# 
# INSERT LOW_PRIORITY
#
--source have_engine.inc

--source include/count_sessions.inc

--enable_connect_log

--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings

# We will be changing the GLOBAL value of low_priority_updates
# due to bug#64892 
# (Session-level low_priority_updates does not work for INSERT)
SET @low_prio_updates = @@global.low_priority_updates;

# Concurrent insert might interfere
# with HIGH|LOW_PRIORITY logic
SET @concur_insert = @@global.concurrent_insert;
SET GLOBAL concurrent_insert = NEVER;

--source create_table.inc
INSERT INTO t1 (a,b) VALUES (1,'f'),(2,'b');

# We will have 3 connections: 
#   con1 will start SELECT which should give us enough time;
#   con0 will run INSERT 
#   con2 will then start another SELECT.
# With INSERT LOW_PRIORITY we should see only old rows in both resultsets.

--connect (con0,localhost,root,,)
SET lock_wait_timeout = 4;
--connect (con1,localhost,root,,)
SET lock_wait_timeout = 4;
--connect (con2,localhost,root,,)
SET lock_wait_timeout = 4;

--connection con1

--send
SELECT SLEEP(1) FROM t1;

--connection con0
let $show_statement = SHOW PROCESSLIST;
let $field = State;
let $condition = = 'User sleep';
# We don't need to wait long,
# thread should show up in the processlist right away
let $wait_timeout = 2;
--source include/wait_show_condition.inc
--send
INSERT LOW_PRIORITY INTO t1 (a,b) VALUES (3,'z');

--connection con2

let $condition =  = 'Waiting for table level lock';
let $wait_timeout = 2;
--source include/wait_show_condition.inc
if (!$found)
{
  --let $mysql_errname = timeout in wait_show_condition
  --let $functionality = INSERT LOW_PRIORITY or table locking
  --source unexpected_result.inc
}
if ($found)
{
  --echo # Should return only 2 rows
  SELECT SLEEP(1) FROM t1;
}

--connection con1
--reap

--connection con0
--reap
--sorted_result
SELECT a,b FROM t1;

--disconnect con0
--disconnect con1
--disconnect con2
--connection default

SET GLOBAL low_priority_updates = @low_prio_updates;
SET GLOBAL concurrent_insert = @concur_insert;

# Cleanup
DROP TABLE t1;

--source include/wait_until_count_sessions.inc

--source cleanup_engine.inc

