SET DEBUG_SYNC = 'dispatch_command_before_set_time WAIT_FOR do_set_time';
SELECT 1;
SET DEBUG_SYNC = 'fill_schema_processlist_after_unow SIGNAL do_set_time WAIT_FOR fill_schema_proceed';
SELECT ID, TIME,TIME_MS FROM INFORMATION_SCHEMA.PROCESSLIST WHERE CONCAT(":", ID, ":") = ":TID:";
1
1
SET DEBUG_SYNC = 'now SIGNAL fill_schema_proceed';
ID	TIME	TIME_MS
TID	0	0.000
set debug_sync='reset';
SET debug_dbug="+d,sleep_inject_query_done_debug_sync";
select sleep(5);
sleep(5)
0
SET DEBUG_SYNC = 'now WAIT_FOR query_done';
select command, time < 5 from information_schema.processlist where id != connection_id();
command	time < 5
Sleep	1
set debug_sync='reset';