--echo #Test for Exclusive, GAP locks

-- connect (con1,localhost,root,,)
-- connect (con2,localhost,root,,)
-- connect (con3,localhost,root,,)

--disable_warnings
drop table if exists t1_x_gap;
--enable_warnings

--connection con1
use test;
create table t1_x_gap (id int(10) primary key, x int(10)) engine=INNODB;
insert into t1_x_gap values (1,10),(2,20),(3,30),(4,40),(5,50);

start transaction;
select * from t1_x_gap where id<5 for update;

--connection con3
select object_schema, object_name, lock_type, lock_mode, lock_status, lock_data
  from performance_schema.data_locks
  where object_name="t1_x_gap"
  order by lock_type, lock_mode, lock_status, lock_data;

--connection con2
start transaction;
-- send
insert into t1_x_gap values (0,0);

-- connection default
let $wait_condition= SELECT COUNT(*)>=1 FROM performance_schema.data_locks
  where OBJECT_NAME='t1_x_gap' and LOCK_STATUS='WAITING';
--source include/wait_condition.inc

--connection con3
# Do not display LOCK_DATA, it can be NULL,
# upon eviction from the innodb buffer pool
select object_schema, object_name, lock_type, lock_mode, lock_status
  from performance_schema.data_locks
  where object_name="t1_x_gap"
  order by lock_type, lock_mode, lock_status;

--connection con1
commit;

# Wait for the con2 waiting lock to be granted, now that con1 is gone.
-- connection default
let $wait_condition= SELECT COUNT(*)=0 FROM performance_schema.data_locks
  where OBJECT_NAME='t1_x_gap' and LOCK_STATUS='WAITING';
--source include/wait_condition.inc

--connection con3
select object_schema, object_name, lock_type, lock_mode, lock_status
  from performance_schema.data_locks
  where object_name="t1_x_gap";

--connection con2
-- reap
commit;

--connection con1
drop table t1_x_gap;

--connection default
--disconnect con1
--disconnect con2
--disconnect con3

let $count_sessions= 1;
--source include/wait_until_count_sessions.inc