1 查找锁表的pid
select pid from pg_locks l join pg_class t on l.relation = t.oid where t.relkind = 'r' and t.relname = 'lockedtable';
2 查找锁表的语句
select pid, state, usename, query, query_start from pg_stat_activity where pid in ( select pid from pg_locks l join pg_class t on l.relation = t.oid and t.relkind = 'r' where t.relname = 'lockedtable');
3 查找所有活动的被锁的表
select pid, state, usename, query, query_start
from pg_stat_activity
where pid in (
select pid from pg_locks l
join pg_class t on l.relation = t.oid
and t.relkind = 'r'
);
4 解锁
SELECT pg_cancel_backend(pid);