mirror of https://github.com/sqlite/sqlite
Enhance the query planner so that IS and IS NULL operators are able to drive
an index on a LEFT OUTER JOIN. FossilOrigin-Name: c648539b52ca28c0b2cb61208e2c32b1d29626a1
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@ -1,5 +1,5 @@
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C Updates\sfor\sthe\sMSVC\smakefiles.
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D 2016-03-30T16:23:06.801
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C Enhance\sthe\squery\splanner\sso\sthat\sIS\sand\sIS\sNULL\soperators\sare\sable\sto\sdrive\nan\sindex\son\sa\sLEFT\sOUTER\sJOIN.
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D 2016-03-31T20:40:28.501
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F Makefile.in e812bb732d7af01baa09f1278bd4f4a2e3a09449
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F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
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F Makefile.msc cde766eb7c27a7ca42000e66c5f0c37a17a05998
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@ -453,7 +453,7 @@ F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
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F src/wal.c 10deb6b43887662691e5f53d10b3c171c401169b
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F src/wal.h 2f7c831cf3b071fa548bf2d5cac640846a7ff19c
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F src/walker.c 0f142b5bd3ed2041fc52d773880748b212e63354
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F src/where.c fe7925faafbe9a458972035c0bb4753d672f04ed
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F src/where.c 99cc6270fc3915201e2a90bbac3768f007a89c44
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F src/whereInt.h 93297d56edd137b7ea004490690fb6e2ce028a34
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F src/wherecode.c 863aedf086131743763c1960637fde904eadc442
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F src/whereexpr.c fb87944b1254234e5bba671aaf6dee476241506a
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@ -1480,7 +1480,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
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F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
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F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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P 64d75cbe2c45af67124fa7ce5688d91cc6ddb755
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R 77269b95e931ac6cca96bcd2fa718a38
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U mistachkin
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Z 37f983898af724eda9f571ecd8a4d862
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P 7cf0cab730e2d570c82dd789279ad6501ac598c8
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R 208d59c6eb413bba3e66e70033cda029
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U drh
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Z d36ae30a27c8e5f7b17afdd33be692aa
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@ -1 +1 @@
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7cf0cab730e2d570c82dd789279ad6501ac598c8
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c648539b52ca28c0b2cb61208e2c32b1d29626a1
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src/where.c
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src/where.c
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@ -2201,8 +2201,6 @@ static int whereLoopAddBtreeIndex(
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assert( (pNew->wsFlags & WHERE_TOP_LIMIT)==0 );
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if( pNew->wsFlags & WHERE_BTM_LIMIT ){
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opMask = WO_LT|WO_LE;
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}else if( /*pProbe->tnum<=0 ||*/ (pSrc->fg.jointype & JT_LEFT)!=0 ){
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opMask = WO_EQ|WO_IN|WO_GT|WO_GE|WO_LT|WO_LE;
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}else{
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opMask = WO_EQ|WO_IN|WO_GT|WO_GE|WO_LT|WO_LE|WO_ISNULL|WO_IS;
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}
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@ -2240,6 +2238,18 @@ static int whereLoopAddBtreeIndex(
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** to mix with a lower range bound from some other source */
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if( pTerm->wtFlags & TERM_LIKEOPT && pTerm->eOperator==WO_LT ) continue;
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/* Do not allow IS constraints from the WHERE clause to be used by the
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** right table of a LEFT JOIN. Only constraints in the ON clause are
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** allowed */
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if( (pSrc->fg.jointype & JT_LEFT)!=0
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&& !ExprHasProperty(pTerm->pExpr, EP_FromJoin)
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&& (eOp & (WO_IS|WO_ISNULL))!=0
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){
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testcase( eOp & WO_IS );
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testcase( eOp & WO_ISNULL );
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continue;
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}
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pNew->wsFlags = saved_wsFlags;
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pNew->u.btree.nEq = saved_nEq;
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pNew->nLTerm = saved_nLTerm;
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