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#
# DELETE LOW_PRIORITY
#
--source have_engine.inc
--source include/count_sessions.inc
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
--let $create_definiiton = a $int_col, b $char_col
--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;
# default will run DELETE
# con2 will then start another SELECT.
# With LOW_PRIORITY_UPDATES = 0,
# with standard DELETE we should see all rows in con1 resultset,
# but no rows in con2 resultset.
# With DELETE LOW_PRIORITY we should see all rows in both resultsets.
# Then we will set LOW_PRIORITY_UPDATES to 1.
# Then with standard DELETE we should see all rows in both resultsets.
SET LOW_PRIORITY_UPDATES = 0;
SET lock_wait_timeout = 4;
# Normal DELETE with low_priority_updates=0
--connect (con1,localhost,root,,)
SET lock_wait_timeout = 2;
--send
SELECT SLEEP(1) FROM t1;
--connection default
let $show_statement = SHOW PROCESSLIST;
let $field = State;
let $condition = = 'User sleep';
# We don't need to wait long,
# if the feature works, threads
# should show up in the processlist right away
let $wait_timeout = 2;
--source include/wait_show_condition.inc
--send
DELETE FROM t1;
--connect (con2,localhost,root,,)
SET lock_wait_timeout = 3;
let $field = Info;
let $condition = = 'DELETE FROM t1';
let $wait_timeout = 2;
--source include/wait_show_condition.inc
if (!$found)
{
--let $mysql_errname = timeout in wait_show_condition.inc
--let $functionality = DELETE or table locking
--source unexpected_result.inc
}
if ($found)
{
SELECT SLEEP(1) FROM t1;
}
--connection con1
--reap
--connection default
--reap
--sorted_result
SELECT a,b FROM t1;
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b');
# DELETE LOW_PRIORITY
--connection con1
--send
SELECT SLEEP(1) FROM t1;
--connection default
let $field = State;
let $condition = = 'User sleep';
let $wait_timeout = 2;
--source include/wait_show_condition.inc
--send
DELETE LOW_PRIORITY FROM t1;
--connection con2
let $field = Info;
let $condition = = 'DELETE LOW_PRIORITY FROM t1';
let $wait_timeout = 2;
--source include/wait_show_condition.inc
if (!$found)
{
--let $mysql_errname = timeout in wait_show_condition.inc
--let $functionality = DELETE LOW_PRIORITY or table locking
--source unexpected_result.inc
}
if ($found)
{
SELECT SLEEP(1) FROM t1;
}
--connection con1
--reap
--connection default
--reap
--sorted_result
SELECT a,b FROM t1;
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b');
SET LOW_PRIORITY_UPDATES = 1;
# Normal DELETE with low_priority_updates=1
--connection con1
--send
SELECT SLEEP(1) FROM t1;
--connection default
let $field = State;
let $condition = = 'User sleep';
let $wait_timeout = 2;
--source include/wait_show_condition.inc
--send
DELETE FROM t1;
--connection con2
let $field = Info;
let $condition = = 'DELETE FROM t1';
let $wait_timeout = 2;
--source include/wait_show_condition.inc
if ($found)
{
SELECT SLEEP(1) FROM t1;
}
--connection con1
--reap
--connection default
--reap
--sorted_result
SELECT a,b FROM t1;
--disconnect con1
--disconnect con2
# Cleanup
DROP TABLE t1;
--source include/wait_until_count_sessions.inc
--source cleanup_engine.inc
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