ORA13226 when using view with geometry created using sdo_util.simplify

Question

I have a polygon table (and spatial index) using Ora11.1 that i can query such as:
Select ID From MyTable A where (MDSYS.SDO_RELATE(A.GEOMETRY, SDO_GEOMETRY(2003, 8307, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 3), SDO_ORDINATE_ARRAY(73.091805, 18.312310, 72.250051, 19.076872)), 'mask=INSIDE+COVEREDBY+EQUAL querytype=window') = 'TRUE');
This query returns 2 rows. I have created a view:
create or replace view v_MyTable as
select id, sdo_util.simplify(geometry,20,2) as s_geometry
from MyTable;
The subsequent query returns ORA13226
Select ID From v_MyTable A where (MDSYS.SDO_RELATE(A.S_GEOMETRY, SDO_GEOMETRY(2003, 8307, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 3), SDO_ORDINATE_ARRAY(73.091805, 18.312310, 72.250051, 19.076872)), 'mask=INSIDE+COVEREDBY+EQUAL querytype=window') = 'TRUE');
If I create a view which does not use the simplify function the query works.

Answer 1

tcbalent,
This is correct behaviour if you are trying the query the view:
Select ID
  From V_MyTable A
where (MDSYS.SDO_RELATE(A.GEOMETRY, SDO_GEOMETRY(2003, 8307, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 3), SDO_ORDINATE_ARRAY(73.091805, 18.312310, 72.250051, 19.076872)), 'mask=INSIDE+COVEREDBY+EQUAL querytype=window') = 'TRUE');This is because the A.GEOMETRY is not the geometry in the original table (MyTable) but a programmatically
constructed geometry on the fly which is not indexed.
You can fix this with a function based index as follows (NOTE: This uses my own test data that is projected and not geodetic):
DROP  table myTable;
create table myTable
as
select rownum as Id, geom as geometry
from  projpoly2d
where polytype NOT IN ('COMPOUNDOUTERSHELL','VERTEXWITHARCNOHOLE');
delete from user_sdo_geom_metadata where table_name = 'MYTABLE' and column_name = 'GEOMETRY'; commit;
insert into user_sdo_geom_metadata(table_name, column_name,diminfo,srid)
select 'MYTABLE','GEOMETRY',diminfo,srid
  from user_sdo_geom_metadata
where table_name = 'PROJPOLY2D'
   and column_name = 'GEOM';
commit;
create or replace view v_MyTable
as
select id, sdo_util.simplify(geometry,20,2) as S_geometry
from MyTable;
-- Create index metadata
delete from user_sdo_geom_metadata where table_name = 'MYTABLE' and column_name = 'MDSYS.SDO_UTIL.SIMPLIFY(GEOMETRY,20,2)'; commit;
insert into user_sdo_geom_metadata(table_name, column_name,diminfo,srid)
select 'MYTABLE','MDSYS.SDO_UTIL.SIMPLIFY(GEOMETRY,20,2)',diminfo,srid
  from user_sdo_geom_metadata
where table_name = 'MYTABLE' and column_name = 'GEOMETRY';
commit;
select * from user_sdo_geom_metadata;
-- Now create index
drop   index MyTable_sgeometry_spdx;
create index MyTable_sgeometry_spdx on MyTable(MDSYS.SDO_UTIL.SIMPLIFY(GEOMETRY,20,2))
     indextype is mdsys.spatial_index parameters('sdo_indx_dims=2, layer_gtype=polygon');
Select ID
  From v_MyTable A
where (MDSYS.SDO_RELATE(A.S_GEOMETRY,
                         MDSYS.SDO_GEOMETRY(2003, NULL, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,3), MDSYS.SDO_ORDINATE_ARRAY(190000.0, 5120000.0, 640000.0, 5630000.0)),
                        'mask=INSIDE+COVEREDBY+EQUAL querytype=window') = 'TRUE');
-- Result
ID                    
5                     
1                     
4                     
2                     
6If this fixes your problem please mark this thread as answered.
regards
Simon