Re: Interval FAQ - please review

Jeff,

> Why not just include examples of DATEDIFF and DATEADD functions?
> For example:
> CREATE FUNCTION datediff(timestamp, timestamp)
> RETURNS integer AS '
> BEGIN
> RETURN $2 - $1;
> END;
> ' LANGUAGE 'plpgsql';

Not a bad idea.  Unfortunately, DATEDIFF & DATEADD are more complicated
than that.  More importantly, I don't want to get into Function design
in this article, which is aimed at newbies.

If, however, anyone *does* have an online sample of one or both of these
two functions, I'd love to link to it from the article.

-Josh

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