diff options
| author | thek@adventure.(none) <> | 2007-07-12 13:29:51 +0200 |
|---|---|---|
| committer | thek@adventure.(none) <> | 2007-07-12 13:29:51 +0200 |
| commit | 8ee7e48de8a12e506496278d79daa053f3a354cd (patch) | |
| tree | b4d8f7213751b0b2364435ee6f6c011d652235e7 /sql/ha_myisam.h | |
| parent | 6d6674e71f8060ab396a5b56cdb505acf93f6c32 (diff) | |
| download | mariadb-git-8ee7e48de8a12e506496278d79daa053f3a354cd.tar.gz | |
Bug#28249 Query Cache returns wrong result with concurrent insert / certain lock
A race condition in the integration between MyISAM and the query cache code
caused the query cache to fail to invalidate itself on concurrently inserted
data.
This patch fix this problem by using the existing handler interface which, upon
each statement cache attempt, compare the size of the table as viewed from the
cache writing thread and with any snap shot of the global table state. If the
two sizes are different the global table size is unknown and the current
statement can't be cached.
Diffstat (limited to 'sql/ha_myisam.h')
| -rw-r--r-- | sql/ha_myisam.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sql/ha_myisam.h b/sql/ha_myisam.h index b186d9c7bb8..536ea211820 100644 --- a/sql/ha_myisam.h +++ b/sql/ha_myisam.h @@ -127,4 +127,11 @@ class ha_myisam: public handler int dump(THD* thd, int fd); int net_read_dump(NET* net); #endif +#ifdef HAVE_QUERY_CACHE + my_bool register_query_cache_table(THD *thd, char *table_key, + uint key_length, + qc_engine_callback + *engine_callback, + ulonglong *engine_data); +#endif }; |