Merge in all the latest updates and enhancements from trunk.

FossilOrigin-Name: 67587a3348b84424b2ab1f2df1ea923a5168e2e4

29 files changed, 537 insertions, 193 deletions

diff --git a/configure b/configure
index f017124a8..a7281f089 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.62 for sqlite 3.7.16.2.
+# Generated by GNU Autoconf 2.62 for sqlite 3.8.0.
 #
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
 # 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
@@ -743,8 +743,8 @@ SHELL=${CONFIG_SHELL-/bin/sh}
 # Identity of this package.
 PACKAGE_NAME='sqlite'
 PACKAGE_TARNAME='sqlite'
-PACKAGE_VERSION='3.7.16.2'
-PACKAGE_STRING='sqlite 3.7.16.2'
+PACKAGE_VERSION='3.8.0'
+PACKAGE_STRING='sqlite 3.8.0'
 PACKAGE_BUGREPORT=''
 
 # Factoring default headers for most tests.
@@ -1484,7 +1484,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures sqlite 3.7.16.2 to adapt to many kinds of systems.
+\`configure' configures sqlite 3.8.0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1549,7 +1549,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of sqlite 3.7.16.2:";;
+     short | recursive ) echo "Configuration of sqlite 3.8.0:";;
    esac
   cat <<\_ACEOF
 
@@ -1665,7 +1665,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-sqlite configure 3.7.16.2
+sqlite configure 3.8.0
 generated by GNU Autoconf 2.62
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1679,7 +1679,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by sqlite $as_me 3.7.16.2, which was
+It was created by sqlite $as_me 3.8.0, which was
 generated by GNU Autoconf 2.62.  Invocation command line was
 
   $ $0 $@
@@ -14032,7 +14032,7 @@ exec 6>&1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by sqlite $as_me 3.7.16.2, which was
+This file was extended by sqlite $as_me 3.8.0, which was
 generated by GNU Autoconf 2.62.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -14085,7 +14085,7 @@ Report bugs to <bug-autoconf@gnu.org>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_version="\\
-sqlite config.status 3.7.16.2
+sqlite config.status 3.8.0
 configured by $0, generated by GNU Autoconf 2.62,
   with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 
@@ -14518,8 +14518,7 @@ $debug ||
 if test -n "$CONFIG_FILES"; then
 
