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Overview
| Comment: | Remove some unnecessary code from vdbesort.c. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | sorter-opt |
| Files: | files | file ages | folders |
| SHA1: |
b58191e91736b1d978db4127f22867df |
| User & Date: | dan 2015-03-30 09:58:38 |
Context
|
2015-03-30
| ||
| 12:06 | Improve performance of multi-field sorts where the first field has a low cardinality. check-in: 601e7b6b user: dan tags: sorter-opt | |
| 09:58 | Remove some unnecessary code from vdbesort.c. check-in: b58191e9 user: dan tags: sorter-opt | |
|
2015-03-28
| ||
| 19:56 | Further optimizations for sorting records that begin with integer or text values. check-in: 24fe9f25 user: dan tags: sorter-opt | |
Changes
Changes to src/vdbesort.c.
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pTask->pUnpacked = sqlite3VdbeAllocUnpackedRecord(
pTask->pSorter->pKeyInfo, 0, 0, &pFree
);
assert( pTask->pUnpacked==(UnpackedRecord*)pFree );
if( pFree==0 ) return SQLITE_NOMEM;
pTask->pUnpacked->nField = pTask->pSorter->pKeyInfo->nField;
pTask->pUnpacked->errCode = 0;
if( pTask->pSorter->pKeyInfo->aSortOrder[0] ){
pTask->pUnpacked->r1 = 1;
pTask->pUnpacked->r2 = -1;
}else{
pTask->pUnpacked->r1 = -1;
pTask->pUnpacked->r2 = 1;
}
}
return SQLITE_OK;
}
/*
** Merge the two sorted lists p1 and p2 into a single list.
|
< < < < < < < |
1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 |
pTask->pUnpacked = sqlite3VdbeAllocUnpackedRecord(
pTask->pSorter->pKeyInfo, 0, 0, &pFree
);
assert( pTask->pUnpacked==(UnpackedRecord*)pFree );
if( pFree==0 ) return SQLITE_NOMEM;
pTask->pUnpacked->nField = pTask->pSorter->pKeyInfo->nField;
pTask->pUnpacked->errCode = 0;
}
return SQLITE_OK;
}
/*
** Merge the two sorted lists p1 and p2 into a single list.
|