檢視任務sql語句：

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：程序id
start：程序開始時間
lap：經過時間
current_query：執行中的sql

強制停止某一個任務：

SELECT pg_cancel_backend(程序id);

補充：

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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