Re: Re: Adding an INTERVAL to a variable - Mailing list 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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