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';