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Overview
| Comment: | The VDBE aggregate functions use an in-memory btree instead of a disk-based btree for improved performance. (CVS 1579) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
8029f1e465b900215acdff48c8eefb53 |
| User & Date: | drh 2004-06-12 20:42:30 |
Context
|
2004-06-13
| ||
| 00:54 | More speed improvements. (CVS 1580) check-in: c5ebc1c0 user: drh tags: trunk | |
|
2004-06-12
| ||
| 20:42 | The VDBE aggregate functions use an in-memory btree instead of a disk-based btree for improved performance. (CVS 1579) check-in: 8029f1e4 user: drh tags: trunk | |
| 20:12 | Speed up in the handling of VDBE cursors. (CVS 1578) check-in: e42316f5 user: drh tags: trunk | |
Changes
Changes to src/vdbeaux.c.
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 |
** information.
**
** If db is NULL, then close the temporary btree if it is open.
*/
if( db ){
if( !pAgg->pBtree ){
assert( pAgg->nTab==0 );
rc = sqlite3BtreeFactory(db, 0, 0, TEMP_PAGES, &pAgg->pBtree);
if( rc!=SQLITE_OK ) return rc;
sqlite3BtreeBeginTrans(pAgg->pBtree, 1, 0);
rc = sqlite3BtreeCreateTable(pAgg->pBtree, &pAgg->nTab, 0);
if( rc!=SQLITE_OK ) return rc;
}
assert( pAgg->nTab!=0 );
|
| |
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 |
** information.
**
** If db is NULL, then close the temporary btree if it is open.
*/
if( db ){
if( !pAgg->pBtree ){
assert( pAgg->nTab==0 );
rc = sqlite3BtreeFactory(db, ":memory:", 0, TEMP_PAGES, &pAgg->pBtree);
if( rc!=SQLITE_OK ) return rc;
sqlite3BtreeBeginTrans(pAgg->pBtree, 1, 0);
rc = sqlite3BtreeCreateTable(pAgg->pBtree, &pAgg->nTab, 0);
if( rc!=SQLITE_OK ) return rc;
}
assert( pAgg->nTab!=0 );
|