mirror of
https://github.com/MariaDB/server.git
synced 2025-10-25 18:38:00 +03:00
105 lines
1.8 KiB
Plaintext
105 lines
1.8 KiB
Plaintext
-- source include/have_innodb.inc
|
|
# Can't test this with embedded server
|
|
-- source include/not_embedded.inc
|
|
|
|
#
|
|
# Check and select innodb lock type
|
|
#
|
|
|
|
set global innodb_table_locks=1;
|
|
|
|
select @@innodb_table_locks;
|
|
|
|
#
|
|
# Testing of explicit table locks with enforced table locks
|
|
#
|
|
|
|
connect (con1,localhost,root,,);
|
|
connect (con2,localhost,root,,);
|
|
|
|
--disable_warnings
|
|
drop table if exists t1;
|
|
--enable_warnings
|
|
|
|
#
|
|
# Testing of explicit table locks with enforced table locks
|
|
#
|
|
|
|
set @@innodb_table_locks=1;
|
|
|
|
connection con1;
|
|
create table t1 (id integer, x integer) engine=INNODB;
|
|
insert into t1 values(0, 0);
|
|
set autocommit=0;
|
|
SELECT * from t1 where id = 0 FOR UPDATE;
|
|
|
|
connection con2;
|
|
set autocommit=0;
|
|
|
|
# The following statement should hang because con1 is locking the page
|
|
--send
|
|
lock table t1 write;
|
|
--sleep 2
|
|
|
|
connection con1;
|
|
update t1 set x=1 where id = 0;
|
|
select * from t1;
|
|
commit;
|
|
|
|
connection con2;
|
|
reap;
|
|
update t1 set x=2 where id = 0;
|
|
commit;
|
|
unlock tables;
|
|
|
|
connection con1;
|
|
select * from t1;
|
|
commit;
|
|
|
|
drop table t1;
|
|
|
|
#
|
|
# Try with old lock method (where LOCK TABLE is ignored by InnoDB)
|
|
#
|
|
|
|
set @@innodb_table_locks=0;
|
|
|
|
create table t1 (id integer primary key, x integer) engine=INNODB;
|
|
insert into t1 values(0, 0),(1,1),(2,2);
|
|
commit;
|
|
SELECT * from t1 where id = 0 FOR UPDATE;
|
|
|
|
connection con2;
|
|
set autocommit=0;
|
|
set @@innodb_table_locks=0;
|
|
|
|
# The following statement should work becase innodb doesn't check table locks
|
|
lock table t1 write;
|
|
|
|
connection con1;
|
|
|
|
# This will be locked by MySQL
|
|
--send
|
|
update t1 set x=10 where id = 2;
|
|
--sleep 2
|
|
|
|
connection con2;
|
|
|
|
# Note that we will get a deadlock if we try to select any rows marked
|
|
# for update by con1 !
|
|
|
|
SELECT * from t1 where id = 2;
|
|
UPDATE t1 set x=3 where id = 2;
|
|
commit;
|
|
SELECT * from t1;
|
|
commit;
|
|
unlock tables;
|
|
|
|
connection con1;
|
|
reap;
|
|
commit;
|
|
select * from t1;
|
|
drop table t1;
|
|
|
|
# End of 4.1 tests
|