2019独角兽企业重金招聘Python工程师标准>>> 
--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)