Re: BUG #16021: Can create Pk on partitioned table with foreign table as partition

From: Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com>
To: PG Bug reporting form <noreply(at)postgresql(dot)org>
Cc: PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org>, stepya(at)ukr(dot)net
Subject: Re: BUG #16021: Can create Pk on partitioned table with foreign table as partition
Date: 2019-09-25 07:48:42
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On Wed, Sep 25, 2019 at 4:12 PM PG Bug reporting form
<noreply(at)postgresql(dot)org> wrote:

> Bug reference: 16021
> Logged by: Stepan Yankevych
> Email address: stepya(at)ukr(dot)net
> PostgreSQL version: 11.5
> Operating system: CentOS Linux release 7.3.1611 (Core)
> Description:
> As far as I can see the issue has been fixed in 11.5 with following
> resolution:
> Ignore partitions that are foreign tables when creating indexes on
> partitioned tables (Álvaro Herrera)
> Previously an error was thrown on encountering a foreign-table partition,
> but that's unhelpful and doesn't protect against any actual problem.
> But I still can't create Pk on partitioned table
> See details:
> SELECT version();
> PostgreSQL 11.5 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623
> (Red Hat 4.8.5-36), 64-bit
> ALTER TABLE fix_capture.fix_message_json ADD CONSTRAINT fix_message_json_pk
> PRIMARY KEY (fix_message_id,date_id);
> SQL Error [42809]: ERROR: cannot create unique index on partitioned table
> "fix_message_json"
> Detail: Table "fix_message_json" contains partitions that are foreign
> tables.
> Have I missed something?

As I said in a previous mail, this is a limitation, not a bug.

Best regards,
Etsuro Fujita

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