==0 );
         if( rc==SQLITE_OK ){
+          rc = fts3EvalPhraseMergeToken(
+              pTab, pTC->pPhrase, pTC->iToken,pList,nList
+          );
+        }
+        if( rc==SQLITE_OK ){
           int nCount;
-          fts3EvalPhraseMergeToken(pTab, pTC->pPhrase, pTC->iToken,pList,nList);
           nCount = fts3DoclistCountDocids(
               pTC->pPhrase->doclist.aAll, pTC->pPhrase->doclist.nAll
           );
diff --git a/main.mk b/main.mk
index 7d21dbb..c5328dc 100644
--- a/main.mk
+++ b/main.mk
@@ -404,10 +404,27 @@
 		$(TOP)/src/shell.c                                  \
 		libsqlite3.a $(LIBREADLINE) $(TLIBS) $(THREADLIB)
 
+sqldiff$(EXE):	$(TOP)/tool/sqldiff.c sqlite3.c sqlite3.h
+	$(TCCX) -o sqldiff$(EXE) -DSQLITE_THREADSAFE=0 \
+		$(TOP)/tool/sqldiff.c	sqlite3.c $(TLIBS) $(THREADLIB)
+
 mptester$(EXE):	sqlite3.c $(TOP)/mptest/mptest.c
 	$(TCCX) -o $@ -I. $(TOP)/mptest/mptest.c sqlite3.c \
 		$(TLIBS) $(THREADLIB)
 
+MPTEST1=./mptester$(EXE) mptest.db $(TOP)/mptest/crash01.test --repeat 20
+MPTEST2=./mptester$(EXE) mptest.db $(TOP)/mptest/multiwrite01.test --repeat 20
+mptest:	mptester$(EXE)
+	rm -f mptest.db
+	$(MPTEST1) --journalmode DELETE
+	$(MPTEST2) --journalmode WAL
+	$(MPTEST1) --journalmode WAL
+	$(MPTEST2) --journalmode PERSIST
+	$(MPTEST1) --journalmode PERSIST
+	$(MPTEST2) --journalmode TRUNCATE
+	$(MPTEST1) --journalmode TRUNCATE
+	$(MPTEST2) --journalmode DELETE
+
 sqlite3.o:	sqlite3.c
 	$(TCCX) -I. -c sqlite3.c
 
