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From: Tom Lane <[email protected]>
To: Krzysztof <[email protected]>
Cc: [email protected]
Subject: Re: Linux file permission for COPY TO SQL command
Date: Wed, 29 Oct 2025 15:55:53 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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Krzysztof <[email protected]> writes:
> Actually server and client are installed on the same machine.
> The file (real file) permissions are as follows:

> -rwxrwxrwx+ 1 kaj kaj 2 Oct 27 22:36 fd/fdo.txt

> The directory permissions are as follows:

> drwxrwxrwx+  4 kaj kaj     4096 Oct 27 22:36 fd

> The SQL command which tries to write to the file is this:

> copy (select key from xcg where add=false) to '/home/kaj/fd/fdo.txt';

The /home and /home/kaj directories would also need to be
world-searchable for the server to be able to write there.
(Do not make them world-writable...)

Did you notice the HINT that goes with that error message?

HINT:  COPY TO instructs the PostgreSQL server process to write a file. You may want a client-side facility such as psql's \copy.

			regards, tom lane

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