PostgreSQL查看正在执行的任务并强制结束的操作方法

查看任务sql语句：

select 
  procpid, 
  start, 
  now() - start as lap, 
  current_query 
from 
  (select 
    backendid, 
    pg_stat_get_backend_pid(s.backendid) as procpid, 
    pg_stat_get_backend_activity_start(s.backendid) as start, 
    pg_stat_get_backend_activity(s.backendid) as current_query 
  from 
    (select pg_stat_get_backend_idset() as backendid) as s 
  ) as s 
where 
  current_query <> '<idle>' 
order by 
  lap desc;

其中

procpid：进程id
start：进程开始时间
lap：经过时间
current_query：执行中的sql

强制停止某一个任务：

select pg_cancel_backend(进程id);

补充：

select 
 pid, 
 datname as db, 
 query_start as start,
 now() - query_start as lap, 
 query 
from pg_stat_activity 
where state <> 'idle' and query not like '%pg_stat_activity%'
 and (now() - query_start) > interval '10 seconds';

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