查询 mysql 被锁死的事务

CREATE PROCEDURE `kill_metadata_lock`()
    COMMENT '查询被锁死的事务,适用于mysql'
BEGIN
    select 
    concat('kill ', p1.id, ';')
from
    information_schema.processlist p1,
    (select 
        id, time
    from
        information_schema.processlist
    where
        time = (select 
                max(time)
            from
                information_schema.processlist
            where
                state = 'Waiting for table metadata lock'
                    and substring(info, 1, 5) in ('alter' , 'optim', 'repai', 'lock ', 'drop ', 'creat', 'trunc'))) p2
where
    p1.time >= p2.time
        and p1.command in ('Sleep' , 'Query')
        and p1.id not in (connection_id() , p2.id);
END;