mariadb/mysql-test/r/flush_block_commit.result

drop table if exists t1;
create table t1 (a int) engine=innodb;
begin;
insert into t1 values(1);
flush tables with read lock;
select * from t1;
a
 commit;
select * from t1;
a
unlock tables;
begin;
select * from t1 for update;
a
1
begin;
 select * from t1 for update;
 flush tables with read lock;
commit;
a
1
unlock tables;
drop table t1;
Making FLUSH TABLES WITH READ LOCK block COMMITs of existing transactions, in a deadlock-free manner. This splits locking the global read lock in two steps. This fixes a consequence of this bug, known as: BUG#4953 'mysqldump --master-data may report incorrect binlog position if using InnoDB' And a test. sql/handler.cc: making COMMIT wait if FLUSH TABLES WITH READ LOCK happened. sql/lock.cc: an additional stage so that FLUSH TABLES WITH READ LOCK blocks COMMIT: make_global_read_lock_block_commit(): taking the global read lock is TWO steps (2nd step is optional; without it, COMMIT of existing transactions will be allowed): lock_global_read_lock() THEN make_global_read_lock_block_commit(). sql/mysql_priv.h: new argument to wait_if_global_read_lock() sql/sql_class.h: THD::global_read_lock now an uint to reflect the 2 steps of global read lock (does not block COMMIT / does) sql/sql_db.cc: update for new prototype sql/sql_parse.cc: implementing the two steps of global read lock so that FLUSH TABLES WITH READ LOCK can block COMMIT without deadlocking with COMMITs. 2004-08-20 16:35:23 +02:00			`drop table if exists t1;`
after merge fix myisam/Makefile.am: put zlib at the end (libtool adds the whole bunch of dependencies right after that) sql/Makefile.am: put zlib at the end (libtool adds the whole bunch of dependencies right after that) 2004-08-20 22:54:42 +02:00			`create table t1 (a int) engine=innodb;`
Making FLUSH TABLES WITH READ LOCK block COMMITs of existing transactions, in a deadlock-free manner. This splits locking the global read lock in two steps. This fixes a consequence of this bug, known as: BUG#4953 'mysqldump --master-data may report incorrect binlog position if using InnoDB' And a test. sql/handler.cc: making COMMIT wait if FLUSH TABLES WITH READ LOCK happened. sql/lock.cc: an additional stage so that FLUSH TABLES WITH READ LOCK blocks COMMIT: make_global_read_lock_block_commit(): taking the global read lock is TWO steps (2nd step is optional; without it, COMMIT of existing transactions will be allowed): lock_global_read_lock() THEN make_global_read_lock_block_commit(). sql/mysql_priv.h: new argument to wait_if_global_read_lock() sql/sql_class.h: THD::global_read_lock now an uint to reflect the 2 steps of global read lock (does not block COMMIT / does) sql/sql_db.cc: update for new prototype sql/sql_parse.cc: implementing the two steps of global read lock so that FLUSH TABLES WITH READ LOCK can block COMMIT without deadlocking with COMMITs. 2004-08-20 16:35:23 +02:00			`begin;`
			`insert into t1 values(1);`
			`flush tables with read lock;`
			`select * from t1;`
			`a`
			`commit;`
			`select * from t1;`
			`a`
			`unlock tables;`
			`begin;`
			`select * from t1 for update;`
			`a`
			`1`
			`begin;`
			`select * from t1 for update;`
			`flush tables with read lock;`
			`commit;`
			`a`
			`1`
			`unlock tables;`
			`drop table t1;`