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Overview
| Comment: | When analyzing the right-hand side of IN operators to see if the IN operator can work with an index, be sure to decend into nested subqueries. Fix for ticket [1a1308d2538d7] |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
0156f10e23daca0e2504cd293a67ed02 |
| User & Date: | drh 2011-09-16 17:43:06 |
Context
|
2011-09-16
| ||
| 19:04 | Remove unreachable branches from the previous change. Add additional test cases. check-in: cf51ef8a user: drh tags: trunk | |
| 17:43 | When analyzing the right-hand side of IN operators to see if the IN operator can work with an index, be sure to decend into nested subqueries. Fix for ticket [1a1308d2538d7] check-in: 0156f10e user: drh tags: trunk | |
| 16:00 | Further streamlining of the subquery materializer. New test cases for ticket [002caede898a] check-in: ff8b76b2 user: drh tags: trunk | |
Changes
Changes to src/where.c.
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}
}
return mask;
}
static Bitmask exprSelectTableUsage(WhereMaskSet *pMaskSet, Select *pS){
Bitmask mask = 0;
while( pS ){
mask |= exprListTableUsage(pMaskSet, pS->pEList);
mask |= exprListTableUsage(pMaskSet, pS->pGroupBy);
mask |= exprListTableUsage(pMaskSet, pS->pOrderBy);
mask |= exprTableUsage(pMaskSet, pS->pWhere);
mask |= exprTableUsage(pMaskSet, pS->pHaving);
pS = pS->pPrior;
}
return mask;
}
/*
** Return TRUE if the given operator is one of the operators that is
|
> > > > > > > > |
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}
}
return mask;
}
static Bitmask exprSelectTableUsage(WhereMaskSet *pMaskSet, Select *pS){
Bitmask mask = 0;
while( pS ){
SrcList *pSrc;
mask |= exprListTableUsage(pMaskSet, pS->pEList);
mask |= exprListTableUsage(pMaskSet, pS->pGroupBy);
mask |= exprListTableUsage(pMaskSet, pS->pOrderBy);
mask |= exprTableUsage(pMaskSet, pS->pWhere);
mask |= exprTableUsage(pMaskSet, pS->pHaving);
if( (pSrc = pS->pSrc)!=0 ){
int i;
for(i=0; i<pSrc->nSrc; i++){
mask |= exprSelectTableUsage(pMaskSet, pSrc->a[i].pSelect);
mask |= exprTableUsage(pMaskSet, pSrc->a[i].pOn);
}
}
pS = pS->pPrior;
}
return mask;
}
/*
** Return TRUE if the given operator is one of the operators that is
|
Changes to test/tkt-31338dca7e.test.
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WHERE (a=1 AND h=4)
OR (b IN (
SELECT x+a FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
GROUP BY e
));
}
} {4 2 4 3 4 {} 4 99 101 3 4 {}}
finish_test
|
> > > > > > > > > > > > |
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WHERE (a=1 AND h=4)
OR (b IN (
SELECT x+a FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
GROUP BY e
));
}
} {4 2 4 3 4 {} 4 99 101 3 4 {}}
do_test tkt-31338-3.7 {
db eval {
SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
WHERE (a=1 AND h=4)
OR (b IN (
SELECT x FROM (SELECT e+f+a AS x, e FROM t2 ORDER BY 1 LIMIT 2)
GROUP BY e
));
}
} {4 2 4 3 4 {} 4 99 101 3 4 {}}
finish_test
|