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[16Beta1][doc] pgstat: Track time of the last scan of a relation

Shinoda, Noriyoshi <noriyoshi.shinoda@hpe.com>

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From: "Shinoda, Noriyoshi (PN Japan FSIP)" <noriyoshi.shinoda@hpe.com>
To: PostgreSQL-development <pgsql-hackers@postgresql.org>
Cc: "dpage@pgadmin.org" <dpage@pgadmin.org>, "andres@anarazel.de" <andres@anarazel.de>, "bruce@momjian.us" <bruce@momjian.us>, "vik@postgresfriends.org" <vik@postgresfriends.org>
Date: 2023-05-31T03:56:51Z
Lists: pgsql-hackers

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Hi, hackers.
 PostgreSQL 16 Beta1, added last access time to pg_stat_all_tables and pg_stat_all_indexes views by this patch [1].
According to the documentation [2], the data type of the columns added to these views is 'timestamptz'. 
However, columns of the same data type in pg_stat_all_tables.last_vacuum, last_analyze and other tables are unified to 'timestamp with time zone'. The attached patch changes the data type of the added column from timestamptz to timestamp with time zone.

[1] pgstat: Track time of the last scan of a relation
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=c037471832e1ec3327f81eebbd8892e5c1042fe0
[2] pg_stat_activity view
https://www.postgresql.org/docs/16/monitoring-stats.html#MONITORING-PG-STAT-ALL-TABLES-VIEW

Regards,
Noriyoshi Shinoda

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  1. Doc: unify use of timestamp with time zone vs timestamptz

  2. pgstat: Track time of the last scan of a relation