[postgis-devel] Re: Btree semantic (was: [postgis-users] Strange behaviour of = operator)

[strk at refractions.net]

On Thu, Feb 09, 2006 at 08:49:13AM -0800, Paul Ramsey wrote:
> Sorry, I missed what the semantic is.  Is it geometries with  
> identical vertex lists and vertex orders are equal?  Or is  
> directionality ignored?  Or is geometric equivalence considered  
> ( LINESTRING(0 0, 5 5) == LINESTRING(0 0, 3 3, 5 5) )?
> 
> For ordering, I can't think of an obviously useful system. Order on  
> minx(bbox())?

Current semantic is equality is bbox equality and order
is minx,miny (or similar)

--strk;