Merge pull request #140 from blogh/fix_duration_mode_in_11+

Fix duration mode

Author: blogh

Diff for: pgactivity/Data.py

@@ -350,7 +350,7 @@ def pg_get_activities(self, duration_mode=1):
             ELSE pg_stat_activity.client_addr::TEXT
             END
         AS client,
-        EXTRACT(epoch FROM (NOW() - pg_stat_activity.query_start)) AS duration,
+        EXTRACT(epoch FROM (NOW() - pg_stat_activity.{duration_column})) AS duration,
         CASE WHEN pg_stat_activity.wait_event_type IN ('LWLock', 'Lock', 'BufferPin') THEN true ELSE false END AS wait,
         pg_stat_activity.usename AS user,
         pg_stat_activity.state AS state,
@@ -365,7 +365,7 @@ def pg_get_activities(self, duration_mode=1):
             ELSE extract(epoch from now() - {duration_column}) > %(min_duration)s
             END
     ORDER BY
-        EXTRACT(epoch FROM (NOW() - pg_stat_activity.query_start)) DESC
+        EXTRACT(epoch FROM (NOW() - pg_stat_activity.{duration_column})) DESC
             """
         elif self.pg_num_version >= 100000:
             # PostgreSQL 10