Fix memory leak when memory_cache_enabled = on and write SQLs are sent.

In a explicit transaction, we the SELECT results are cached in temporary buffer.
If a write SQL is sent which modifies the table, the temporary buffe should be reset.

diff --git a/src/query_cache/pool_memqcache.c b/src/query_cache/pool_memqcache.c
index 201eecc6722fe499a8277b71f117a6ec88c3fb6d..7ab71bebf1c6ba8da89da2500bae852083f47a90 100644 (file)
--- a/src/query_cache/pool_memqcache.c
+++ b/src/query_cache/pool_memqcache.c
@@ -3345,6 +3345,7 @@ void pool_handle_query_cache(POOL_CONNECTION_POOL *backend, char *query, Node *n
                                         * if DML/DDL modifies the TABLE which SELECT uses.
                                         */
                                        pool_check_and_discard_cache_buffer(num_oids, oids);
+                                       pool_reset_memqcache_buffer();
                                } 
                        }
                        else if (num_oids == 0)