> What you meant to test is:
>
> select (date '20060101'::timestamp,
> coalesce(NULL, 'infinity'::timestamp))
> overlaps
> (date '20060102'::timestamp,
> coalesce(NULL, 'infinity'::timestamp))
>
> Which returns true.
Alban,
If first period end and second period start dates are the same, I need that in this case expression
returns true.
Is it possible to implement this using OVERLAPS operator ?
Andrus.