 
-ac_cr='
-'
+ac_cr='
'
 ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
 if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
   ac_cs_awk_cr='\\r'
@@ -15754,3 +15753,4 @@ if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
   { $as_echo "$as_me:$LINENO: WARNING: Unrecognized options: $ac_unrecognized_opts" >&5
 $as_echo "$as_me: WARNING: Unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
+
diff --git a/manifest b/manifest
index f65f205e5..48fcb7f92 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Merge\sin\sthe\slatest\schanges\sfrom\strunk.
-D 2013-08-06T14:52:27.425
+C Merge\sin\sall\sthe\slatest\supdates\sand\senhancements\sfrom\strunk.
+D 2013-08-19T12:49:06.766
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in aff38bc64c582dd147f18739532198372587b0f0
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -38,7 +38,7 @@ F autoconf/tea/win/rules.vc c511f222b80064096b705dbeb97060ee1d6b6d63
 F config.guess 226d9a188c6196f3033ffc651cbc9dcee1a42977
 F config.h.in 0921066a13130082764ab4ab6456f7b5bebe56de
 F config.sub 9ebe4c3b3dab6431ece34f16828b594fb420da55
-F configure 22aa4520a498ef553e9386921913e498c3c45b56 x
+F configure 27e9279a219b652bd1c53439353a5e5be70214b2 x
 F configure.ac 81c43d151d0b0e406be056394cc9ff4cb3fd0444
 F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad
 F doc/lemon.html 334dbf6621b8fb8790297ec1abf3cfa4621709d1
@@ -171,21 +171,21 @@ F sqlite3.1 6be1ad09113570e1fc8dcaff84c9b0b337db5ffc
 F sqlite3.pc.in ae6f59a76e862f5c561eb32a380228a02afc3cad
 F src/alter.c f8db986c03eb0bfb221523fc9bbb9d0b70de3168
 F src/analyze.c a33fcb0b3a399d966951feb9f32115106b3ecc2e
-F src/attach.c 1816f5a9eea8d2010fc2b22b44f0f63eb3a62704
+F src/attach.c 5df737912f668fd160ec1d560755f85fdccbe5b7
 F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
 F src/backup.c 43b348822db3e4cef48b2ae5a445fbeb6c73a165
 F src/bitvec.c 19a4ba637bd85f8f63fc8c9bae5ade9fb05ec1cb
 F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
-F src/btree.c 3f7bbfd72efb1cbf6a49515c376a031767ec930a
-F src/btree.h 6fa8a3ff2483d0bb64a9f0105a8cedeac9e00cca
+F src/btree.c 9b985e4f334a1b3df5733e2ac2de1de9bdd41be7
+F src/btree.h bfe0e8c5759b4ec77b0d18390064a6ef3cdffaaf
 F src/btreeInt.h eecc84f02375b2bb7a44abbcbbe3747dde73edb2
-F src/build.c cee4724668ebc09bb482c1be30f96e0ae2474f9b
+F src/build.c f99a715ff9290996b579d5e1ec8e94239dc9ae5e
 F src/callback.c d7e46f40c3cf53c43550b7da7a1d0479910b62cc
 F src/complete.c dc1d136c0feee03c2f7550bafc0d29075e36deac
 F src/ctime.c 4262c227bc91cecc61ae37ed3a40f08069cfa267
 F src/date.c 067a81c9942c497aafd2c260e13add8a7d0c7dd4
 F src/delete.c 30ed4bc76a1a32c55bf17ac1528c5867aa5502c0
-F src/expr.c 7e55edefb8bd0b35b382ce9226c58472cd63a443
+F src/expr.c 0bbb44462a19169189b2709fbbd800950521b5ae
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
 F src/fkey.c 914a6bbd987d857c41ac9d244efa6641f36faadb
 F src/func.c 5c50c1ea31fd864b0fe921fe1a8d4c55acd609ef
@@ -198,13 +198,13 @@ F src/journal.c b4124532212b6952f42eb2c12fa3c25701d8ba8d
 F src/legacy.c 0df0b1550b9cc1f58229644735e317ac89131f12
 F src/lempar.c cdf0a000315332fc9b50b62f3b5e22e080a0952b
 F src/loadext.c 867c7b330b740c6c917af9956b13b81d0a048303
-F src/main.c e3ce4cb4a9d0634ce74b9711bd800405ae470954
+F src/main.c 525985af588234b3d01b48fe856b83d9bdc2d912
 F src/malloc.c fe085aa851b666b7c375c1ff957643dc20a04bf6
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c 437c7c4af964895d4650f29881df63535caaa1fa
 F src/mem2.c e307323e86b5da1853d7111b68fd6b84ad6f09cf
 F src/mem3.c 61c9d47b792908c532ca3a62b999cf21795c6534
-F src/mem5.c c2c63b7067570b00bf33d751c39af24182316f7f
+F src/mem5.c 0025308a93838022bd5696cf9627ff4e40b19918
 F src/memjournal.c 0683aac6cab6ec2b5374c0db37c0deb2436a3785
 F src/mutex.c d3b66a569368015e0fcb1ac15f81c119f504d3bc
 F src/mutex.h 5bc526e19dccc412b7ff04642f6fdad3fdfdabea
@@ -217,28 +217,28 @@ F src/os.h 4a46270a64e9193af4a0aaa3bc2c66dc07c29b3f
 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
 F src/os_unix.c 9eafa5458cf2ff684ddccff82c9bb113c7cad847
 F src/os_win.c 1d84f2079d9b91f91a4b5dbfa5e08f1b1a0ed0ff
-F src/pager.c 5d2f7475260a8588f9c441bb309d2b7eaa7ded3b
-F src/pager.h 5cb78b8e1adfd5451e600be7719f5a99d87ac3b1
+F src/pager.c 7c999137cb940133f7fc7609ccfa66f17eec4ab4
+F src/pager.h 66e42d6942a445d4c25651733ab2079dbebc7ca9
 F src/parse.y 27c6b4138497d6f8360ba7847da6ed48033f957f
 F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
 F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
 F src/pcache1.c d23d07716de96c7c0c2503ec5051a4384c3fb938
-F src/pragma.c 590c75750d93ec5a1f903e4bb0dc6d2a0845bf8b
+F src/pragma.c 1d96ba749253b49bc229c6294f9c2e5ef3dca85c
 F src/prepare.c fa6988589f39af8504a61731614cd4f6ae71554f
 F src/printf.c 41c49dac366a3a411190001a8ab495fa8887974e
 F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
-F src/resolve.c 17e670996729ac41aadf6a31f57b4e6f29b3d819
+F src/resolve.c 9d53899cc6e1f4ec0b4632d07e97d57827bf63b9
 F src/rowset.c 64655f1a627c9c212d9ab497899e7424a34222e0
 F src/select.c 8b148eb851f384412aea57091659d14b369918ca
-F src/shell.c 927e17b37b63b24461e372d982138fb22c4df321
-F src/sqlite.h.in 9dbc04c103f297d2bd26c7e323f0bdb9aaf0dc8a
+F src/shell.c 909f6c4a52c8e0265ce0048e2b3cbadda1bd6051
+F src/sqlite.h.in dcca940021f8f6643630fb7711bfd4e3fa002566
 F src/sqlite3.rc fea433eb0a59f4c9393c8e6d76a6e2596b1fe0c0
 F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
-F src/sqliteInt.h 1f9abddff71bbce4f51d275d3dc5262ceae7aa61
+F src/sqliteInt.h a24a7f54dd59e8f59d67f7ab0682b5c22f554855
 F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
 F src/status.c 7ac05a5c7017d0b9f0b4bcd701228b784f987158
 F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
-F src/tclsqlite.c e0eaf3a78eca2ef650abb67b6571cc86abcb5f87
+F src/tclsqlite.c a25933b085bde305a59b43e52f5624871db46a1e
 F src/test1.c 870fc648a48cb6d6808393174f7ebe82b8c840fa
 F src/test2.c 7355101c085304b90024f2261e056cdff13c6c35
 F src/test3.c 1c0e5d6f080b8e33c1ce8b3078e7013fdbcd560c
@@ -249,23 +249,23 @@ F src/test7.c 126b886b53f0358b92aba9b81d3fcbfbe9a93cd6
 F src/test8.c 7ee77ea522ae34aa691dfe407139dec80d4fc039
 F src/test9.c bea1e8cf52aa93695487badedd6e1886c321ea60
 F src/test_async.c 21e11293a2f72080eda70e1124e9102044531cd8
-F src/test_autoext.c 32cff3d01cdd3202486e623c3f8103ed04cb57fa
+F src/test_autoext.c dea8a01a7153b9adc97bd26161e4226329546e12
 F src/test_backup.c 3875e899222b651e18b662f86e0e50daa946344e
 F src/test_btree.c 5b89601dcb42a33ba8b820a6b763cc9cb48bac16
 F src/test_config.c 6b614c603cb4db1c996f1b192ca0a46ef0d152cd
-F src/test_demovfs.c 20a4975127993f4959890016ae9ce5535a880094
+F src/test_demovfs.c 69b2085076654ebc18014cbc6386f04409c959a9
 F src/test_devsym.c e7498904e72ba7491d142d5c83b476c4e76993bc
-F src/test_fs.c 8f786bfd0ad48030cf2a06fb1f050e9c60a150d7
+F src/test_fs.c ced436e3d4b8e4681328409b8081051ce614e28f
 F src/test_func.c 3a8dd37c08ab43b76d38eea2836e34a3897bf170
 F src/test_hexio.c abfdecb6fa58c354623978efceb088ca18e379cd
 F src/test_init.c 3cbad7ce525aec925f8fda2192d576d47f0d478a
 F src/test_intarray.c 87847c71c3c36889c0bcc9c4baf9d31881665d61
-F src/test_intarray.h b999bb18d090b8d9d9c49d36ec37ef8f341fe169
+F src/test_intarray.h 2ece66438cfd177b78d1bfda7a4180cd3a10844d
 F src/test_journal.c f5c0a05b7b3d5930db769b5ee6c3766dc2221a64
 F src/test_loadext.c df586c27176e3c2cb2e099c78da67bf14379a56e
 F src/test_malloc.c a105801222c0514f8befa2a1712a95505cce099a
 F src/test_multiplex.c 5d691eeb6cb6aa7888da28eba5e62a9a857d3c0f
-F src/test_multiplex.h 9b63b95f07acedee425fdfe49a47197c9bf5f9d8
+F src/test_multiplex.h 110a8c4d356e0aa464ca8730375608a9a0b61ae1
 F src/test_mutex.c 293042d623ebba969160f471a82aa1551626454f
 F src/test_onefile.c 0396f220561f3b4eedc450cef26d40c593c69a25
 F src/test_osinst.c 90a845c8183013d80eccb1f29e8805608516edba
@@ -290,7 +290,7 @@ F src/update.c e3668141dd9701023681239265e001388f182236
 F src/utf.c 8d819e2e5104a430fc2005f018db14347c95a38f
 F src/util.c f566b5138099a2df8533b190d0dcc74b7dfbe0c9
 F src/vacuum.c d9c5759f4c5a438bb43c2086f72c5d2edabc36c8
-F src/vdbe.c 1d95ab3d4aae198744c1c14170b2466b58eb8970
+F src/vdbe.c fab5d86a09f735db4bfd53d977465fa82cd5c213
 F src/vdbe.h 7aa3ab6210a68471c8490dedfc9aa4ef5684b9a0
 F src/vdbeInt.h cc1974b94efa98ecaec6fa14a2584d7c1e82eadf
 F src/vdbeapi.c c8c433043d14b5e00e2ed6f7e44543bcc92d1594
@@ -303,7 +303,7 @@ F src/vtab.c 2e8b489db47e20ae36cd247932dc671c9ded0624
 F src/wal.c 7dc3966ef98b74422267e7e6e46e07ff6c6eb1b4
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
 F src/walker.c 4fa43583d0a84b48f93b1e88f11adf2065be4e73
-F src/where.c 67245bb73fd9cc04ee7796a0f358d4910c45cfe9
+F src/where.c 67a823e7816464bc1de998841e87a2a3e4c20a94
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/aggnested.test 45c0201e28045ad38a530b5a144b73cd4aa2cfd6
@@ -603,7 +603,7 @@ F test/index2.test ee83c6b5e3173a3d7137140d945d9a5d4fdfb9d6
 F test/index3.test 423a25c789fc8cc51aaf2a4370bbdde2d9e9eed7
 F test/index4.test 2983216eb8c86ee62d9ed7cb206b5cc3331c0026
 F test/index5.test fc07c14193c0430814e7a08b5da46888ee795c33
-F test/index6.test 0005b3093012c6d0f20cc54d9057210221216143
+F test/index6.test f53a788b813eb6937346867bae9e587c434dd9a1
 F test/indexedby.test 0e959308707c808515c3a51363f7a9835027108c
 F test/indexfault.test 31d4ab9a7d2f6e9616933eb079722362a883eb1d
 F test/init.test 15c823093fdabbf7b531fe22cf037134d09587a7
@@ -729,7 +729,7 @@ F test/pcache2.test a83efe2dec0d392f814bfc998def1d1833942025
 F test/percentile.test b98fc868d71eb5619d42a1702e9ab91718cbed54
 F test/permutations.test 742b8005bb3c782797a20beccdbe213ef52531fb
 F test/pragma.test 5e7de6c32a5d764f09437d2025f07e4917b9e178
-F test/pragma2.test 3a55f82b954242c642f8342b17dffc8b47472947
+F test/pragma2.test 76e4a54cd4677966e4e75f8a7fe86ccbc250de2a
 F test/printf.test ec9870c4dce8686a37818e0bf1aba6e6a1863552
 F test/progress.test 552dc1edc37333a8d3098b8c26a2b7f06f5799d7
 F test/ptrchng.test ef1aa72d6cf35a2bbd0869a649b744e9d84977fc
@@ -746,7 +746,7 @@ F test/regexp1.test 497ea812f264d12b6198d6e50a76be4a1973a9d8
 F test/reindex.test 44edd3966b474468b823d481eafef0c305022254
 F test/releasetest.mk 2eced2f9ae701fd0a29e714a241760503ccba25a
 F test/releasetest.tcl 06d289d8255794073a58d2850742f627924545ce
-F test/resolver01.test d1b487fc567bdb70b5dd09ccaaa877ddc61a233e
+F test/resolver01.test 33abf37ff8335e6bf98f2b45a0af3e06996ccd9a
 F test/rollback.test a1b4784b864331eae8b2a98c189efa2a8b11ff07
 F test/rowhash.test 0bc1d31415e4575d10cacf31e1a66b5cc0f8be81
 F test/rowid.test f777404492adb0e00868fd706a3721328fd3af48
@@ -920,7 +920,7 @@ F test/tkt2686.test 6ee01c9b9e9c48f6d3a1fdd553b1cc4258f903d6
 F test/tkt2767.test 569000d842678f9cf2db7e0d1b27cbc9011381b0
 F test/tkt2817.test f31839e01f4243cff7399ef654d3af3558cb8d8d
 F test/tkt2820.test 39940276b3436d125deb7d8ebeee053e4cf13213
-F test/tkt2822.test c3589494fba643e039bcf0bfde7554ff6028406d
+F test/tkt2822.test f391776423a7c0d0949edfce375708bfb0f3141e
 F test/tkt2832.test a9b0b74a02dca166a04d9e37739c414b10929caa
 F test/tkt2854.test e432965db29e27e16f539b2ba7f502eb2ccc49af
 F test/tkt2920.test a8737380e4ae6424e00c0273dc12775704efbebf
@@ -1119,7 +1119,7 @@ F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P 7e1acb390770d1bd189fac7a3a7f96106f96e3a4 5dcc2d91bd343cd0fac79d3c8f079a5ce534cdf7
-R 16c019af84c40424fdcd3228006de852
+P 69d5bed017bda3e184857febcc8b6f6bed6ad228 a0d9ca4f07f1dc3a189864f8ed9cdb0b1d791b1a
+R 144b203c75da112b948140b14b84bcaf
 U drh
-Z 236e21ad4140ab8f1ddcd5409f261d54
+Z e4751f746fc0244a4adaef8846371a84
diff --git a/manifest.uuid b/manifest.uuid
index 4136a8e12..965f20354 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-69d5bed017bda3e184857febcc8b6f6bed6ad228
\ No newline at end of file
+67587a3348b84424b2ab1f2df1ea923a5168e2e4
\ No newline at end of file
diff --git a/src/attach.c b/src/attach.c
index b8e12199b..87c15ae3d 100644
--- a/src/attach.c
+++ b/src/attach.c
@@ -158,6 +158,7 @@ static void attachFunc(
     sqlite3PagerLockingMode(pPager, db->dfltLockMode);
     sqlite3BtreeSecureDelete(aNew->pBt,
                              sqlite3BtreeSecureDelete(db->aDb[0].pBt,-1) );
+    sqlite3BtreeSetPagerFlags(aNew->pBt, 3 | (db->flags & PAGER_FLAGS_MASK));
   }
   aNew->safety_level = 3;
   aNew->zName = sqlite3DbStrDup(db, zName);
diff --git a/src/btree.c b/src/btree.c
index 9b7837879..ac0a8cf2c 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -2165,17 +2165,14 @@ int sqlite3BtreeSetMmapLimit(Btree *p, sqlite3_int64 szMmap){
 ** probability of damage to near zero but with a write performance reduction.
 */
 #ifndef SQLITE_OMIT_PAGER_PRAGMAS
-int sqlite3BtreeSetSafetyLevel(
+int sqlite3BtreeSetPagerFlags(
   Btree *p,              /* The btree to set the safety level on */
-  int level,             /* PRAGMA synchronous.  1=OFF, 2=NORMAL, 3=FULL */
-  int fullSync,          /* PRAGMA fullfsync. */
-  int ckptFullSync       /* PRAGMA checkpoint_fullfync */
+  unsigned pgFlags       /* Various PAGER_* flags */
 ){
   BtShared *pBt = p->pBt;
   assert( sqlite3_mutex_held(p->db->mutex) );
-  assert( level>=1 && level<=3 );
   sqlite3BtreeEnter(p);
-  sqlite3PagerSetSafetyLevel(pBt->pPager, level, fullSync, ckptFullSync);
+  sqlite3PagerSetFlags(pBt->pPager, pgFlags);
   sqlite3BtreeLeave(p);
   return SQLITE_OK;
 }
diff --git a/src/btree.h b/src/btree.h
index ace0f8cd2..33b3ed1f0 100644
--- a/src/btree.h
+++ b/src/btree.h
@@ -64,7 +64,7 @@ int sqlite3BtreeOpen(
 int sqlite3BtreeClose(Btree*);
 int sqlite3BtreeSetCacheSize(Btree*,int);
 int sqlite3BtreeSetMmapLimit(Btree*,sqlite3_int64);
-int sqlite3BtreeSetSafetyLevel(Btree*,int,int,int);
+int sqlite3BtreeSetPagerFlags(Btree*,unsigned);
 int sqlite3BtreeSyncDisabled(Btree*);
 int sqlite3BtreeSetPageSize(Btree *p, int nPagesize, int nReserve, int eFix);
 int sqlite3BtreeGetPageSize(Btree*);
diff --git a/src/build.c b/src/build.c
index f5ea5be4b..023901738 100644
--- a/src/build.c
+++ b/src/build.c
@@ -2866,7 +2866,7 @@ Index *sqlite3CreateIndex(
     ** the zStmt variable
     */
     if( pStart ){
-      int n = (pParse->sLastToken.z - pName->z) + pParse->sLastToken.n;
+      int n = (int)(pParse->sLastToken.z - pName->z) + pParse->sLastToken.n;
       if( pName->z[n-1]==';' ) n--;
       /* A named index with an explicit CREATE INDEX statement */
       zStmt = sqlite3MPrintf(db, "CREATE%s INDEX %.*s",
diff --git a/src/expr.c b/src/expr.c
index 3857d5d84..5c5297c18 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -1734,15 +1734,17 @@ int sqlite3CodeSubselect(
         dest.affSdst = (u8)affinity;
         assert( (pExpr->iTable&0x0000FFFF)==pExpr->iTable );
         pExpr->x.pSelect->iLimit = 0;
+        testcase( pKeyInfo==0 ); /* Caused by OOM in sqlite3KeyInfoAlloc() */
         if( sqlite3Select(pParse, pExpr->x.pSelect, &dest) ){
           sqlite3DbFree(pParse->db, pKeyInfo);
           return 0;
         }
         pEList = pExpr->x.pSelect->pEList;
-        if( pKeyInfo && ALWAYS(pEList!=0 && pEList->nExpr>0) ){ 
-          pKeyInfo->aColl[0] = sqlite3BinaryCompareCollSeq(pParse, pExpr->pLeft,
-              pEList->a[0].pExpr);
-        }
+        assert( pKeyInfo!=0 ); /* OOM will cause exit after sqlite3Select() */
+        assert( pEList!=0 );
+        assert( pEList->nExpr>0 );
+        pKeyInfo->aColl[0] = sqlite3BinaryCompareCollSeq(pParse, pExpr->pLeft,
+                                                         pEList->a[0].pExpr);
       }else if( ALWAYS(pExpr->x.pList!=0) ){
         /* Case 2:     expr IN (exprlist)
         **
diff --git a/src/main.c b/src/main.c
index c4ba03849..1f01853c6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -117,6 +117,9 @@ char *sqlite3_data_directory = 0;
 int sqlite3_initialize(void){
   MUTEX_LOGIC( sqlite3_mutex *pMaster; )       /* The main static mutex */
   int rc;                                      /* Result code */
+#ifdef SQLITE_EXTRA_INIT
+  int bRunExtraInit = 0;                       /* Extra initialization needed */
+#endif
 
