[postgis-devel] Issue 113 in postgis: ST_Locate_Along_Measure -- just returns null for unsupported instead of throwing an error

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Status: New
Owner: ----
Labels: Type-Defect Priority-Low

New issue 113 by robe.... at cityofboston.gov: ST_Locate_Along_Measure -- just  
returns null for unsupported instead of throwing an error
http://code.google.com/p/postgis/issues/detail?id=113

What steps will reproduce the problem?
1. 	-- ST_Locate_Along_Measure LineSet3D: Start Testing LINESTRING
	SELECT ST_AsEWKT(foo1.the_geom),
ST_AsEWKT(ST_Locate_Along_Measure(foo1.the_geom, 0.5))
			
			FROM ((SELECT ST_SetSRID(ST_MakeLine(ST_MakePoint(i,j,k),
ST_MakePoint(i+k,j+k,k)),4326) As the_geom
		FROM generate_series(-10,50,20) As i
			CROSS JOIN generate_series(40,70, 20) j
			CROSS JOIN generate_series(1,2) k
			)) As foo1;


What is the expected output?
Only line with M supported.

What do you see instead? Everything returns null with no warning what so  
ever.



This is somewhat petty and I only consider this an error since the
new ST_LocateBetweenMeasures returns an error for unsupported geometries.

Don't really care if we fix it.  Just thought I would mention it to be a
pain :)



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