From: dan <dan@noemail.net>
Date: Sat, 11 May 2019 16:14:42 +0000 (+0000)
Subject: When considering partial indexes, do not assume that a "CASE x ..." expression implie... 
X-Git-Tag: version-3.29.0~106
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c6824c8d6c2def197044cad984481eb981d38998;p=thirdparty%2Fsqlite.git

When considering partial indexes, do not assume that a "CASE x ..." expression implies "x IS NOT NULL".

FossilOrigin-Name: 1b24303220b7b4f59520176a0150fc619c668865450b4fdaa9ce4113a56e9687
---

diff --git a/manifest b/manifest
index 4f454bd521..2f69eeca87 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Do\snot\sassume\sthat\s"x\sIS\sNOT\s?"\simplies\s"x\sNOT\sNULL"\swhen\sconsidering\spartial\sindexes.\sFix\sfor\sticket\s[8025674847].
-D 2019-05-11T13:04:33.943
+C When\sconsidering\spartial\sindexes,\sdo\snot\sassume\sthat\sa\s"CASE\sx\s..."\sexpression\simplies\s"x\sIS\sNOT\sNULL".
+D 2019-05-11T16:14:42.493
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -473,7 +473,7 @@ F src/date.c ebe1dc7c8a347117bb02570f1a931c62dd78f4a2b1b516f4837d45b7d6426957
 F src/dbpage.c 135eb3b5e74f9ef74bde5cec2571192c90c86984fa534c88bf4a055076fa19b7
 F src/dbstat.c c12833de69cb655751487d2c5a59607e36be1c58ba1f4bd536609909ad47b319
 F src/delete.c d08c9e01a2664afd12edcfa3a9c6578517e8ff8735f35509582693adbe0edeaf
-F src/expr.c ff970039f7225f3693b27e5430581d1b85fd0f4c4c1c6fa2feb2886a4ed8bb38
+F src/expr.c de746e2fc5ee48441b1210fba9a39160981718430e6a75b3a2ba29a99957cb71
 F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c 0e14d4bef8eac2d87bbd517e492d9084c65008d117823f8922c5e7b2b599bd33
 F src/func.c 08d6d07d138735dd79f12a2b0c623d1dc9270d0eea61b8be584625391ef84475
@@ -1038,7 +1038,7 @@ F test/index2.test f835d5e13ca163bd78c4459ca15fd2e4ed487407
 F test/index3.test 51685f39345462b84fcf77eb8537af847fdf438cc96b05c45d6aaca4e473ade0
 F test/index4.test ab92e736d5946840236cd61ac3191f91a7856bf6
 F test/index5.test 8621491915800ec274609e42e02a97d67e9b13e7
-F test/index6.test f9359034f186a531af03ca803aa59ff50924b8dddc21c154b4c68a26793e06b8
+F test/index6.test a6cf96bb70bf57b2221e102060a18af46bc366f704722f410d6f42c13a75534a
 F test/index7.test be02a0b4e53ac4ad7db4995fe02b428597a2e104c4f574b0d4b2f6b082e96b28
 F test/index8.test bc2e3db70e8e62459aaa1bd7e4a9b39664f8f9d7
 F test/index9.test 0aa3e509dddf81f93380396e40e9bb386904c1054924ba8fa9bcdfe85a8e7721
@@ -1825,7 +1825,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P a194e53670e25a48c2bb51b54755abff88ed6ae2596c5858fb4aac16cb452bdf
-R 1eaf665d4f98aadb9f3ca769035a618a
+P 0ba6d709b50d92db1542f2ff30535a80184b00dadf759d51e5cae7a6e37b1764
+R eed45e78e88ca93286620dd3277355ae
 U dan
-Z c47b7568ffb329afbb8bfb66234d0550
+Z 697971a2288076e83fc4830e959d8147
diff --git a/manifest.uuid b/manifest.uuid
index 75e75c75a5..a33bef3c01 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-0ba6d709b50d92db1542f2ff30535a80184b00dadf759d51e5cae7a6e37b1764
\ No newline at end of file
+1b24303220b7b4f59520176a0150fc619c668865450b4fdaa9ce4113a56e9687
\ No newline at end of file
diff --git a/src/expr.c b/src/expr.c
index c69fb4a565..05b50c1e62 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -4948,6 +4948,7 @@ int sqlite3ExprImpliesExpr(Parse *pParse, Expr *pE1, Expr *pE2, int iTab){
    && pE1->op!=TK_IS
    && pE1->op!=TK_ISNOT
    && pE1->op!=TK_OR
+   && pE1->op!=TK_CASE
   ){
     Expr *pX = sqlite3ExprSkipCollate(pE1->pLeft);
     testcase( pX!=pE1->pLeft );
diff --git a/test/index6.test b/test/index6.test
index db75ffb522..b271954b28 100644
--- a/test/index6.test
+++ b/test/index6.test
@@ -433,5 +433,9 @@ do_execsql_test index6-14.1 {
   SELECT * FROM t0 WHERE t0.c0 IS NOT 1;
 } {{} row}
 
+do_execsql_test index6-14.2 {
+  SELECT * FROM t0 WHERE CASE c0 WHEN 0 THEN 0 ELSE 1 END;
+} {{} row}
+
 finish_test