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Overview
| Comment: | The BtCursor.info fields are only valid if info.nSize!=0. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | cell-overwrite-prototype |
| Files: | files | file ages | folders |
| SHA3-256: | 54c537eead5b08104cfaf0d5b1e2706e |
| User & Date: | drh 2018-05-03 14:07:18 |
Context
|
2018-05-03
| ||
| 16:56 | Fix various error handling conditions on the cell overwrite optimization. Fix a test case so that it works with the new optimization. check-in: f89b54f4 user: drh tags: cell-overwrite-prototype | |
| 14:07 | The BtCursor.info fields are only valid if info.nSize!=0. check-in: 54c537ee user: drh tags: cell-overwrite-prototype | |
| 13:56 | Add more corruption checking to the cell overwrite logic. check-in: 58d14afe user: drh tags: cell-overwrite-prototype | |
Changes
Changes to src/btree.c.
8331 8332 8333 8334 8335 8336 8337 8338 8339 8340 8341 8342 8343 8344 8345 |
/* If the cursor is currently on the last row and we are appending a
** new row onto the end, set the "loc" to avoid an unnecessary
** btreeMoveto() call */
if( (pCur->curFlags&BTCF_ValidNKey)!=0 && pX->nKey==pCur->info.nKey ){
/* The current is currently pointing to the entry that is to be
** overwritten */
if( pCur->info.nPayload==pX->nData+pX->nZero ){
return btreeOverwriteCell(pCur, pX);
}
loc = 0;
}else if( loc==0 ){
rc = sqlite3BtreeMovetoUnpacked(pCur, 0, pX->nKey, flags!=0, &loc);
if( rc ) return rc;
}
|
| |
8331 8332 8333 8334 8335 8336 8337 8338 8339 8340 8341 8342 8343 8344 8345 |
/* If the cursor is currently on the last row and we are appending a
** new row onto the end, set the "loc" to avoid an unnecessary
** btreeMoveto() call */
if( (pCur->curFlags&BTCF_ValidNKey)!=0 && pX->nKey==pCur->info.nKey ){
/* The current is currently pointing to the entry that is to be
** overwritten */
if( pCur->info.nSize!=0 && pCur->info.nPayload==pX->nData+pX->nZero ){
return btreeOverwriteCell(pCur, pX);
}
loc = 0;
}else if( loc==0 ){
rc = sqlite3BtreeMovetoUnpacked(pCur, 0, pX->nKey, flags!=0, &loc);
if( rc ) return rc;
}
|