diff --git a/manifest b/manifest
index 896a9a9..4a301e6 100644
--- a/manifest
+++ b/manifest
@@ -1,9 +1,9 @@
-C Merge\ssorter\soptimizations\swith\sthis\sbranch.
-D 2015-03-30T15:45:45.183
+C Update\sthis\sbranch\swith\sthe\slatest\schanges\sfrom\ssorter-opt.
+D 2015-04-10T08:28:24.183
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
-F Makefile.in 88a3e6261286db378fdffa1124cad11b3c05f5bb
+F Makefile.in 5f78b1ab81b64e7c57a75d170832443e66c0880a
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
-F Makefile.msc 3481e2dd260968742c715542db178c2bdd5db99f
+F Makefile.msc fa6a6de11af800d89f86e8a4266fd40a46008347
 F Makefile.vxworks e1b65dea203f054e71653415bd8f96dcaed47858
 F README.md d58e3bebc0a4145e0f2a87994015fdb575a8e866
 F VERSION 319eb1ced4b4d17a67730f2b7b85f15c1346cb60
@@ -38,8 +38,8 @@
 F config.guess 226d9a188c6196f3033ffc651cbc9dcee1a42977
 F config.h.in 42b71ad3fe21c9e88fa59e8458ca1a6bc72eb0c0
 F config.sub 9ebe4c3b3dab6431ece34f16828b594fb420da55
-F configure 613b220c2f2c7adcd50eb5ee4144ab581a150b47 x
-F configure.ac 6a8d145aea6d81f0b90013340780e43ed74fd5f4
+F configure 8b18c2378805a1d8aaca85d293671f450dd3c723 x
+F configure.ac 0b775d383c536bbaafc1e46dd3cbb81a7ea11aeb
 F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad
 F doc/lemon.html 334dbf6621b8fb8790297ec1abf3cfa4621709d1
 F doc/pager-invariants.txt 27fed9a70ddad2088750c4a2b493b63853da2710
@@ -78,7 +78,7 @@
 F ext/fts3/README.syntax a19711dc5458c20734b8e485e75fb1981ec2427a
 F ext/fts3/README.tokenizers e0a8b81383ea60d0334d274fadf305ea14a8c314
 F ext/fts3/README.txt 8c18f41574404623b76917b9da66fcb0ab38328d
-F ext/fts3/fts3.c 2a1cf23133d0c75ce296d17440c44115f8413ec7
+F ext/fts3/fts3.c 57d863c3bd360e575ecc293570af7c9b0bdd2209
 F ext/fts3/fts3.h 3a10a0af180d502cecc50df77b1b22df142817fe
 F ext/fts3/fts3Int.h 394858c12a17740f7a1f6bd372c4606d4425a8d1
 F ext/fts3/fts3_aux.c 5c211e17a64885faeb16b9ba7772f9d5445c2365
@@ -152,7 +152,7 @@
 F install-sh 9d4de14ab9fb0facae2f48780b874848cbf2f895 x
 F ltmain.sh 3ff0879076df340d2e23ae905484d8c15d5fdea8
 F magic.txt 8273bf49ba3b0c8559cb2774495390c31fd61c60
-F main.mk 04c49c495795b18a7b70053eef285be1e4d43fa4
+F main.mk ddffac494a82d42772df9fe30d3a78acf4f7cb41
 F mkopcodec.awk c2ff431854d702cdd2d779c9c0d1f58fa16fa4ea
 F mkopcodeh.awk c6b3fa301db6ef7ac916b14c60868aeaec1337b5
 F mkso.sh fd21c06b063bb16a5d25deea1752c2da6ac3ed83
@@ -160,7 +160,7 @@
 F mptest/config02.test 4415dfe36c48785f751e16e32c20b077c28ae504
 F mptest/crash01.test 61e61469e257df0850df4293d7d4d6c2af301421
 F mptest/crash02.subtest f4ef05adcd15d60e5d2bd654204f2c008b519df8
-F mptest/mptest.c 1e464f41f1bbc6578d6925043da56170f83aea96
+F mptest/mptest.c dae6de83eddac3ef97fc4111632f6066760f939a
 F mptest/multiwrite01.test dab5c5f8f9534971efce679152c5146da265222d
 F spec.template 86a4a43b99ebb3e75e6b9a735d5fd293a24e90ca
 F sqlite.pc.in 42b7bf0d02e08b9e77734a47798d1a55a9e0716b
@@ -173,12 +173,12 @@
 F src/backup.c ff743689c4d6c5cb55ad42ed9d174b2b3e71f1e3
 F src/bitvec.c 19a4ba637bd85f8f63fc8c9bae5ade9fb05ec1cb
 F src/btmutex.c 45a968cc85afed9b5e6cf55bf1f42f8d18107f79
-F src/btree.c 4f305e554d7d207375c3e29ab0335bd5a473a125
+F src/btree.c 2caf598165f3608fde8abac2b243826616ce54b7
 F src/btree.h 969adc948e89e449220ff0ff724c94bb2a52e9f1
-F src/btreeInt.h 2bfefc01875d8da066504c233ec259fcb3b2ef72
-F src/build.c 0419bba592c22f6d00e6d57a2ca7136720d02c1a
+F src/btreeInt.h 973a22a6fd61350b454ad614832b1f0a5e25a1e4
+F src/build.c fa4795bc795077388aa4e746e1b25ef97bc10489
 F src/callback.c 7b44ce59674338ad48b0e84e7b72f935ea4f68b0
-F src/complete.c 198a0066ba60ab06fc00fba1998d870a4d575463
+F src/complete.c a5cf5b4b56390cfb7b8636e8f7ddef90258dd575
 F src/ctime.c 98f89724adc891a1a4c655bee04e33e716e05887
 F src/date.c e4d50b3283696836ec1036b695ead9a19e37a5ac
 F src/delete.c 37964e6c1d73ff49cbea9ff690c9605fb15f600e
@@ -190,13 +190,13 @@
 F src/hash.c 4263fbc955f26c2e8cdc0cf214bc42435aa4e4f5
 F src/hash.h c8f3c31722cf3277d03713909761e152a5b81094
 F src/hwtime.h d32741c8f4df852c7d959236615444e2b1063b08
-F src/insert.c 9f92c04e9bc6056ffd6129767749f2f16d5cd309
+F src/insert.c 5be66348c733c6f6cf9281aa99a6d49de3fc1897
 F src/journal.c b4124532212b6952f42eb2c12fa3c25701d8ba8d
 F src/legacy.c ba1863ea58c4c840335a84ec276fc2b25e22bc4e
 F src/lempar.c 7274c97d24bb46631e504332ccd3bd1b37841770
 F src/loadext.c 86bd4e2fccd520b748cba52492ab60c4a770f660
-F src/main.c 569d45ba9eb4fbdd631d53f440bcdb4a35ab1505
-F src/malloc.c e818a0db9ac0898f9dc74002f3a5baca32232d05
+F src/main.c 40e333960d53f7d50ee8ce09d40431c87ea653f2
+F src/malloc.c 6a370b83d54e4bbf6f94021221c2a311cff26a18
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c abe6ee469b6c5a35c7f22bfeb9c9bac664a1c987
 F src/mem2.c f1940d9e91948dd6a908fbb9ce3835c36b5d83c3
@@ -214,8 +214,8 @@
 F src/os.h 3e57a24e2794a94d3cf2342c6d9a884888cd96bf
 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
 F src/os_setup.h c9d4553b5aaa6f73391448b265b89bed0b890faa
-F src/os_unix.c a4dadbc2da41599e99093e91e276c38c17a73b89
-F src/os_win.c 8223e7db5b7c4a81d8b161098ac3959400434cdb
+F src/os_unix.c 25b80a3d167da44226a2084dc9e89a6cb1f02e2e
+F src/os_win.c 03d27be3a20048ef52a648d5f0a15f5edda9f2a3
 F src/os_win.h eb7a47aa17b26b77eb97e4823f20a00b8bda12ca
 F src/pager.c 4120a49ecd37697e28f5ed807f470b9c0b88410c
 F src/pager.h c3476e7c89cdf1c6914e50a11f3714e30b4e0a77
@@ -226,16 +226,16 @@
 F src/pragma.c ac4f3f856b4234e85f55b0f069698a4766011100
 F src/pragma.h 09c89bca58e9a44de2116cc8272b8d454657129f
 F src/prepare.c 173a5a499138451b2561614ecb87d78f9f4644b9
-F src/printf.c 8da9a2687a396daa19860f4dc90975d319304744
+F src/printf.c 8ae1fa9d30c1200a9268a390ba9e9cea9197b27a
 F src/random.c ba2679f80ec82c4190062d756f22d0c358180696
-F src/resolve.c f4d79e31ffa5820c2e3d1740baa5e9b190425f2b
+F src/resolve.c 41aa91af56d960e9414ce1d7c17cfb68e0d1c6cb
 F src/rowset.c eccf6af6d620aaa4579bd3b72c1b6395d9e9fa1e
-F src/select.c 72ffb62e2879956302140e9f6e6ae88aee36b0e5
-F src/shell.c 3ae1e53878d2804fe77b8c8f1f6ca287a0e5d80e
+F src/select.c c28c52e353287434fac8473e56ee4be848d12c9d
+F src/shell.c 84a1593bd86aaa14f4da8a8f9b16fbc239d262aa
 F src/sqlite.h.in 278602140d49575e8708e643161f4263e428a02a
 F src/sqlite3.rc 992c9f5fb8285ae285d6be28240a7e8d3a7f2bad
 F src/sqlite3ext.h 17d487c3c91b0b8c584a32fbeb393f6f795eea7d
-F src/sqliteInt.h c622684344dd0f008ba5198342426aacec36d9f2
+F src/sqliteInt.h 6ee18690cb02494d7aa381584102701ec783fc5d
 F src/sqliteLimit.h 216557999cb45f2e3578ed53ebefe228d779cb46
 F src/status.c f266ad8a2892d659b74f0f50cb6a88b6e7c12179
 F src/table.c e7a09215315a978057fb42c640f890160dbcc45e
@@ -288,21 +288,21 @@
 F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
 F src/threads.c 6bbcc9fe50c917864d48287b4792d46d6e873481
 F src/tokenize.c a8d270b06e5f709930f7b67cf70a847969cb5bf3
-F src/trigger.c 25571661fdeae8c7f975ff40ffec205520a3f92f
+F src/trigger.c 69a91bed7c94e46223e37ffccfeeb35e34b999ac
 F src/update.c 250cefb96cfc7ca8f86f92ecf6b6b6c7e289daf7
 F src/utf.c fc6b889ba0779b7722634cdeaa25f1930d93820c
 F src/util.c 98a7627ca48ad3265b6940915a1d08355eb3fc7e
-F src/vacuum.c 9460b9de7b2d4e34b0d374894aa6c8a0632be8ec
-F src/vdbe.c 5cb31321523c4723a70f965c996feedf89e24c1f
+F src/vacuum.c 2ddd5cad2a7b9cef7f9e431b8c7771634c6b1701
+F src/vdbe.c 3c28266d50807ab9194874392dccb8f78d2078b4
 F src/vdbe.h 7e538ecf47dccb307ea2d087c3ddc2dd8d70e79d
 F src/vdbeInt.h 9cbaa84f53ddd2d09a0cf61a94337a3a035d08a0
 F src/vdbeapi.c 583d56b129dd27f12bed518270de9ebe521e6a75
 F src/vdbeaux.c a20504ae52392459fa08402fda3f195f19d7c79d
 F src/vdbeblob.c 4f2e8e075d238392df98c5e03a64342465b03f90
 F src/vdbemem.c c0dc81285b7571b0a31c40f17846fe2397ec1cd9
-F src/vdbesort.c 7b3684665ea51d642b0e664fa4d0b0d08d61d80c
+F src/vdbesort.c 74a41fcd3adc22bc47ede68443d0b3e26ae13bb8
 F src/vdbetrace.c 7e4222955e07dd707a2f360c0eb73452be1cb010
-F src/vtab.c 62d49237bd8f3be4863815a39387b0f9897fa5e1
+F src/vtab.c ff722a886ed61e2e2889ee221b0a4f6dcaabb8e1
 F src/vxworks.h c18586c8edc1bddbc15c004fa16aeb1e1342b4fb
 F src/wal.c 878c8e1a51cb2ec45c395d26b7d5cd9e1a098e4a
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
@@ -340,7 +340,7 @@
 F test/async4.test 1787e3952128aa10238bf39945126de7ca23685a
 F test/async5.test 383ab533fdb9f7ad228cc99ee66e1acb34cc0dc0
 F test/atof1.test 08a61df9365c341f334a65f4348897312d8f3db7
-F test/attach.test 0d112b7713611fdf0340260192749737135fda5f
+F test/attach.test 437107943f14d131cf5efc2ae5305a94d7cb1d58
 F test/attach2.test 0ec5defa340363de6cd50fd595046465e9aaba2d
 F test/attach3.test 359eb65d00102cdfcef6fa4e81dc1648f8f80b27
 F test/attach4.test 53bf502f17647c6d6c5add46dda6bac8b6f4665c
@@ -433,6 +433,7 @@
 F test/corruptG.test 1ab3bf97ee7bdba70e0ff3ba2320657df55d1804
 F test/corruptH.test 5dd4fa98c6c1ed33b178f9e8a48c4fdd3cfc9067
 F test/corruptI.test 221ad8b7f0a9ac6b80fc577e73b5ad8cdea31243
+F test/corruptJ.test 9e29e7a81ee3b6ac50f77ea7a9e2f3fa03f32d91
 F test/cost.test 19d314526616ce4473eb4e4e450fcb94499ce318
 F test/count.test 42a251178e32f617eda33f76236a7f79825a50b5
 F test/coveridxscan.test cdb47d01acc4a634a34fd25abe85189e0d0f1e62
@@ -484,7 +485,7 @@
 F test/e_uri.test 5ae33760fb2039c61aa2d90886f1664664173585
 F test/e_vacuum.test a83cbb0b1f52cfda735909609f9f6422d1655bc3
 F test/e_wal.test ae9a593207a77d711443ee69ffe081fda9243625
-F test/e_walauto.test ca70cf75c07a6cb1874ced101dd426da76625649
+F test/e_walauto.test 6544af03423abc61b53cfb976839385ddc2a0a70
 F test/e_walckpt.test 65e29b6631e51f210f83e4ff11571e647ba93608
 F test/e_walhook.test da3ea8b3483d1af72190337bda50155a91a4b664
 F test/enc.test e54531cd6bf941ee6760be041dff19a104c7acea
@@ -587,13 +588,13 @@
 F test/fts3expr3.test 9e91b8edbcb197bf2e92161aa7696446d96dce5f
 F test/fts3expr4.test e1be1248566f43c252d4404d52914f1fc4bfa065
 F test/fts3fault.test cb72dccb0a3b9f730f16c5240f3fcb9303eb1660
-F test/fts3fault2.test 3198eef2804deea7cac8403e771d9cbcb752d887
+F test/fts3fault2.test f953bb3cf903988172270a9a0aafd5a890b0f98f
 F test/fts3first.test dbdedd20914c8d539aa3206c9b34a23775644641
 F test/fts3join.test 53e66a0c21eb568580674a43b21c059acb26f499
 F test/fts3malloc.test b0e4c133b8d61d4f6d112d8110f8320e9e453ef6
 F test/fts3matchinfo.test 58544fa4d254000fa4e7f494b0a832f7ba61d45e
 F test/fts3near.test 7e3354d46f155a822b59c0e957fd2a70c1d7e905
-F test/fts3prefix.test 9f68e3598a139c23ec47d09299420e0fc4c72a83
+F test/fts3prefix.test fa794eaab0bdae466494947b0b153d7844478ab2
 F test/fts3prefix2.test e1f0a822ca661dced7f12ce392e14eaf65609dce
 F test/fts3query.test c838b18f2b859e15fd31c64be3d79ef1556803ca
 F test/fts3rnd.test 1320d8826a845e38a96e769562bf83d7a92a15d0
@@ -605,7 +606,7 @@
 F test/fts3varint.test 752c08ed5d32c5d7dc211b056f4ed68a76b7e36e
 F test/fts4aa.test 10aac8e9d62c7357590acfabe3fad01e9a9ce1cb
 F test/fts4check.test 74d77f6cdb768ac49df5afda575cef14ae3d239a
-F test/fts4content.test 2e7252557d6d24afa101d9ba1de710d6140e6d06
+F test/fts4content.test abb0c77bc3da3df64fec72e00844d2257a90025d
 F test/fts4docid.test e33c383cfbdff0284685604d256f347a18fdbf01
 F test/fts4growth.test df10fde9f47cf5c71861e63fd8efcd573c4f7e53
 F test/fts4growth2.test 2f063be1902a73cd087355837c52fed42ac11a5d
@@ -797,7 +798,7 @@
 F test/pragma.test ad99d05e411c7687302124be56f3b362204be041
 F test/pragma2.test f624a496a95ee878e81e59961eade66d5c00c028
 F test/pragma3.test 6f849ccffeee7e496d2f2b5e74152306c0b8757c
-F test/printf.test ec9870c4dce8686a37818e0bf1aba6e6a1863552
+F test/printf.test b3ff34e73d59124140eaf89f7672e21bc2ca5fcc
 F test/printf2.test b4acd4bf8734243257f01ddefa17c4fb090acc8a
 F test/progress.test a282973d1d17f08071bc58a77d6b80f2a81c354d
 F test/ptrchng.test ef1aa72d6cf35a2bbd0869a649b744e9d84977fc
@@ -845,7 +846,7 @@
 F test/select7.test 7fd2ef598cfabb6b9ff6ac13973b91d0527df49d
 F test/select8.test 391de11bdd52339c30580dabbbbe97e3e9a3c79d
 F test/select9.test aebc2bb0c3bc44606125033cbcaac2c8d1f33a95
-F test/selectA.test 64b88a80271c1710966e50e633380696b60a12a4
+F test/selectA.test e452bdb975f488ea46d091382a9185b5853ed2c7
 F test/selectB.test 954e4e49cf1f896d61794e440669e03a27ceea25
 F test/selectC.test 871fb55d884d3de5943c4057ebd22c2459e71977
 F test/selectD.test b0f02a04ef7737decb24e08be2c39b9664b43394
@@ -1144,7 +1145,7 @@
 F test/wal_common.tcl a98f17fba96206122eff624db0ab13ec377be4fe
 F test/walbak.test b9f68e39646375c2b877be906babcc15d38b4877
 F test/walbig.test f437473a16cfb314867c6b5d1dbcd519e73e3434
-F test/walblock.test ffc761cd467a93ccd8cd998a23be2f21b95a83b1
+F test/walblock.test be48f3a75eff0b4456209f26b3ce186c2015497d
 F test/walcksum.test 9afeb96240296c08c72fc524d199c912cfe34daa
 F test/walcrash.test 451d79e528add5c42764cea74aa2750754171b25
 F test/walcrash2.test a0edab4e5390f03b99a790de89aad15d6ec70b36
@@ -1182,7 +1183,7 @@
 F test/wherelimit.test 5e9fd41e79bb2b2d588ed999d641d9c965619b31
 F test/wild001.test bca33f499866f04c24510d74baf1e578d4e44b1c
 F test/win32heap.test ea19770974795cff26e11575e12d422dbd16893c
-F test/win32lock.test 71642fa56e9b06e5cfffe6bad67cb8c1eb2c555a
+F test/win32lock.test fbf107c91d8f5512be5a5b87c4c42ab9fdd54972
 F test/win32longpath.test 169c75a3b2e43481f4a62122510210c67b08f26d
 F test/with1.test 9df5cd8a62148b3d9ef8597aea563e3863018bcd
 F test/with2.test ee227a663586aa09771cafd4fa269c5217eaf775
@@ -1206,7 +1207,7 @@
 F tool/genfkey.README cf68fddd4643bbe3ff8e31b8b6d8b0a1b85e20f4
 F tool/genfkey.test 4196a8928b78f51d54ef58e99e99401ab2f0a7e5
 F tool/getlock.c f4c39b651370156cae979501a7b156bdba50e7ce
-F tool/lemon.c 1864c4fe4a72b1bb28f1792b60504804fe82c5d2
+F tool/lemon.c ae5f61e3b164d35955777b20d6febcbaf0950702
 F tool/lempar.c 01ca97f87610d1dac6d8cd96ab109ab1130e76dc
 F tool/logest.c eef612f8adf4d0993dafed0416064cf50d5d33c6
 F tool/mkautoconfamal.sh d1a2da0e15b2ed33d60af35c7e9d483f13a8eb9f
@@ -1227,6 +1228,7 @@
 F tool/rollback-test.c 9fc98427d1e23e84429d7e6d07d9094fbdec65a5
 F tool/showdb.c 63cdef19e7fbca0c164b096ef8aef3bb9e9dd222
 F tool/showjournal.c 053eb1cc774710c6890b7dd6293300cc297b16a5
+F tool/showlocks.c 9920bcc64f58378ff1118caead34147201f48c68
 F tool/showstat4.c 9515faa8ec176599d4a8288293ba8ec61f7b728a
 F tool/showwal.c 85cb36d4fe3e93e2fbd63e786e0d1ce42d0c4fad
 F tool/soak1.tcl 8d407956e1a45b485a8e072470a3e629a27037fe
@@ -1238,6 +1240,7 @@
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/split-sqlite3c.tcl d9be87f1c340285a3e081eb19b4a247981ed290c
+F tool/sqldiff.c 050763654cb28d23c4d9516deb348c8632e432cd
 F tool/stack_usage.tcl f8e71b92cdb099a147dad572375595eae55eca43
 F tool/symbols-mingw.sh 4dbcea7e74768305384c9fd2ed2b41bbf9f0414d
 F tool/symbols.sh fec58532668296d7c7dc48be9c87f75ccdb5814f
@@ -1248,7 +1251,7 @@
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P aeb8e9a9f2092fda0c3e051f135e1d65cf77ff13 601e7b6b8e6bfabda03b70f75094c9014e3a3c49
-R ecee2ba850684cc6832777f6c1e18b7d
+P 9bf1cfb4d99328bb95567330fdae76518f6386e2 60be9c1c1ad0d8250a99cadda820dff40a31c94e
+R 172efa9ba854731d65055b3485ef57e0
 U dan
-Z 755e374c8f5315221aeb3673026dbb0a
+Z a9138cfc25929a66b1eec293ef992a21
diff --git a/manifest.uuid b/manifest.uuid
index e0f7a91..b839b48 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-9bf1cfb4d99328bb95567330fdae76518f6386e2
\ No newline at end of file
+08c0b19b89ea62d40c85bab64d9c80e02eaa8d5d
\ No newline at end of file
diff --git a/mptest/mptest.c b/mptest/mptest.c
index 40c14bc..52ff6a4 100644
--- a/mptest/mptest.c
+++ b/mptest/mptest.c
@@ -1312,6 +1312,9 @@
                      GETPID(), iClient);
   }else{
     if( g.iTrace>0 ){
+      printf("BEGIN: %s", argv[0]);
+      for(i=1; i<argc; i++) printf(" %s", argv[i]);
+      printf("\n");
       printf("With SQLite " SQLITE_VERSION " " SQLITE_SOURCE_ID "\n" );
       for(i=0; (zCOption = sqlite3_compileoption_get(i))!=0; i++){
         printf("-DSQLITE_%s\n", zCOption);
@@ -1324,6 +1327,17 @@
   }
   rc = sqlite3_open_v2(g.zDbFile, &g.db, openFlags, g.zVfs);
   if( rc ) fatalError("cannot open [%s]", g.zDbFile);
+  if( zJMode ){
+#if defined(_WIN32)
+    if( sqlite3_stricmp(zJMode,"persist")==0
+     || sqlite3_stricmp(zJMode,"truncate")==0
+    ){
+      printf("Changing journal mode to DELETE from %s", zJMode);
+      zJMode = "DELETE";
+    }
+#endif
+    runSql("PRAGMA journal_mode=%Q;", zJMode);
+  }
   sqlite3_enable_load_extension(g.db, 1);
   sqlite3_busy_handler(g.db, busyHandler, 0);
   sqlite3_create_function(g.db, "vfsname", 0, SQLITE_UTF8, 0,
@@ -1355,7 +1369,6 @@
       fatalError("missing script filename");
     }
     if( n>1 ) unrecognizedArguments(argv[0], n, argv+2);
-    if( zJMode ) runSql("PRAGMA journal_mode=%Q;", zJMode);
     runSql(
       "DROP TABLE IF EXISTS task;\n"
       "DROP TABLE IF EXISTS counters;\n"
@@ -1409,6 +1422,9 @@
   maybeClose(g.pErrLog);
   if( iClient==0 ){
     printf("Summary: %d errors out of %d tests\n", g.nError, g.nTest);
+    printf("END: %s", argv[0]);
+    for(i=1; i<argc; i++) printf(" %s", argv[i]);
+    printf("\n");
   }
   return g.nError>0;
 }
diff --git a/src/btree.c b/src/btree.c
index 52f2942..789796d 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -1959,16 +1959,18 @@
   */
   if( isTempDb==0 && (isMemdb==0 || (vfsFlags&SQLITE_OPEN_URI)!=0) ){
     if( vfsFlags & SQLITE_OPEN_SHAREDCACHE ){
+      int nFilename = sqlite3Strlen30(zFilename)+1;
       int nFullPathname = pVfs->mxPathname+1;
-      char *zFullPathname = sqlite3Malloc(nFullPathname);
+      char *zFullPathname = sqlite3Malloc(MAX(nFullPathname,nFilename));
       MUTEX_LOGIC( sqlite3_mutex *mutexShared; )
+
       p->sharable = 1;
       if( !zFullPathname ){
         sqlite3_free(p);
         return SQLITE_NOMEM;
       }
       if( isMemdb ){
-        memcpy(zFullPathname, zFilename, sqlite3Strlen30(zFilename)+1);
+        memcpy(zFullPathname, zFilename, nFilename);
       }else{
         rc = sqlite3OsFullPathname(pVfs, zFilename,
                                    nFullPathname, zFullPathname);
@@ -7983,9 +7985,13 @@
   if( pgno>btreePagecount(pBt) ){
     return SQLITE_CORRUPT_BKPT;
   }
-
   rc = getAndInitPage(pBt, pgno, &pPage, 0);
   if( rc ) return rc;
+  if( pPage->bBusy ){
+    rc = SQLITE_CORRUPT_BKPT;
+    goto cleardatabasepage_out;
+  }
+  pPage->bBusy = 1;
   hdr = pPage->hdrOffset;
   for(i=0; i<pPage->nCell; i++){
     pCell = findCell(pPage, i);
@@ -8010,6 +8016,7 @@
   }
 
 cleardatabasepage_out:
+  pPage->bBusy = 0;
   releasePage(pPage);
   return rc;
 }
diff --git a/src/btreeInt.h b/src/btreeInt.h
index 87d0ef1..33ef641 100644
--- a/src/btreeInt.h
+++ b/src/btreeInt.h
@@ -280,6 +280,7 @@
   u8 hdrOffset;        /* 100 for page 1.  0 otherwise */
   u8 childPtrSize;     /* 0 if leaf==1.  4 if leaf==0 */
   u8 max1bytePayload;  /* min(maxLocal,127) */
+  u8 bBusy;            /* Prevent endless loops on corrupt database files */
   u16 maxLocal;        /* Copy of BtShared.maxLocal or BtShared.maxLeaf */
   u16 minLocal;        /* Copy of BtShared.minLocal or BtShared.minLeaf */
   u16 cellOffset;      /* Index in aData of first cell pointer */
diff --git a/src/build.c b/src/build.c
index fcf96bd..9d84655 100644
--- a/src/build.c
+++ b/src/build.c
@@ -2763,7 +2763,8 @@
     addr2 = sqlite3VdbeCurrentAddr(v);
   }
   sqlite3VdbeAddOp3(v, OP_SorterData, iSorter, regRecord, iIdx);
-  sqlite3VdbeAddOp3(v, OP_IdxInsert, iIdx, regRecord, 1);
+  sqlite3VdbeAddOp3(v, OP_Last, iIdx, 0, -1);
+  sqlite3VdbeAddOp3(v, OP_IdxInsert, iIdx, regRecord, 0);
   sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT);
   sqlite3ReleaseTempReg(pParse, regRecord);
   sqlite3VdbeAddOp2(v, OP_SorterNext, iSorter, addr2); VdbeCoverage(v);
@@ -3776,7 +3777,6 @@
 void sqlite3SrcListShiftJoinType(SrcList *p){
   if( p ){
     int i;
-    assert( p->a || p->nSrc==0 );
     for(i=p->nSrc-1; i>0; i--){
       p->a[i].jointype = p->a[i-1].jointype;
     }
diff --git a/src/complete.c b/src/complete.c
index f7a35cc..a12184e 100644
--- a/src/complete.c
+++ b/src/complete.c
@@ -269,7 +269,7 @@
 int sqlite3_complete16(const void *zSql){
   sqlite3_value *pVal;
   char const *zSql8;
-  int rc = SQLITE_NOMEM;
+  int rc;
 
