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3d6cea324a
The problem is that the query cache stores packets containing the server status of the time when the cached statement was run. This might lead to a wrong transaction status in the client side if a statement is cached during a transaction and is later served outside a transaction context (and vice-versa). The solution is to take into account the transaction status when storing in and serving from the query cache. mysql-test/r/innodb_cache.result: Update test case result. mysql-test/r/query_cache.result: Add test case result for Bug#36326 mysql-test/t/query_cache.test: Add test case for Bug#36326 sql/mysql_priv.h: Add new flags. sql/sql_cache.cc: Remember the transaction and autocommit status stored in the packet. tests/mysql_client_test.c: Add test case for Bug#36326
129 lines
3.1 KiB
Text
129 lines
3.1 KiB
Text
drop table if exists t1,t2,t3;
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flush status;
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set autocommit=0;
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create table t1 (a int not null) engine=innodb;
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insert into t1 values (1),(2),(3);
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select * from t1;
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a
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1
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2
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3
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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drop table t1;
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commit;
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set autocommit=1;
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begin;
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create table t1 (a int not null) engine=innodb;
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insert into t1 values (1),(2),(3);
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select * from t1;
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a
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1
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2
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3
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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drop table t1;
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commit;
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create table t1 (a int not null) engine=innodb;
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create table t2 (a int not null) engine=innodb;
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create table t3 (a int not null) engine=innodb;
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insert into t1 values (1),(2);
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insert into t2 values (1),(2);
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insert into t3 values (1),(2);
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select * from t1;
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a
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1
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2
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select * from t2;
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a
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1
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2
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select * from t3;
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a
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1
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2
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 3
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 0
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begin;
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select * from t1;
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a
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1
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2
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select * from t2;
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a
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1
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2
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select * from t3;
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a
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1
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2
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 6
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 0
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insert into t1 values (3);
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insert into t2 values (3);
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insert into t1 values (4);
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select * from t1;
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a
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1
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2
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3
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4
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select * from t2;
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a
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1
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2
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3
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select * from t3;
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a
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1
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2
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 1
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commit;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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drop table t3,t2,t1;
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CREATE TABLE t1 (id int(11) NOT NULL auto_increment, PRIMARY KEY (id)) ENGINE=InnoDB;
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select count(*) from t1;
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count(*)
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0
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insert into t1 (id) values (0);
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select count(*) from t1;
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count(*)
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1
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drop table t1;
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set GLOBAL query_cache_size=1355776;
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CREATE TABLE t1 ( id int(10) NOT NULL auto_increment, a varchar(25) default NULL, PRIMARY KEY (id), UNIQUE KEY a (a)) ENGINE=innodb;
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CREATE TABLE t2 ( id int(10) NOT NULL auto_increment, b varchar(25) default NULL, PRIMARY KEY (id), UNIQUE KEY b (b)) ENGINE=innodb;
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CREATE TABLE t3 ( id int(10) NOT NULL auto_increment, t1_id int(10) NOT NULL default '0', t2_id int(10) NOT NULL default '0', state int(11) default NULL, PRIMARY KEY (id), UNIQUE KEY t1_id (t1_id,t2_id), KEY t2_id (t2_id,t1_id), CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`t1_id`) REFERENCES `t1` (`id`), CONSTRAINT `t3_ibfk_2` FOREIGN KEY (`t2_id`) REFERENCES `t2` (`id`)) ENGINE=innodb;
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INSERT INTO t1 VALUES (1,'me');
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INSERT INTO t2 VALUES (1,'you');
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INSERT INTO t3 VALUES (2,1,1,2);
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delete from t3 where t1_id = 1 and t2_id = 1;
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select t1.* from t1, t2, t3 where t3.state & 1 = 0 and t3.t1_id = t1.id and t3.t2_id = t2.id and t1.id = 1 order by t1.a asc;
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id a
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begin;
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insert into t3 VALUES ( NULL, 1, 1, 2 );
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insert into t3 VALUES ( NULL, 1, 1, 2 );
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ERROR 23000: Duplicate entry '1-1' for key 2
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commit;
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select t1.* from t1, t2, t3 where t3.state & 1 = 0 and t3.t1_id = t1.id and t3.t2_id = t2.id and t1.id = 1 order by t1.a asc;
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id a
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1 me
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drop table t3,t2,t1;
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