Re: Defer selection of asynchronous subplans until the executor initialization stage

Etsuro Fujita <etsuro.fujita@gmail.com>

From: Etsuro Fujita <etsuro.fujita@gmail.com>

To: Alexander Pyhalov <a.pyhalov@postgrespro.ru>

Cc: "Andrey V. Lepikhov" <a.lepikhov@postgrespro.ru>, Zhihong Yu <zyu@yugabyte.com>, Kyotaro Horiguchi <horikyota.ntt@gmail.com>, Justin Pryzby <pryzby@telsasoft.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>

Date: 2022-04-03T10:29:11Z

Lists: pgsql-hackers

Attachments

allow-async-in-more-cases-3.patch (application/octet-stream) patch

On Sun, Mar 13, 2022 at 6:39 PM Etsuro Fujita <etsuro.fujita@gmail.com> wrote:
> On Wed, Sep 15, 2021 at 3:40 PM Alexander Pyhalov
> <a.pyhalov@postgrespro.ru> wrote:
> > The patch looks good to me and seems to work as expected.
>
> I’m planning to commit the patch.

I polished the patch a bit:

* Reordered a bit of code in create_append_plan() in logical order (no
functional changes).
* Added more comments.
* Added/Tweaked regression test cases.

Also, I added the commit message.  Attached is a new version of the
patch.  Barring objections, I’ll commit this.

Best regards,
Etsuro Fujita

Commits

Improve comments for trivial_subqueryscan().
- 4a8a5dd7f59c 15.0 landed
Disable asynchronous execution if using gating Result nodes.
- ebb790241523 14.3 landed
- 5c854e7a2c8a 15.0 landed
Allow asynchronous execution in more cases.
- c2bb02bc2e85 15.0 landed
Doc: Further update documentation for asynchronous execution.
- eab81953682d 14.0 landed
Fix rescanning of async-aware Append nodes.
- f3baaf28a6da 14.0 landed
Doc: Update documentation for asynchronous execution.
- 15fcd33e0694 14.0 landed
Fix EXPLAIN ANALYZE for async-capable nodes.
- a363bc6da96b 14.0 landed
Minor code cleanup in asynchronous execution support.
- bb684c82f733 14.0 landed
Adjust input value to WaitEventSetWait() in ExecAppendAsyncEventWait().
- a8af856d3257 14.0 landed
Add support for asynchronous execution.
- 27e1f14563cf 14.0 landed