 #ifndef SQLITE_OMIT_AUTOINIT
   rc = sqlite3_initialize();
diff --git a/src/insert.c b/src/insert.c
index 3b86802..0da5fee 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -1852,6 +1852,7 @@
   int onError,          /* How to handle constraint errors */
   int iDbDest           /* The database of pDest */
 ){
+  sqlite3 *db = pParse->db;
   ExprList *pEList;                /* The result set of the SELECT */
   Table *pSrc;                     /* The table in the FROM clause of SELECT */
   Index *pSrcIdx, *pDestIdx;       /* Source and destination indices */
@@ -1999,11 +2000,11 @@
   ** the extra complication to make this rule less restrictive is probably
   ** not worth the effort.  Ticket [6284df89debdfa61db8073e062908af0c9b6118e]
   */
-  if( (pParse->db->flags & SQLITE_ForeignKeys)!=0 && pDest->pFKey!=0 ){
+  if( (db->flags & SQLITE_ForeignKeys)!=0 && pDest->pFKey!=0 ){
     return 0;
   }
 #endif
-  if( (pParse->db->flags & SQLITE_CountRows)!=0 ){
+  if( (db->flags & SQLITE_CountRows)!=0 ){
     return 0;  /* xfer opt does not play well with PRAGMA count_changes */
   }
 
@@ -2014,7 +2015,7 @@
 #ifdef SQLITE_TEST
   sqlite3_xferopt_count++;
 #endif
-  iDbSrc = sqlite3SchemaToIndex(pParse->db, pSrc->pSchema);
+  iDbSrc = sqlite3SchemaToIndex(db, pSrc->pSchema);
   v = sqlite3GetVdbe(pParse);
   sqlite3CodeVerifySchema(pParse, iDbSrc);
   iSrc = pParse->nTab++;
@@ -2024,14 +2025,18 @@
   regRowid = sqlite3GetTempReg(pParse);
   sqlite3OpenTable(pParse, iDest, iDbDest, pDest, OP_OpenWrite);
   assert( HasRowid(pDest) || destHasUniqueIdx );
-  if( (pDest->iPKey<0 && pDest->pIndex!=0)          /* (1) */
+  if( (db->flags & SQLITE_Vacuum)==0 && (
+      (pDest->iPKey<0 && pDest->pIndex!=0)          /* (1) */
    || destHasUniqueIdx                              /* (2) */
    || (onError!=OE_Abort && onError!=OE_Rollback)   /* (3) */
-  ){
+  )){
     /* In some circumstances, we are able to run the xfer optimization
-    ** only if the destination table is initially empty.  This code makes
-    ** that determination.  Conditions under which the destination must
-    ** be empty:
+    ** only if the destination table is initially empty. Unless the
+    ** SQLITE_Vacuum flag is set, this block generates code to make
+    ** that determination. If SQLITE_Vacuum is set, then the destination
+    ** table is always empty.
+    **
+    ** Conditions under which the destination must be empty:
     **
     ** (1) There is no INTEGER PRIMARY KEY but there are indices.
     **     (If the destination is not initially empty, the rowid fields
@@ -2074,6 +2079,7 @@
     sqlite3TableLock(pParse, iDbSrc, pSrc->tnum, 0, pSrc->zName);
   }
   for(pDestIdx=pDest->pIndex; pDestIdx; pDestIdx=pDestIdx->pNext){
+    u8 useSeekResult = 0;
     for(pSrcIdx=pSrc->pIndex; ALWAYS(pSrcIdx); pSrcIdx=pSrcIdx->pNext){
       if( xferCompatibleIndex(pDestIdx, pSrcIdx) ) break;
     }
@@ -2087,7 +2093,33 @@
     VdbeComment((v, "%s", pDestIdx->zName));
     addr1 = sqlite3VdbeAddOp2(v, OP_Rewind, iSrc, 0); VdbeCoverage(v);
     sqlite3VdbeAddOp2(v, OP_RowKey, iSrc, regData);
+    if( db->flags & SQLITE_Vacuum ){
+      /* This INSERT command is part of a VACUUM operation, which guarantees
+      ** that the destination table is empty. If all indexed columns use
+      ** collation sequence BINARY, then it can also be assumed that the
+      ** index will be populated by inserting keys in strictly sorted 
+      ** order. In this case, instead of seeking within the b-tree as part
+      ** of every OP_IdxInsert opcode, an OP_Last is added before the
+      ** OP_IdxInsert to seek to the point within the b-tree where each key 
+      ** should be inserted. This is faster.
+      **
+      ** If any of the indexed columns use a collation sequence other than
+      ** BINARY, this optimization is disabled. This is because the user 
+      ** might change the definition of a collation sequence and then run
+      ** a VACUUM command. In that case keys may not be written in strictly
+      ** sorted order.  */
+      int i;
+      for(i=0; i<pSrcIdx->nColumn; i++){
+        char *zColl = pSrcIdx->azColl[i];
+        if( zColl && sqlite3_stricmp("BINARY", zColl) ) break;
+      }
+      if( i==pSrcIdx->nColumn ){
+        useSeekResult = OPFLAG_USESEEKRESULT;
+        sqlite3VdbeAddOp3(v, OP_Last, iDest, 0, -1);
+      }
+    }
     sqlite3VdbeAddOp3(v, OP_IdxInsert, iDest, regData, 1);
+    sqlite3VdbeChangeP5(v, useSeekResult);
     sqlite3VdbeAddOp2(v, OP_Next, iSrc, addr1+1); VdbeCoverage(v);
     sqlite3VdbeJumpHere(v, addr1);
     sqlite3VdbeAddOp2(v, OP_Close, iSrc, 0);
diff --git a/src/main.c b/src/main.c
index 6967131..d9ee77f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -62,7 +62,7 @@
 ** I/O active are written using this function.  These messages
 ** are intended for debugging activity only.
 */
-/* not-private */ void (*sqlite3IoTrace)(const char*, ...) = 0;
+SQLITE_API void (SQLITE_CDECL *sqlite3IoTrace)(const char*, ...) = 0;
 #endif
 
 /*
diff --git a/src/malloc.c b/src/malloc.c
index 264d046..f06e27d 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -162,6 +162,7 @@
 ** Initialize the memory allocation subsystem.
 */
 int sqlite3MallocInit(void){
+  int rc;
   if( sqlite3GlobalConfig.m.xMalloc==0 ){
     sqlite3MemSetDefault();
   }
@@ -197,7 +198,9 @@
     sqlite3GlobalConfig.szPage = 0;
     sqlite3GlobalConfig.nPage = 0;
   }
-  return sqlite3GlobalConfig.m.xInit(sqlite3GlobalConfig.m.pAppData);
+  rc = sqlite3GlobalConfig.m.xInit(sqlite3GlobalConfig.m.pAppData);
+  if( rc!=SQLITE_OK ) memset(&mem0, 0, sizeof(mem0));
+  return rc;
 }
 
 /*
diff --git a/src/os_unix.c b/src/os_unix.c
index a9c883a..1d867d7 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -3783,7 +3783,7 @@
   unixFile *pFile = (unixFile*)id;
   switch( op ){
     case SQLITE_FCNTL_WAL_BLOCK: {
-      pFile->ctrlFlags |= UNIXFILE_BLOCK;
+      /* pFile->ctrlFlags |= UNIXFILE_BLOCK; // Deferred feature */
       return SQLITE_OK;
     }
     case SQLITE_FCNTL_LOCKSTATE: {
diff --git a/src/os_win.c b/src/os_win.c
index 7463778..ef2f553 100644
--- a/src/os_win.c
+++ b/src/os_win.c
@@ -197,8 +197,10 @@
 #endif /* SQLITE_OS_WINRT */
 
 /*
-** This file mapping API is common to both Win32 and WinRT.
+** These file mapping APIs are common to both Win32 and WinRT.
 */
+
+WINBASEAPI BOOL WINAPI FlushViewOfFile(LPCVOID, SIZE_T);
 WINBASEAPI BOOL WINAPI UnmapViewOfFile(LPCVOID);
 #endif /* SQLITE_WIN32_FILEMAPPING_API */
 
@@ -1083,6 +1085,15 @@
 #define osUuidCreateSequential \
         ((RPC_STATUS(RPC_ENTRY*)(UUID*))aSyscall[78].pCurrent)
 
+#if !defined(SQLITE_NO_SYNC) && SQLITE_MAX_MMAP_SIZE>0
+  { "FlushViewOfFile",          (SYSCALL)FlushViewOfFile,        0 },
+#else
+  { "FlushViewOfFile",          (SYSCALL)0,                      0 },
+#endif
+
+#define osFlushViewOfFile \
+        ((BOOL(WINAPI*)(LPCVOID,SIZE_T))aSyscall[79].pCurrent)
+
 }; /* End of the overrideable system calls */
 
 /*
@@ -1966,11 +1977,11 @@
 /*
 ** Log a I/O error retry episode.
 */
-static void winLogIoerr(int nRetry){
+static void winLogIoerr(int nRetry, int lineno){
   if( nRetry ){
-    sqlite3_log(SQLITE_IOERR,
-      "delayed %dms for lock/sharing conflict",
-      winIoerrRetryDelay*nRetry*(nRetry+1)/2
+    sqlite3_log(SQLITE_NOTICE,
+      "delayed %dms for lock/sharing conflict at line %d",
+      winIoerrRetryDelay*nRetry*(nRetry+1)/2, lineno
     );
   }
 }
@@ -2450,7 +2461,8 @@
   assert( pFile->pShm==0 );
 #endif
   assert( pFile->h!=NULL && pFile->h!=INVALID_HANDLE_VALUE );
-  OSTRACE(("CLOSE file=%p\n", pFile->h));
+  OSTRACE(("CLOSE pid=%lu, pFile=%p, file=%p\n",
+           osGetCurrentProcessId(), pFile, pFile->h));
 
 #if SQLITE_MAX_MMAP_SIZE>0
   winUnmapfile(pFile);
@@ -2479,7 +2491,8 @@
     pFile->h = NULL;
   }
   OpenCounter(-1);
-  OSTRACE(("CLOSE file=%p, rc=%s\n", pFile->h, rc ? "ok" : "failed"));
+  OSTRACE(("CLOSE pid=%lu, pFile=%p, file=%p, rc=%s\n",
+           osGetCurrentProcessId(), pFile, pFile->h, rc ? "ok" : "failed"));
   return rc ? SQLITE_OK
             : winLogError(SQLITE_IOERR_CLOSE, osGetLastError(),
                           "winClose", pFile->zPath);
@@ -2507,7 +2520,8 @@
   assert( amt>0 );
   assert( offset>=0 );
   SimulateIOError(return SQLITE_IOERR_READ);
-  OSTRACE(("READ file=%p, buffer=%p, amount=%d, offset=%lld, lock=%d\n",
+  OSTRACE(("READ pid=%lu, pFile=%p, file=%p, buffer=%p, amount=%d, "
+           "offset=%lld, lock=%d\n", osGetCurrentProcessId(), pFile,
            pFile->h, pBuf, amt, offset, pFile->locktype));
 
 #if SQLITE_MAX_MMAP_SIZE>0
@@ -2516,7 +2530,8 @@
   if( offset<pFile->mmapSize ){
     if( offset+amt <= pFile->mmapSize ){
       memcpy(pBuf, &((u8 *)(pFile->pMapRegion))[offset], amt);
-      OSTRACE(("READ-MMAP file=%p, rc=SQLITE_OK\n", pFile->h));
+      OSTRACE(("READ-MMAP pid=%lu, pFile=%p, file=%p, rc=SQLITE_OK\n",
+               osGetCurrentProcessId(), pFile, pFile->h));
       return SQLITE_OK;
     }else{
       int nCopy = (int)(pFile->mmapSize - offset);
@@ -2530,7 +2545,8 @@
 
 #if SQLITE_OS_WINCE || defined(SQLITE_WIN32_NO_OVERLAPPED)
   if( winSeekFile(pFile, offset) ){
-    OSTRACE(("READ file=%p, rc=SQLITE_FULL\n", pFile->h));
+    OSTRACE(("READ pid=%lu, pFile=%p, file=%p, rc=SQLITE_FULL\n",
+             osGetCurrentProcessId(), pFile, pFile->h));
     return SQLITE_FULL;
   }
   while( !osReadFile(pFile->h, pBuf, amt, &nRead, 0) ){
@@ -2544,19 +2560,22 @@
     DWORD lastErrno;
     if( winRetryIoerr(&nRetry, &lastErrno) ) continue;
     pFile->lastErrno = lastErrno;
-    OSTRACE(("READ file=%p, rc=SQLITE_IOERR_READ\n", pFile->h));
+    OSTRACE(("READ pid=%lu, pFile=%p, file=%p, rc=SQLITE_IOERR_READ\n",
+             osGetCurrentProcessId(), pFile, pFile->h));
     return winLogError(SQLITE_IOERR_READ, pFile->lastErrno,
                        "winRead", pFile->zPath);
   }
-  winLogIoerr(nRetry);
+  winLogIoerr(nRetry, __LINE__);
   if( nRead<(DWORD)amt ){
     /* Unread parts of the buffer must be zero-filled */
     memset(&((char*)pBuf)[nRead], 0, amt-nRead);
-    OSTRACE(("READ file=%p, rc=SQLITE_IOERR_SHORT_READ\n", pFile->h));
+    OSTRACE(("READ pid=%lu, pFile=%p, file=%p, rc=SQLITE_IOERR_SHORT_READ\n",
+             osGetCurrentProcessId(), pFile, pFile->h));
     return SQLITE_IOERR_SHORT_READ;
   }
 
-  OSTRACE(("READ file=%p, rc=SQLITE_OK\n", pFile->h));
+  OSTRACE(("READ pid=%lu, pFile=%p, file=%p, rc=SQLITE_OK\n",
+           osGetCurrentProcessId(), pFile, pFile->h));
   return SQLITE_OK;
 }
 
