postgres_locks_query_age_pre92.sql

--
--  Author: Hari Sekhon
--  Date: 2020-08-07 00:47:45 +0100 (Fri, 07 Aug 2020)
--
--  vim:ts=2:sts=2:sw=2:et:filetype=sql
--
--  https://github.com/HariSekhon/SQL-scripts
--
--  License: see accompanying Hari Sekhon LICENSE file
--
--  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
--
--  https://www.linkedin.com/in/HariSekhon
--

-- PostgreSQL locks with query and age for PostgreSQL <= 9.1
--
-- Requires PostgreSQL <= 9.1 (for newer versions see postgres_locks_query_age.sql)
--
-- Tested on PostgreSQL 8.4, 9.0, 9.1

-- https://wiki.postgresql.org/wiki/Lock_Monitoring

SELECT
  a.datname,
  c.relname,
  l.transactionid,
  l.mode,
  l.granted,
  a.usename,
  a.current_query,
  a.query_start,
  age(now(), a.query_start) as "age",
  a.procpid
FROM
  pg_stat_activity a
JOIN
  pg_locks l
ON
  l.pid = a.procpid
JOIN
  pg_class c
ON
  c.oid = l.relation
ORDER BY
  a.query_start;