Re: ANY_VALUE aggregate - Mailing list pgsql-hackers

From Pantelis Theodosiou
Subject Re: ANY_VALUE aggregate
Date
Msg-id CAE3TBxzBvf+mqUtG=4BF=xt0Wg_dkx1Ohq2Wa=FAr5te24KbYQ@mail.gmail.com
Whole thread Raw
In response to Re: ANY_VALUE aggregate  ("David G. Johnston" <david.g.johnston@gmail.com>)
Responses Re: ANY_VALUE aggregate
List pgsql-hackers
On Tue, Dec 6, 2022 at 4:57 AM David G. Johnston
<david.g.johnston@gmail.com> wrote:
...
>
>
> I'm referring to the query:
>
> select any_value(v order by v) from (values (2),(1),(3)) as vals (v);
> // produces 1, per the documented implementation-defined behavior.
>
> Someone writing:
>
> select any_value(v) from (values (2),(1),(3)) as vals (v) order by v;
>
> Is not presently, nor am I saying, promised the value 1.
>

Shouldn't the 2nd query be producing an error, as it has an implied
GROUP BY () - so column v cannot appear (unless aggregated) in SELECT
and ORDER BY?



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