@@ -2579,7 +2598,8 @@
   SimulateIOError(return SQLITE_IOERR_WRITE);
   SimulateDiskfullError(return SQLITE_FULL);
 
-  OSTRACE(("WRITE file=%p, buffer=%p, amount=%d, offset=%lld, lock=%d\n",
+  OSTRACE(("WRITE pid=%lu, pFile=%p, file=%p, buffer=%p, amount=%d, "
+           "offset=%lld, lock=%d\n", osGetCurrentProcessId(), pFile,
            pFile->h, pBuf, amt, offset, pFile->locktype));
 
 #if SQLITE_MAX_MMAP_SIZE>0
@@ -2588,7 +2608,8 @@
   if( offset<pFile->mmapSize ){
     if( offset+amt <= pFile->mmapSize ){
       memcpy(&((u8 *)(pFile->pMapRegion))[offset], pBuf, amt);
-      OSTRACE(("WRITE-MMAP file=%p, rc=SQLITE_OK\n", pFile->h));
+      OSTRACE(("WRITE-MMAP pid=%lu, pFile=%p, file=%p, rc=SQLITE_OK\n",
+               osGetCurrentProcessId(), pFile, pFile->h));
       return SQLITE_OK;
     }else{
       int nCopy = (int)(pFile->mmapSize - offset);
@@ -2651,17 +2672,20 @@
   if( rc ){
     if(   ( pFile->lastErrno==ERROR_HANDLE_DISK_FULL )
        || ( pFile->lastErrno==ERROR_DISK_FULL )){
-      OSTRACE(("WRITE file=%p, rc=SQLITE_FULL\n", pFile->h));
+      OSTRACE(("WRITE pid=%lu, pFile=%p, file=%p, rc=SQLITE_FULL\n",
+               osGetCurrentProcessId(), pFile, pFile->h));
       return winLogError(SQLITE_FULL, pFile->lastErrno,
                          "winWrite1", pFile->zPath);
     }
-    OSTRACE(("WRITE file=%p, rc=SQLITE_IOERR_WRITE\n", pFile->h));
+    OSTRACE(("WRITE pid=%lu, pFile=%p, file=%p, rc=SQLITE_IOERR_WRITE\n",
+             osGetCurrentProcessId(), pFile, pFile->h));
     return winLogError(SQLITE_IOERR_WRITE, pFile->lastErrno,
                        "winWrite2", pFile->zPath);
   }else{
-    winLogIoerr(nRetry);
+    winLogIoerr(nRetry, __LINE__);
   }
-  OSTRACE(("WRITE file=%p, rc=SQLITE_OK\n", pFile->h));
+  OSTRACE(("WRITE pid=%lu, pFile=%p, file=%p, rc=SQLITE_OK\n",
+           osGetCurrentProcessId(), pFile, pFile->h));
   return SQLITE_OK;
 }
 
@@ -2675,8 +2699,8 @@
 
   assert( pFile );
   SimulateIOError(return SQLITE_IOERR_TRUNCATE);
-  OSTRACE(("TRUNCATE file=%p, size=%lld, lock=%d\n",
-           pFile->h, nByte, pFile->locktype));
+  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, size=%lld, lock=%d\n",
+           osGetCurrentProcessId(), pFile, pFile->h, nByte, pFile->locktype));
 
   /* If the user has configured a chunk-size for this file, truncate the
   ** file so that it consists of an integer number of chunks (i.e. the
@@ -2708,7 +2732,8 @@
   }
 #endif
 
-  OSTRACE(("TRUNCATE file=%p, rc=%s\n", pFile->h, sqlite3ErrName(rc)));
+  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, rc=%s\n",
+           osGetCurrentProcessId(), pFile, pFile->h, sqlite3ErrName(rc)));
   return rc;
 }
 
@@ -2753,8 +2778,9 @@
   */
   SimulateDiskfullError( return SQLITE_FULL );
 
-  OSTRACE(("SYNC file=%p, flags=%x, lock=%d\n",
-           pFile->h, flags, pFile->locktype));
+  OSTRACE(("SYNC pid=%lu, pFile=%p, file=%p, flags=%x, lock=%d\n",
+           osGetCurrentProcessId(), pFile, pFile->h, flags,
+           pFile->locktype));
 
 #ifndef SQLITE_TEST
   UNUSED_PARAMETER(flags);
@@ -2769,19 +2795,38 @@
   ** no-op
   */
 #ifdef SQLITE_NO_SYNC
-  OSTRACE(("SYNC-NOP file=%p, rc=SQLITE_OK\n", pFile->h));
+  OSTRACE(("SYNC-NOP pid=%lu, pFile=%p, file=%p, rc=SQLITE_OK\n",
+           osGetCurrentProcessId(), pFile, pFile->h));
   return SQLITE_OK;
 #else
+#if SQLITE_MAX_MMAP_SIZE>0
+  if( pFile->pMapRegion ){
+    if( osFlushViewOfFile(pFile->pMapRegion, 0) ){
+      OSTRACE(("SYNC-MMAP pid=%lu, pFile=%p, pMapRegion=%p, "
+               "rc=SQLITE_OK\n", osGetCurrentProcessId(),
+               pFile, pFile->pMapRegion));
+    }else{
+      pFile->lastErrno = osGetLastError();
+      OSTRACE(("SYNC-MMAP pid=%lu, pFile=%p, pMapRegion=%p, "
+               "rc=SQLITE_IOERR_MMAP\n", osGetCurrentProcessId(),
+               pFile, pFile->pMapRegion));
+      return winLogError(SQLITE_IOERR_MMAP, pFile->lastErrno,
+                         "winSync1", pFile->zPath);
+    }
+  }
+#endif
   rc = osFlushFileBuffers(pFile->h);
   SimulateIOError( rc=FALSE );
   if( rc ){
-    OSTRACE(("SYNC file=%p, rc=SQLITE_OK\n", pFile->h));
+    OSTRACE(("SYNC pid=%lu, pFile=%p, file=%p, rc=SQLITE_OK\n",
+             osGetCurrentProcessId(), pFile, pFile->h));
     return SQLITE_OK;
   }else{
     pFile->lastErrno = osGetLastError();
-    OSTRACE(("SYNC file=%p, rc=SQLITE_IOERR_FSYNC\n", pFile->h));
+    OSTRACE(("SYNC pid=%lu, pFile=%p, file=%p, rc=SQLITE_IOERR_FSYNC\n",
+             osGetCurrentProcessId(), pFile, pFile->h));
     return winLogError(SQLITE_IOERR_FSYNC, pFile->lastErrno,
-                       "winSync", pFile->zPath);
+                       "winSync2", pFile->zPath);
   }
 #endif
 }
@@ -4752,7 +4797,7 @@
     }
   }
 #endif
-  winLogIoerr(cnt);
+  winLogIoerr(cnt, __LINE__);
 
   OSTRACE(("OPEN file=%p, name=%s, access=%lx, rc=%s\n", h, zUtf8Name,
            dwDesiredAccess, (h==INVALID_HANDLE_VALUE) ? "failed" : "ok"));
@@ -4936,7 +4981,7 @@
   if( rc && rc!=SQLITE_IOERR_DELETE_NOENT ){
     rc = winLogError(SQLITE_IOERR_DELETE, lastErrno, "winDelete", zFilename);
   }else{
-    winLogIoerr(cnt);
+    winLogIoerr(cnt, __LINE__);
   }
   sqlite3_free(zConverted);
   OSTRACE(("DELETE name=%s, rc=%s\n", zFilename, sqlite3ErrName(rc)));
@@ -4986,7 +5031,7 @@
         attr = sAttrData.dwFileAttributes;
       }
     }else{
-      winLogIoerr(cnt);
+      winLogIoerr(cnt, __LINE__);
       if( lastErrno!=ERROR_FILE_NOT_FOUND && lastErrno!=ERROR_PATH_NOT_FOUND ){
         sqlite3_free(zConverted);
         return winLogError(SQLITE_IOERR_ACCESS, lastErrno, "winAccess",
@@ -5555,7 +5600,7 @@
 
   /* Double-check that the aSyscall[] array has been constructed
   ** correctly.  See ticket [bb3a86e890c8e96ab] */
-  assert( ArraySize(aSyscall)==79 );
+  assert( ArraySize(aSyscall)==80 );
 
   /* get memory map allocation granularity */
   memset(&winSysInfo, 0, sizeof(SYSTEM_INFO));
diff --git a/src/printf.c b/src/printf.c
index 81efa05..9714fa1 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -261,15 +261,19 @@
       }
       if( width<0 ){
         flag_leftjustify = 1;
-        width = -width;
+        width = width >= -2147483647 ? -width : 0;
       }
       c = *++fmt;
     }else{
+      unsigned wx = 0;
       while( c>='0' && c<='9' ){
-        width = width*10 + c - '0';
+        wx = wx*10 + c - '0';
         c = *++fmt;
       }
+      testcase( wx>0x7fffffff );
+      width = wx & 0x7fffffff;
     }
+
     /* Get the precision */
     if( c=='.' ){
       precision = 0;
@@ -280,13 +284,18 @@
         }else{
           precision = va_arg(ap,int);
         }
-        if( precision<0 ) precision = -precision;
         c = *++fmt;
+        if( precision<0 ){
+          precision = precision >= -2147483647 ? -precision : -1;
+        }
       }else{
+        unsigned px = 0;
         while( c>='0' && c<='9' ){
-          precision = precision*10 + c - '0';
+          px = px*10 + c - '0';
           c = *++fmt;
         }
+        testcase( px>0x7fffffff );
+        precision = px & 0x7fffffff;
       }
     }else{
       precision = -1;
@@ -450,7 +459,8 @@
           else                         prefix = 0;
         }
         if( xtype==etGENERIC && precision>0 ) precision--;
-        for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
+        testcase( precision>0xfff );
+        for(idx=precision&0xfff, rounder=0.5; idx>0; idx--, rounder*=0.1){}
         if( xtype==etFLOAT ) realvalue += rounder;
         /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
         exp = 0;
@@ -505,8 +515,9 @@
         }else{
           e2 = exp;
         }
-        if( MAX(e2,0)+precision+width > etBUFSIZE - 15 ){
-          bufpt = zExtra = sqlite3Malloc( MAX(e2,0)+precision+width+15 );
+        if( MAX(e2,0)+(i64)precision+(i64)width > etBUFSIZE - 15 ){
+          bufpt = zExtra 
+              = sqlite3Malloc( MAX(e2,0)+(i64)precision+(i64)width+15 );
           if( bufpt==0 ){
             setStrAccumError(pAccum, STRACCUM_NOMEM);
             return;
@@ -738,7 +749,7 @@
 */
 static int sqlite3StrAccumEnlarge(StrAccum *p, int N){
   char *zNew;
-  assert( p->nChar+N >= p->nAlloc ); /* Only called if really needed */
+  assert( p->nChar+(i64)N >= p->nAlloc ); /* Only called if really needed */
   if( p->accError ){
     testcase(p->accError==STRACCUM_TOOBIG);
     testcase(p->accError==STRACCUM_NOMEM);
@@ -787,7 +798,10 @@
 ** Append N copies of character c to the given string buffer.
 */
 void sqlite3AppendChar(StrAccum *p, int N, char c){
-  if( p->nChar+N >= p->nAlloc && (N = sqlite3StrAccumEnlarge(p, N))<=0 ) return;
+  testcase( p->nChar + (i64)N > 0x7fffffff );
+  if( p->nChar+(i64)N >= p->nAlloc && (N = sqlite3StrAccumEnlarge(p, N))<=0 ){
+    return;
+  }
   while( (N--)>0 ) p->zText[p->nChar++] = c;
 }
 
diff --git a/src/resolve.c b/src/resolve.c
index 47df724..a7b14cd 100644
--- a/src/resolve.c
+++ b/src/resolve.c
@@ -1186,6 +1186,20 @@
         sqlite3ResolveExprNames(&sNC, p->pOffset) ){
       return WRC_Abort;
     }
+
+    /* If the SF_Converted flags is set, then this Select object was
+    ** was created by the convertCompoundSelectToSubquery() function.
+    ** In this case the ORDER BY clause (p->pOrderBy) should be resolved
+    ** as if it were part of the sub-query, not the parent. This block
+    ** moves the pOrderBy down to the sub-query. It will be moved back
+    ** after the names have been resolved.  */
+    if( p->selFlags & SF_Converted ){
+      Select *pSub = p->pSrc->a[0].pSelect;
+      assert( p->pSrc->nSrc==1 && isCompound==0 && p->pOrderBy );
+      assert( pSub->pPrior && pSub->pOrderBy==0 );
+      pSub->pOrderBy = p->pOrderBy;
+      p->pOrderBy = 0;
+    }
   
     /* Recursively resolve names in all subqueries
     */
@@ -1268,6 +1282,17 @@
     sNC.pNext = 0;
     sNC.ncFlags |= NC_AllowAgg;
 
+    /* If this is a converted compound query, move the ORDER BY clause from 
+    ** the sub-query back to the parent query. At this point each term
+    ** within the ORDER BY clause has been transformed to an integer value.
+    ** These integers will be replaced by copies of the corresponding result
+    ** set expressions by the call to resolveOrderGroupBy() below.  */
+    if( p->selFlags & SF_Converted ){
+      Select *pSub = p->pSrc->a[0].pSelect;
+      p->pOrderBy = pSub->pOrderBy;
+      pSub->pOrderBy = 0;
+    }
+
     /* Process the ORDER BY clause for singleton SELECT statements.
     ** The ORDER BY clause for compounds SELECT statements is handled
     ** below, after all of the result-sets for all of the elements of
diff --git a/src/select.c b/src/select.c
index 8fd0f15..90aaa84 100644
--- a/src/select.c
+++ b/src/select.c
@@ -3884,6 +3884,8 @@
   p->pPrior = 0;
   p->pNext = 0;
   p->selFlags &= ~SF_Compound;
+  assert( (p->selFlags & SF_Converted)==0 );
+  p->selFlags |= SF_Converted;
   assert( pNew->pPrior!=0 );
   pNew->pPrior->pNext = pNew;
   pNew->pLimit = 0;
diff --git a/src/shell.c b/src/shell.c
index b31ea16..7ff3eb6 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -370,7 +370,7 @@
 ** is written to iotrace.
 */
 #ifdef SQLITE_ENABLE_IOTRACE
-static void iotracePrintf(const char *zFormat, ...){
+static void SQLITE_CDECL iotracePrintf(const char *zFormat, ...){
   va_list ap;
   char *z;
   if( iotrace==0 ) return;
@@ -3144,7 +3144,7 @@
 
 #ifdef SQLITE_ENABLE_IOTRACE
   if( c=='i' && strncmp(azArg[0], "iotrace", n)==0 ){
-    extern void (*sqlite3IoTrace)(const char*, ...);
+    SQLITE_API extern void (SQLITE_CDECL *sqlite3IoTrace)(const char*, ...);
     if( iotrace && iotrace!=stdout ) fclose(iotrace);
     iotrace = 0;
     if( nArg<2 ){
@@ -3803,9 +3803,9 @@
                           azArg[2],
                           integerValue(azArg[3]),
                           integerValue(azArg[4]));
+            fprintf(p->out, "%d (0x%08x)\n", rc, rc);
           }else{
-            fprintf(stderr,"Usage: .testctrl initmode dbName onoff tnum\n");
-            rc = 1;
+            fprintf(stderr,"Usage: .testctrl imposter dbName onoff tnum\n");
           }
           break;
 
