diff options
Diffstat (limited to 'sql/sql_base.cc')
-rw-r--r-- | sql/sql_base.cc | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/sql/sql_base.cc b/sql/sql_base.cc index 4d7c2c485ab..f01f539ec51 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -858,6 +858,7 @@ void free_io_cache(TABLE *table) DBUG_VOID_RETURN; } + /* Close all tables which aren't in use by any thread @@ -970,6 +971,71 @@ bool close_cached_tables(THD *thd, bool if_wait_for_refresh, /* + Close all tables which match specified connection string or + if specified string is NULL, then any table with a connection string. +*/ + +bool close_cached_connection_tables(THD *thd, bool if_wait_for_refresh, + LEX_STRING *connection, bool have_lock) +{ + uint idx; + TABLE_LIST tmp, *tables= NULL; + bool result= FALSE; + DBUG_ENTER("close_cached_connections"); + DBUG_ASSERT(thd); + + bzero(&tmp, sizeof(TABLE_LIST)); + + if (!have_lock) + VOID(pthread_mutex_lock(&LOCK_open)); + + for (idx= 0; idx < table_def_cache.records; idx++) + { + TABLE_SHARE *share= (TABLE_SHARE *) hash_element(&table_def_cache, idx); + + /* Ignore if table is not open or does not have a connect_string */ + if (!share->connect_string.length || !share->ref_count) + continue; + + /* Compare the connection string */ + if (connection && + (connection->length > share->connect_string.length || + (connection->length < share->connect_string.length && + (share->connect_string.str[connection->length] != '/' && + share->connect_string.str[connection->length] != '\\')) || + strncasecmp(connection->str, share->connect_string.str, + connection->length))) + continue; + + /* close_cached_tables() only uses these elements */ + tmp.db= share->db.str; + tmp.table_name= share->table_name.str; + tmp.next_local= tables; + + tables= (TABLE_LIST *) memdup_root(thd->mem_root, (char*)&tmp, + sizeof(TABLE_LIST)); + } + + if (tables) + result= close_cached_tables(thd, FALSE, tables, TRUE); + + if (!have_lock) + VOID(pthread_mutex_unlock(&LOCK_open)); + + if (if_wait_for_refresh) + { + pthread_mutex_lock(&thd->mysys_var->mutex); + thd->mysys_var->current_mutex= 0; + thd->mysys_var->current_cond= 0; + thd->proc_info=0; + pthread_mutex_unlock(&thd->mysys_var->mutex); + } + + DBUG_RETURN(result); +} + + +/* Mark all tables in the list which were used by current substatement as free for reuse. |