Re: Help with simple function

Instead of:

interval "numDays day"

use:

(numDays * (interval '1 day'))

Also, note that in your "select to_char...." you have misspelled (sp?)
interval as "inteval".

And last but not least, you can do simple day addition and subtraction
with dates using integers. For example:

> select '2005-12-26'::date + 8;

returns '2006-01-03'. However, I'm not sure if that will work with
7.3.x. Good luck with your 8.x install!

Jason

________________________________

From: pgsql-admin-owner(at)postgresql(dot)org
[mailto:pgsql-admin-owner(at)postgresql(dot)org] On Behalf Of Chris Hoover
Sent: Wednesday, December 28, 2005 8:49 AM
To: pgsql-admin(at)postgresql(dot)org
Subject: [SPAM] - [ADMIN] Help with simple function - Bayesian Filter
detected spam

I need some help. I am trying to get a very simple function written to
help our developers. Unfortunetly, the language we are developing in is
giving us some grief over trying to do a "select to_char((current_date -
inteval '1 day'),'yyyymmdd') into x". It is complaining about the use
of the work interval.

Anyway, I thought, no problem, I'll just create a date increment and
date decrement set of functions. However, I can not get them to work.
Can someone please point out what is wrong?

CREATE OR REPLACE FUNCTION "public"."date_dec" (date, integer) RETURNS
varchar AS'
declare
startDate alias for $1;
numDays alias for $2;
retDate varchar(8);
begin
select to_char((startDate - interval ''numDays day''),''yyyymmdd'')
into retDate;
return retDate;
end;
'LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER;

When I try to run this, it complains about numDays - "Error: Bad
interval external representation 'numDays day'". Is there anyway around
this? I am trying to keep the function generic so that our developers
can use it to calculate any date range.

Thanks for any help,

Chris

PG7.3.4 (8.1.1 upgrade happening next month)