Disable the IS NOT NULL optimization when the IS NOT NULL operator is part

of the ON clause of a LEFT JOIN. Fix for ticket [65eb38f6e46de8c75e188a17ec].

FossilOrigin-Name: 8d09ce5d738bb00c4524c663ec69555fe917ac733d58b06a302675ce7fe33fca

diff --git a/manifest b/manifest
index 63cfa044061c530a2c28ba97a5a0bbd7504c1804..29b5889355078eb71d83e317f83cebc7afcf761c 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sextra\sdefenses\sagainst\sstrategically\scorrupt\sdatabases\sto\sfts3/4.
-D 2018-11-05T13:43:03.441
+C Disable\sthe\sIS\sNOT\sNULL\soptimization\swhen\sthe\sIS\sNOT\sNULL\soperator\sis\spart\nof\sthe\sON\sclause\sof\sa\sLEFT\sJOIN.\sFix\sfor\sticket\s[65eb38f6e46de8c75e188a17ec].
+D 2018-11-05T13:48:50.436
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 6b650013511fd9d8b094203ac268af9220d292cc7d4e1bc9fbca15aacd8c7995
@@ -589,7 +589,7 @@ F src/walker.c ba7225773931760cf60bf22f34d0cce2588df7ce5ce0f215a52eb88234b55ac4
 F src/where.c 2019126801437944c38cc62a99491e98591460b7cc07ab57eb66165f710a289b
 F src/whereInt.h b90ef9b9707ef750eab2a7a080c48fb4900315033274689def32d0cf5a81ebe4
 F src/wherecode.c cf6d3ac7b428102c1ebbff8758cf932ce38a31ed7704960010b6a90a9849b1f5
-F src/whereexpr.c eb462ebe085f6cbb6bdda797a041fbd7e3724586203344043d1088a2117d8e44
+F src/whereexpr.c 0f496c579f3c95aebb3d3e223ec6571d97dfd598140656c90ca93046bdfeaf69
 F src/window.c 4b503da928dace3e845b891381a4d98eeb8c5744313ae3643df8d8d21fdcca65
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/affinity2.test a6d901b436328bd67a79b41bb0ac2663918fe3bd
@@ -1612,7 +1612,7 @@ F test/walrofault.test c70cb6e308c443867701856cce92ad8288cd99488fa52afab77cca6cf
 F test/walshared.test 0befc811dcf0b287efae21612304d15576e35417
 F test/walslow.test c05c68d4dc2700a982f89133ce103a1a84cc285f
 F test/walthread.test 14b20fcfa6ae152f5d8e12f5dc8a8a724b7ef189f5d8ef1e2ceab79f2af51747
-F test/where.test 480cfc1758ac9df3f70c6a2541ff586f6a4833354d5ecb548f643e30e31fddc8
+F test/where.test 8215d220633f08da331781cf9ede7fb7aed50eb113473c10acd39a643fd258ba
 F test/where2.test 478d2170637b9211f593120648858593bf2445a1
 F test/where3.test 2341a294e17193a6b1699ea7f192124a5286ca6acfcc3f4b06d16c931fbcda2c
 F test/where4.test 4a371bfcc607f41d233701bdec33ac2972908ba8
@@ -1768,8 +1768,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 1250ab8f22c1e34ed478588c2a858af78c45c128db30f703ece41b17c8d42a09
-Q +d44318f59044162e229a444582692e9788f17b5c404b4eb702f4c2114b22fefe
-R 05d8d0ec60efbf8570a1c4307775674c
+P 940f2adc8541a838c19ceeb62105074117c906efa0f36610a0d3e8d6f859154f
+Q +af39661e60f562b9eb10343fd83e8fe21be4d7276111e7853c1179a24cab09ce
+R 00cfcd9deda5635c7483df5f9218a978
 U drh
-Z 1deafe4bc1793dd8d5f9acd1ca48b23e
+Z 5d2638a31186a94d2b85ae4f1ce9a73f

diff --git a/manifest.uuid b/manifest.uuid
index 37859d2c719a8ef4adfe8dcbeb36f2cf9878fa62..093903bdc564618f61f139c2ffdbdd910e1183a7 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-940f2adc8541a838c19ceeb62105074117c906efa0f36610a0d3e8d6f859154f
\ No newline at end of file
+8d09ce5d738bb00c4524c663ec69555fe917ac733d58b06a302675ce7fe33fca
\ No newline at end of file

diff --git a/src/whereexpr.c b/src/whereexpr.c
index 808c0d21c740c4beef880a38ad075950dd1fd874..6786dcacbd08994932378dd1a1d5b7df8e7e9ee0 100644 (file)
--- a/src/whereexpr.c
+++ b/src/whereexpr.c
@@ -1382,6 +1382,7 @@ static void exprAnalyze(
   if( pExpr->op==TK_NOTNULL
    && pExpr->pLeft->op==TK_COLUMN
    && pExpr->pLeft->iColumn>=0
+   && !ExprHasProperty(pExpr, EP_FromJoin)
    && OptimizationEnabled(db, SQLITE_Stat34)
   ){
     Expr *pNewExpr;

diff --git a/test/where.test b/test/where.test
index db0bc47a7c01c743dbad456dea5b72d4bc7e4335..1f38065c65c3c161be5b3b0e67434290a830a4bd 100644 (file)
--- a/test/where.test
+++ b/test/where.test
@@ -1413,4 +1413,17 @@ do_execsql_test where-21.1 {
   4 0 1
 }
 
+# 2018-11-05: ticket [https://www.sqlite.org/src/tktview/65eb38f6e46de8c75e188a]
+# Incorrect result in LEFT JOIN when STAT4 is enabled.
+#
+sqlite3 db :memory:
+do_execsql_test where-22.1 {
+  CREATE TABLE t1(a INT);
+  CREATE INDEX t1a ON t1(a);
+  INSERT INTO t1(a) VALUES(NULL),(NULL),(42),(NULL),(NULL);
+  CREATE TABLE t2(dummy INT);
+  SELECT count(*) FROM t1 LEFT JOIN t2 ON a IS NOT NULL;
+} {5}
+
+
 finish_test