Re: Several issues with postgres_fdw stats import

From: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
To: Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com>
Cc: Corey Huinker <corey(dot)huinker(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Several issues with postgres_fdw stats import
Date: 2026-09-15 08:52:32
Message-ID: CAHGQGwGvA_3q7Wg7GXQkuugGZj3=kxDRjDsKgVvK1uwAxHTopQ@mail.gmail.com
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On Mon, Sep 14, 2026 at 8:12 PM Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com> wrote:
> Pushed/backpatched.

Thanks for working on this issue!

When I used v11 as the remote server, stats import via postgres_fdw
resulted in the following error. I think this should be addressed as well.

ERROR: collations are not supported by type name
CONTEXT: remote SQL command: SELECT DISTINCT ON (attname COLLATE "C")
attname, null_frac, avg_width, n_distinct, most_common_vals,
most_common_freqs, histogram_bounds, correlation, most_common_elems,
most_common_elem_freqs, elem_count_histogram, NULL, NULL, NULL FROM
pg_catalog.pg_stats WHERE schemaname = 'public' AND tablename = 't'
AND attname = ANY(ARRAY['i', 'j']) ORDER BY attname COLLATE "C",
inherited DESC

Regards,

--
Fujii Masao

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