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Overview
| Comment: | Make sure the where.c query planner never reports that the number of ORDER BY terms that are satisfied by indices is negative. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | orderby-planning |
| Files: | files | file ages | folders |
| SHA1: |
b186d8d15a10d5e8fcae9ae72e8624d7 |
| User & Date: | drh 2014-03-19 14:30:55.491 |
Context
|
2014-03-19
| ||
| 15:17 | Avoid reusing temporary registers in co-routines when doing block-sorting. (check-in: 463d921b51 user: drh tags: orderby-planning) | |
| 14:30 | Make sure the where.c query planner never reports that the number of ORDER BY terms that are satisfied by indices is negative. (check-in: b186d8d15a user: drh tags: orderby-planning) | |
| 14:10 | First attempt at getting block-sort to work. This is an incremental check-in. There are many problems still to be worked out. (check-in: 59742dd4c5 user: drh tags: orderby-planning) | |
Changes
Changes to src/where.c.
| ︙ | ︙ | |||
5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 |
if( pWInfo->pOrderBy ){
if( pWInfo->wctrlFlags & WHERE_DISTINCTBY ){
if( pFrom->isOrdered==pWInfo->pOrderBy->nExpr ){
pWInfo->eDistinct = WHERE_DISTINCT_ORDERED;
}
}else{
pWInfo->nOBSat = pFrom->isOrdered;
pWInfo->revMask = pFrom->revLoop;
}
}
pWInfo->nRowOut = pFrom->nRow;
/* Free temporary memory and return success */
sqlite3DbFree(db, pSpace);
| > | 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 |
if( pWInfo->pOrderBy ){
if( pWInfo->wctrlFlags & WHERE_DISTINCTBY ){
if( pFrom->isOrdered==pWInfo->pOrderBy->nExpr ){
pWInfo->eDistinct = WHERE_DISTINCT_ORDERED;
}
}else{
pWInfo->nOBSat = pFrom->isOrdered;
if( pWInfo->nOBSat<0 ) pWInfo->nOBSat = 0;
pWInfo->revMask = pFrom->revLoop;
}
}
pWInfo->nRowOut = pFrom->nRow;
/* Free temporary memory and return success */
sqlite3DbFree(db, pSpace);
|
| ︙ | ︙ |