Way to avoid using Spatial Cartridge?

Question

I have a table that stores the coordinate information of images by storing the coordinate information of the four corners of the image. I need to search the table for all cases where a given coordinate point is in the 4 corner coordinate points of the image. Can I do this without using Spatial Cartridge? Is there some easy function that can do this?

Answer 1

Why do you want to avoid using the cartridge?
If you have Locator or Oracle Spatial installed but don't want to alter
the table's definition I would create a view and construct an SDO_GEOMETRY
from the coordinates columns in the table. I would use a function based index
to index the generated geometry. Then you can search to your heart's content
using native Oracle Spatial capabilities that would not require to you to write code!
create or replace view foo_polygon
as
select
foo.attributes....,
mdsys.sdo_geometry(2003,SRID?,NULL,
MDSYS.SDO_ELEM_INFO(1,1003,1),
MDSYS.SDO_ORDINATES(x1,y1,x1,y2,x2,y2,x2,y1,x1,y2)) as geom
from foo;
insert into user_sdo_geom_metadata (table_name,column_name,srid,diminfo)
values ('FOO','GEOM,SRID?,
mdsys.sdo_dim_array(
-- No idea what your X data range is but assume it is -180 -> 180
mdsys.sdo_dim_element('X', -180,180, 0.5),
-- No idea what your Y range is but assume it is -90 -> 90
mdsys.sdo_dim_element('Y', -90, 90, 0.5)
create index foo_polygon_ndx
on
foo( mdsys.sdo_geometry(2003,SRID?,NULL,
MDSYS.SDO_ELEM_INFO(1,1003,1),
MDSYS.SDO_ORDINATES(x1,y1,x1,y2,x2,y2,x2,y1,x1,y2)))
indextype is mdsys.spatial_index
parameters ('sdo_indx_dims=2');
Then query like ....
SELECT count(*)
FROM foo_polygon A
WHERE MDSYS.SDO_FILTER(
A.SHAPE,
MDSYS.SDO_GEOMETRY(2003,NULL,NULL,
MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,3),
MDSYS.SDO_ORDINATE_ARRAY(&llx,&lly,&urx,&ury)),
'querytype=window') = 'TRUE';
S