Horton

Re: timestamp of the last replayed transaction

Fujii Masao <masao.fujii@gmail.com>

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From: Fujii Masao <masao.fujii@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Dimitri Fontaine <dimitri@2ndquadrant.fr>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2010-11-08T11:00:50Z
Lists: pgsql-hackers 
On Sat, Nov 6, 2010 at 9:58 AM, Robert Haas <robertmhaas@gmail.com> wrote:
> This looks good, but how about adding:
>
> if (!RecoveryInProgress())
>    PG_RETURN_NULL();
>
> Otherwise, if we're in Hot Standby mode for a while and then enter
> normal running, wouldn't this still return a (stale) value?

Yes, but isn't that (stale) value useful to check how far WAL records
have been replayed, *after failover*?

Regards,

-- 
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center