From: Tom Lane <tgl@sss.pgh.pa.us>
To: Markus Schaber <schabi@logix-tt.com>
Cc: PostgreSQL SQL List <pgsql-sql@postgresql.org>
Subject: Re: Slightly confused error message
Date: Fri, 28 Apr 2006 12:07:04 -0400
Message-ID: <1612.1146240424@sss.pgh.pa.us> (raw)
In-Reply-To: <44523BF1.1080307@logix-tt.com>
References: <44523BF1.1080307@logix-tt.com>
Markus Schaber <schabi@logix-tt.com> writes:
> I just stumbled over a slightly confused error message:
> mydb=# select count(*),coverage_area from myschema.streets except select
> cd as coverage_area from countryref.disks group by streets.coverage_area;
> ERROR: column "streets.coverage_area" must appear in the GROUP BY
> clause or be used in an aggregate function
> As the query looks, streets.coverage_area is actually used in the GROUP BY.
The complaint is 100% accurate; the subquery that it's unhappy about is
select count(*),coverage_area from myschema.streets
which is an aggregating query, but coverage_area is being used outside
an aggregate without having been grouped by.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, schabi@logix-tt.com
Subject: Re: Slightly confused error message
In-Reply-To: <1612.1146240424@sss.pgh.pa.us>
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