[postgis-users] function xmin(geometry) is not unique

[strk at refractions.net]

On Thu, Mar 03, 2005 at 10:44:20PM -0800, Ron Mayer wrote:
> 
> Queries that use "xmin(the_geom)" seem to have worked in earlier
> versions but recently seem to be failing with the error message
> "function xmin(geometry) is not unique".
> 
> Is this expected, or am I doing something wrong.  It's a clean
> install of postgresql and postgis and- well, the whole OS.
> 
> The workaround  "xmin(box2d(the_geom))"  works fine for me; so
> it's not really a problem.  Just a difference I noticed and I'm
> wondering why the change; or if its a problem of my environment.

We have two implicit casts:
	geometry->box2d
	geometry->box3d
The xmin() is defined for both...
A solution could be to drop the IMPLICIT geometry->box3d one...

--strk;

> 
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