如下:

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

ORDER BY
    lap DESC;

关闭制定postgres查询进程:

SELECT pg_cancel_backend(27087);
SELECT pg_terminate_backend(27087);