On 14 February 2017 at 14:19, Seki, Eiji <seki.e...@jp.fujitsu.com> wrote:
> Hi all,
> I propose the patch that adds a function GetOldestXminExtended that is like 
> GetOldestXmin but can ignore arbitrary vacuum flags. And then, rewrite 
> GetOldestXmin to use it. Note that this is done so as not to change the 
> behavior of GetOldestXmin.

FWIW, I have changes in the logical decoding on standby patch that
also need to extend GetOldestXmin. Specifically, I need to be able to
return the catalog_xmin separately, rather than the current behaviour
of returning what's effectively min(xmin,catalog_xmin).

It's only loosely related to this change, but may be relevant.

 Craig Ringer                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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