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help / color / mirror / Atom feedFrom: Ron Johnson <[email protected]>
To: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: Allowed to return possibly TOASTed datums?
Date: Sat, 14 Dec 2024 13:13:55 -0500
Message-ID: <CANzqJaCngKMjcxtzHPggWV3mQU8U2E0zqxDtkznSpQbmPgTCgg@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
<[email protected]>
On Sat, Dec 14, 2024 at 12:02 PM Tom Lane <[email protected]> wrote:
> Jan Behrens <[email protected]> writes:
> > Is it allowed to use the following function, assuming the data type is
> > TOASTable?
>
> > PG_FUNCTION_INFO_V1(mytype_pos);
> > Datum mytype_pos(PG_FUNCTION_ARGS) {
> > PG_RETURN_DATUM(GETARG_DATUM(0));
> > }
>
> Absolutely. You can find things equivalent to that in the
> core code, I think.
>
(I'm not a developer, so this is a curiosity question, not a challenge.)
Since the purpose of TOAST is just (I think) to store "large field values"
on disk by dividing into multiple chunks, what would be the purpose of
returning the TOASTed value to Jan's function?
--
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!
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Subject: Re: Allowed to return possibly TOASTed datums?
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