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 <[EMAIL PROTECTED]>
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
> --------------------------------------------------------------------
>
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>
> http://www.postgresql.org/docs/faq
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