set @log_output.saved = @@global.log_output;
set @@global.log_output = 'TABLE';
connect  con1,localhost,root,,;
connect  con2,localhost,root,,;
connection con1;
set session long_query_time=10;
select get_lock('bug27638', 1);
get_lock('bug27638', 1)
1
connection con2;
set session long_query_time=1;
select get_lock('bug27638', 2);
get_lock('bug27638', 2)
0
select if (query_time >= '00:00:01', 'OK', concat('WRONG: ',query_time)) as qt, sql_text from mysql.slow_log
where sql_text = 'select get_lock(\'bug27638\', 2)';
qt	sql_text
OK	select get_lock('bug27638', 2)
select get_lock('bug27638', 60);
get_lock('bug27638', 60)
0
select if (query_time >= '00:00:59', 'OK', concat('WRONG: ',query_time)) as qt, sql_text from mysql.slow_log
where sql_text = 'select get_lock(\'bug27638\', 60)';
qt	sql_text
OK	select get_lock('bug27638', 60)
select get_lock('bug27638', 101);
get_lock('bug27638', 101)
0
select if (query_time >= '00:01:40', 'OK', concat('WRONG: ',query_time)) as qt, sql_text from mysql.slow_log
where sql_text = 'select get_lock(\'bug27638\', 101)';
qt	sql_text
OK	select get_lock('bug27638', 101)
connection con1;
select release_lock('bug27638');
release_lock('bug27638')
1
connection default;
disconnect con1;
disconnect con2;
set @@global.log_output = @log_output.saved;