psql -f switch and "COPY ... FROM STDIN"

From: PG Doc comments form <noreply(at)postgresql(dot)org>
To: pgsql-docs(at)lists(dot)postgresql(dot)org
Cc: carsten(dot)jahn(at)bayer(dot)com
Subject: psql -f switch and "COPY ... FROM STDIN"
Date: 2020-05-11 16:40:16
Message-ID: 158921521630.649.5234337138274130122@wrigleys.postgresql.org
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Page: https://www.postgresql.org/docs/12/app-psql.html
Description:

Hi, first of all thanks for the great postgres database and its psql
utility.
Today I had some trouble using "COPY ... FROM STDIN" with CSV data piped
into the psql command, which had the "COPY" sql statement in a separate
file, referenced by the -f switch. In the end, I found out that the -f
switch leads to psql ignoring all stdin - all you get is the output "COPY
0". I think it would be worth documenting this behavior of the -f / --file
switch on the psql documentation page.
Thanks + best regards,
Carsten

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