[postgis-users] dissolve polygons

[RAVI KUMAR]

Hi All,
I have dissolved polygons after reclasifying attribute (rocktype), such that redundant 
boundaries are removed, with the following command in PostGIS.

CREATE TABLE geo2 with oids AS select rocktype, geomunion(geometry) from geo group by rocktype; 

but I am unable to port it in OpenJUMP.
where have I go9ne wrong?
Ravi Kumar

       
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