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：通過時間
current_query：執行中的sql
怎樣中止正在執行的sql
SELECT pg_cancel_backend(進程id);
或者用系統函數
kill -9 進程id;