connect  con1,localhost,root,,;
SHOW PROCESSLIST;
Id	User	Host	db	Command	Time	State	Info	Progress
#	root	#	test	Sleep	#	#	NULL	0.000
#	root	#	test	Query	#	#	SHOW PROCESSLIST	0.000
SET DEBUG_SYNC='before_execute_sql_command SIGNAL ready WAIT_FOR go';
SHOW PROCESSLIST;
connection default;
SET DEBUG_SYNC='now WAIT_FOR ready';
KILL QUERY con_id;
SET DEBUG_SYNC='now SIGNAL go';
connection con1;
ERROR 70100: Query execution was interrupted
SET DEBUG_SYNC='reset';
SHOW PROCESSLIST;
Id	User	Host	db	Command	Time	State	Info	Progress
#	root	#	test	Sleep	#	#	NULL	0.000
#	root	#	test	Query	#	#	SHOW PROCESSLIST	0.000