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 176d88e..61ae018 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -1226,6 +1226,7 @@
 #define SQLITE_DeferFKs       0x01000000  /* Defer all FK constraints */
 #define SQLITE_QueryOnly      0x02000000  /* Disable database changes */
 #define SQLITE_VdbeEQP        0x04000000  /* Debug EXPLAIN QUERY PLAN */
+#define SQLITE_Vacuum         0x08000000  /* Currently in a VACUUM */
 
 
 /*
@@ -2389,6 +2390,7 @@
 #define SF_MaybeConvert    0x0400  /* Need convertCompoundSelectToSubquery() */
 #define SF_Recursive       0x0800  /* The recursive part of a recursive CTE */
 #define SF_MinMaxAgg       0x1000  /* Aggregate containing min() or max() */
+#define SF_Converted       0x2000  /* By convertCompoundSelectToSubquery() */
 
 
 /*
@@ -3803,7 +3805,7 @@
 #ifdef SQLITE_ENABLE_IOTRACE
 # define IOTRACE(A)  if( sqlite3IoTrace ){ sqlite3IoTrace A; }
   void sqlite3VdbeIOTraceSql(Vdbe*);
-SQLITE_EXTERN void (*sqlite3IoTrace)(const char*,...);
+SQLITE_API SQLITE_EXTERN void (SQLITE_CDECL *sqlite3IoTrace)(const char*,...);
 #else
 # define IOTRACE(A)
 # define sqlite3VdbeIOTraceSql(X)
diff --git a/src/trigger.c b/src/trigger.c
index d2e7b5a..ed152d2 100644
--- a/src/trigger.c
+++ b/src/trigger.c
@@ -680,7 +680,6 @@
   pSrc = sqlite3SrcListAppend(pParse->db, 0, &pStep->target, 0);
   if( pSrc ){
     assert( pSrc->nSrc>0 );
-    assert( pSrc->a!=0 );
     iDb = sqlite3SchemaToIndex(pParse->db, pStep->pTrig->pSchema);
     if( iDb==0 || iDb>=2 ){
       sqlite3 *db = pParse->db;
diff --git a/src/vacuum.c b/src/vacuum.c
index dca43e2..adc802e 100644
--- a/src/vacuum.c
+++ b/src/vacuum.c
@@ -250,6 +250,8 @@
   ** an "INSERT INTO vacuum_db.xxx SELECT * FROM main.xxx;" to copy
   ** the contents to the temporary database.
   */
+  assert( (db->flags & SQLITE_Vacuum)==0 );
+  db->flags |= SQLITE_Vacuum;
   rc = execExecSql(db, pzErrMsg,
       "SELECT 'INSERT INTO vacuum_db.' || quote(name) "
       "|| ' SELECT * FROM main.' || quote(name) || ';'"
@@ -257,6 +259,8 @@
       "WHERE type = 'table' AND name!='sqlite_sequence' "
       "  AND coalesce(rootpage,1)>0"
   );
+  assert( (db->flags & SQLITE_Vacuum)!=0 );
+  db->flags &= ~SQLITE_Vacuum;
   if( rc!=SQLITE_OK ) goto end_of_vacuum;
 
   /* Copy over the sequence table
diff --git a/src/vdbe.c b/src/vdbe.c
index 8fea505..187610e 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -1920,11 +1920,15 @@
         testcase( pIn1->flags & MEM_Int );
         testcase( pIn1->flags & MEM_Real );
         sqlite3VdbeMemStringify(pIn1, encoding, 1);
+        testcase( (flags1&MEM_Dyn) != (pIn1->flags&MEM_Dyn) );
+        flags1 = (pIn1->flags & ~MEM_TypeMask) | (flags1 & MEM_TypeMask);
       }
       if( (pIn3->flags & MEM_Str)==0 && (pIn3->flags & (MEM_Int|MEM_Real))!=0 ){
         testcase( pIn3->flags & MEM_Int );
         testcase( pIn3->flags & MEM_Real );
         sqlite3VdbeMemStringify(pIn3, encoding, 1);
+        testcase( (flags3&MEM_Dyn) != (pIn3->flags&MEM_Dyn) );
+        flags3 = (pIn3->flags & ~MEM_TypeMask) | (flags3 & MEM_TypeMask);
       }
     }
     assert( pOp->p4type==P4_COLLSEQ || pOp->p4.pColl==0 );
@@ -1961,7 +1965,9 @@
     }
   }
   /* Undo any changes made by applyAffinity() to the input registers. */
+  assert( (pIn1->flags & MEM_Dyn) == (flags1 & MEM_Dyn) );
   pIn1->flags = flags1;
+  assert( (pIn3->flags & MEM_Dyn) == (flags3 & MEM_Dyn) );
   pIn3->flags = flags3;
   break;
 }
@@ -4484,7 +4490,7 @@
   break;
 }
 
-/* Opcode: Last P1 P2 * * *
+/* Opcode: Last P1 P2 P3 * *
 **
 ** The next use of the Rowid or Column or Prev instruction for P1 
 ** will refer to the last entry in the database table or index.
@@ -4511,6 +4517,7 @@
   pC->nullRow = (u8)res;
   pC->deferredMoveto = 0;
   pC->cacheStatus = CACHE_STALE;
+  pC->seekResult = pOp->p3;
 #ifdef SQLITE_DEBUG
   pC->seekOp = OP_Last;
 #endif
diff --git a/src/vdbesort.c b/src/vdbesort.c
index 547dce2..f4b995c 100644
--- a/src/vdbesort.c
+++ b/src/vdbesort.c
@@ -1656,7 +1656,7 @@
         pReadr2 = &pMerger->aReadr[ pMerger->aTree[i ^ 0x0001] ];
         bCached = 0;
       }else{
-        bCached = (pReadr1->pFd!=0);
+        if( pReadr1->pFd ) bCached = 0;
         pMerger->aTree[i] = (int)(pReadr2 - pMerger->aReadr);
         pReadr1 = &pMerger->aReadr[ pMerger->aTree[i ^ 0x0001] ];
       }
diff --git a/src/vtab.c b/src/vtab.c
index 23f49ba..d17aa14 100644
--- a/src/vtab.c
+++ b/src/vtab.c
@@ -24,6 +24,8 @@
 struct VtabCtx {
   VTable *pVTable;    /* The virtual table being constructed */
   Table *pTab;        /* The Table object to which the virtual table belongs */
+  VtabCtx *pPrior;    /* Parent context (if any) */
+  int bDeclared;      /* True after sqlite3_declare_vtab() is called */
 };
 
 /*
@@ -487,15 +489,27 @@
   int (*xConstruct)(sqlite3*,void*,int,const char*const*,sqlite3_vtab**,char**),
   char **pzErr
 ){
-  VtabCtx sCtx, *pPriorCtx;
+  VtabCtx sCtx;
   VTable *pVTable;
   int rc;
   const char *const*azArg = (const char *const*)pTab->azModuleArg;
   int nArg = pTab->nModuleArg;
   char *zErr = 0;
-  char *zModuleName = sqlite3MPrintf(db, "%s", pTab->zName);
+  char *zModuleName;
   int iDb;
+  VtabCtx *pCtx;
 
+  /* Check that the virtual-table is not already being initialized */
+  for(pCtx=db->pVtabCtx; pCtx; pCtx=pCtx->pPrior){
+    if( pCtx->pTab==pTab ){
+      *pzErr = sqlite3MPrintf(db, 
+          "vtable constructor called recursively: %s", pTab->zName
+      );
+      return SQLITE_LOCKED;
+    }
+  }
+
+  zModuleName = sqlite3MPrintf(db, "%s", pTab->zName);
   if( !zModuleName ){
     return SQLITE_NOMEM;
   }
@@ -516,11 +530,13 @@
   assert( xConstruct );
   sCtx.pTab = pTab;
   sCtx.pVTable = pVTable;
-  pPriorCtx = db->pVtabCtx;
+  sCtx.pPrior = db->pVtabCtx;
+  sCtx.bDeclared = 0;
   db->pVtabCtx = &sCtx;
   rc = xConstruct(db, pMod->pAux, nArg, azArg, &pVTable->pVtab, &zErr);
-  db->pVtabCtx = pPriorCtx;
+  db->pVtabCtx = sCtx.pPrior;
   if( rc==SQLITE_NOMEM ) db->mallocFailed = 1;
+  assert( sCtx.pTab==pTab );
 
   if( SQLITE_OK!=rc ){
     if( zErr==0 ){
@@ -536,7 +552,7 @@
     memset(pVTable->pVtab, 0, sizeof(pVTable->pVtab[0]));
     pVTable->pVtab->pModule = pMod->pModule;
     pVTable->nRef = 1;
-    if( sCtx.pTab ){
+    if( sCtx.bDeclared==0 ){
       const char *zFormat = "vtable constructor did not declare schema: %s";
       *pzErr = sqlite3MPrintf(db, zFormat, pTab->zName);
       sqlite3VtabUnlock(pVTable);
@@ -706,8 +722,8 @@
 ** virtual table module.
 */
 int sqlite3_declare_vtab(sqlite3 *db, const char *zCreateTable){
+  VtabCtx *pCtx = db->pVtabCtx;
   Parse *pParse;
-
   int rc = SQLITE_OK;
   Table *pTab;
   char *zErr = 0;
@@ -718,11 +734,12 @@
   }
 #endif
   sqlite3_mutex_enter(db->mutex);
-  if( !db->pVtabCtx || !(pTab = db->pVtabCtx->pTab) ){
+  if( !pCtx || pCtx->bDeclared ){
     sqlite3Error(db, SQLITE_MISUSE);
     sqlite3_mutex_leave(db->mutex);
     return SQLITE_MISUSE_BKPT;
   }
+  pTab = pCtx->pTab;
   assert( (pTab->tabFlags & TF_Virtual)!=0 );
 
   pParse = sqlite3StackAllocZero(db, sizeof(*pParse));
@@ -745,7 +762,7 @@
         pParse->pNewTable->nCol = 0;
         pParse->pNewTable->aCol = 0;
       }
-      db->pVtabCtx->pTab = 0;
+      pCtx->bDeclared = 1;
     }else{
       sqlite3ErrorWithMsg(db, SQLITE_ERROR, (zErr ? "%s" : 0), zErr);
       sqlite3DbFree(db, zErr);
diff --git a/test/attach.test b/test/attach.test
index be5f988..31c24e6 100644
--- a/test/attach.test
+++ b/test/attach.test
@@ -859,4 +859,16 @@
   }] 9 end
 } {4 noname {} 5 inmem {}}
 
+# Attach with a very long URI filename.
+#
+db close
+sqlite3 db test.db -uri 1
+do_execsql_test attach-11.1 {
+  ATTACH printf('file:%09000x/x.db?mode=memory&cache=shared',1) AS aux1;
+  CREATE TABLE aux1.t1(x,y);
+  INSERT INTO aux1.t1(x,y) VALUES(1,2),(3,4);
+  SELECT * FROM aux1.t1;
+} {1 2 3 4}
+
+
 finish_test
diff --git a/test/corruptJ.test b/test/corruptJ.test
new file mode 100644
index 0000000..c08e628
--- /dev/null
+++ b/test/corruptJ.test
@@ -0,0 +1,80 @@
+# 2015-03-30
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# Corruption consisting of a database page that thinks it is a child
+# of itself.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix corruptJ
+
+if {[permutation]=="mmap"} {
+  finish_test
+  return
+}
+
+# Do not use a codec for tests in this file, as the database file is
+# manipulated directly using tcl scripts (using the [hexio_write] command).
+#
+do_not_use_codec
+database_may_be_corrupt
+
+# Initialize the database.
+#
+do_execsql_test 1.1 {
+  PRAGMA page_size=1024;
+  PRAGMA auto_vacuum=0;
+  CREATE TABLE t1(a,b);
+  WITH RECURSIVE c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<10)
+    INSERT INTO t1(a,b) SELECT i, zeroblob(700) FROM c;
+} {}
+db close
+
+# Corrupt the root page of the t1 table such that the left-child pointer
+# for the very first cell points back to the root.  Then try to DROP the
+# table.  The clearDatabasePage() routine should not loop.
+#
+do_test 1.2 {
+  hexio_write test.db [expr {2*1024-2}] 02
+  sqlite3 db test.db
+  catchsql { DROP TABLE t1 }
+} {1 {database disk image is malformed}}
+
+# Similar test using a WITHOUT ROWID table
+#
+do_test 2.1 {
+  db close
+  forcedelete test.db
+  sqlite3 db test.db
+  db eval {
+    PRAGMA page_size=1024;
+    PRAGMA auto_vacuum=0;
+    CREATE TABLE t1(a,b,PRIMARY KEY(a,b)) WITHOUT ROWID;
+    WITH RECURSIVE c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<100)
+      INSERT INTO t1(a,b) SELECT i, zeroblob(200) FROM c;
+  }
+} {}
+
+# The table is three levels deep.  Corrupt the left child of an intermediate
+# page so that it points back to the root page.
+#
+do_test 2.2 {
+  db close
+  hexio_read test.db [expr {9*1024+391}] 8
+} {00000008814D0401}
+do_test 2.2b {
+  hexio_write test.db [expr {9*1024+391}] 00000002
+  sqlite3 db test.db
+  catchsql { PRAGMA secure_delete=ON; DROP TABLE t1; }
+} {1 {database disk image is malformed}}
+
+finish_test
diff --git a/test/e_walauto.test b/test/e_walauto.test
index b624b24..a1f4eb7 100644
--- a/test/e_walauto.test
+++ b/test/e_walauto.test
@@ -15,6 +15,14 @@
 source $testdir/wal_common.tcl
 set testprefix e_walauto
 
+# Do not run this test on OpenBSD, as it depends on read() and mmap both
+# accessing the same coherent view of the "test.db-shm" file. This doesn't
+# work on OpenBSD.
+#
+if {$tcl_platform(os) == "OpenBSD"} {
+  finish_test
+  return
+}
 
 proc read_nbackfill {} {
   seek $::shmfd 96
diff --git a/test/fts3fault2.test b/test/fts3fault2.test
index f2d10bc..030ff73 100644
--- a/test/fts3fault2.test
+++ b/test/fts3fault2.test
@@ -155,4 +155,23 @@
   }
 }
 
