From: Lowell Hought <lowell.hought@gmail.com>
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Subject: Re: BUG #18950: pgsql function that worked in Postgresql 16 does not
 return in Postgresql 17
Date: Sat, 7 Jun 2025 20:40:32 -0500
Message-Id: <75D714EA-CD1E-4F80-A2E8-29E378EC2200@gmail.com>
References: <e9eb5136fb60188fc61c110e9706709fc13638e0.camel@cybertec.at>
Cc: pgsql-bugs@lists.postgresql.org
In-Reply-To: <e9eb5136fb60188fc61c110e9706709fc13638e0.camel@cybertec.at>
To: Laurenz Albe <laurenz.albe@cybertec.at>
Archived-At: 
 <https://www.postgresql.org/message-id/75D714EA-CD1E-4F80-A2E8-29E378EC2200%40gmail.com>
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If I run the query outside of the function it works as expected.  But the fu=
nction never returns.

Lowell

> On Jun 7, 2025, at 7:27=E2=80=AFPM, Laurenz Albe <laurenz.albe@cybertec.at=
> wrote:
>=20
> =EF=BB=BFOn Sat, 2025-06-07 at 16:08 +0000, PG Bug reporting form wrote:
>> PostgreSQL version: 17.5
>> Operating system:   Red Hat Enterprise Linux release 8.10 (Ootpa)
>>=20
>> A pgsql function that returns Table is relatively simple.  It accepts two=

>> arguments; a date and an interval.  It uses these to arguments in a query=

>> that returns a result set.  This function worked in Postgresql 16.1 and
>> Postgresql 16.9.  However, it does not work in versions 17.0 nor in 17.5
>>=20
>> [function definition]
>>=20
>> This is the first time I have ever encountered a bug and so I have no
>> experience with reporting it.
>=20
> Your function essentially is running a query.
> If you run that query outside of the function, does it finish on time?
> If not, you have a simpler problem to tackle.
>=20
> It need not necessarily be a bug if some queries perform worse in a later
> PostgreSQL version.  There are too many factors involved in the execution
> of a complicated query.  To give help, we'd need at least the EXPLAIN
> output from the query and the EXPLAIN (ANALYZE, BUFFERS) output from the
> query on the old version.
>=20
> Yours,
> Laurenz Albe