diff options
Diffstat (limited to 'storage/maria/ma_blockrec.c')
| -rw-r--r-- | storage/maria/ma_blockrec.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/storage/maria/ma_blockrec.c b/storage/maria/ma_blockrec.c index 58791418998..31026d99b68 100644 --- a/storage/maria/ma_blockrec.c +++ b/storage/maria/ma_blockrec.c @@ -53,10 +53,10 @@ Page header: LSN 7 bytes Log position for last page change - PAGE_TYPE 1 uchar 1 for head / 2 for tail / 3 for blob + PAGE_TYPE 1 uchar 0 unalloced / 1 for head / 2 for tail / 3 for blob DIR_COUNT 1 uchar Number of row/tail entries on page FREE_DIR_LINK 1 uchar Pointer to first free director entry or 255 if no - empty space 2 bytes Empty space on page + empty space 2 bytes Bytes of empty space on page The most significant bit in PAGE_TYPE is set to 1 if the data on the page can be compacted to get more space. (PAGE_CAN_BE_COMPACTED) @@ -5122,11 +5122,19 @@ int _ma_read_block_record(MARIA_HA *info, uchar *record, info->buff, share->page_type, PAGECACHE_LOCK_LEFT_UNLOCKED, 0))) DBUG_RETURN(my_errno); - DBUG_ASSERT((buff[PAGE_TYPE_OFFSET] & PAGE_TYPE_MASK) == HEAD_PAGE); - if (!(data= get_record_position(buff, block_size, offset, &end_of_data))) + + /* + Unallocated page access can happen if this is an access to a page where + all rows where deleted as part of this statement. + */ + DBUG_ASSERT((buff[PAGE_TYPE_OFFSET] & PAGE_TYPE_MASK) == HEAD_PAGE || + (buff[PAGE_TYPE_OFFSET] & PAGE_TYPE_MASK) == UNALLOCATED_PAGE); + + if (((buff[PAGE_TYPE_OFFSET] & PAGE_TYPE_MASK) == UNALLOCATED_PAGE) || + !(data= get_record_position(buff, block_size, offset, &end_of_data))) { DBUG_ASSERT(!maria_assert_if_crashed_table); - DBUG_PRINT("error", ("Wrong directory entry in data block")); + DBUG_PRINT("warning", ("Wrong directory entry in data block")); my_errno= HA_ERR_RECORD_DELETED; /* File crashed */ DBUG_RETURN(HA_ERR_RECORD_DELETED); } |