| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Corey Huinker <corey(dot)huinker(at)gmail(dot)com> |
| Cc: | Nathan Bossart <nathandbossart(at)gmail(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Michael Paquier <michael(at)paquier(dot)xyz>, jian he <jian(dot)universality(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Stephen Frost <sfrost(at)snowman(dot)net>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, alvherre(at)alvh(dot)no-ip(dot)org |
| Subject: | Re: Statistics Import and Export |
| Date: | 2025-03-06 18:08:20 |
| Message-ID: | zf7ar4nfezbztajzky5ok4foyodnb4hhrafs2oknk5yqul5dqs@l4hd5zxyc6ns |
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| Lists: | pgsql-hackers |
Hi,
On 2025-03-06 13:00:07 -0500, Corey Huinker wrote:
> >
> > I don't follow. We already have the tablenames, schemanames and oids of the
> > to-be-dumped tables/indexes collected in pg_dump, all that's needed is to
> > send
> > a list of those to the server to filter there?
> >
>
> Do we have something that currently does that?
Yes. Afaict there's at least:
- getPolicies()
- getIndexes()
- getConstraints()
- getTriggers(),
- getTableAttrs()
They all send an array of oids as part of the query and then join an
unnest()ed version of the array against whatever they're collecting. See
e.g. getPolicies():
"FROM unnest('%s'::pg_catalog.oid[]) AS src(tbloid)\n"
"JOIN pg_catalog.pg_policy pol ON (src.tbloid = pol.polrelid)",
Greetings,
Andres Freund
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