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Fix the transitive constraint processing to only allow transitivity if the

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operands of the == or IS operator have compatible affinities.

FossilOrigin-Name: a46a247fbcfe6e63b12cef31353835295a650c9b
This commit is contained in:
drh
2015-05-16 19:17:17 +00:00
parent e655a0e34e
commit ea19cc10f5
3 changed files with 28 additions and 10 deletions
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15
manifest
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@@ -1,5 +1,5 @@
C Fix\sa\stypo\sin\sa\scomment.\s\sNo\schanges\sto\scode. C Fix\sthe\stransitive\sconstraint\sprocessing\sto\sonly\sallow\stransitivity\sif\sthe\noperands\sof\sthe\s==\sor\sIS\soperator\shave\scompatible\saffinities.
D 2015-05-16T18:31:44.355 D 2015-05-16T19:17:17.907
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in edfc69769e613a6359c42c06ea1d42c3bece1736 F Makefile.in edfc69769e613a6359c42c06ea1d42c3bece1736
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -307,7 +307,7 @@ F src/vxworks.h c18586c8edc1bddbc15c004fa16aeb1e1342b4fb
F src/wal.c ce2cb2d06faab54d1bce3e739bec79e063dd9113 F src/wal.c ce2cb2d06faab54d1bce3e739bec79e063dd9113
F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
F src/walker.c c253b95b4ee44b21c406e2a1052636c31ea27804 F src/walker.c c253b95b4ee44b21c406e2a1052636c31ea27804
F src/where.c 430ae75d8850ea9e3c7ceba8e05adb105300ddb4 F src/where.c 58c0161b81ec25bf7d221baf445d871ab98d9cce
F src/whereInt.h a6f5a762bc1b4b1c76e1cea79976b437ac35a435 F src/whereInt.h a6f5a762bc1b4b1c76e1cea79976b437ac35a435
F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
@@ -1258,7 +1258,10 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
P 2c1039d454e359b0eec3db2d4201b4ba7e543052 P ee4b74250ad7a4061421d44b490cb79f649b3720
R c540749c837ccfa9e646ed2d9c9c0493 R 1beebe1e9084926919d5e75f3ab331f9
T *branch * transitive-constraints
T *sym-transitive-constraints *
T -sym-trunk *
U drh U drh
Z 98006a9bc56782e174c039d9f287e37a Z 9dd679bea28da23301e6184e5fdbcc54

2
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@@ -1 +1 @@
ee4b74250ad7a4061421d44b490cb79f649b3720 a46a247fbcfe6e63b12cef31353835295a650c9b

21
src/where.c
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@@ -1276,16 +1276,31 @@ static void exprAnalyze(
if( idxNew==0 ) return; if( idxNew==0 ) return;
pNew = &pWC->a[idxNew]; pNew = &pWC->a[idxNew];
markTermAsChild(pWC, idxNew, idxTerm); markTermAsChild(pWC, idxNew, idxTerm);
if( op==TK_IS ) pNew->wtFlags |= TERM_IS;
pTerm = &pWC->a[idxTerm]; pTerm = &pWC->a[idxTerm];
pTerm->wtFlags |= TERM_COPIED; pTerm->wtFlags |= TERM_COPIED;
/* Expressions of the form "A==B" or "A IS B" might be candidates
** for propagating constraints via the transitive property. In other
** words: "A==B AND B==$xyz" implies "A==$xyz". If this term
** qualifies, mark it with WO_EQUIV. Necessary preconditions:
** 1. The term is not in the ON clause of a LEFT JOIN
** 2. The affinities of A and B must be compatible
** 3. The SQLITE_Transitive optimization must be enabled
*/
if( (op==TK_EQ || op==TK_IS) if( (op==TK_EQ || op==TK_IS)
&& !ExprHasProperty(pExpr, EP_FromJoin) && !ExprHasProperty(pExpr, EP_FromJoin)
&& OptimizationEnabled(db, SQLITE_Transitive) && OptimizationEnabled(db, SQLITE_Transitive)
){ ){
pTerm->eOperator |= WO_EQUIV; char aff1 = sqlite3ExprAffinity(pDup->pLeft);
eExtraOp = WO_EQUIV; char aff2 = sqlite3ExprAffinity(pDup->pRight);
if( aff1==aff2
|| (sqlite3IsNumericAffinity(aff1) && sqlite3IsNumericAffinity(aff2))
){
pTerm->eOperator |= WO_EQUIV;
eExtraOp = WO_EQUIV;
}
} }
if( op==TK_IS ) pNew->wtFlags |= TERM_IS;
}else{ }else{
pDup = pExpr; pDup = pExpr;
pNew = pTerm; pNew = pTerm;