Sdo_aggr_union

Question

I am trying to union 2 line segments and than create a buffer around my new geomerty. I ran both queries alone and they worked but when I combined them together I get an errror. Am I missing the something in my query?
1 SELECT mdsys.sdo_buffer(SELECT sdo_geom.sdo_aggr_union(mdsys.sdoaggrtype(a.geom, 0.5))
2 FROM dime a
3 WHERE a.rcd_nbr IN('46067','46068')) geom,
4 m.diminfo, 10)
5 FROM dime, user_sdo_geom_metadata m
6* WHERE m.TABLE_NAME = 'PARCEL'))
compass>/
SELECT mdsys.sdo_buffer(SELECT sdo_geom.sdo_aggr_union(mdsys.sdoaggrtype(a.geom, 0.5))
ERROR at line 1:
ORA-00936: missing expression

Answer 1

Matt,
I didn't think shapefiles had arcs in them! Even so, perhaps the arcs are in there but are incorrect because of a tolerance issue? Have you run the data through sdo_geom.validate_geometry before trying the query? Use a query like this:
SELECT a.rcd_nbr,
             a.geom,
             sdo_geom.validate_geometry(a.geom,m.diminfo)
  FROM user_sdo_geom_metadata m,
            dime a
WHERE ( m.TABLE_NAME = 'PARCEL' and m.column_name = 'GEOM' )
     AND a.rcd_nbr IN ('46067','46068')Then, if you get validate_geometry not returning TRUE paste the geometry objects that fail to this forum for people to look at. Also, what are your sdo_tolerance values in user_sdo_geom_metadata?
Simon