Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Not a fault after all, rather a testing mistake. Move this change back to trunk. Was: Avoid an unnecessary OP_Move operation for expression subqueries. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
2a74129a21f9745f1363f844807e2d10 |
| User & Date: | drh 2014-08-29 14:20:46.550 |
| Original Comment: | Note a fault after all, rather a testing mistake. Move this change back to trunk. Was: Avoid an unnecessary OP_Move operation for expression subqueries. |
References
|
2016-01-13
| ||
| 15:00 | • New ticket [cb3aa0641d] Incorrect result from a subquery containing over-constrainted ORDER BY. (artifact: ac020a732f user: drh) | |
Context
|
2016-01-13
| ||
| 17:50 | When the block sorting optimization is used in a scalar subquery, be sure to exit the loop as soon as the first valid output row is received. Fix for ticket [cb3aa0641d9a4]. (check-in: cdbb0947f9 user: drh tags: trunk) | |
|
2014-08-30
| ||
| 15:49 | In the command-line shell, added options --lookaside, --pagecache, and --scratch used to configure auxiliary memories. (check-in: f61db04be4 user: drh tags: trunk) | |
|
2014-08-29
| ||
| 14:40 | Merge recent performance enhancements from trunk onto the threads branch. (check-in: 35c44a3c73 user: drh tags: threads) | |
| 14:20 | Not a fault after all, rather a testing mistake. Move this change back to trunk. Was: Avoid an unnecessary OP_Move operation for expression subqueries. (check-in: 2a74129a21 user: drh tags: trunk) | |
| 12:29 | Contains a fault. Was: Avoid an unnecessary OP_Move operation for expression subqueries. (Closed-Leaf check-in: 462f42af52 user: drh tags: mistake) | |
|
2014-08-28
| ||
| 19:38 | Improved WHERETRACE messages for the estimated output row reductions from range scans. (check-in: fdd478bb11 user: drh tags: trunk) | |
Changes
Changes to src/expr.c.
| ︙ | ︙ | |||
1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 |
assert( pExpr->op==TK_EXISTS || pExpr->op==TK_SELECT );
assert( ExprHasProperty(pExpr, EP_xIsSelect) );
pSel = pExpr->x.pSelect;
sqlite3SelectDestInit(&dest, 0, ++pParse->nMem);
if( pExpr->op==TK_SELECT ){
dest.eDest = SRT_Mem;
sqlite3VdbeAddOp2(v, OP_Null, 0, dest.iSDParm);
VdbeComment((v, "Init subquery result"));
}else{
dest.eDest = SRT_Exists;
sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iSDParm);
VdbeComment((v, "Init EXISTS result"));
}
| > | 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 |
assert( pExpr->op==TK_EXISTS || pExpr->op==TK_SELECT );
assert( ExprHasProperty(pExpr, EP_xIsSelect) );
pSel = pExpr->x.pSelect;
sqlite3SelectDestInit(&dest, 0, ++pParse->nMem);
if( pExpr->op==TK_SELECT ){
dest.eDest = SRT_Mem;
dest.iSdst = dest.iSDParm;
sqlite3VdbeAddOp2(v, OP_Null, 0, dest.iSDParm);
VdbeComment((v, "Init subquery result"));
}else{
dest.eDest = SRT_Exists;
sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iSDParm);
VdbeComment((v, "Init EXISTS result"));
}
|
| ︙ | ︙ |
Changes to src/select.c.
| ︙ | ︙ | |||
825 826 827 828 829 830 831 |
** of the scan loop.
*/
case SRT_Mem: {
assert( nResultCol==1 );
if( pSort ){
pushOntoSorter(pParse, pSort, p, regResult);
}else{
| | | 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 |
** of the scan loop.
*/
case SRT_Mem: {
assert( nResultCol==1 );
if( pSort ){
pushOntoSorter(pParse, pSort, p, regResult);
}else{
assert( regResult==iParm );
/* The LIMIT clause will jump out of the loop for us */
}
break;
}
#endif /* #ifndef SQLITE_OMIT_SUBQUERY */
case SRT_Coroutine: /* Send data to a co-routine */
|
| ︙ | ︙ |