mariadb/mysql-test/suite/pbxt/t/pbxt_locking.test

# This test covers various aspects of PBXT locking mechanism, including
# internal permanent/temporary row locking and MySQL locking

# TEST: select for update test
 
drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt; 
insert into t1 values (1), (2), (3), (4), (5);
begin;
select * from t1 where id < 5 for update;

connect (con1,localhost,root,,);

connection con1;

# this shouldn't lock
# note this implies usage of the index, table scan will block
update t1 set id = 8 where id = 5;

# this should block
send update t1 set id = 8 where id = 4;

connection default;
sleep 1;
replace_column 1 x 3 x 6 x;
show processlist;
commit;

connection con1;
reap;
select * from t1;

# TEST: make sure no unneeded temporary locks are set

connection default;

drop table if exists t1;
# notice absence of index
create table t1 (id int) engine = pbxt; 
insert into t1 values (1), (2), (3), (4), (5);

begin;
# after this statement all rows should be unlocked
select * from t1 where id > 10 for update;

connection con1;
# this shouldn't block
update t1 set id = 8;

connection default;
commit;
select * from t1;

# TEST: last row temp->perm locking

connection default;

drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt; 
insert into t1 values (1), (2), (3), (4), (5);

begin;
select * from t1 where id = 5 for update;

connection con1;

update t1 set id = 8 where id < 4;
# this should block
send update t1 set id = 8 where id = 5;

connection default;
sleep 1;
replace_column 1 x 3 x 6 x;
show processlist;
commit;

connection con1;
reap;

connection default;
select * from t1;

# TEST: select for update in auto-commit mode
# although this is not a widely used case in practice, make sure it operates correctly

connection default;

drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt; 
insert into t1 values (1), (2), (3), (4), (5);

# auto-commit mode - should unlock immediately
select * from t1 for update;

connection con1;
# this shouldn't block
update t1 set id = 8;

# TEST: same as before but from a stored routine

connection default;

drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt; 
insert into t1 values (1), (2), (3), (4), (5);

delimiter |;
create procedure p1 ()
begin
  select * from t1 for update;
end|

delimiter ;|
call p1 ();

connection con1;

# this shouldn't block
update t1 set id = 8;

--disable_query_log
drop procedure p1;
drop table t1;
drop database pbxt;
--enable_query_log