 #ifdef SQLITE_OMIT_WSD
   rc = sqlite3_wsd_init(4096, 24);
@@ -214,6 +217,9 @@ int sqlite3_initialize(void){
       sqlite3PCacheBufferSetup( sqlite3GlobalConfig.pPage, 
           sqlite3GlobalConfig.szPage, sqlite3GlobalConfig.nPage);
       sqlite3GlobalConfig.isInit = 1;
+#ifdef SQLITE_EXTRA_INIT
+      bRunExtraInit = 1;
+#endif
     }
     sqlite3GlobalConfig.inProgress = 0;
   }
@@ -254,7 +260,7 @@ int sqlite3_initialize(void){
   ** compile-time option.
   */
 #ifdef SQLITE_EXTRA_INIT
-  if( rc==SQLITE_OK && sqlite3GlobalConfig.isInit ){
+  if( bRunExtraInit ){
     int SQLITE_EXTRA_INIT(const char*);
     rc = SQLITE_EXTRA_INIT(0);
   }
@@ -442,8 +448,8 @@ int sqlite3_config(int op, ...){
         memset(&sqlite3GlobalConfig.m, 0, sizeof(sqlite3GlobalConfig.m));
       }else{
         /* The heap pointer is not NULL, then install one of the
-        ** mem5.c/mem3.c methods. If neither ENABLE_MEMSYS3 nor
-        ** ENABLE_MEMSYS5 is defined, return an error.
+        ** mem5.c/mem3.c methods.  The enclosing #if guarantees at
+        ** least one of these methods is currently enabled.
         */
 #ifdef SQLITE_ENABLE_MEMSYS3
         sqlite3GlobalConfig.m = *sqlite3MemGetMemsys3();
@@ -462,7 +468,7 @@ int sqlite3_config(int op, ...){
       break;
     }
     
-    /* Record a pointer to the logger funcction and its first argument.
+    /* Record a pointer to the logger function and its first argument.
     ** The default is NULL.  Logging is disabled if the function pointer is
     ** NULL.
     */
@@ -2199,20 +2205,20 @@ int sqlite3ParseUri(
     zFile = sqlite3_malloc(nByte);
     if( !zFile ) return SQLITE_NOMEM;
 
+    iIn = 5;
+#ifndef SQLITE_ALLOW_URI_AUTHORITY
     /* Discard the scheme and authority segments of the URI. */
     if( zUri[5]=='/' && zUri[6]=='/' ){
       iIn = 7;
       while( zUri[iIn] && zUri[iIn]!='/' ) iIn++;
-
       if( iIn!=7 && (iIn!=16 || memcmp("localhost", &zUri[7], 9)) ){
         *pzErrMsg = sqlite3_mprintf("invalid uri authority: %.*s", 
             iIn-7, &zUri[7]);
         rc = SQLITE_ERROR;
         goto parse_uri_out;
       }
-    }else{
-      iIn = 5;
     }
+#endif
 
     /* Copy the filename and any query parameters into the zFile buffer. 
     ** Decode %HH escape codes along the way. 
@@ -2476,7 +2482,7 @@ static int openDatabase(
   db->nextAutovac = -1;
   db->szMmap = sqlite3GlobalConfig.szMmap;
   db->nextPagesize = 0;
-  db->flags |= SQLITE_ShortColNames | SQLITE_EnableTrigger
+  db->flags |= SQLITE_ShortColNames | SQLITE_EnableTrigger | SQLITE_CacheSpill
 #if !defined(SQLITE_DEFAULT_AUTOMATIC_INDEX) || SQLITE_DEFAULT_AUTOMATIC_INDEX
                  | SQLITE_AutoIndex
 #endif
diff --git a/src/mem5.c b/src/mem5.c
index 783cef617..5f99ebf43 100644
--- a/src/mem5.c
+++ b/src/mem5.c
@@ -130,13 +130,13 @@ static SQLITE_WSD struct Mem5Global {
 } mem5;
 
 /*
-** Access the static variable through a macro for SQLITE_OMIT_WSD
+** Access the static variable through a macro for SQLITE_OMIT_WSD.
 */
 #define mem5 GLOBAL(struct Mem5Global, mem5)
 
 /*
 ** Assuming mem5.zPool is divided up into an array of Mem5Link
-** structures, return a pointer to the idx-th such lik.
+** structures, return a pointer to the idx-th such link.
 */
 #define MEM5LINK(idx) ((Mem5Link *)(&mem5.zPool[(idx)*mem5.szAtom]))
 
@@ -232,7 +232,7 @@ static int memsys5UnlinkFirst(int iLogsize){
 ** Return a block of memory of at least nBytes in size.
 ** Return NULL if unable.  Return NULL if nBytes==0.
 **
-** The caller guarantees that nByte positive.
+** The caller guarantees that nByte is positive.
 **
 ** The caller has obtained a mutex prior to invoking this
 ** routine so there is never any chance that two or more
@@ -354,7 +354,7 @@ static void memsys5FreeUnsafe(void *pOld){
 }
 
 /*
-** Allocate nBytes of memory
+** Allocate nBytes of memory.
 */
 static void *memsys5Malloc(int nBytes){
   sqlite3_int64 *p = 0;
diff --git a/src/pager.c b/src/pager.c
index b20822896..77a7d86a0 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -454,6 +454,13 @@ struct PagerSavepoint {
 };
 
