Date: Thu, 7 Jan 2021 11:47:13 -0300
From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Tomas Vondra <tomas.vondra@enterprisedb.com>
Cc: Tatsuro Yamada <tatsuro.yamada.tf@nttcom.co.jp>,
	Tomas Vondra <tomas.vondra@2ndquadrant.com>,
	Michael Paquier <michael@paquier.xyz>,
	Pavel Stehule <pavel.stehule@gmail.com>,
	Julien Rouhaud <rjuju123@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: list of extended statistics on psql
Message-ID: <20210107144713.GA8872@alvherre.pgsql>
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On 2021-Jan-07, Tomas Vondra wrote:

> On 1/7/21 1:46 AM, Tatsuro Yamada wrote:

> > I overlooked the check for MCV in the logic building query
> > because I created the patch as a new feature on PG14.
> > I'm not sure whether we should do back patch or not. However, I'll
> > add the check on the next patch because it is useful if you decide to
> > do the back patch on PG10, 11, 12, and 13.
> 
> BTW perhaps a quick look at the other \d commands would show if there are
> precedents. I didn't have time for that.

Yes, we do promise that new psql works with older servers.

I think we would not backpatch any of this, though.

-- 
Álvaro Herrera