postgresql 死锁问题解决记录

--查询阻塞的sql（ 死锁了，没有执行通过的sql ）
select  *  from  pg_stat_activity aa,
(
select  a.locktype,a. database ,a.pid,a.mode,a.relation,b.relname  from  pg_locks a  join  pg_class b  on  a.relation=b.oid
 where  upper (b.relname)= 'FX_WDSJ_DSZH'
) bb
where  aa.pid=bb.pid
 and  aa.waiting= 't'

--释放 死锁的sql
select  pg_cancel_backend(上面查询到的pid)
--查询是否锁表了
select  oid  from  pg_class  where  relname= '可能锁表了的表'  --oid是每个表隐藏的id
select  pid  from  pg_locks  where  relation= '上面查出的oid'
--如果查询到了结果 则释放锁定
select  pg_cancel_backend(上面查到的pid)