如何查看PostgreSQL正在執行的SQL

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;

 

procpid：進程id
start：進程開始時間
lap：經過時間
current_query：執行中的sql

怎樣停止正在執行的sql
SELECT pg_cancel_backend(進程id);

或者用系統函數

kill -9 進程id;