| From: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> |
|---|---|
| To: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Mats Julian Olsen <mats(at)duneanalytics(dot)com> |
| Cc: | pgsql-general(at)lists(dot)postgresql(dot)org, wilhelm(at)duneanalytics(dot)com |
| Subject: | Re: postgres_fdw insert extremely slow |
| Date: | 2020-11-27 04:25:21 |
| Message-ID: | 35a8b025f52641b6d60c432c0d1259eb64b07664.camel@cybertec.at |
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| Lists: | pgsql-general |
On Thu, 2020-11-26 at 09:07 -0800, Adrian Klaver wrote:
> So even if Mats where to break this query:
>
> INSERT INTO foreign.labels (address, labels)
> SELECT address_id, ARRAY_AGG(name) AS labels
> FROM labels
> GROUP BY 1
> LIMIT 100;
>
> down into something like this:
>
> INSERT INTO foreign.labels (address, labels)
> VALUES (), (), (), ();
>
> postgres_fdw would send it as individual INSERTs?
Yes, that's the way the FDW API works.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
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