Postgis and EXPRESSION

[Stefan Schwarzer]

Hi,

I migrated from mysql to postgres/postgis and update now all my map- 
queries. But I have a problem getting it working. I wonder if this is  
a major problem or some minor issue. The doc says :

"Logical expressions allow you to build fairly complex tests based on  
one or more attributes and therefore are only available with shapefiles"

So, i would almost presume that using EXPRESSIONS is not possible via  
postgis. But I can't imagine that this is true... In the moment it  
runs the query but with no result - meaning that it "ignores" the  
epression. I couldn't find anything similar in the archives either...


	LAYER
		NAME bg_shape
		CONNECTIONTYPE postgis
		CONNECTION 'user=xxx password=xxx dbname=xxx' 			
		TYPE POLYGON
		DATA 'the_geom FROM (SELECT countries.the_geom AS the_geom,  
regions_view.name AS name, countries.oid AS oid FROM countries,  
regions_view WHERE countries.geo_region = regions_view.id) AS foo  
USING UNIQUE oid USING srid=-1'
		CLASSITEM 'name'
		CLASS
			NAME ''
			EXPRESSION ([name] ne 'Africa')
			OUTLINECOLOR 230 230 230
			COLOR 230 230 230
		END
	END  # LAYER


Thanks for any help!

Stef

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