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From: Tom Lane <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: Re: The document contains false statements
Date: Sat, 13 Sep 2025 19:25:08 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

PG Doc comments form <[email protected]> writes:
> The following documentation comment has been logged on the website:
> Page: https://www.postgresql.org/docs/17/sql-createfunction.html
> Description:

>> This is effectively another way of declaring a named OUT parameter

> Actually OUT works twice slower in compare to RETURNS TABLE

You stopped reading halfway through that sentence... it says

    This is effectively another way of declaring a named OUT parameter,
    except that RETURNS TABLE also implies RETURNS SETOF.

The difference between a set-returning and not-set-returning
function might explain what you're seeing, particularly because
the rules for inlining SQL functions are different in the two
cases.

A documentation comment is not the place to pursue this further,
but you could ask for help on our pgsql-performance mailing list.

			regards, tom lane

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