 /*
+** Bits of the Pager.doNotSpill flag.  See further description below.
+*/
+#define SPILLFLAG_OFF         0x01      /* Never spill cache.  Set via pragma */
+#define SPILLFLAG_ROLLBACK    0x02      /* Current rolling back, so do not spill */
+#define SPILLFLAG_NOSYNC      0x04      /* Spill is ok, but do not sync */
+
+/*
 ** A open page cache is an instance of struct Pager. A description of
 ** some of the more important member variables follows:
 **
@@ -519,19 +526,21 @@ struct PagerSavepoint {
 **   journal file from being successfully finalized, the setMaster flag
 **   is cleared anyway (and the pager will move to ERROR state).
 **
-** doNotSpill, doNotSyncSpill
+** doNotSpill
 **
-**   These two boolean variables control the behavior of cache-spills
-**   (calls made by the pcache module to the pagerStress() routine to
-**   write cached data to the file-system in order to free up memory).
+**   This variables control the behavior of cache-spills  (calls made by
+**   the pcache module to the pagerStress() routine to write cached data
+**   to the file-system in order to free up memory).
 **
-**   When doNotSpill is non-zero, writing to the database from pagerStress()
-**   is disabled altogether. This is done in a very obscure case that
+**   When bits SPILLFLAG_OFF or SPILLFLAG_ROLLBACK of doNotSpill are set,
+**   writing to the database from pagerStress() is disabled altogether.
+**   The SPILLFLAG_ROLLBACK case is done in a very obscure case that
 **   comes up during savepoint rollback that requires the pcache module
 **   to allocate a new page to prevent the journal file from being written
-**   while it is being traversed by code in pager_playback().
+**   while it is being traversed by code in pager_playback().  The SPILLFLAG_OFF
+**   case is a user preference.
 ** 
-**   If doNotSyncSpill is non-zero, writing to the database from pagerStress()
+**   If the SPILLFLAG_NOSYNC bit is set, writing to the database from pagerStress()
 **   is permitted, but syncing the journal file is not. This flag is set
 **   by sqlite3PagerWrite() when the file-system sector-size is larger than
 **   the database page-size in order to prevent a journal sync from happening 
@@ -635,7 +644,6 @@ struct Pager {
   u8 changeCountDone;         /* Set after incrementing the change-counter */
   u8 setMaster;               /* True if a m-j name has been written to jrnl */
   u8 doNotSpill;              /* Do not spill the cache when non-zero */
-  u8 doNotSyncSpill;          /* Do not do a spill that requires jrnl sync */
   u8 subjInMemory;            /* True to use in-memory sub-journals */
   Pgno dbSize;                /* Number of pages in the database */
   Pgno dbOrigSize;            /* dbSize before the current transaction */
@@ -2295,11 +2303,11 @@ static int pager_playback_one_page(
     ** requiring a journal-sync before it is written.
     */
     assert( isSavepnt );
-    assert( pPager->doNotSpill==0 );
-    pPager->doNotSpill++;
+    assert( (pPager->doNotSpill & SPILLFLAG_ROLLBACK)==0 );
+    pPager->doNotSpill |= SPILLFLAG_ROLLBACK;
     rc = sqlite3PagerAcquire(pPager, pgno, &pPg, 1);
-    assert( pPager->doNotSpill==1 );
-    pPager->doNotSpill--;
+    assert( (pPager->doNotSpill & SPILLFLAG_ROLLBACK)!=0 );
+    pPager->doNotSpill &= ~SPILLFLAG_ROLLBACK;
     if( rc!=SQLITE_OK ) return rc;
     pPg->flags &= ~PGHDR_NEED_READ;
     sqlite3PcacheMakeDirty(pPg);
@@ -3404,9 +3412,12 @@ void sqlite3PagerShrink(Pager *pPager){
 }
 
 /*
-** Adjust the robustness of the database to damage due to OS crashes
-** or power failures by changing the number of syncs()s when writing
-** the rollback journal.  There are three levels:
+** Adjust settings of the pager to those specified in the pgFlags parameter.
+**
+** The "level" in pgFlags & PAGER_SYNCHRONOUS_MASK sets the robustness
+** of the database to damage due to OS crashes or power failures by
+** changing the number of syncs()s when writing the journals.
+** There are three levels:
 **
 **    OFF       sqlite3OsSync() is never called.  This is the default
 **              for temporary and transient files.
@@ -3447,22 +3458,21 @@ void sqlite3PagerShrink(Pager *pPager){
 ** and FULL=3.
 */
 #ifndef SQLITE_OMIT_PAGER_PRAGMAS
-void sqlite3PagerSetSafetyLevel(
+void sqlite3PagerSetFlags(
   Pager *pPager,        /* The pager to set safety level for */
-  int level,            /* PRAGMA synchronous.  1=OFF, 2=NORMAL, 3=FULL */  
-  int bFullFsync,       /* PRAGMA fullfsync */
-  int bCkptFullFsync    /* PRAGMA checkpoint_fullfsync */
+  unsigned pgFlags      /* Various flags */
 ){
+  unsigned level = pgFlags & PAGER_SYNCHRONOUS_MASK;
   assert( level>=1 && level<=3 );
   pPager->noSync =  (level==1 || pPager->tempFile) ?1:0;
   pPager->fullSync = (level==3 && !pPager->tempFile) ?1:0;
   if( pPager->noSync ){
     pPager->syncFlags = 0;
     pPager->ckptSyncFlags = 0;
-  }else if( bFullFsync ){
+  }else if( pgFlags & PAGER_FULLFSYNC ){
     pPager->syncFlags = SQLITE_SYNC_FULL;
     pPager->ckptSyncFlags = SQLITE_SYNC_FULL;
-  }else if( bCkptFullFsync ){
+  }else if( pgFlags & PAGER_CKPT_FULLFSYNC ){
     pPager->syncFlags = SQLITE_SYNC_NORMAL;
     pPager->ckptSyncFlags = SQLITE_SYNC_FULL;
   }else{
@@ -3473,6 +3483,11 @@ void sqlite3PagerSetSafetyLevel(
   if( pPager->fullSync ){
     pPager->walSyncFlags |= WAL_SYNC_TRANSACTIONS;
   }
+  if( pgFlags & PAGER_CACHESPILL ){
+    pPager->doNotSpill &= ~SPILLFLAG_OFF;
+  }else{
+    pPager->doNotSpill |= SPILLFLAG_OFF;
+  }
 }
 #endif
 
@@ -4373,13 +4388,14 @@ static int pagerStress(void *p, PgHdr *pPg){
   assert( pPg->pPager==pPager );
   assert( pPg->flags&PGHDR_DIRTY );
 
-  /* The doNotSyncSpill flag is set during times when doing a sync of
+  /* The doNotSpill NOSYNC bit is set during times when doing a sync of
   ** journal (and adding a new header) is not allowed.  This occurs
   ** during calls to sqlite3PagerWrite() while trying to journal multiple
   ** pages belonging to the same sector.
   **
-  ** The doNotSpill flag inhibits all cache spilling regardless of whether
-  ** or not a sync is required.  This is set during a rollback.
+  ** The doNotSpill ROLLBACK and OFF bits inhibits all cache spilling
+  ** regardless of whether or not a sync is required.  This is set during
+  ** a rollback or by user request, respectively.
   **
   ** Spilling is also prohibited when in an error state since that could
   ** lead to database corruption.   In the current implementaton it 
@@ -4389,8 +4405,13 @@ static int pagerStress(void *p, PgHdr *pPg){
   ** test for the error state as a safeguard against future changes.
   */
   if( NEVER(pPager->errCode) ) return SQLITE_OK;
-  if( pPager->doNotSpill ) return SQLITE_OK;
-  if( pPager->doNotSyncSpill && (pPg->flags & PGHDR_NEED_SYNC)!=0 ){
+  testcase( pPager->doNotSpill & SPILLFLAG_ROLLBACK );
+  testcase( pPager->doNotSpill & SPILLFLAG_OFF );
+  testcase( pPager->doNotSpill & SPILLFLAG_NOSYNC );
+  if( pPager->doNotSpill
+   && ((pPager->doNotSpill & (SPILLFLAG_ROLLBACK|SPILLFLAG_OFF))!=0
+      || (pPg->flags & PGHDR_NEED_SYNC)!=0)
+  ){
     return SQLITE_OK;
   }
 
@@ -5744,13 +5765,13 @@ int sqlite3PagerWrite(DbPage *pDbPage){
     int ii;                   /* Loop counter */
     int needSync = 0;         /* True if any page has PGHDR_NEED_SYNC */
 
-    /* Set the doNotSyncSpill flag to 1. This is because we cannot allow
+    /* Set the doNotSpill NOSYNC bit to 1. This is because we cannot allow
     ** a journal header to be written between the pages journaled by
     ** this function.
     */
     assert( !MEMDB );
-    assert( pPager->doNotSyncSpill==0 );
-    pPager->doNotSyncSpill++;
+    assert( (pPager->doNotSpill & SPILLFLAG_NOSYNC)==0 );
+    pPager->doNotSpill |= SPILLFLAG_NOSYNC;
 
     /* This trick assumes that both the page-size and sector-size are
     ** an integer power of 2. It sets variable pg1 to the identifier
@@ -5809,8 +5830,8 @@ int sqlite3PagerWrite(DbPage *pDbPage){
       }
     }
 
-    assert( pPager->doNotSyncSpill==1 );
-    pPager->doNotSyncSpill--;
+    assert( (pPager->doNotSpill & SPILLFLAG_NOSYNC)!=0 );
+    pPager->doNotSpill &= ~SPILLFLAG_NOSYNC;
   }else{
     rc = pager_write(pDbPage);
   }
diff --git a/src/pager.h b/src/pager.h
index 6f659136e..5528be14e 100644
--- a/src/pager.h
+++ b/src/pager.h
@@ -85,6 +85,18 @@ typedef struct PgHdr DbPage;
 #define PAGER_ACQUIRE_READONLY      0x02  /* Read-only page is acceptable */
 
 /*
+** Flags for sqlite3PagerSetFlags()
+*/
+#define PAGER_SYNCHRONOUS_OFF       0x01  /* PRAGMA synchronous=OFF */
+#define PAGER_SYNCHRONOUS_NORMAL    0x02  /* PRAGMA synchronous=NORMAL */
+#define PAGER_SYNCHRONOUS_FULL      0x03  /* PRAGMA synchronous=FULL */
+#define PAGER_SYNCHRONOUS_MASK      0x03  /* Mask for three values above */
+#define PAGER_FULLFSYNC             0x04  /* PRAGMA fullfsync=ON */
+#define PAGER_CKPT_FULLFSYNC        0x08  /* PRAGMA checkpoint_fullfsync=ON */
+#define PAGER_CACHESPILL            0x10  /* PRAGMA cache_spill=ON */
+#define PAGER_FLAGS_MASK            0x1c  /* All above except SYNCHRONOUS */
+
+/*
 ** The remainder of this file contains the declarations of the functions
 ** that make up the Pager sub-system API. See source code comments for 
 ** a detailed description of each routine.
@@ -110,7 +122,7 @@ int sqlite3PagerMaxPageCount(Pager*, int);
 void sqlite3PagerSetCachesize(Pager*, int);
 void sqlite3PagerSetMmapLimit(Pager *, sqlite3_int64);
 void sqlite3PagerShrink(Pager*);
-void sqlite3PagerSetSafetyLevel(Pager*,int,int,int);
+void sqlite3PagerSetFlags(Pager*,unsigned);
 int sqlite3PagerLockingMode(Pager *, int);
 int sqlite3PagerSetJournalMode(Pager *, int);
 int sqlite3PagerGetJournalMode(Pager*);
diff --git a/src/pragma.c b/src/pragma.c
index f152220d4..f0f7b5b66 100644
--- a/src/pragma.c
+++ b/src/pragma.c
@@ -158,6 +158,34 @@ static void returnSingleInt(Parse *pParse, const char *zLabel, i64 value){
   sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
 }
 
