From: Tom Lane <tgl@sss.pgh.pa.us>
To: peter.davie@convergentsolutions.com.au
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #17176: Error raised on valid query
In-reply-to: <17176-4a88906336898128@postgresql.org>
References: <17176-4a88906336898128@postgresql.org>
Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
	message dated "Thu, 02 Sep 2021 10:54:03 -0000"
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Date: Thu, 02 Sep 2021 14:52:55 -0400
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PG Bug reporting form <noreply@postgresql.org> writes:
> Hibernate is generating the following query:

> select distinct date_part('year', internalme0_.when_occurred) as col_0_0_,
> date_part('month', internalme0_.when_occurred) as col_1_0_, date_part('day',
> internalme0_.when_occurred) as col_2_0_, date_part('hour',
> internalme0_.when_occurred) as col_3_0_, date_part('minute',
> internalme0_.when_occurred) as col_4_0_ 
> from InternalMessages internalme0_ 
> group by date_part('year', internalme0_.when_occurred) , date_part('month',
> internalme0_.when_occurred) , date_part('day', internalme0_.when_occurred) ,
> date_part('hour', internalme0_.when_occurred) , date_part('minute',
> internalme0_.when_occurred) , internalme0_.when_occurred 
> order by date_part($1, internalme0_.when_occurred) asc, date_part($2,
> internalme0_.when_occurred) asc, date_part($3, internalme0_.when_occurred)
> asc, date_part($4, internalme0_.when_occurred) asc, date_part($5,
> internalme0_.when_occurred) asc

> The placeholders contain the values 'year', 'month', 'day', 'hour' and
> 'minute'.

Doesn't matter.  Those expressions are not semantically equivalent,
and your assertion of that doesn't make it so.  The query has to be
valid for any values of the placeholders.

(If you'd like to substitute specific parameter values in advance of
semantic analysis, then do it on the client side.)

			regards, tom lane