| From: | Antonin Houska <ah(at)cybertec(dot)at> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Richard Guo <riguo(at)pivotal(dot)io>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Michael Paquier <michael(at)paquier(dot)xyz>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] WIP: Aggregation push-down |
| Date: | 2019-09-05 06:10:58 |
| Message-ID: | 7087.1567663858@localhost |
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| Lists: | pgsql-hackers |
Alvaro Herrera <alvherre(at)2ndquadrant(dot)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:
But 1) still remains.
--
Antonin Houska
Web: https://www.cybertec-postgresql.com
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