| From: | Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com> |
|---|---|
| To: | Kazutaka Onishi <onishi(at)heterodb(dot)com> |
| Cc: | Kohei KaiGai <kaigai(at)heterodb(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Asynchronous execution support for Custom Scan |
| Date: | 2022-09-06 09:29:55 |
| Message-ID: | CAPmGK14CXTPx9RNf9G=DfxyyD46i=4sb1M0yX29_LkPLatb0=g@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Sep 5, 2022 at 10:32 PM Kazutaka Onishi <onishi(at)heterodb(dot)com> wrote:
> I'm sorry for my error on your name...
No problem.
> > IIUC, it uses the proposed
> > APIs, but actually executes ctidscans *synchronously*, so it does not
> > improve performance. Right?
> Exactly.
> The actual CustomScan that supports asynchronous execution will
> start processing in CustomScanAsyncRequest,
> configure to detect completion via file descriptor in
> CustomScanAsyncConfigureWait,
> and receive the result in CustomScanAsyncNotify.
Ok, thanks!
Best regards,
Etsuro Fujita
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