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Overview
| Comment: | Small performance optimization in sqlite3WhereExprUsage(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | defer-where-subqueries |
| Files: | files | file ages | folders |
| SHA3-256: |
38edc6770e54e456500e77389d42fdf3 |
| User & Date: | drh 2017-07-10 15:26:09 |
Context
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2017-07-10
| ||
| 16:38 | Additional debugging Noop-comment in the constraint generator when wheretrace is enabled. Closed-Leaf check-in: 0ca7474f user: drh tags: defer-where-subqueries | |
| 15:26 | Small performance optimization in sqlite3WhereExprUsage(). check-in: 38edc677 user: drh tags: defer-where-subqueries | |
| 15:17 | Fix another problem on this branch. check-in: a4fc9811 user: dan tags: defer-where-subqueries | |
Changes
Changes to src/whereexpr.c.
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 |
Bitmask mask;
if( p==0 ) return 0;
if( p->op==TK_COLUMN ){
return sqlite3WhereGetMask(pMaskSet, p->iTable);
}
mask = (p->op==TK_IF_NULL_ROW) ? sqlite3WhereGetMask(pMaskSet, p->iTable) : 0;
assert( !ExprHasProperty(p, EP_TokenOnly) );
if( p->pRight ) mask |= sqlite3WhereExprUsage(pMaskSet, p->pRight);
if( p->pLeft ) mask |= sqlite3WhereExprUsage(pMaskSet, p->pLeft);
if( ExprHasProperty(p, EP_xIsSelect) ){
if( ExprHasProperty(p, EP_VarSelect) ) pMaskSet->bVarSelect = 1;
mask |= exprSelectUsage(pMaskSet, p->x.pSelect);
}else if( p->x.pList ){
mask |= sqlite3WhereExprListUsage(pMaskSet, p->x.pList);
}
return mask;
}
|
| > | > | |
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 |
Bitmask mask;
if( p==0 ) return 0;
if( p->op==TK_COLUMN ){
return sqlite3WhereGetMask(pMaskSet, p->iTable);
}
mask = (p->op==TK_IF_NULL_ROW) ? sqlite3WhereGetMask(pMaskSet, p->iTable) : 0;
assert( !ExprHasProperty(p, EP_TokenOnly) );
if( p->pLeft ) mask |= sqlite3WhereExprUsage(pMaskSet, p->pLeft);
if( p->pRight ){
mask |= sqlite3WhereExprUsage(pMaskSet, p->pRight);
assert( p->x.pList==0 );
}else if( ExprHasProperty(p, EP_xIsSelect) ){
if( ExprHasProperty(p, EP_VarSelect) ) pMaskSet->bVarSelect = 1;
mask |= exprSelectUsage(pMaskSet, p->x.pSelect);
}else if( p->x.pList ){
mask |= sqlite3WhereExprListUsage(pMaskSet, p->x.pList);
}
return mask;
}
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