On Tue, Jun 13, 2017 at 10:08 PM, Tatsuo Ishii <is...@sraoss.co.jp> wrote:
> In 
> https://www.postgresql.org/docs/10/static/hot-standby.html#hot-standby-users
> It is explained that read only transactions (not in standby) allow to
> update sequences.
>     In normal operation, <quote>read-only</> transactions are allowed to
>     update sequences and to use <command>LISTEN</>, <command>UNLISTEN</>, and
>     <command>NOTIFY</>, so Hot Standby sessions operate under slightly tighter
>     restrictions than ordinary read-only sessions.  It is possible that some
>     of these restrictions might be loosened in a future release.
> This is plain wrong.

It used to be true.  Tom changed it in commit
05d8a561ff85db1545f5768fe8d8dc9d99ad2ef7, back in 2010.

Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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