Re: Time span conversion function

Kris Jurka wrote:

>On Sat, 15 Jan 2005, Brendan Jurd wrote:
>
>
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>> > SELECT time_span( 'minute', now(), interval '10:43:55' );
>>643
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>The timestamp argument to this version of the function seems completely
>irrelevent.
>
>Kris Jurka
>
>
I don't think so. As I pointed out in the OP, to make this function
work properly you need to define a startpoint and an endpoint. The
version of the function which accepts (text, timestamp, interval)
arguments is really just using another notation to achieve the same
thing - startpoint and endpoint.

The timestamp argument is only irrelevant if you're willing to assume
now() is going to be the startpoint, which is not a fair assumption
IMO. I would rather give the caller the freedom of defining the
startpoint himself, in either notation.

Of course, it would be possible to create a shorthand version of the
function which expects (text, interval), and passes directly to
time_span($1, now(), $2).

Does that resolve your concern? If not please explain it more fully.

BJ