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From: Eric Ridge <[email protected]>
To: pgsql-general <[email protected]>
Subject: Re: pg18 bug?  SELECT query doesn't work
Date: Tue, 6 Jan 2026 10:52:56 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

> On Jan 6, 2026, at 10:22 AM, Eric Ridge <[email protected]> wrote:
> 
> Here's a reduced test case:

Here's an even more reduced test case.  No tables or data:

# SELECT * FROM (SELECT upper(unnest(ARRAY['cat', 'dog'])) as animal FROM generate_series(1, 10) GROUP BY 1) x WHERE animal ilike 'c%';

pg15 returns:

 animal  
--------
 CAT
(1 row)

and pg18 says:

# SELECT * FROM (SELECT upper(unnest(ARRAY['cat', 'dog'])) as animal FROM generate_series(1, 10) GROUP BY 1) x WHERE animal ilike 'c%';
ERROR:  set-valued function called in context that cannot accept a set
LINE 1: SELECT * FROM (SELECT upper(unnest(ARRAY['cat', 'dog'])) as ...
                                    ^

Thanks!

eric

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