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Subject: Re: libc to libicu via pg_dump/pg_restore?
From: Paul Foerster <paul.foerster@gmail.com>
In-Reply-To: <187f2c5d-f268-4596-bb63-c94790ae761d@aklaver.com>
Date: Fri, 7 Feb 2025 07:32:28 +0100
Cc: pgsql-general list <pgsql-general@lists.postgresql.org>
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Message-Id: <D46171D1-80B9-4E81-BC26-D47319B90CE3@gmail.com>
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 <187f2c5d-f268-4596-bb63-c94790ae761d@aklaver.com>
To: Adrian Klaver <adrian.klaver@aklaver.com>
Archived-At: <https://www.postgresql.org/message-id/D46171D1-80B9-4E81-BC26-D47319B90CE3%40gmail.com>
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Hi Adrian,

> On 6 Feb 2025, at 17:31, Adrian Klaver <adrian.klaver@aklaver.com> =
wrote:
>=20
> 1) Log into postgres database and do:
>=20
> a) DROP DATABASE mydb;
> b) CREATE DATABASE mydb <options>;
>=20
> 2) pg_restore -d mydb mydb.dump.gz

With create database <options> being "template template0", this is what =
my script does. But I need the -cC options for pg_restore to get ACLs =
back. Leaving out either one of them will not get me the ACLs back.

>> pg_restore: error: could not execute query: ERROR:  insert or update =
on table "table_1" violates foreign key constraint "..._fk"
>> DETAIL:  Key (dokument_id)=3D(1000033680) is not present in table =
"...".
>=20
> Is dokument_id an integer field?

Yes, it's a bigint.

> In a follow post you said:
>=20
> "Everything works for all databases. Only this one has that problem."
>=20
> Do you mean you made the same libc --> icu change on the other =
databases with no errors?

Yes, I have that PostgreSQL 15.10 cluster with locale provider libc with =
about 40 databases. I initdb'ed a new PostgreSQL 17.2 cluster with icu =
as locale provider and did a "create database ... template template0" =
for all about 40 databases. Then I did the mentioned pg_restore for each =
of them as a parallel background job in the shell.

The whole database cluster is about 1.2 TB in size so I have to find =
ways to restore as many databases in parallel as possible. However =
pg_restore only fails on this single database. All others in that =
database cluster work fine.

Cheers
Paul