+reset_db
+do_test 6.0 {
+  execsql {
+    CREATE VIRTUAL TABLE t6 USING fts4(x,order=DESC);
+    INSERT INTO t6(docid, x) VALUES(-1,'a b');
+    INSERT INTO t6(docid, x) VALUES(1, 'b');
+  }
+  faultsim_save_and_close
+} {}
+
+do_faultsim_test 6.1 -faults oom* -prep {
+  faultsim_restore_and_reopen
+  db eval {SELECT * FROM sqlite_master}
+} -body {
+  execsql { SELECT docid FROM t6 WHERE t6 MATCH '"a* b"' }
+} -test {
+  faultsim_test_result {0 -1}
+}
+
 finish_test
diff --git a/test/fts3prefix.test b/test/fts3prefix.test
index 8ffabe8..e8d2b2b 100644
--- a/test/fts3prefix.test
+++ b/test/fts3prefix.test
@@ -274,4 +274,22 @@
   SELECT md5sum(quote(root)) FROM t1_segdir;
 } [db eval {SELECT md5sum(quote(root)) FROM t2_segdir}]
 
+
+do_execsql_test 7.0 {
+  CREATE VIRTUAL TABLE t6 USING fts4(x,order=DESC);
+  INSERT INTO t6(docid, x) VALUES(-1,'a b');
+  INSERT INTO t6(docid, x) VALUES(1, 'b');
+}
+do_execsql_test 7.1 {
+  SELECT docid FROM t6 WHERE t6 MATCH '"a* b"';
+} {-1}
+do_execsql_test 7.2 {
+  SELECT docid FROM t6 WHERE t6 MATCH 'a*';
+} {-1}
+do_execsql_test 7.3 {
+  SELECT docid FROM t6 WHERE t6 MATCH 'a* b';
+} {-1}
+
+
+
 finish_test
diff --git a/test/fts4content.test b/test/fts4content.test
index 6b2cd3c..481c6ec 100644
--- a/test/fts4content.test
+++ b/test/fts4content.test
@@ -48,6 +48,9 @@
 #
 #   9.* - Test using content=xxx where xxx is a virtual table.
 #
+#   11.* - Test that circular references (e.g. "t1(content=t1)") are
+#          detected.
+#
 
 do_execsql_test 1.1.1 {
   CREATE TABLE t1(a, b, c);
@@ -406,7 +409,7 @@
 # 
 do_catchsql_test 6.1.1 {
   CREATE VIRTUAL TABLE ft7 USING fts4(content=t7);
-} {1 {vtable constructor failed: ft7}}
+} {1 {no such table: main.t7}}
 
 do_execsql_test 6.2.1 {
   CREATE TABLE t7(one, two);
@@ -433,7 +436,7 @@
 }
 do_catchsql_test 6.2.4 {
   SELECT * FROM ft7;
-} {1 {vtable constructor failed: ft7}}
+} {1 {no such table: main.t7}}
 do_execsql_test 6.2.5 {
   CREATE TABLE t7(x, y);
   INSERT INTO t7 VALUES('A B', 'B A');
@@ -622,4 +625,15 @@
   {...c d [e] f g...}
 }
 
+#-------------------------------------------------------------------------
+# Test cases 11.*
+# 
+reset_db
+
+do_catchsql_test 11.1 {
+  CREATE VIRTUAL TABLE x1 USING fts4(content=x1);
+} {1 {vtable constructor called recursively: x1}}
+
+
 finish_test
+
diff --git a/test/printf.test b/test/printf.test
index 7322272..6103d8a 100644
--- a/test/printf.test
+++ b/test/printf.test
@@ -472,6 +472,18 @@
   sqlite3_mprintf_int {abc: (%#6d) (%#6x) (%#6o) :xyz}\
        0xff676981 0xff676981 0xff676981
 } {abc: (-9999999) (0xff676981) (037731664601) :xyz}
+do_test printf-1.17.1 {
+  sqlite3_mprintf_int {abd: %2147483647d %2147483647x %2147483647o} 1 1 1
+} {}
+do_test printf-1.17.2 {
+  sqlite3_mprintf_int {abd: %*d %x} 2147483647 1 1
+} {}
+do_test printf-1.17.3 {
+  sqlite3_mprintf_int {abd: %*d %x} -2147483648 1 1
+} {abd: 1 1}
+do_test printf-1.17.4 {
+  sqlite3_mprintf_int {abd: %.2147483648d %x %x} 1 1 1
+} {/.*/}
 do_test printf-2.1.1.1 {
   sqlite3_mprintf_double {abc: (%*.*f) :xyz} 1 1 0.001
 } {abc: (0.0) :xyz}
@@ -526,6 +538,9 @@
 do_test printf-2.1.2.9 {
   sqlite3_mprintf_double {abc: %d %d (%1.1g) :xyz} 1 1 1.0e-20
 } {abc: 1 1 (1e-20) :xyz}
+do_test printf-2.1.2.10 {
+  sqlite3_mprintf_double {abc: %*.*f}  2000000000 1000000000 1.0e-20
+} {abc: }
 do_test printf-2.1.3.1 {
   sqlite3_mprintf_double {abc: (%*.*f) :xyz} 1 1 1.0
 } {abc: (1.0) :xyz}
@@ -3466,6 +3481,15 @@
 do_test printf-3.6 {
   sqlite3_mprintf_str {%d %d A String: (%-30s)} 1 2 {This is the string}
 } [format {%d %d A String: (%-30s)} 1 2 {This is the string}]
+do_test printf-3.7 {
+  sqlite3_mprintf_str {%d A String: (%*s)} 1 2147483647 {This is the string}
+} []
+do_test printf-3.8 {
+  sqlite3_mprintf_str {%d A String: (%*s)} 1 -2147483648 {This is the string}
+} {1 A String: (This is the string)}
+do_test printf-3.9 {
+  sqlite3_mprintf_str {%d A String: (%.*s)} 1 -2147483648 {This is the string}
+} {1 A String: (This is the string)}
 do_test snprintf-3.11 {
   sqlite3_snprintf_str 2 {x%d %d %s} 10 10 {This is the string}
 } {x}
@@ -3685,6 +3709,9 @@
 do_test printf-13.6 {
   sqlite3_mprintf_hexdouble %.20f fff8000000000000
 } {NaN}
+do_test printf-13.7 {
+  sqlite3_mprintf_hexdouble %2147483648.10000f 4693b8b5b5056e17
+} {/100000000000000000000000000000000.00/}
 
 do_test printf-14.1 {
   sqlite3_mprintf_str {abc-%y-123} 0 0 {not used}
diff --git a/test/selectA.test b/test/selectA.test
index 6e593e8..0338338 100644
--- a/test/selectA.test
+++ b/test/selectA.test
@@ -1375,4 +1375,64 @@
 } {/2 . 3 . 4 . 5 . 6 . 7 ./}
 
 
+proc strip_rnd {explain} {
+  regexp -all {sqlite_sq_[0123456789ABCDEF]*} $explain sqlite_sq
+}
+
+proc do_same_test {tn q1 args} {
+  set r2 [strip_rnd [db eval "EXPLAIN $q1"]]
+  set i 1
+  foreach q $args {
+    set tst [subst -nocommands {strip_rnd [db eval "EXPLAIN $q"]}]
+    uplevel do_test $tn.$i [list $tst] [list $r2]
+    incr i
+  }
+}
+
+do_execsql_test 5.0 {
+  CREATE TABLE t8(a, b);
+  CREATE TABLE t9(c, d);
+} {}
+
+do_same_test 5.1 {
+  SELECT a, b FROM t8 INTERSECT SELECT c, d FROM t9 ORDER BY a;
+} {
+  SELECT a, b FROM t8 INTERSECT SELECT c, d FROM t9 ORDER BY t8.a;
+} {
+  SELECT a, b FROM t8 INTERSECT SELECT c, d FROM t9 ORDER BY 1;
+} {
+  SELECT a, b FROM t8 INTERSECT SELECT c, d FROM t9 ORDER BY c;
+} {
+  SELECT a, b FROM t8 INTERSECT SELECT c, d FROM t9 ORDER BY t9.c;
+}
+
+do_same_test 5.2 {
+  SELECT a, b FROM t8 UNION SELECT c, d FROM t9 ORDER BY a COLLATE NOCASE
+} {
+  SELECT a, b FROM t8 UNION SELECT c, d FROM t9 ORDER BY t8.a COLLATE NOCASE
+} {
+  SELECT a, b FROM t8 UNION SELECT c, d FROM t9 ORDER BY 1 COLLATE NOCASE
+} {
+  SELECT a, b FROM t8 UNION SELECT c, d FROM t9 ORDER BY c COLLATE NOCASE
+} {
+  SELECT a, b FROM t8 UNION SELECT c, d FROM t9 ORDER BY t9.c COLLATE NOCASE
+}
+
+do_same_test 5.3 {
+  SELECT a, b FROM t8 EXCEPT SELECT c, d FROM t9 ORDER BY b, c COLLATE NOCASE
+} {
+  SELECT a, b FROM t8 EXCEPT SELECT c, d FROM t9 ORDER BY 2, 1 COLLATE NOCASE
+} {
+  SELECT a, b FROM t8 EXCEPT SELECT c, d FROM t9 ORDER BY d, a COLLATE NOCASE
+} {
+  SELECT a, b FROM t8 EXCEPT SELECT * FROM t9 ORDER BY t9.d, c COLLATE NOCASE
+} {
+  SELECT * FROM t8 EXCEPT SELECT c, d FROM t9 ORDER BY d, t8.a COLLATE NOCASE
+}
+
+do_catchsql_test 5.4 {
+  SELECT * FROM t8 UNION SELECT * FROM t9 ORDER BY a+b COLLATE NOCASE
+} {1 {1st ORDER BY term does not match any column in the result set}}
+
+
 finish_test
diff --git a/test/walblock.test b/test/walblock.test
index 0b0b224..23167a8 100644
--- a/test/walblock.test
+++ b/test/walblock.test
@@ -15,6 +15,7 @@
 source $testdir/lock_common.tcl
 source $testdir/wal_common.tcl
 
+finish_test; return;    #  Feature currently not implemented.
 ifcapable !wal {finish_test ; return }
 if {$::tcl_platform(platform)!="unix"} { finish_test ; return }
 set testprefix walblock
@@ -111,7 +112,3 @@
 
