mariadb/mysql-test/t/maria-mvcc.test

#
# Testing insert and select on a table with two threads
# using locking
#

-- source include/have_maria.inc

--disable_warnings
drop table if exists t1;
--enable_warnings

connect (con1,localhost,root,,);
connection con1;

create table t1 (i int) engine=maria;
show create table t1;
lock tables t1 write concurrent;
insert into t1 values (1);
insert into t1 values (2);
/* should see 1 and 2 */
select i from t1;

connect (con2,localhost,root,,);
connection con2;
/* should see nothing */
select i from t1;
lock tables t1 write concurrent;
insert into t1 values (3);
insert into t1 values (4);
/* should see 3 and 4 */
select i from t1;
unlock tables;
lock tables t1 write concurrent;
insert into t1 values (5);
/* should see 3, 4 and 5 */
select i from t1;

connection con1;
insert into t1 values (6);
/* Should see 1, 2, 6 */
select i from t1;
unlock tables;
lock tables t1 write concurrent;
/* Should see 1, 2, 3, 4 and 6 */
select i from t1;

connection con2;
/* should see 3, 4, 5 */
select i from t1;
unlock tables;
/* should see 1, 2, 3, 4, 5, 6 */
select i from t1;

connection con1;
unlock tables;
/* should see 1, 2, 3, 4, 5, 6 */
select i from t1;

drop table t1;