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Avoid unnecessary memory allocations for aiMap in codeEqualityConstraints.

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FossilOrigin-Name: 70319c3d76abd1e403fcf2a62668736b92a5f3d5
This commit is contained in:
drh 2016-09-06 17:13:40 +00:00
parent aaf8a0643e
commit c7a77ae1c6
3 changed files with 10 additions and 12 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Avoid\sa\sNULL\spointer\sderef\sin\scodeAllEqualityConstraints()\sfollowing\san\sOOM.
D 2016-09-06T16:53:53.727
C Avoid\sunnecessary\smemory\sallocations\sfor\saiMap\sin\scodeEqualityConstraints.
D 2016-09-06T17:13:40.420
F Makefile.in cfd8fb987cd7a6af046daa87daa146d5aad0e088
F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
F Makefile.msc 5017381e4853b1472e01d5bb926be1268eba429c
@ -467,7 +467,7 @@ F src/wal.h 6dd221ed384afdc204bc61e25c23ef7fd5a511f2
F src/walker.c 2d2cc7fb0f320f7f415215d7247f3c584141ac09
F src/where.c 48d705e5196a0611a7be90698eade455ee238536
F src/whereInt.h 14dd243e13b81cbb0a66063d38b70f93a7d6e613
F src/wherecode.c 4bd3e4c3c9f441a9d1fbd8fb13528f9c1c2c8528
F src/wherecode.c b0d4febdd9de07ad68faadeacb30df9785f9b979
F src/whereexpr.c c5ec87e234faf62ac2d4e7f7ce18fb1f4bd475ff
F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
F test/affinity2.test a6d901b436328bd67a79b41bb0ac2663918fe3bd
@ -1522,7 +1522,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P bd5a342008575bf66f63881a0bebf43741f2a67b
R fcb091661f586511d74c9857242646c5
P c6e528c1c0f17c69c7745b018afa36694118258f
R 71337de042abb55d5e21dbccb2bcc3d7
U drh
Z 30f14ba82e1e5f327ee9c3b7b6a25371
Z ad68562def745ab96bb3491072f1a7f4

2
manifest.uuid
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@ -1 +1 @@
c6e528c1c0f17c69c7745b018afa36694118258f
70319c3d76abd1e403fcf2a62668736b92a5f3d5

8
src/wherecode.c
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@ -442,11 +442,6 @@ static int codeEqualityTerm(
if( ALWAYS(pLoop->aLTerm[i]) && pLoop->aLTerm[i]->pExpr==pX ) nEq++;
}
if( nEq>1 ){
aiMap = (int*)sqlite3DbMallocZero(pParse->db, sizeof(int) * nEq);
if( !aiMap ) return 0;
}
if( (pX->flags & EP_xIsSelect)==0 || pX->x.pSelect->pEList->nExpr==1 ){
eType = sqlite3FindInIndex(pParse, pX, IN_INDEX_LOOP, 0, 0);
}else{
@ -475,9 +470,12 @@ static int codeEqualityTerm(
pX->pLeft = pLhs->a[0].pExpr;
}else{
pLeft->x.pList = pLhs;
aiMap = (int*)sqlite3DbMallocZero(pParse->db, sizeof(int) * nEq);
testcase( aiMap==0 );
}
pX->x.pSelect->pEList = pRhs;
eType = sqlite3FindInIndex(pParse, pX, IN_INDEX_LOOP, 0, aiMap);
testcase( aiMap!=0 && aiMap[0]!=0 );
pX->x.pSelect->pEList = pOrigRhs;
pLeft->x.pList = pOrigLhs;
pX->pLeft = pLeft;