diff options
Diffstat (limited to 'myisam')
| -rw-r--r-- | myisam/mi_rkey.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/myisam/mi_rkey.c b/myisam/mi_rkey.c index de4cefb19b6..98e1a0a9a26 100644 --- a/myisam/mi_rkey.c +++ b/myisam/mi_rkey.c @@ -68,6 +68,7 @@ int mi_rkey(MI_INFO *info, byte *buf, int inx, const byte *key, uint key_len, if (fast_mi_readinfo(info)) goto err; + if (share->concurrent_insert) rw_rdlock(&share->key_root_lock[inx]); @@ -89,24 +90,35 @@ int mi_rkey(MI_INFO *info, byte *buf, int inx, const byte *key, uint key_len, case HA_KEY_ALG_BTREE: default: if (!_mi_search(info, keyinfo, key_buff, use_key_length, - myisam_read_vec[search_flag], info->s->state.key_root[inx])) + myisam_read_vec[search_flag], info->s->state.key_root[inx])) { - while (info->lastpos >= info->state->data_file_length) + /* + If we are searching for an exact key (including the data pointer) + and this was added by an concurrent insert, + then the result is "key not found". + */ + if ((search_flag == HA_READ_KEY_EXACT) && + (info->lastpos >= info->state->data_file_length)) + { + my_errno= HA_ERR_KEY_NOT_FOUND; + info->lastpos= HA_OFFSET_ERROR; + } + else while (info->lastpos >= info->state->data_file_length) { /* Skip rows that are inserted by other threads since we got a lock Note that this can only happen if we are not searching after an exact key, because the keys are sorted according to position */ - if (_mi_search_next(info, keyinfo, info->lastkey, - info->lastkey_length, - myisam_readnext_vec[search_flag], - info->s->state.key_root[inx])) + info->lastkey_length, + myisam_readnext_vec[search_flag], + info->s->state.key_root[inx])) break; } } } + if (share->concurrent_insert) rw_unlock(&share->key_root_lock[inx]); |