 
 finish_test
-
-
-
-
diff --git a/test/win32lock.test b/test/win32lock.test
index cff1ed3..d1f3d1a 100644
--- a/test/win32lock.test
+++ b/test/win32lock.test
@@ -64,6 +64,7 @@
     if {[info exists ::log] && $::log!=""} {
       do_test win32lock-1.2-$delay1-log1 {
         regsub {\d+} $::log # x
+        regsub { at line \d+} $x "" x
         set x
       } {{delayed #ms for lock/sharing conflict}}
     }
@@ -112,6 +113,7 @@
     if {[info exists ::log] && $::log!=""} {
       do_test win32lock-2.2-$delay1-log1 {
         regsub {\d+} $::log # x
+        regsub { at line \d+} $x "" x
         set x
       } {{delayed #ms for lock/sharing conflict}}
     }
diff --git a/tool/lemon.c b/tool/lemon.c
index 4ada425..cc3066b 100644
--- a/tool/lemon.c
+++ b/tool/lemon.c
@@ -1731,7 +1731,7 @@
   char *ep;
   char *set[LISTSIZE];
   int i;
-  offset = (unsigned long)next - (unsigned long)list;
+  offset = (unsigned long)((char*)next - (char*)list);
   for(i=0; i<LISTSIZE; i++) set[i] = 0;
   while( list ){
     ep = list;
@@ -1875,7 +1875,7 @@
         if( *end ){
           if( err ){
             fprintf(err,"%sillegal character in floating-point argument.\n",emsg);
-            errline(i,((unsigned long)end)-(unsigned long)argv[i],err);
+            errline(i,(int)((char*)end-(char*)argv[i]),err);
           }
           errcnt++;
         }
@@ -1886,7 +1886,7 @@
         if( *end ){
           if( err ){
             fprintf(err,"%sillegal character in integer argument.\n",emsg);
-            errline(i,((unsigned long)end)-(unsigned long)argv[i],err);
+            errline(i,(int)((char*)end-(char*)argv[i]),err);
           }
           errcnt++;
         }
diff --git a/tool/showlocks.c b/tool/showlocks.c
new file mode 100644
index 0000000..752c535
--- /dev/null
+++ b/tool/showlocks.c
@@ -0,0 +1,64 @@
+/*
+** This file implements a simple command-line utility that shows all of the
+** Posix Advisory Locks on a file.
+**
+** Usage:
+**
+**     showlocks FILENAME
+**
+** To compile:  gcc -o showlocks showlocks.c
+*/
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* This utility only looks for locks in the first 2 billion bytes */
+#define MX_LCK 2147483647
+
+/*
+** Print all locks on the inode of "fd" that occur in between
+** lwr and upr, inclusive.
+*/
+static int showLocksInRange(int fd, off_t lwr, off_t upr){
+  int cnt = 0;
+  struct flock x;
+
+  x.l_type = F_WRLCK;
+  x.l_whence = SEEK_SET;
+  x.l_start = lwr;
+  x.l_len = upr-lwr;
+  fcntl(fd, F_GETLK, &x);
+  if( x.l_type==F_UNLCK ) return 0;
+  printf("start: %-12d len: %-5d pid: %-5d type: %s\n",
+       (int)x.l_start, (int)x.l_len,
+       x.l_pid, x.l_type==F_WRLCK ? "WRLCK" : "RDLCK");
+  cnt++;
+  if( x.l_start>lwr ){
+    cnt += showLocksInRange(fd, lwr, x.l_start-1);
+  }
+  if( x.l_start+x.l_len<upr ){
+    cnt += showLocksInRange(fd, x.l_start+x.l_len+1, upr);
+  }
+  return cnt;
+}
+
+int main(int argc, char **argv){
+  int fd;
+  int cnt;
+
+  if( argc!=2 ){
+    fprintf(stderr, "Usage: %s FILENAME\n", argv[0]);
+    return 1;
+  }
+  fd = open(argv[1], O_RDWR, 0);
+  if( fd<0 ){
+    fprintf(stderr, "%s: cannot open %s\n", argv[0], argv[1]);
+    return 1;
+  }
+  cnt = showLocksInRange(fd, 0, MX_LCK);
+  if( cnt==0 ) printf("no locks\n");  
+  close(fd);
+  return 0;
+}
diff --git a/tool/sqldiff.c b/tool/sqldiff.c
new file mode 100644
index 0000000..53c5977
--- /dev/null
+++ b/tool/sqldiff.c
@@ -0,0 +1,817 @@
+/*
+** 2015-04-06
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+**
+** This is a utility problem that computes the differences in content
+** between two SQLite databases.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <string.h>
+#include "sqlite3.h"
+
+/*
+** All global variables are gathered into the "g" singleton.
+*/
+struct GlobalVars {
+  const char *zArgv0;       /* Name of program */
+  int bSchemaOnly;          /* Only show schema differences */
+  int bSchemaPK;            /* Use the schema-defined PK, not the true PK */
+  unsigned fDebug;          /* Debug flags */
+  sqlite3 *db;              /* The database connection */
+} g;
+
+/*
+** Allowed values for g.fDebug
+*/
+#define DEBUG_COLUMN_NAMES  0x000001
+#define DEBUG_DIFF_SQL      0x000002
+
+/*
+** Dynamic string object
+*/
+typedef struct Str Str;
+struct Str {
+  char *z;        /* Text of the string */
+  int nAlloc;     /* Bytes allocated in z[] */
+  int nUsed;      /* Bytes actually used in z[] */
+};
+
+/*
+** Initialize a Str object
+*/
+static void strInit(Str *p){
+  p->z = 0;
+  p->nAlloc = 0;
+  p->nUsed = 0;
+}
+  
+/*
+** Print an error resulting from faulting command-line arguments and
+** abort the program.
+*/
+static void cmdlineError(const char *zFormat, ...){
+  va_list ap;
+  fprintf(stderr, "%s: ", g.zArgv0);
+  va_start(ap, zFormat);
+  vfprintf(stderr, zFormat, ap);
+  va_end(ap);
+  fprintf(stderr, "\n\"%s --help\" for more help\n", g.zArgv0);
+  exit(1);
+}
+
+/*
+** Print an error message for an error that occurs at runtime, then
+** abort the program.
+*/
+static void runtimeError(const char *zFormat, ...){
+  va_list ap;
+  fprintf(stderr, "%s: ", g.zArgv0);
+  va_start(ap, zFormat);
+  vfprintf(stderr, zFormat, ap);
+  va_end(ap);
+  fprintf(stderr, "\n");
+  exit(1);
+}
+
+/*
+** Free all memory held by a Str object
+*/
+static void strFree(Str *p){
+  sqlite3_free(p->z);
+  strInit(p);
+}
+
+/*
+** Add formatted text to the end of a Str object
+*/
+static void strPrintf(Str *p, const char *zFormat, ...){
+  int nNew;
+  for(;;){
+    if( p->z ){
+      va_list ap;
+      va_start(ap, zFormat);
+      sqlite3_vsnprintf(p->nAlloc-p->nUsed, p->z+p->nUsed, zFormat, ap);
+      va_end(ap);
+      nNew = (int)strlen(p->z + p->nUsed);
+    }else{
+      nNew = p->nAlloc;
+    }
+    if( p->nUsed+nNew < p->nAlloc-1 ){
+      p->nUsed += nNew;
+      break;
+    }
+    p->nAlloc = p->nAlloc*2 + 1000;
+    p->z = sqlite3_realloc(p->z, p->nAlloc);
+    if( p->z==0 ) runtimeError("out of memory");
+  }
+}
+
+
+
+/* Safely quote an SQL identifier.  Use the minimum amount of transformation
+** necessary to allow the string to be used with %s.
+**
+** Space to hold the returned string is obtained from sqlite3_malloc().  The
+** caller is responsible for ensuring this space is freed when no longer
+** needed.
+*/
+static char *safeId(const char *zId){
+  /* All SQLite keywords, in alphabetical order */
+  static const char *azKeywords[] = {
+    "ABORT", "ACTION", "ADD", "AFTER", "ALL", "ALTER", "ANALYZE", "AND", "AS",
+    "ASC", "ATTACH", "AUTOINCREMENT", "BEFORE", "BEGIN", "BETWEEN", "BY",
+    "CASCADE", "CASE", "CAST", "CHECK", "COLLATE", "COLUMN", "COMMIT",
+    "CONFLICT", "CONSTRAINT", "CREATE", "CROSS", "CURRENT_DATE",
+    "CURRENT_TIME", "CURRENT_TIMESTAMP", "DATABASE", "DEFAULT", "DEFERRABLE",
+    "DEFERRED", "DELETE", "DESC", "DETACH", "DISTINCT", "DROP", "EACH",
+    "ELSE", "END", "ESCAPE", "EXCEPT", "EXCLUSIVE", "EXISTS", "EXPLAIN",
+    "FAIL", "FOR", "FOREIGN", "FROM", "FULL", "GLOB", "GROUP", "HAVING", "IF",
+    "IGNORE", "IMMEDIATE", "IN", "INDEX", "INDEXED", "INITIALLY", "INNER",
+    "INSERT", "INSTEAD", "INTERSECT", "INTO", "IS", "ISNULL", "JOIN", "KEY",
+    "LEFT", "LIKE", "LIMIT", "MATCH", "NATURAL", "NO", "NOT", "NOTNULL",
+    "NULL", "OF", "OFFSET", "ON", "OR", "ORDER", "OUTER", "PLAN", "PRAGMA",
+    "PRIMARY", "QUERY", "RAISE", "RECURSIVE", "REFERENCES", "REGEXP",
+    "REINDEX", "RELEASE", "RENAME", "REPLACE", "RESTRICT", "RIGHT",
+    "ROLLBACK", "ROW", "SAVEPOINT", "SELECT", "SET", "TABLE", "TEMP",
+    "TEMPORARY", "THEN", "TO", "TRANSACTION", "TRIGGER", "UNION", "UNIQUE",
+    "UPDATE", "USING", "VACUUM", "VALUES", "VIEW", "VIRTUAL", "WHEN", "WHERE",
+    "WITH", "WITHOUT",
+  };
+  int lwr, upr, mid, c, i, x;
+  for(i=x=0; (c = zId[i])!=0; i++){
+    if( !isalpha(c) && c!='_' ){
+      if( i>0 && isdigit(c) ){
+        x++;
+      }else{
+        return sqlite3_mprintf("\"%w\"", zId);
+      }
+    }
+  }
+  if( x ) return sqlite3_mprintf("%s", zId);
+  lwr = 0;
+  upr = sizeof(azKeywords)/sizeof(azKeywords[0]) - 1;
+  while( lwr<=upr ){
+    mid = (lwr+upr)/2;
+    c = sqlite3_stricmp(azKeywords[mid], zId);
+    if( c==0 ) return sqlite3_mprintf("\"%w\"", zId);
+    if( c<0 ){
+      lwr = mid+1;
+    }else{
+      upr = mid-1;
+    }
+  }
+  return sqlite3_mprintf("%s", zId);
+}
+
+/*
+** Prepare a new SQL statement.  Print an error and abort if anything
+** goes wrong.
+*/
+static sqlite3_stmt *db_vprepare(const char *zFormat, va_list ap){
+  char *zSql;
+  int rc;
+  sqlite3_stmt *pStmt;
+
+  zSql = sqlite3_vmprintf(zFormat, ap);
+  if( zSql==0 ) runtimeError("out of memory");
+  rc = sqlite3_prepare_v2(g.db, zSql, -1, &pStmt, 0);
+  if( rc ){
+    runtimeError("SQL statement error: %s\n\"%s\"", sqlite3_errmsg(g.db),
+                 zSql);
+  }
+  sqlite3_free(zSql);
+  return pStmt;
+}
+static sqlite3_stmt *db_prepare(const char *zFormat, ...){
+  va_list ap;
+  sqlite3_stmt *pStmt;
+  va_start(ap, zFormat);
+  pStmt = db_vprepare(zFormat, ap);
+  va_end(ap);
+  return pStmt;
+}
+
+/*
+** Free a list of strings
+*/
+static void namelistFree(char **az){
+  if( az ){
+    int i;
+    for(i=0; az[i]; i++) sqlite3_free(az[i]);
+    sqlite3_free(az);
+  }
+}
+
+/*
+** Return a list of column names for the table zDb.zTab.  Space to
+** hold the list is obtained from sqlite3_malloc() and should released
+** using namelistFree() when no longer needed.
+**
+** Primary key columns are listed first, followed by data columns.
+** The number of columns in the primary key is returned in *pnPkey.
+**
+** Normally, the "primary key" in the previous sentence is the true
+** primary key - the rowid or INTEGER PRIMARY KEY for ordinary tables
+** or the declared PRIMARY KEY for WITHOUT ROWID tables.  However, if
+** the g.bSchemaPK flag is set, then the schema-defined PRIMARY KEY is
+** used in all cases.  In that case, entries that have NULL values in
+** any of their primary key fields will be excluded from the analysis.
+**
+** If the primary key for a table is the rowid but rowid is inaccessible,
+** then this routine returns a NULL pointer.
+**
+** Examples:
+**    CREATE TABLE t1(a INT UNIQUE, b INTEGER, c TEXT, PRIMARY KEY(c));
+**    *pnPKey = 1;
+**    az = { "rowid", "a", "b", "c", 0 }  // Normal case
+**    az = { "c", "a", "b", 0 }           // g.bSchemaPK==1
+**
+**    CREATE TABLE t2(a INT UNIQUE, b INTEGER, c TEXT, PRIMARY KEY(b));
+**    *pnPKey = 1;
+**    az = { "b", "a", "c", 0 }
+**
+**    CREATE TABLE t3(x,y,z,PRIMARY KEY(y,z));
+**    *pnPKey = 1                         // Normal case
+**    az = { "rowid", "x", "y", "z", 0 }  // Normal case
+**    *pnPKey = 2                         // g.bSchemaPK==1
+**    az = { "y", "x", "z", 0 }           // g.bSchemaPK==1
+**
+**    CREATE TABLE t4(x,y,z,PRIMARY KEY(y,z)) WITHOUT ROWID;
+**    *pnPKey = 2
+**    az = { "y", "z", "x", 0 }
+**
+**    CREATE TABLE t5(rowid,_rowid_,oid);
+**    az = 0     // The rowid is not accessible
+*/
+static char **columnNames(const char *zDb, const char *zTab, int *pnPKey){
+  char **az = 0;           /* List of column names to be returned */
+  int naz = 0;             /* Number of entries in az[] */
+  sqlite3_stmt *pStmt;     /* SQL statement being run */
+  char *zPkIdxName = 0;    /* Name of the PRIMARY KEY index */
+  int truePk = 0;          /* PRAGMA table_info indentifies the PK to use */
+  int nPK = 0;             /* Number of PRIMARY KEY columns */
+  int i, j;                /* Loop counters */
+
+  if( g.bSchemaPK==0 ){
+    /* Normal case:  Figure out what the true primary key is for the table.
+    **   *  For WITHOUT ROWID tables, the true primary key is the same as
+    **      the schema PRIMARY KEY, which is guaranteed to be present.
+    **   *  For rowid tables with an INTEGER PRIMARY KEY, the true primary
+    **      key is the INTEGER PRIMARY KEY.
+    **   *  For all other rowid tables, the rowid is the true primary key.
+    */
+    pStmt = db_prepare("PRAGMA %s.index_list=%Q", zDb, zTab);
+    while( SQLITE_ROW==sqlite3_step(pStmt) ){
+      if( sqlite3_stricmp((const char*)sqlite3_column_text(pStmt,3),"pk")==0 ){
+        zPkIdxName = sqlite3_mprintf("%s", sqlite3_column_text(pStmt, 1));
+        break;
+      }
+    }
+    sqlite3_finalize(pStmt);
+    if( zPkIdxName ){
+      int nKey = 0;
+      int nCol = 0;
+      truePk = 0;
+      pStmt = db_prepare("PRAGMA %s.index_xinfo=%Q", zDb, zPkIdxName);
+      while( SQLITE_ROW==sqlite3_step(pStmt) ){
+        nCol++;
+        if( sqlite3_column_int(pStmt,5) ){ nKey++; continue; }
+        if( sqlite3_column_int(pStmt,1)>=0 ) truePk = 1;
+      }
+      if( nCol==nKey ) truePk = 1;
+      if( truePk ){
+        nPK = nKey;
+      }else{
+        nPK = 1;
+      }
+      sqlite3_finalize(pStmt);
+      sqlite3_free(zPkIdxName);
+    }else{
+      truePk = 1;
+      nPK = 1;
+    }
+    pStmt = db_prepare("PRAGMA %s.table_info=%Q", zDb, zTab);
+  }else{
+    /* The g.bSchemaPK==1 case:  Use whatever primary key is declared
+    ** in the schema.  The "rowid" will still be used as the primary key
+    ** if the table definition does not contain a PRIMARY KEY.
+    */
+    nPK = 0;
+    pStmt = db_prepare("PRAGMA %s.table_info=%Q", zDb, zTab);
+    while( SQLITE_ROW==sqlite3_step(pStmt) ){
+      if( sqlite3_column_int(pStmt,5)>0 ) nPK++;
+    }
+    sqlite3_reset(pStmt);
+    if( nPK==0 ) nPK = 1;
+    truePk = 1;
+  }
+  *pnPKey = nPK;
+  naz = nPK;
+  az = sqlite3_malloc( sizeof(char*)*(nPK+1) );
+  if( az==0 ) runtimeError("out of memory");
+  memset(az, 0, sizeof(char*)*(nPK+1));
+  while( SQLITE_ROW==sqlite3_step(pStmt) ){
+    int iPKey;
+    if( truePk && (iPKey = sqlite3_column_int(pStmt,5))>0 ){
+      az[iPKey-1] = safeId((char*)sqlite3_column_text(pStmt,1));
+    }else{
+      az = sqlite3_realloc(az, sizeof(char*)*(naz+2) );
+      if( az==0 ) runtimeError("out of memory");
+      az[naz++] = safeId((char*)sqlite3_column_text(pStmt,1));
+    }
+  }
+  sqlite3_finalize(pStmt);
+  if( az ) az[naz] = 0;
+  if( az[0]==0 ){
+    const char *azRowid[] = { "rowid", "_rowid_", "oid" };
