From: Antonin Houska <ah@cybertec.at>
To: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Richard Guo <riguo@pivotal.io>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: [HACKERS] WIP: Aggregation push-down
Date: Thu, 05 Sep 2019 08:10:58 +0200
Message-ID: <7087.1567663858@localhost> (raw)
In-Reply-To: <20190904202339.GA13644@alvherre.pgsql>
References: <20190904202339.GA13644@alvherre.pgsql>
Alvaro Herrera <alvherre@2ndquadrant.com> wrote:
> This stuff seems very useful. How come it sits unreviewed for so long?
I think the review is hard for people who are not interested in the planner
very much. And as for further development, there are a few design decisions
that can hardly be resolved without Tom Lane's comments. Right now I recall
two problems: 1) is the way I currently store RelOptInfo for the grouped
relations correct?, 2) how should we handle types for which logical equality
does not imply physical (byte-wise) equality?
Fortunately it seems now that I'm not the only one who cares about 2), so this
problem might be resolved soon:
https://www.postgresql.org/message-id/CAH2-Wzn3Ee49Gmxb7V1VJ3-AC8fWn-Fr8pfWQebHe8rYRxt5OQ%40mail.gma...
But 1) still remains.
--
Antonin Houska
Web: https://www.cybertec-postgresql.com
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To: pgsql-hackers@postgresql.org
Cc: ah@cybertec.at, alvherre@2ndquadrant.com, riguo@pivotal.io, tgl@sss.pgh.pa.us, michael@paquier.xyz
Subject: Re: [HACKERS] WIP: Aggregation push-down
In-Reply-To: <7087.1567663858@localhost>
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