+
+/*
+** Set the safety_level and pager flags for pager iDb.  Or if iDb<0
+** set these values for all pagers.
+*/
+#ifndef SQLITE_OMIT_PAGER_PRAGMAS
+static void setAllPagerFlags(sqlite3 *db){
+  if( db->autoCommit ){
+    Db *pDb = db->aDb;
+    int n = db->nDb;
+    assert( SQLITE_FullFSync==PAGER_FULLFSYNC );
+    assert( SQLITE_CkptFullFSync==PAGER_CKPT_FULLFSYNC );
+    assert( SQLITE_CacheSpill==PAGER_CACHESPILL );
+    assert( (PAGER_FULLFSYNC | PAGER_CKPT_FULLFSYNC | PAGER_CACHESPILL)
+             ==  PAGER_FLAGS_MASK );
+    assert( (pDb->safety_level & PAGER_SYNCHRONOUS_MASK)==pDb->safety_level );
+    while( (n--) > 0 ){
+      if( pDb->pBt ){
+        sqlite3BtreeSetPagerFlags(pDb->pBt,
+                 pDb->safety_level | (db->flags & PAGER_FLAGS_MASK) );
+      }
+      pDb++;
+    }
+  }
+}
+#endif
+
+
 #ifndef SQLITE_OMIT_FLAG_PRAGMAS
 /*
 ** Check to see if zRight and zLeft refer to a pragma that queries
@@ -176,6 +204,7 @@ static int flagPragma(Parse *pParse, const char *zLeft, const char *zRight){
     { "legacy_file_format",       SQLITE_LegacyFileFmt },
     { "fullfsync",                SQLITE_FullFSync     },
     { "checkpoint_fullfsync",     SQLITE_CkptFullFSync },
+    { "cache_spill",              SQLITE_CacheSpill    },
     { "reverse_unordered_selects", SQLITE_ReverseOrder  },
     { "query_only",               SQLITE_QueryOnly     },
 #ifndef SQLITE_OMIT_AUTOMATIC_INDEX
@@ -966,6 +995,7 @@ void sqlite3Pragma(
             "Safety level may not be changed inside a transaction");
       }else{
         pDb->safety_level = getSafetyLevel(zRight,0,1)+1;
+        setAllPagerFlags(db);
       }
     }
   }else
@@ -973,8 +1003,7 @@ void sqlite3Pragma(
 
 #ifndef SQLITE_OMIT_FLAG_PRAGMAS
   if( flagPragma(pParse, zLeft, zRight) ){
-    /* The flagPragma() subroutine also generates any necessary code
-    ** there is nothing more to do here */
+    setAllPagerFlags(db);
   }else
 #endif /* SQLITE_OMIT_FLAG_PRAGMAS */
 
@@ -1805,17 +1834,6 @@ void sqlite3Pragma(
  
   {/* Empty ELSE clause */}
 
-  /*
-  ** Reset the safety level, in case the fullfsync flag or synchronous
-  ** setting changed.
-  */
-#ifndef SQLITE_OMIT_PAGER_PRAGMAS
-  if( db->autoCommit ){
-    sqlite3BtreeSetSafetyLevel(pDb->pBt, pDb->safety_level,
-               (db->flags&SQLITE_FullFSync)!=0,
-               (db->flags&SQLITE_CkptFullFSync)!=0);
-  }
-#endif
 pragma_out:
   sqlite3DbFree(db, zLeft);
   sqlite3DbFree(db, zRight);
diff --git a/src/resolve.c b/src/resolve.c
index a194a2655..43a3870e2 100644
--- a/src/resolve.c
+++ b/src/resolve.c
@@ -55,7 +55,7 @@ static void incrAggFunctionDepth(Expr *pExpr, int N){
 ** column reference is so that the column reference will be recognized as
 ** usable by indices within the WHERE clause processing logic. 
 **
-** Hack:  The TK_AS operator is inhibited if zType[0]=='G'.  This means
+** The TK_AS operator is inhibited if zType[0]=='G'.  This means
 ** that in a GROUP BY clause, the expression is evaluated twice.  Hence:
 **
 **     SELECT random()%5 AS x, count(*) FROM tab GROUP BY x
@@ -65,8 +65,9 @@ static void incrAggFunctionDepth(Expr *pExpr, int N){
 **     SELECT random()%5 AS x, count(*) FROM tab GROUP BY random()%5
 **
 ** The result of random()%5 in the GROUP BY clause is probably different
-** from the result in the result-set.  We might fix this someday.  Or
-** then again, we might not...
+** from the result in the result-set.  On the other hand Standard SQL does
+** not allow the GROUP BY clause to contain references to result-set columns.
+** So this should never come up in well-formed queries.
 **
 ** If the reference is followed by a COLLATE operator, then make sure
 ** the COLLATE operator is preserved.  For example:
@@ -396,10 +397,16 @@ static int lookupName(
     ** forms the result set entry ("a+b" in the example) and return immediately.
     ** Note that the expression in the result set should have already been
     ** resolved by the time the WHERE clause is resolved.
+    **
+    ** The ability to use an output result-set column in the WHERE, GROUP BY,
+    ** or HAVING clauses, or as part of a larger expression in the ORDRE BY
+    ** clause is not standard SQL.  This is a (goofy) SQLite extension, that
+    ** is supported for backwards compatibility only.  TO DO: Issue a warning
+    ** on sqlite3_log() whenever the capability is used.
     */
     if( (pEList = pNC->pEList)!=0
      && zTab==0
-     && ((pNC->ncFlags & NC_AsMaybe)==0 || cnt==0)
+     && cnt==0
     ){
       for(j=0; j<pEList->nExpr; j++){
         char *zAs = pEList->a[j].zName;
@@ -961,7 +968,7 @@ static int resolveCompoundOrderBy(
 /*
 ** Check every term in the ORDER BY or GROUP BY clause pOrderBy of
 ** the SELECT statement pSelect.  If any term is reference to a
-** result set expression (as determined by the ExprList.a.iCol field)
+** result set expression (as determined by the ExprList.a.iOrderByCol field)
 ** then convert that term into a copy of the corresponding result set
 ** column.
 **
@@ -1009,7 +1016,7 @@ int sqlite3ResolveOrderGroupBy(
 ** If the order-by term is an integer I between 1 and N (where N is the
 ** number of columns in the result set of the SELECT) then the expression
 ** in the resolution is a copy of the I-th result-set expression.  If
-** the order-by term is an identify that corresponds to the AS-name of
+** the order-by term is an identifier that corresponds to the AS-name of
 ** a result-set expression, then the term resolves to a copy of the
 ** result-set expression.  Otherwise, the expression is resolved in
 ** the usual way - using sqlite3ResolveExprNames().
@@ -1035,16 +1042,19 @@ static int resolveOrderGroupBy(
   pParse = pNC->pParse;
   for(i=0, pItem=pOrderBy->a; i<pOrderBy->nExpr; i++, pItem++){
     Expr *pE = pItem->pExpr;
-    iCol = resolveAsName(pParse, pSelect->pEList, pE);
-    if( iCol>0 ){
-      /* If an AS-name match is found, mark this ORDER BY column as being
-      ** a copy of the iCol-th result-set column.  The subsequent call to
-      ** sqlite3ResolveOrderGroupBy() will convert the expression to a
-      ** copy of the iCol-th result-set expression. */
-      pItem->iOrderByCol = (u16)iCol;
-      continue;
+    Expr *pE2 = sqlite3ExprSkipCollate(pE);
+    if( zType[0]!='G' ){
+      iCol = resolveAsName(pParse, pSelect->pEList, pE2);
+      if( iCol>0 ){
+        /* If an AS-name match is found, mark this ORDER BY column as being
+        ** a copy of the iCol-th result-set column.  The subsequent call to
+        ** sqlite3ResolveOrderGroupBy() will convert the expression to a
+        ** copy of the iCol-th result-set expression. */
+        pItem->iOrderByCol = (u16)iCol;
+        continue;
+      }
     }
-    if( sqlite3ExprIsInteger(sqlite3ExprSkipCollate(pE), &iCol) ){
+    if( sqlite3ExprIsInteger(pE2, &iCol) ){
       /* The ORDER BY term is an integer constant.  Again, set the column
       ** number so that sqlite3ResolveOrderGroupBy() will convert the
       ** order-by term to a copy of the result-set expression */
@@ -1187,7 +1197,7 @@ static int resolveSelectStep(Walker *pWalker, Select *p){
       return WRC_Abort;
     }
   
-    /* Add the expression list to the name-context before parsing the
+    /* Add the output column list to the name-context before parsing the
     ** other expressions in the SELECT statement. This is so that
     ** expressions in the WHERE clause (etc.) can refer to expressions by
     ** aliases in the result set.
@@ -1196,10 +1206,8 @@ static int resolveSelectStep(Walker *pWalker, Select *p){
     ** re-evaluated for each reference to it.
     */
     sNC.pEList = p->pEList;
-    sNC.ncFlags |= NC_AsMaybe;
     if( sqlite3ResolveExprNames(&sNC, p->pHaving) ) return WRC_Abort;
     if( sqlite3ResolveExprNames(&sNC, p->pWhere) ) return WRC_Abort;
-    sNC.ncFlags &= ~NC_AsMaybe;
 
