database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-12-24 11:21:21 +03:00
Code Activity

Bug #30269 Query cache eats memory

Browse Source 
Although the query cache doesn't support retrieval of statements containing
column level access control, it was still possible to cache such statements
thus wasting memory.

This patch extends the access control check on the target tables to avoid
caching a statement with column level restrictions.
This commit is contained in:
thek@adventure.(none)
2007-08-17 16:55:20 +02:00
parent 889b4ebcee
commit a4248c2dd3
4 changed files with 79 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
mysql-test/r/query_cache.result
View File

@@ -1502,6 +1502,30 @@ a (select count(*) from t2)
3 0
4 0
drop table t1,t2;
DROP DATABASE IF EXISTS bug30269;
CREATE DATABASE bug30269;
USE bug30269;
CREATE TABLE test1 (id int, name varchar(23));
CREATE VIEW view1 AS SELECT id FROM test1;
INSERT INTO test1 VALUES (5, 'testit');
GRANT SELECT (id) ON TABLE bug30269.test1 TO 'bug30269'@'localhost';
GRANT SELECT ON TABLE bug30269.view1 TO 'bug30269'@'localhost';
set global query_cache_size= 81920;
USE bug30269;
show status like 'Qcache_queries_in_cache';
Variable_name Value
Qcache_queries_in_cache 0
SELECT id FROM test1 WHERE id>2;
id
5
SELECT id FROM view1 WHERE id>2;
id
5
show status like 'Qcache_queries_in_cache';
Variable_name Value
Qcache_queries_in_cache 0
DROP DATABASE bug30269;
DROP USER 'bug30269'@'localhost';
set GLOBAL query_cache_type=default;
set GLOBAL query_cache_limit=default;
set GLOBAL query_cache_min_res_unit=default;