diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/btree.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/btree.c b/src/btree.c index e18240fe2..c54433c8e 100644 --- a/src/btree.c +++ b/src/btree.c @@ -8173,12 +8173,18 @@ int sqlite3BtreeInsert( memcpy(newCell, oldCell, 4); } rc = clearCell(pPage, oldCell, &info); - if( info.nSize==szNew && info.nLocal==info.nPayload ){ + if( info.nSize==szNew && info.nLocal==info.nPayload + && (!ISAUTOVACUUM || szNew<pPage->minLocal) + ){ /* Overwrite the old cell with the new if they are the same size. ** We could also try to do this if the old cell is smaller, then add ** the leftover space to the free list. But experiments show that ** doing that is no faster then skipping this optimization and just - ** calling dropCell() and insertCell(). */ + ** calling dropCell() and insertCell(). + ** + ** This optimization cannot be used on an autovacuum database if the + ** new entry uses overflow pages, as the insertCell() call below is + ** necessary to add the PTRMAP_OVERFLOW1 pointer-map entry. */ assert( rc==SQLITE_OK ); /* clearCell never fails when nLocal==nPayload */ if( oldCell+szNew > pPage->aDataEnd ) return SQLITE_CORRUPT_BKPT; memcpy(oldCell, newCell, szNew); |