     /* The ORDER BY and GROUP BY clauses may not refer to terms in
     ** outer queries 
diff --git a/src/shell.c b/src/shell.c
index 4a59c667a..c811057ae 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -2902,6 +2902,7 @@ static int process_input(struct callback_data *p, FILE *in){
     if( nSql==0 ){
       int i;
       for(i=0; zLine[i] && IsSpace(zLine[i]); i++){}
+      assert( nAlloc>0 && zSql!=0 );
       memcpy(zSql, zLine+i, nLine+1-i);
       startline = lineno;
       nSql = nLine-i;
diff --git a/src/sqlite.h.in b/src/sqlite.h.in
index 551a11857..08aae5494 100644
--- a/src/sqlite.h.in
+++ b/src/sqlite.h.in
@@ -7323,4 +7323,4 @@ SQLITE_EXPERIMENTAL int sqlite3_preupdate_new(sqlite3 *, int, sqlite3_value **);
 #ifdef __cplusplus
 }  /* End of the 'extern "C"' block */
 #endif
-#endif
+#endif /* _SQLITE3_H_ */
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index b16295904..32057eeba 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -980,32 +980,33 @@ struct sqlite3 {
 */
 #define SQLITE_VdbeTrace      0x00000001  /* True to trace VDBE execution */
 #define SQLITE_InternChanges  0x00000002  /* Uncommitted Hash table changes */
-#define SQLITE_FullColNames   0x00000004  /* Show full column names on SELECT */
-#define SQLITE_ShortColNames  0x00000008  /* Show short columns names */
-#define SQLITE_CountRows      0x00000010  /* Count rows changed by INSERT, */
+#define SQLITE_FullFSync      0x00000004  /* Use full fsync on the backend */
+#define SQLITE_CkptFullFSync  0x00000008  /* Use full fsync for checkpoint */
+#define SQLITE_CacheSpill     0x00000010  /* OK to spill pager cache */
+#define SQLITE_FullColNames   0x00000020  /* Show full column names on SELECT */
+#define SQLITE_ShortColNames  0x00000040  /* Show short columns names */
+#define SQLITE_CountRows      0x00000080  /* Count rows changed by INSERT, */
                                           /*   DELETE, or UPDATE and return */
                                           /*   the count using a callback. */
-#define SQLITE_NullCallback   0x00000020  /* Invoke the callback once if the */
+#define SQLITE_NullCallback   0x00000100  /* Invoke the callback once if the */
                                           /*   result set is empty */
-#define SQLITE_SqlTrace       0x00000040  /* Debug print SQL as it executes */
-#define SQLITE_VdbeListing    0x00000080  /* Debug listings of VDBE programs */
-#define SQLITE_WriteSchema    0x00000100  /* OK to update SQLITE_MASTER */
-#define SQLITE_VdbeAddopTrace 0x00000200  /* Trace sqlite3VdbeAddOp() calls */
-#define SQLITE_IgnoreChecks   0x00000400  /* Do not enforce check constraints */
-#define SQLITE_ReadUncommitted 0x0000800  /* For shared-cache mode */
-#define SQLITE_LegacyFileFmt  0x00001000  /* Create new databases in format 1 */
-#define SQLITE_FullFSync      0x00002000  /* Use full fsync on the backend */
-#define SQLITE_CkptFullFSync  0x00004000  /* Use full fsync for checkpoint */
-#define SQLITE_RecoveryMode   0x00008000  /* Ignore schema errors */
-#define SQLITE_ReverseOrder   0x00010000  /* Reverse unordered SELECTs */
-#define SQLITE_RecTriggers    0x00020000  /* Enable recursive triggers */
-#define SQLITE_ForeignKeys    0x00040000  /* Enforce foreign key constraints  */
-#define SQLITE_AutoIndex      0x00080000  /* Enable automatic indexes */
-#define SQLITE_PreferBuiltin  0x00100000  /* Preference to built-in funcs */
-#define SQLITE_LoadExtension  0x00200000  /* Enable load_extension */
-#define SQLITE_EnableTrigger  0x00400000  /* True to enable triggers */
-#define SQLITE_DeferFKs       0x00800000  /* Defer all FK constraints */
-#define SQLITE_QueryOnly      0x01000000  /* Disable database changes */
+#define SQLITE_SqlTrace       0x00000200  /* Debug print SQL as it executes */
+#define SQLITE_VdbeListing    0x00000400  /* Debug listings of VDBE programs */
+#define SQLITE_WriteSchema    0x00000800  /* OK to update SQLITE_MASTER */
+#define SQLITE_VdbeAddopTrace 0x00001000  /* Trace sqlite3VdbeAddOp() calls */
+#define SQLITE_IgnoreChecks   0x00002000  /* Do not enforce check constraints */
+#define SQLITE_ReadUncommitted 0x0004000  /* For shared-cache mode */
+#define SQLITE_LegacyFileFmt  0x00008000  /* Create new databases in format 1 */
+#define SQLITE_RecoveryMode   0x00010000  /* Ignore schema errors */
+#define SQLITE_ReverseOrder   0x00020000  /* Reverse unordered SELECTs */
+#define SQLITE_RecTriggers    0x00040000  /* Enable recursive triggers */
+#define SQLITE_ForeignKeys    0x00080000  /* Enforce foreign key constraints  */
+#define SQLITE_AutoIndex      0x00100000  /* Enable automatic indexes */
+#define SQLITE_PreferBuiltin  0x00200000  /* Preference to built-in funcs */
+#define SQLITE_LoadExtension  0x00400000  /* Enable load_extension */
+#define SQLITE_EnableTrigger  0x00800000  /* True to enable triggers */
+#define SQLITE_DeferFKs       0x01000000  /* Defer all FK constraints */
+#define SQLITE_QueryOnly      0x02000000  /* Disable database changes */
 
 
 /*
@@ -2014,7 +2015,7 @@ struct SrcList {
 struct NameContext {
   Parse *pParse;       /* The parser */
   SrcList *pSrcList;   /* One or more tables used to resolve names */
-  ExprList *pEList;    /* Optional list of named expressions */
+  ExprList *pEList;    /* Optional list of result-set columns */
   AggInfo *pAggInfo;   /* Information about aggregates at this level */
   NameContext *pNext;  /* Next outer name context.  NULL for outermost */
   int nRef;            /* Number of names resolved by this context */
@@ -2029,9 +2030,7 @@ struct NameContext {
 #define NC_HasAgg    0x02    /* One or more aggregate functions seen */
 #define NC_IsCheck   0x04    /* True if resolving names in a CHECK constraint */
 #define NC_InAggFunc 0x08    /* True if analyzing arguments to an agg func */
-#define NC_AsMaybe   0x10    /* Resolve to AS terms of the result set only
-                             ** if no other resolution is available */
-#define NC_PartIdx   0x20    /* True if resolving a partial index WHERE */
+#define NC_PartIdx   0x10    /* True if resolving a partial index WHERE */
 
 /*
 ** An instance of the following structure contains all information
diff --git a/src/tclsqlite.c b/src/tclsqlite.c
index 78a03083b..322f84986 100644
--- a/src/tclsqlite.c
+++ b/src/tclsqlite.c
@@ -41,6 +41,18 @@
 #endif
 #include <ctype.h>
 
+/* Used to get the current process ID */
+#if !defined(_WIN32)
+# include <unistd.h>
+# define GETPID getpid
+#elif !defined(_WIN32_WCE)
+# ifndef SQLITE_AMALGAMATION
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+# endif
+# define GETPID (int)GetCurrentProcessId
+#endif
+
 /*
  * Windows needs to know which symbols to export.  Unix does not.
  * BUILD_sqlite should be undefined for Unix.
@@ -3898,7 +3910,16 @@ static void init_all(Tcl_Interp *interp){
 #define TCLSH_MAIN main   /* Needed to fake out mktclapp */
 int TCLSH_MAIN(int argc, char **argv){
   Tcl_Interp *interp;
-  
+
+#if !defined(_WIN32_WCE)
+  if( getenv("BREAK") ){
+    fprintf(stderr,
+        "attach debugger to process %d and press any key to continue.\n",
+        GETPID());
+    fgetc(stdin);
+  }
+#endif
+
   /* Call sqlite3_shutdown() once before doing anything else. This is to
   ** test that sqlite3_shutdown() can be safely called by a process before
   ** sqlite3_initialize() is. */
diff --git a/src/test_autoext.c b/src/test_autoext.c
index 4a5a5caa0..a5236d239 100644
--- a/src/test_autoext.c
+++ b/src/test_autoext.c
@@ -208,13 +208,13 @@ int Sqlitetest_autoext_Init(Tcl_Interp *interp){
           autoExtCubeObjCmd, 0, 0);
   Tcl_CreateObjCommand(interp, "sqlite3_auto_extension_broken",
           autoExtBrokenObjCmd, 0, 0);
-#endif
   Tcl_CreateObjCommand(interp, "sqlite3_cancel_auto_extension_sqr",
           cancelAutoExtSqrObjCmd, 0, 0);
   Tcl_CreateObjCommand(interp, "sqlite3_cancel_auto_extension_cube",
           cancelAutoExtCubeObjCmd, 0, 0);
   Tcl_CreateObjCommand(interp, "sqlite3_cancel_auto_extension_broken",
           cancelAutoExtBrokenObjCmd, 0, 0);
+#endif
   Tcl_CreateObjCommand(interp, "sqlite3_reset_auto_extension",
           resetAutoExtObjCmd, 0, 0);
   return TCL_OK;
diff --git a/src/test_demovfs.c b/src/test_demovfs.c
index 637627071..c63b0a8b7 100644
--- a/src/test_demovfs.c
+++ b/src/test_demovfs.c
@@ -536,7 +536,7 @@ static int demoFullPathname(
   if( zPath[0]=='/' ){
     zDir[0] = '\0';
   }else{
-    getcwd(zDir, sizeof(zDir));
+    if( getcwd(zDir, sizeof(zDir))==0 ) return SQLITE_IOERR;
   }
   zDir[MAXPATHNAME] = '\0';
 
diff --git a/src/test_fs.c b/src/test_fs.c
index 478cad80b..417c81b49 100644
--- a/src/test_fs.c
+++ b/src/test_fs.c
@@ -195,6 +195,7 @@ static int fsColumn(sqlite3_vtab_cursor *cur, sqlite3_context *ctx, int i){
     const char *zFile = (const char *)sqlite3_column_text(pCur->pStmt, 1);
     struct stat sbuf;
     int fd;
+    int n;
 
     fd = open(zFile, O_RDONLY);
     if( fd<0 ) return SQLITE_IOERR;
@@ -214,8 +215,9 @@ static int fsColumn(sqlite3_vtab_cursor *cur, sqlite3_context *ctx, int i){
       pCur->nAlloc = nNew;
     }
 
