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Overview
| Comment: | Additional debugging Noop-comment in the constraint generator when wheretrace is enabled. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | defer-where-subqueries |
| Files: | files | file ages | folders |
| SHA3-256: |
0ca7474f05e9f27f53f8c71f5a3ff999 |
| User & Date: | drh 2017-07-10 16:38:14.687 |
Context
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2017-07-10
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| 17:00 | When multiple constraints need to be evaluated for a row, do any constraints that involve correlated subqueries last. Hence, the priority is index-covered constraints first, correlated subquery constraints last, and all others in the middle. This is a follow-on and improvement to the push-down optimization of check-in [d7bb79ed]. (check-in: c4cb90487f user: drh tags: trunk) | |
| 16:38 | Additional debugging Noop-comment in the constraint generator when wheretrace is enabled. (Closed-Leaf check-in: 0ca7474f05 user: drh tags: defer-where-subqueries) | |
| 15:26 | Small performance optimization in sqlite3WhereExprUsage(). (check-in: 38edc6770e user: drh tags: defer-where-subqueries) | |
Changes
Changes to src/wherecode.c.
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#else
u32 x = pLevel->iLikeRepCntr;
assert( x>0 );
skipLikeAddr = sqlite3VdbeAddOp1(v, (x&1)?OP_IfNot:OP_If, (int)(x>>1));
VdbeCoverage(v);
#endif
}
sqlite3ExprIfFalse(pParse, pE, addrCont, SQLITE_JUMPIFNULL);
if( skipLikeAddr ) sqlite3VdbeJumpHere(v, skipLikeAddr);
pTerm->wtFlags |= TERM_CODED;
}
iLoop = iNext;
}while( iLoop>0 );
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#else
u32 x = pLevel->iLikeRepCntr;
assert( x>0 );
skipLikeAddr = sqlite3VdbeAddOp1(v, (x&1)?OP_IfNot:OP_If, (int)(x>>1));
VdbeCoverage(v);
#endif
}
#ifdef WHERETRACE_ENABLED /* 0xffff */
if( sqlite3WhereTrace ){
VdbeNoopComment((v, "WhereTerm[%d] (%p) priority=%d",
pWC->nTerm-j, pTerm, iLoop));
}
#endif
sqlite3ExprIfFalse(pParse, pE, addrCont, SQLITE_JUMPIFNULL);
if( skipLikeAddr ) sqlite3VdbeJumpHere(v, skipLikeAddr);
pTerm->wtFlags |= TERM_CODED;
}
iLoop = iNext;
}while( iLoop>0 );
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