Re: constraint help

Maybe natural join is what you want?

On Wed, 14 Apr 2004, Dennis Gearon wrote:

> I will have a table with, among other things, two time columns.
> As per my last post, I will be using a variable time for the day-to-day
> boundary, versus the traditional 12pm.
> What I want to be able to do upon insert of a record with a pair of
> times is to determine if the day to day boundary is between the times
> that are in the record, and reject the record if that is true.
> For example, if the system wide constant for the day-to-day boundary
> were 4AM local time, and I submitted a record like so:
>     INSERT INTO my_table(start_time, end_time) VALUES( '12:00'::TIME,
> '14:30'::TIME );
>
> that should succeed. However:
>     INSERT INTO my_table(start_time, end_time) VALUES( '12:00'::TIME,
> '5:00'::TIME );
>
> should fail.
> Any ideas wold be most appreciated.
>
>
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