-    read(fd, pCur->zBuf, sbuf.st_size);
+    n = (int)read(fd, pCur->zBuf, sbuf.st_size);
     close(fd);
+    if( n!=sbuf.st_size ) return SQLITE_ERROR;
     pCur->nBuf = sbuf.st_size;
     pCur->zBuf[pCur->nBuf] = '\0';
 
diff --git a/src/test_intarray.h b/src/test_intarray.h
index 691337d1a..6d26235a8 100644
--- a/src/test_intarray.h
+++ b/src/test_intarray.h
@@ -75,6 +75,8 @@
 ** action to free the intarray objects.
 */
 #include "sqlite3.h"
+#ifndef _INTARRAY_H_
+#define _INTARRAY_H_
 
 /*
 ** Make sure we can call this stuff from C++.
@@ -123,3 +125,4 @@ int sqlite3_intarray_bind(
 #ifdef __cplusplus
 }  /* End of the 'extern "C"' block */
 #endif
+#endif /* _INTARRAY_H_ */
diff --git a/src/test_multiplex.h b/src/test_multiplex.h
index b7e1afea5..9fe2f0f2b 100644
--- a/src/test_multiplex.h
+++ b/src/test_multiplex.h
@@ -96,4 +96,4 @@ extern int sqlite3_multiplex_shutdown(void);
 }  /* End of the 'extern "C"' block */
 #endif
 
-#endif
+#endif /* _TEST_MULTIPLEX_H */
diff --git a/src/vdbe.c b/src/vdbe.c
index efbd182f2..75b9d2cff 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -6294,6 +6294,7 @@ vdbe_error_halt:
   ** top. */
 vdbe_return:
   db->lastRowid = lastRowid;
+  testcase( nVmStep>0 );
   p->aCounter[SQLITE_STMTSTATUS_VM_STEP-1] += (int)nVmStep;
   sqlite3VdbeLeave(p);
   return rc;
diff --git a/src/where.c b/src/where.c
index 2bf3aaecb..92a9d3eb8 100644
--- a/src/where.c
+++ b/src/where.c
@@ -33,7 +33,7 @@
 # define WHERETRACE(K,X)
 #endif
 
-/* Forward reference
+/* Forward references
 */
 typedef struct WhereClause WhereClause;
 typedef struct WhereMaskSet WhereMaskSet;
@@ -55,14 +55,15 @@ typedef struct WhereOrSet WhereOrSet;
 ** So all costs can be stored in a 16-bit unsigned integer without risk
 ** of overflow.
 **
-** Costs are estimates, so don't go to the computational trouble to compute
-** 10*log2(X) exactly.  Instead, a close estimate is used.  Any value of
-** X<=1 is stored as 0.  X=2 is 10.  X=3 is 16.  X=1000 is 99. etc.
+** Costs are estimates, so no effort is made to compute 10*log2(X) exactly.
+** Instead, a close estimate is used.  Any value of X<=1 is stored as 0.
+** X=2 is 10.  X=3 is 16.  X=1000 is 99. etc.
 **
 ** The tool/wherecosttest.c source file implements a command-line program
-** that will convert between WhereCost to integers and do addition and
-** multiplication on WhereCost values.  That command-line program is a
-** useful utility to have around when working with this module.
+** that will convert WhereCosts to integers, convert integers to WhereCosts
+** and do addition and multiplication on WhereCost values.  The wherecosttest
+** command-line program is a useful utility to have around when working with
+** this module.
 */
 typedef unsigned short int WhereCost;
 
@@ -165,8 +166,8 @@ struct WhereOrCost {
 };
 
 /* The WhereOrSet object holds a set of possible WhereOrCosts that
-** correspond to the subquery(s) of OR-clause processing.  At most
-** favorable N_OR_COST elements are retained.
+** correspond to the subquery(s) of OR-clause processing.  Only the
+** best N_OR_COST elements are retained.
 */
 #define N_OR_COST 3
 struct WhereOrSet {
@@ -232,9 +233,9 @@ struct WherePath {
 **
 **         (t1.X <op> <expr>) OR (t1.Y <op> <expr>) OR ....
 **
-** In this second case, wtFlag as the TERM_ORINFO set and eOperator==WO_OR
+** In this second case, wtFlag has the TERM_ORINFO bit set and eOperator==WO_OR
 ** and the WhereTerm.u.pOrInfo field points to auxiliary information that
-** is collected about the
+** is collected about the OR clause.
 **
 ** If a term in the WHERE clause does not match either of the two previous
 ** categories, then eOperator==0.  The WhereTerm.pExpr field is still set
@@ -746,7 +747,7 @@ static void createMask(WhereMaskSet *pMaskSet, int iCursor){
 }
 
 /*
-** These routine walk (recursively) an expression tree and generates
+** These routines walk (recursively) an expression tree and generate
 ** a bitmask indicating which tables are used in that expression
 ** tree.
 */
@@ -1263,10 +1264,10 @@ static void transferJoinMarkings(Expr *pDerived, Expr *pBase){
 ** From another point of view, "indexable" means that the subterm could
 ** potentially be used with an index if an appropriate index exists.
 ** This analysis does not consider whether or not the index exists; that
-** is something the bestIndex() routine will determine.  This analysis
-** only looks at whether subterms appropriate for indexing exist.
+** is decided elsewhere.  This analysis only looks at whether subterms
+** appropriate for indexing exist.
 **
-** All examples A through E above all satisfy case 2.  But if a term
+** All examples A through E above satisfy case 2.  But if a term
 ** also statisfies case 1 (such as B) we know that the optimizer will
 ** always prefer case 1, so in that case we pretend that case 2 is not
 ** satisfied.
@@ -1933,7 +1934,7 @@ static int isDistinctRedundant(
 }
 
 /* 
-** The (an approximate) sum of two WhereCosts.  This computation is
+** Find (an approximate) sum of two WhereCosts.  This computation is
 ** not a simple "+" operator because WhereCost is stored as a logarithmic
 ** value.
 ** 
@@ -4854,6 +4855,7 @@ static int whereLoopAddOr(WhereLoopBuilder *pBuilder, Bitmask mExtra){
   if( pWInfo->wctrlFlags & WHERE_AND_ONLY ) return SQLITE_OK;
   pWCEnd = pWC->a + pWC->nTerm;
   pNew = pBuilder->pNew;
+  memset(&sSum, 0, sizeof(sSum));
 
   for(pTerm=pWC->a; pTerm<pWCEnd && rc==SQLITE_OK; pTerm++){
     if( (pTerm->eOperator & WO_OR)!=0
diff --git a/test/index6.test b/test/index6.test
index e9ea570b8..d70e86aef 100644
--- a/test/index6.test
+++ b/test/index6.test
@@ -144,12 +144,21 @@ do_test index6-2.2 {
     SELECT * FROM t2 WHERE a=5;
   }
 } {/.* TABLE t2 USING INDEX t2a1 .*/}
-do_test index6-2.3 {
-  execsql {
-    EXPLAIN QUERY PLAN
-    SELECT * FROM t2 WHERE a IS NOT NULL;
-  }
-} {/.* TABLE t2 USING INDEX t2a1 .*/}
+ifcapable stat3 {
+  do_test index6-2.3stat3 {
+    execsql {
+      EXPLAIN QUERY PLAN
+      SELECT * FROM t2 WHERE a IS NOT NULL;
+    }
+  } {/.* TABLE t2 USING INDEX t2a1 .*/}
+} else {
+  do_test index6-2.3stat3 {
+    execsql {
+      EXPLAIN QUERY PLAN
+      SELECT * FROM t2 WHERE a IS NOT NULL AND a>0;
+    }
+  } {/.* TABLE t2 USING INDEX t2a1 .*/}
+}
 do_test index6-2.4 {
   execsql {
     EXPLAIN QUERY PLAN
diff --git a/test/pragma2.test b/test/pragma2.test
index 1111a984b..4a9fe8d94 100644
--- a/test/pragma2.test
+++ b/test/pragma2.test
@@ -22,6 +22,7 @@ source $testdir/tester.tcl
 # pragma2-1.*: Test freelist_count pragma on the main database.
 # pragma2-2.*: Test freelist_count pragma on an attached database.
 # pragma2-3.*: Test trying to write to the freelist_count is a no-op.
+# pragma2-4.*: Tests for PRAGMA cache_spill
 #
 
 ifcapable !pragma||!schema_pragmas {
@@ -116,4 +117,78 @@ ifcapable attach {
   } {9 9}
 }
 
