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block using QC in case of having tables locked by LOCK... (BUG#12385)

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bell@52.0.168.192.in-addr.arpa 2005-08-10 18:58:55 +03:00
parent 518745abd4
commit 1dff783854
3 changed files with 56 additions and 2 deletions
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18
mysql-test/r/query_cache_noembeded.result Normal file
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@ -0,0 +1,18 @@
set GLOBAL query_cache_size=1355776;
reset query cache;
flush status;
CREATE TABLE t1 ( a INT NOT NULL PRIMARY KEY AUTO_INCREMENT ) ENGINE =
MyISAM;
LOCK TABLE t1 READ LOCAL;
INSERT INTO t1 VALUES (), (), ();
SELECT * FROM t1;
a
SELECT * FROM t1;
a
1
2
3
SELECT * FROM t1;
a
drop table t1;
set GLOBAL query_cache_size=default;

33
mysql-test/t/query_cache_noembeded.test Normal file
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@ -0,0 +1,33 @@
-- source include/have_query_cache.inc
-- source include/not_embedded.inc
#
# Tests with query cache
#
set GLOBAL query_cache_size=1355776;
# Reset query cache variables.
reset query cache;
flush status;
#
# do not use QC if tables locked (BUG#12385)
#
connect (root,localhost,root,,test,$MASTER_MYPORT,master.sock);
connection root;
CREATE TABLE t1 ( a INT NOT NULL PRIMARY KEY AUTO_INCREMENT ) ENGINE =
MyISAM;
LOCK TABLE t1 READ LOCAL;
connect (root2,localhost,root,,test,$MASTER_MYPORT,master.sock);
connection root2;
INSERT INTO t1 VALUES (), (), ();
connection root;
SELECT * FROM t1;
connection root2;
SELECT * FROM t1;
connection root;
SELECT * FROM t1;
drop table t1;
set GLOBAL query_cache_size=default;

7
sql/sql_cache.cc
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@ -739,7 +739,7 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
TABLE_COUNTER_TYPE local_tables;
ulong tot_length;
DBUG_ENTER("Query_cache::store_query");
if (query_cache_size == 0)
if (query_cache_size == 0 || thd->locked_tables)
DBUG_VOID_RETURN;
if ((local_tables= is_cacheable(thd, thd->query_length,
@ -750,7 +750,10 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
STRUCT_LOCK(&structure_guard_mutex);
if (query_cache_size == 0)
{
STRUCT_UNLOCK(&structure_guard_mutex);
DBUG_VOID_RETURN;
}
DUMP(this);
/* Key is query + database + flag */
@ -874,7 +877,7 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
byte flags;
DBUG_ENTER("Query_cache::send_result_to_client");
if (query_cache_size == 0 ||
if (query_cache_size == 0 || thd->locked_tables ||
/*
it is not possible to check has_transactions() function of handler
because tables not opened yet