| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Richard Guo <guofenglinux(at)gmail(dot)com> |
| Cc: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: issues with eager aggregation |
| Date: | 2026-09-17 15:55:01 |
| Message-ID: | CA+TgmoYOXGDDjQV_k9VcPOy45i8tGvTpDvofuhGOLZ0bajZu-A@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Sep 17, 2026 at 10:58 AM Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> As for the division-by-zero case, I agree it's user-visible, but I
> think eager aggregation should follow the same rules as our existing
> transformations, which already evaluate expressions on rows that a
> join removes.
OK, good. So this isn't really doing something that is fundamentally
new, which is what I was fearing. Do you think this section should be
adjusted at all?
https://www.postgresql.org/docs/current/sql-expressions.html#SYNTAX-EXPRESS-EVAL
--
Robert Haas
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