diff options
Diffstat (limited to 'storage/myisam/mi_rprev.c')
| -rw-r--r-- | storage/myisam/mi_rprev.c | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/storage/myisam/mi_rprev.c b/storage/myisam/mi_rprev.c index d1407012590..93bd224bd56 100644 --- a/storage/myisam/mi_rprev.c +++ b/storage/myisam/mi_rprev.c @@ -51,22 +51,36 @@ int mi_rprev(MI_INFO *info, uchar *buf, int inx) error=_mi_search(info,share->keyinfo+inx,info->lastkey, USE_WHOLE_KEY, flag, share->state.key_root[inx]); - if (share->concurrent_insert) + if (!error) { - if (!error) + int res= 0; + while ((share->concurrent_insert && + info->lastpos >= info->state->data_file_length) || + (info->index_cond_func && + !(res= mi_check_index_cond(info, inx, buf)))) { - while (info->lastpos >= info->state->data_file_length) - { - /* Skip rows that are inserted by other threads since we got a lock */ - if ((error=_mi_search_next(info,share->keyinfo+inx,info->lastkey, - info->lastkey_length, - SEARCH_SMALLER, - share->state.key_root[inx]))) - break; - } + /* + Skip rows that are either inserted by other threads since + we got a lock or do not match pushed index conditions + */ + if ((error=_mi_search_next(info,share->keyinfo+inx,info->lastkey, + info->lastkey_length, + SEARCH_SMALLER, + share->state.key_root[inx]))) + break; + } + if (!error && res == 2) + { + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[inx]); + info->lastpos= HA_OFFSET_ERROR; + DBUG_RETURN(my_errno= HA_ERR_END_OF_FILE); } - rw_unlock(&share->key_root_lock[inx]); } + + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[inx]); + info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED); info->update|= HA_STATE_PREV_FOUND; if (error) |