+# Default setting of PRAGMA cache_spill is always ON
+#
+db close
+delete_file test.db test.db-journal
+delete_file test2.db test2.db-journal
+sqlite3 db test.db
+do_execsql_test pragma2-4.1 {
+  PRAGMA cache_spill;
+  PRAGMA main.cache_spill;
+  PRAGMA temp.cache_spill;
+} {1 1 1}
+do_execsql_test pragma2-4.2 {
+  PRAGMA cache_spill=OFF;
+  PRAGMA cache_spill;
+  PRAGMA main.cache_spill;
+  PRAGMA temp.cache_spill;
+} {0 0 0}
+do_execsql_test pragma2-4.3 {
+  PRAGMA page_size=1024;
+  PRAGMA cache_size=50;
+  BEGIN;
+  CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);
+  INSERT INTO t1 VALUES(1, randomblob(400), 1, randomblob(400));
+  INSERT INTO t1 SELECT a+1, randomblob(400), a+1, randomblob(400) FROM t1;
+  INSERT INTO t1 SELECT a+2, randomblob(400), a+2, randomblob(400) FROM t1;
+  INSERT INTO t1 SELECT a+4, randomblob(400), a+4, randomblob(400) FROM t1;
+  INSERT INTO t1 SELECT a+8, randomblob(400), a+8, randomblob(400) FROM t1;
+  INSERT INTO t1 SELECT a+16, randomblob(400), a+16, randomblob(400) FROM t1;
+  INSERT INTO t1 SELECT a+32, randomblob(400), a+32, randomblob(400) FROM t1;
+  INSERT INTO t1 SELECT a+64, randomblob(400), a+64, randomblob(400) FROM t1;
+  COMMIT;
+  ATTACH 'test2.db' AS aux1;
+  CREATE TABLE aux1.t2(a INTEGER PRIMARY KEY, b, c, d);
+  INSERT INTO t2 SELECT * FROM t1;
+  DETACH aux1;
+  PRAGMA cache_spill=ON;
+} {}
+do_test pragma2-4.4 {
+  db eval {
+    BEGIN;
+    UPDATE t1 SET c=c+1;
+    PRAGMA lock_status;
+  }
+} {main exclusive temp unknown}  ;# EXCLUSIVE lock due to cache spill
+do_test pragma2-4.5 {
+  db eval {
+    COMMIT;
+    PRAGMA cache_spill=OFF;
+    BEGIN;
+    UPDATE t1 SET c=c-1;
+    PRAGMA lock_status;
+  }
+} {main reserved temp unknown}   ;# No cache spill, so no exclusive lock
+
+# Verify that newly attached databases inherit the cache_spill=OFF
+# setting.
+#
+do_execsql_test pragma2-4.6 {
+  COMMIT;
+  ATTACH 'test2.db' AS aux1;
+  PRAGMA aux1.cache_size=50;
+  BEGIN;
+  UPDATE t2 SET c=c+1;
+  PRAGMA lock_status;
+} {main unlocked temp unknown aux1 reserved}
+do_execsql_test pragma2-4.7 {
+  COMMIT;
+  PRAGMA cache_spill=ON; -- Applies to all databases
+  BEGIN;
+  UPDATE t2 SET c=c-1;
+  PRAGMA lock_status;
+} {main unlocked temp unknown aux1 exclusive}
+   
+
 finish_test
diff --git a/test/resolver01.test b/test/resolver01.test
index 3ca6acec4..7d95a2132 100644
--- a/test/resolver01.test
+++ b/test/resolver01.test
@@ -13,10 +13,18 @@
 # figures out what identifiers in the SQL statement refer to) that
 # were fixed by ticket [2500cdb9be]
 #
+# See also tickets [1c69be2daf] and [f617ea3125] from 2013-08-14.
+#
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
+# "ORDER BY y" binds to the output result-set column named "y"
+# if available.  If no output column is named "y", then try to
+# bind against an input column named "y".
+#
+# This is classical SQL92 behavior.
+#
 do_test resolver01-1.1 {
   catchsql {
     CREATE TABLE t1(x, y); INSERT INTO t1 VALUES(11,22);
@@ -26,14 +34,175 @@ do_test resolver01-1.1 {
 } {0 1}
 do_test resolver01-1.2 {
   catchsql {
+    SELECT 1 AS yy FROM t1, t2 ORDER BY y;
+  }
+} {1 {ambiguous column name: y}}
+do_test resolver01-1.3 {
+  catchsql {
+    CREATE TABLE t3(x,y); INSERT INTO t3 VALUES(11,44),(33,22);
+    SELECT x AS y FROM t3 ORDER BY y;
+  }
+} {0 {11 33}}
+do_test resolver01-1.4 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY y;
+  }
+} {0 {33 11}}
+
+# SQLite allows the WHERE clause to reference output columns if there is
+# no other way to resolve the name.
+#
+do_test resolver01-1.5 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY yy;
+  }
+} {0 {11 33}}
+do_test resolver01-1.6 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY 1;
+  }
+} {0 {11 33}}
+
+# The "ORDER BY y COLLATE nocase" form works the same as "ORDER BY y".
+# The "y" binds more tightly to output columns than to input columns.
+#
+# This is for compatibility with SQL92 and with historical SQLite behavior.
+# Note that PostgreSQL considers "y COLLATE nocase" to be an expression
+# and thus PostgreSQL treats this case as if it where the 3.x case below.
+#
+do_test resolver01-2.1 {
+  catchsql {
     SELECT 2 AS y FROM t1, t2 ORDER BY y COLLATE nocase;
   }
 } {0 2}
-do_test resolver01-1.3 {
+do_test resolver01-2.2 {
+  catchsql {
+    SELECT 2 AS yy FROM t1, t2 ORDER BY y COLLATE nocase;
+  }
+} {1 {ambiguous column name: y}}
+do_test resolver01-2.3 {
+  catchsql {
+    SELECT x AS y FROM t3 ORDER BY y COLLATE nocase;
+  }
+} {0 {11 33}}
+do_test resolver01-2.4 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY y COLLATE nocase;
+  }
+} {0 {33 11}}
+do_test resolver01-2.5 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY yy COLLATE nocase;
+  }
+} {0 {11 33}}
+do_test resolver01-2.6 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY 1 COLLATE nocase;
+  }
+} {0 {11 33}}
+
+# But if the form is "ORDER BY expr" then bind more tightly to the
+# the input column names and only use the output column names if no
+# input column name matches.
+#
+# This is SQL99 behavior, as implemented by PostgreSQL and MS-SQL.
+# Note that Oracle works differently.
+#
+do_test resolver01-3.1 {
   catchsql {
     SELECT 3 AS y FROM t1, t2 ORDER BY +y;
   }
-} {0 3}
+} {1 {ambiguous column name: y}}
+do_test resolver01-3.2 {
+  catchsql {
+    SELECT 2 AS yy FROM t1, t2 ORDER BY +y;
+  }
+} {1 {ambiguous column name: y}}
+do_test resolver01-3.3 {
+  catchsql {
+    SELECT x AS y FROM t3 ORDER BY +y;
+  }
+} {0 {33 11}}
+do_test resolver01-3.4 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY +y;
+  }
+} {0 {33 11}}
+do_test resolver01-3.5 {
+  catchsql {
+    SELECT x AS yy FROM t3 ORDER BY +yy
+  }
+} {0 {11 33}}
+
+# This is the test case given in ticket [f617ea3125e9] (with table name
+# changed from "t1" to "t4".  The behavior of (1) and (3) match with
+# PostgreSQL, but we intentionally break with PostgreSQL to provide
+# SQL92 behavior for case (2).
+#
+do_execsql_test resolver01-4.1 {
+  CREATE TABLE t4(m CHAR(2));
+  INSERT INTO t4 VALUES('az');
+  INSERT INTO t4 VALUES('by');
+  INSERT INTO t4 VALUES('cx');
+  SELECT '1', substr(m,2) AS m FROM t4 ORDER BY m;
+  SELECT '2', substr(m,2) AS m FROM t4 ORDER BY m COLLATE binary;
+  SELECT '3', substr(m,2) AS m FROM t4 ORDER BY lower(m);
+} {1 x 1 y 1 z 2 x 2 y 2 z 3 z 3 y 3 x}
+
+##########################################################################
+# Test cases for ticket [1c69be2dafc28]:  Make sure the GROUP BY binds
+# more tightly to the input tables in all cases.
+#
+# This first case case has been wrong in SQLite for time out of mind.
+# For SQLite version 3.7.17 the answer was two rows, which is wrong.
+#
+do_execsql_test resolver01-5.1 {
+  CREATE TABLE t5(m CHAR(2));
+  INSERT INTO t5 VALUES('ax');
+  INSERT INTO t5 VALUES('bx');
+  INSERT INTO t5 VALUES('cy');
+  SELECT count(*), substr(m,2,1) AS m FROM t5 GROUP BY m ORDER BY 1, 2;
+} {1 x 1 x 1 y}
+
+# This case is unambiguous and has always been correct.
+#
+do_execsql_test resolver01-5.2 {
+  SELECT count(*), substr(m,2,1) AS mx FROM t5 GROUP BY m ORDER BY 1, 2;
+} {1 x 1 x 1 y}
+
+# This case is not allowed in standard SQL, but SQLite allows and does
+# the sensible thing.
+#
+do_execsql_test resolver01-5.3 {
+  SELECT count(*), substr(m,2,1) AS mx FROM t5 GROUP BY mx ORDER BY 1, 2;
+} {1 y 2 x}
+do_execsql_test resolver01-5.4 {
+  SELECT count(*), substr(m,2,1) AS mx FROM t5
+   GROUP BY substr(m,2,1) ORDER BY 1, 2;
+} {1 y 2 x}
+
+# These test case weere provided in the 2013-08-14 email from Rob Golsteijn
+# that originally reported the problem of ticket [1c69be2dafc28].
+#
+do_execsql_test resolver01-6.1 {
+  CREATE TABLE t61(name);
+  SELECT min(name) FROM t61 GROUP BY lower(name);
+} {}
+do_execsql_test resolver01-6.2 {
+  SELECT min(name) AS name FROM t61 GROUP BY lower(name); 
+} {}
+do_execsql_test resolver01-6.3 {
+  CREATE TABLE t63(name);
+  INSERT INTO t63 VALUES (NULL);
+  INSERT INTO t63 VALUES ('abc');
+  SELECT count(),
+       NULLIF(name,'abc') AS name
+    FROM t63
+   GROUP BY lower(name);
+} {1 {} 1 {}}
+
+
+
 
 
 finish_test
diff --git a/test/tkt2822.test b/test/tkt2822.test
index d3512d303..d0b16338c 100644
--- a/test/tkt2822.test
+++ b/test/tkt2822.test
@@ -208,15 +208,12 @@ do_test tkt2822-5.4 {
 
 # In "ORDER BY +b" the term is now an expression rather than
 # a label.  It therefore matches by rule (3) instead of rule (2).
-#
-# 2013-04-13:  This is busted.  Changed to conform to PostgreSQL and
-# MySQL and Oracle behavior.
 # 
 do_test tkt2822-5.5 {
   execsql {
     SELECT a AS b FROM t3 ORDER BY +b;
   }
-} {1 9}
+} {9 1}
 
 # Tests for rule 2 in compound queries
 #