fix db_activity view/query for 9.6

sql/create_db_activity_view9.6.sql

@@ -1,5 +1,5 @@
 CREATE OR REPLACE VIEW db_activity AS
-SELECT (clock_timestamp() - pg_stat_activity.xact_start) AS ts_age, pg_stat_activity.state, (clock_timestamp() - pg_stat_activity.query_start) as query_age, (clock_timestamp() - state_change) as change_age, pg_stat_activity.datname, pg_stat_activity.pid, pg_stat_activity.usename, coalesce(wait_event_type = 'LOCK', 'f') waiting, pg_stat_activity.client_addr, pg_stat_activity.client_port, pg_stat_activity.query
+SELECT (clock_timestamp() - pg_stat_activity.xact_start) AS ts_age, pg_stat_activity.state, (clock_timestamp() - pg_stat_activity.query_start) as query_age, (clock_timestamp() - state_change) as change_age, pg_stat_activity.datname, pg_stat_activity.pid, pg_stat_activity.usename, coalesce(wait_event_type = 'Lock', 'f') waiting, pg_stat_activity.client_addr, pg_stat_activity.client_port, pg_stat_activity.query
 FROM pg_stat_activity
 WHERE
 ((clock_timestamp() - pg_stat_activity.xact_start > '00:00:00.1'::interval) OR (clock_timestamp() - pg_stat_activity.query_start > '00:00:00.1'::interval and state = 'idle in transaction (aborted)'))

sql/db_activity9.6.sql

@@ -1,4 +1,4 @@
-SELECT (clock_timestamp() - pg_stat_activity.xact_start) AS ts_age, pg_stat_activity.state, (clock_timestamp() - pg_stat_activity.query_start) as query_age, (clock_timestamp() - state_change) as change_age, pg_stat_activity.datname, pg_stat_activity.pid, pg_stat_activity.usename, coalesce(wait_event_type = 'LOCK', 'f') waiting, pg_stat_activity.client_addr, pg_stat_activity.client_port, pg_stat_activity.query
+SELECT (clock_timestamp() - pg_stat_activity.xact_start) AS ts_age, pg_stat_activity.state, (clock_timestamp() - pg_stat_activity.query_start) as query_age, (clock_timestamp() - state_change) as change_age, pg_stat_activity.datname, pg_stat_activity.pid, pg_stat_activity.usename, coalesce(wait_event_type = 'Lock', 'f') waiting, pg_stat_activity.client_addr, pg_stat_activity.client_port, pg_stat_activity.query
 FROM pg_stat_activity
 WHERE
 ((clock_timestamp() - pg_stat_activity.xact_start > '00:00:00.1'::interval) OR (clock_timestamp() - pg_stat_activity.query_start > '00:00:00.1'::interval and state = 'idle in transaction (aborted)'))