innodb-lock.test 727 Bytes
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-- source include/have_innodb.inc

connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
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--disable_warnings
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drop table if exists t1;
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--enable_warnings
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#
# Testing of explicit table locks
#

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;