Thank you for answering my question.
I made a careless mistake.
regards,
Daniel
On Mon, 22 Dec 2003, Tom Lane wrote:
> Daniel Lau <iedaniel@ust.hk> writes:
> > I was to extract the '_lines' (path) if the lines are contained or on by a
> > box-like polygon. The result turns wrong if the box-like polygon is
> > changed from a square (x_max = y_max) to a rectangle (x_max <> y_max).
>
> The examples you give are not "box-like"; they are in fact just line
> segments. You need four points to define a box-like polygon.
>
> AFAICS the quoted example is correct behavior.
>
> regards, tom lane
>
