From: "Jim Buttafuoco" <jim@contactbda.com>
To: Aaron Bingham <bingham@cenix-bioscience.com>,
	pgsql-sql@postgresql.org
Reply-To: jim@contactbda.com
Subject: Re: Generating a range of integers in a query
Date: Wed, 13 Jul 2005 09:22:32 -0400
Message-Id: <20050713132129.M45696@contactbda.com>
In-Reply-To: <l87jfvcbml.fsf@lynx.cenix-bioscience.com>
References: <l87jfvcbml.fsf@lynx.cenix-bioscience.com>
MIME-Version: 1.0
Content-Type: text/plain;
	charset=iso-8859-1


I use the following function which returns a date series.  You can modify it to return an int series instead

create or replace function alldates(date,date) returns setof date
as
'
declare
        s alias for $1;
        e alias for $2;
        d date;
begin
        d := s;

        while d <= e
        LOOP
                return next d;
                select d + \'1 day\'::interval into d;
        END LOOP;

        return null;
end;
'
LANGUAGE 'plpgsql'
;

select * from alldates('2004-07-01','2004-08-10');


---------- Original Message -----------
From: Aaron Bingham <bingham@cenix-bioscience.com>
To: pgsql-sql@postgresql.org
Sent: Wed, 13 Jul 2005 11:13:06 +0200
Subject: [SQL] Generating a range of integers in a query

> Hello,
> 
> I've got an interesting problem: I need to select all possible values
> of an attribute that do /not/ occur in the database.
> 
> This would be easy (in my case at least) if there were a way to
> generate a table containing all integers between 1 and n, where n is
> the result of a subquery.  In my case, n will be at most a few
> hundred.  I would like to be able to generate this table as a
> subquery.  Any ideas?
> 
> Thanks,
> 
> -- 
> --------------------------------------------------------------------
> Aaron Bingham
> Senior Software Engineer
> Cenix BioScience GmbH
> --------------------------------------------------------------------
> 
> ---------------------------(end of broadcast)---------------------------
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> 
>                http://www.postgresql.org/docs/faq
------- End of Original Message -------