| From: | Richard Guo <guofenglinux(at)gmail(dot)com> |
|---|---|
| To: | David Rowley <dgrowleyml(at)gmail(dot)com> |
| Cc: | Andrei Lepikhov <lepihov(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Memoize ANTI and SEMI JOIN inner |
| Date: | 2025-04-10 10:36:14 |
| Message-ID: | CAMbWs48FdLiMNrmJL-g6mDvoQVt0yNyJAqMkv4e2Pk-5GKCZLA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Apr 9, 2025 at 6:18 PM David Rowley <dgrowleyml(at)gmail(dot)com> wrote:
> On Wed, 9 Apr 2025 at 18:48, Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> > Perhaps we could spend some planner cycles proving inner_unique for
> > anti joins, so that Memoize nodes can be considered for them?
> Worth a try. It should be pretty easy to enable, as far as I can see.
> It might just be a case of shuffling the cases around in the switch
> statement in add_paths_to_joinrel().
Right. Here is a patch for that.
Thanks
Richard
| Attachment | Content-Type | Size |
|---|---|---|
| v1-0001-Enable-use-of-Memoize-for-ANTI-joins.patch | application/octet-stream | 9.1 KB |
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