+    for(i=0; i<sizeof(azRowid)/sizeof(azRowid[0]); i++){
+      for(j=1; j<naz; j++){
+        if( sqlite3_stricmp(az[j], azRowid[i])==0 ) break;
+      }
+      if( j>=naz ){
+        az[0] = sqlite3_mprintf("%s", azRowid[i]);
+        break;
+      }
+    }
+    if( az[0]==0 ){
+      for(i=1; i<naz; i++) sqlite3_free(az[i]);
+      sqlite3_free(az);
+      az = 0;
+    }
+  }
+  return az;
+}
+
+/*
+** Print the sqlite3_value X as an SQL literal.
+*/
+static void printQuoted(sqlite3_value *X){
+  switch( sqlite3_value_type(X) ){
+    case SQLITE_FLOAT: {
+      double r1;
+      char zBuf[50];
+      r1 = sqlite3_value_double(X);
+      sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.15g", r1);
+      printf("%s", zBuf);
+      break;
+    }
+    case SQLITE_INTEGER: {
+      printf("%lld", sqlite3_value_int64(X));
+      break;
+    }
+    case SQLITE_BLOB: {
+      const unsigned char *zBlob = sqlite3_value_blob(X);
+      int nBlob = sqlite3_value_bytes(X);
+      if( zBlob ){
+        int i;
+        printf("x'");
+        for(i=0; i<nBlob; i++){
+          printf("%02x", zBlob[i]);
+        }
+        printf("'");
+      }else{
+        printf("NULL");
+      }
+      break;
+    }
+    case SQLITE_TEXT: {
+      const unsigned char *zArg = sqlite3_value_text(X);
+      int i, j;
+
+      if( zArg==0 ){
+        printf("NULL");
+      }else{
+        printf("'");
+        for(i=j=0; zArg[i]; i++){
+          if( zArg[i]=='\'' ){
+            printf("%.*s'", i-j+1, &zArg[j]);
+            j = i+1;
+          }
+        }
+        printf("%s'", &zArg[j]);
+      }
+      break;
+    }
+    case SQLITE_NULL: {
+      printf("NULL");
+      break;
+    }
+  }
+}
+
+/*
+** Output SQL that will recreate the aux.zTab table.
+*/
+static void dump_table(const char *zTab){
+  char *zId = safeId(zTab); /* Name of the table */
+  char **az = 0;            /* List of columns */
+  int nPk;                  /* Number of true primary key columns */
+  int nCol;                 /* Number of data columns */
+  int i;                    /* Loop counter */
+  sqlite3_stmt *pStmt;      /* SQL statement */
+  const char *zSep;         /* Separator string */
+  Str ins;                  /* Beginning of the INSERT statement */
+
+  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master WHERE name=%Q", zTab);
+  if( SQLITE_ROW==sqlite3_step(pStmt) ){
+    printf("%s;\n", sqlite3_column_text(pStmt,0));
+  }
+  sqlite3_finalize(pStmt);
+  if( !g.bSchemaOnly ){
+    az = columnNames("aux", zTab, &nPk);
+    strInit(&ins);
+    if( az==0 ){
+      pStmt = db_prepare("SELECT * FROM aux.%s", zId);
+      strPrintf(&ins,"INSERT INTO %s VALUES", zId);
+    }else{
+      Str sql;
+      strInit(&sql);
+      zSep =  "SELECT";
+      for(i=0; az[i]; i++){
+        strPrintf(&sql, "%s %s", zSep, az[i]);
+        zSep = ",";
+      }
+      strPrintf(&sql," FROM aux.%s", zId);
+      zSep = " ORDER BY";
+      for(i=1; i<=nPk; i++){
+        strPrintf(&sql, "%s %d", zSep, i);
+        zSep = ",";
+      }
+      pStmt = db_prepare("%s", sql.z);
+      strFree(&sql);
+      strPrintf(&ins, "INSERT INTO %s", zId);
+      zSep = "(";
+      for(i=0; az[i]; i++){
+        strPrintf(&ins, "%s%s", zSep, az[i]);
+        zSep = ",";
+      }
+      strPrintf(&ins,") VALUES");
+      namelistFree(az);
+    }
+    nCol = sqlite3_column_count(pStmt);
+    while( SQLITE_ROW==sqlite3_step(pStmt) ){
+      printf("%s",ins.z);
+      zSep = "(";
+      for(i=0; i<nCol; i++){
+        printf("%s",zSep);
+        printQuoted(sqlite3_column_value(pStmt,i));
+        zSep = ",";
+      }
+      printf(");\n");
+    }
+    sqlite3_finalize(pStmt);
+    strFree(&ins);
+  } /* endif !g.bSchemaOnly */
+  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master"
+                     " WHERE type='index' AND tbl_name=%Q AND sql IS NOT NULL",
+                     zTab);
+  while( SQLITE_ROW==sqlite3_step(pStmt) ){
+    printf("%s;\n", sqlite3_column_text(pStmt,0));
+  }
+  sqlite3_finalize(pStmt);
+}
+
+
+/*
+** Compute all differences for a single table.
+*/
+static void diff_one_table(const char *zTab){
+  char *zId = safeId(zTab); /* Name of table (translated for us in SQL) */
+  char **az = 0;            /* Columns in main */
+  char **az2 = 0;           /* Columns in aux */
+  int nPk;                  /* Primary key columns in main */
+  int nPk2;                 /* Primary key columns in aux */
+  int n;                    /* Number of columns in main */
+  int n2;                   /* Number of columns in aux */
+  int nQ;                   /* Number of output columns in the diff query */
+  int i;                    /* Loop counter */
+  const char *zSep;         /* Separator string */
+  Str sql;                  /* Comparison query */
+  sqlite3_stmt *pStmt;      /* Query statement to do the diff */
+
+  strInit(&sql);
+  if( g.fDebug==DEBUG_COLUMN_NAMES ){
+    /* Simply run columnNames() on all tables of the origin
+    ** database and show the results.  This is used for testing
+    ** and debugging of the columnNames() function.
+    */
+    az = columnNames("aux",zTab, &nPk);
+    if( az==0 ){
+      printf("Rowid not accessible for %s\n", zId);
+    }else{
+      printf("%s:", zId);
+      for(i=0; az[i]; i++){
+        printf(" %s", az[i]);
+        if( i+1==nPk ) printf(" *");
+      }
+      printf("\n");
+    }
+    goto end_diff_one_table;
+  }
+    
+
+  if( sqlite3_table_column_metadata(g.db,"aux",zTab,0,0,0,0,0,0) ){
+    if( !sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
+      /* Table missing from second database. */
+      printf("DROP TABLE %s;\n", zId);
+    }
+    goto end_diff_one_table;
+  }
+
+  if( sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
+    /* Table missing from source */
+    dump_table(zTab);
+    goto end_diff_one_table;
+  }
+
+  az = columnNames("main", zTab, &nPk);
+  az2 = columnNames("aux", zTab, &nPk2);
+  if( az && az2 ){
+    for(n=0; az[n]; n++){
+      if( sqlite3_stricmp(az[n],az2[n])!=0 ) break;
+    }
+  }
+  if( az==0
+   || az2==0
+   || nPk!=nPk2
+   || az[n]
+  ){
+    /* Schema mismatch */
+    printf("DROP TABLE %s;\n", zId);
+    dump_table(zTab);
+    goto end_diff_one_table;
+  }
+
+  /* Build the comparison query */
+  for(n2=n; az[n2]; n2++){}
+  nQ = nPk2+1+2*(n2-nPk2);
+  if( n2>nPk2 ){
+    zSep = "SELECT ";
+    for(i=0; i<nPk; i++){
+      strPrintf(&sql, "%sB.%s", zSep, az[i]);
+      zSep = ", ";
+    }
+    strPrintf(&sql, ", 1%s -- changed row\n", nPk==n ? "" : ",");
+    while( az[i] ){
+      strPrintf(&sql, "       A.%s IS NOT B.%s, B.%s%s\n",
+                az[i], az[i], az[i], i==n2-1 ? "" : ",");
+      i++;
+    }
+    strPrintf(&sql, "  FROM main.%s A, aux.%s B\n", zId, zId);
+    zSep = " WHERE";
+    for(i=0; i<nPk; i++){
+      strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
+      zSep = " AND";
+    }
+    zSep = "\n   AND (";
+    while( az[i] ){
+      strPrintf(&sql, "%sA.%s IS NOT B.%s%s\n",
+                zSep, az[i], az[i], i==n2-1 ? ")" : "");
+      zSep = "        OR ";
+      i++;
+    }
+    strPrintf(&sql, " UNION ALL\n");
+  }
+  zSep = "SELECT ";
+  for(i=0; i<nPk; i++){
+    strPrintf(&sql, "%sA.%s", zSep, az[i]);
+    zSep = ", ";
+  }
+  strPrintf(&sql, ", 2%s -- deleted row\n", nPk==n ? "" : ",");
+  while( az[i] ){
+    strPrintf(&sql, "       NULL, NULL%s\n", i==n2-1 ? "" : ",");
+    i++;
+  }
+  strPrintf(&sql, "  FROM main.%s A\n", zId);
+  strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM aux.%s B\n", zId);
+  zSep =          "                   WHERE";
+  for(i=0; i<nPk; i++){
+    strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
+    zSep = " AND";
+  }
+  strPrintf(&sql, ")\n");
+  zSep = " UNION ALL\nSELECT ";
+  for(i=0; i<nPk; i++){
+    strPrintf(&sql, "%sB.%s", zSep, az[i]);
+    zSep = ", ";
+  }
+  strPrintf(&sql, ", 3%s -- inserted row\n", nPk==n ? "" : ",");
+  while( az2[i] ){
+    strPrintf(&sql, "       1, B.%s%s\n", az[i], i==n2-1 ? "" : ",");
+    i++;
+  }
+  strPrintf(&sql, "  FROM aux.%s B\n", zId);
+  strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM main.%s A\n", zId);
+  zSep =          "                   WHERE";
+  for(i=0; i<nPk; i++){
+    strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
+    zSep = " AND";
+  }
+  strPrintf(&sql, ")\n ORDER BY");
+  zSep = " ";
+  for(i=1; i<=nPk; i++){
+    strPrintf(&sql, "%s%d", zSep, i);
+    zSep = ", ";
+  }
+  strPrintf(&sql, ";\n");
+
+  if( g.fDebug & DEBUG_DIFF_SQL ){ 
+    printf("SQL for %s:\n%s\n", zId, sql.z);
+    goto end_diff_one_table;
+  }
+
+  /* Drop indexes that are missing in the destination */
+  pStmt = db_prepare(
+    "SELECT name FROM main.sqlite_master"
+    " WHERE type='index' AND tbl_name=%Q"
+    "   AND sql IS NOT NULL"
+    "   AND sql NOT IN (SELECT sql FROM aux.sqlite_master"
+    "                    WHERE type='index' AND tbl_name=%Q"
+    "                      AND sql IS NOT NULL)",
+    zTab, zTab);
+  while( SQLITE_ROW==sqlite3_step(pStmt) ){
+    char *z = safeId((const char*)sqlite3_column_text(pStmt,0));
+    printf("DROP INDEX %s;\n", z);
+    sqlite3_free(z);
+  }
+  sqlite3_finalize(pStmt);
+
+  /* Run the query and output differences */
+  if( !g.bSchemaOnly ){
+    pStmt = db_prepare(sql.z);
+    while( SQLITE_ROW==sqlite3_step(pStmt) ){
+      int iType = sqlite3_column_int(pStmt, nPk);
+      if( iType==1 || iType==2 ){
+        if( iType==1 ){       /* Change the content of a row */
+          printf("UPDATE %s", zId);
+          zSep = " SET";
+          for(i=nPk+1; i<nQ; i+=2){
+            if( sqlite3_column_int(pStmt,i)==0 ) continue;
+            printf("%s %s=", zSep, az2[(i+nPk-1)/2]);
+            zSep = ",";
+            printQuoted(sqlite3_column_value(pStmt,i+1));
+          }
+        }else{                /* Delete a row */
+          printf("DELETE FROM %s", zId);
+        }
+        zSep = " WHERE";
+        for(i=0; i<nPk; i++){
+          printf("%s %s=", zSep, az2[i]);
+          printQuoted(sqlite3_column_value(pStmt,i));
+          zSep = ",";
+        }
+        printf(";\n");
+      }else{                  /* Insert a row */
+        printf("INSERT INTO %s(%s", zId, az2[0]);
+        for(i=1; az2[i]; i++) printf(",%s", az2[i]);
+        printf(") VALUES");
+        zSep = "(";
+        for(i=0; i<nPk2; i++){
+          printf("%s", zSep);
+          zSep = ",";
+          printQuoted(sqlite3_column_value(pStmt,i));
+        }
+        for(i=nPk2+2; i<nQ; i+=2){
+          printf(",");
+          printQuoted(sqlite3_column_value(pStmt,i));
+        }
+        printf(");\n");
+      }
+    }
+    sqlite3_finalize(pStmt);
+  } /* endif !g.bSchemaOnly */
+
+  /* Create indexes that are missing in the source */
+  pStmt = db_prepare(
+    "SELECT sql FROM aux.sqlite_master"
+    " WHERE type='index' AND tbl_name=%Q"
+    "   AND sql IS NOT NULL"
+    "   AND sql NOT IN (SELECT sql FROM main.sqlite_master"
+    "                    WHERE type='index' AND tbl_name=%Q"
+    "                      AND sql IS NOT NULL)",
+    zTab, zTab);
+  while( SQLITE_ROW==sqlite3_step(pStmt) ){
+    printf("%s;\n", sqlite3_column_text(pStmt,0));
+  }
+  sqlite3_finalize(pStmt);
+
+end_diff_one_table:
+  strFree(&sql);
+  sqlite3_free(zId);
+  namelistFree(az);
+  namelistFree(az2);
+  return;
+}
+
+/*
+** Print sketchy documentation for this utility program
+*/
+static void showHelp(void){
+  printf("Usage: %s [options] DB1 DB2\n", g.zArgv0);
+  printf(
+"Output SQL text that would transform DB1 into DB2.\n"
+"Options:\n"
+"  --primarykey          Use schema-defined PRIMARY KEYs\n"
+"  --schema              Show only differences in the schema\n"
+"  --table TAB           Show only differences in table TAB\n"
+  );
+}
+
+int main(int argc, char **argv){
+  const char *zDb1 = 0;
+  const char *zDb2 = 0;
+  int i;
+  int rc;
+  char *zErrMsg = 0;
+  char *zSql;
+  sqlite3_stmt *pStmt;
+  char *zTab = 0;
+
+  g.zArgv0 = argv[0];
+  for(i=1; i<argc; i++){
+    const char *z = argv[i];
+    if( z[0]=='-' ){
+      z++;
+      if( z[0]=='-' ) z++;
+      if( strcmp(z,"debug")==0 ){
+        g.fDebug = strtol(argv[++i], 0, 0);
+      }else
+      if( strcmp(z,"help")==0 ){
+        showHelp();
+        return 0;
+      }else
+      if( strcmp(z,"primarykey")==0 ){
+        g.bSchemaPK = 1;
+      }else
+      if( strcmp(z,"schema")==0 ){
+        g.bSchemaOnly = 1;
+      }else
+      if( strcmp(z,"table")==0 ){
+        zTab = argv[++i];
+      }else
+      {
+        cmdlineError("unknown option: %s", argv[i]);
+      }
+    }else if( zDb1==0 ){
+      zDb1 = argv[i];
+    }else if( zDb2==0 ){
+      zDb2 = argv[i];
+    }else{
+      cmdlineError("unknown argument: %s", argv[i]);
+    }
+  }
+  if( zDb2==0 ){
+    cmdlineError("two database arguments required");
+  }
+  rc = sqlite3_open(zDb1, &g.db);
+  if( rc ){
+    cmdlineError("cannot open database file \"%s\"", zDb1);
+  }
+  rc = sqlite3_exec(g.db, "SELECT * FROM sqlite_master", 0, 0, &zErrMsg);
+  if( rc || zErrMsg ){
+    cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb1);
+  }
+  zSql = sqlite3_mprintf("ATTACH %Q as aux;", zDb2);
+  rc = sqlite3_exec(g.db, zSql, 0, 0, &zErrMsg);
+  if( rc || zErrMsg ){
+    cmdlineError("cannot attach database \"%s\"", zDb2);
+  }
+  rc = sqlite3_exec(g.db, "SELECT * FROM aux.sqlite_master", 0, 0, &zErrMsg);
+  if( rc || zErrMsg ){
+    cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb2);
+  }
+
+  if( zTab ){
+    diff_one_table(zTab);
+  }else{
+    /* Handle tables one by one */
+    pStmt = db_prepare(
+      "SELECT name FROM main.sqlite_master\n"
+      " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
+      " UNION\n"
+      "SELECT name FROM aux.sqlite_master\n"
+      " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
+      " ORDER BY name"
+    );
+    while( SQLITE_ROW==sqlite3_step(pStmt) ){
+      diff_one_table((const char*)sqlite3_column_text(pStmt, 0));
+    }
+    sqlite3_finalize(pStmt);
+  }
+
+  /* TBD: Handle trigger differences */
+  /* TBD: Handle view differences */
+  sqlite3_close(g.db);
+  return 0;
+}