From: | "Josh Berkus" <josh(at)agliodbs(dot)com> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Re: Adding an INTERVAL to a variable |
Date: | 2001-08-07 15:38:08 |
Message-ID: | web-97981@davinci.ethosmedia.com |
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Thread: | |
Lists: | pgsql-sql |
Graham,
> GC> SELECT Invoices.InvoiceDate + INTERVAL Acct.AverageDaysToPay
> 'Days'
Actually, all you're missing is some punctuation. Don't skimp on the ::
and () ! Plus, you should use explicit CASTs wherever you remember
them:
SELECT Invoices.InvoiceDate + INTERVAL(CAST(Acct.AverageDaysToPay AS
VARCHAR) || ' days');
Will work fine. Here I've explicitly cast the Average Days integer (if
it's NUMERIC or FLOAT, you will have to use TO_CHAR()) to varchar, then
concatinated it with the word "days". *Then* I convert it to INTERVAL,
which will recognize '# days' as a valid expression.
IMHO, you've been lucky being able to skip the parens and CASTs so far;
get used to using them.
-Josh
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