SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT for polygon geometry validation

Question

Hi,
I would like to make a validation of the polygon geometry upon a table SCHEMA.TABLE with the GEOM field, where the geometry is stored.
Can someone help me with a sample SQL sentence to fill my SCHEMA.VALIDITY table with all the detected errors that occured in the SCHEMA.TABLE?
Thanks!
Dejan

Answer 1

Greg
Have you tried scrolling down to the bottom of that section? You will see the following example (as in all descriptions in the documentation):
Examples*
The following example validates the geometry objects stored in the SHAPE column of the COLA_MARKETS table. The example includes the creation of the result table. For this example, a deliberately invalid geometry was inserted into the table before the validation was performed.
-- Is a layer valid? (First, create the result table.)
CREATE TABLE val_results (sdo_rowid ROWID, result varchar2(1000));
-- (Next statement must be on one command line.)
CALL SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT('COLA_MARKETS','SHAPE','VAL_RESULTS');
Call completed.
SQL> SELECT * from val_results;
SDO_ROWID
RESULT
Rows Processed <12>
AAABXNAABAAAKYAAC+
+13349 [Element <1>] [Ring <1>][Edge <1>][Edge <3>]+
CREATE TABLE val_results (sdo_rowid ROWID, result varchar2(1000));
would have been in your case:
CREATE TABLE schema.validity (sdo_rowid ROWID, result varchar2(1000));
CALL SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT('COLA_MARKETS','SHAPE','VAL_RESULTS');
would have been in your case:
CALL SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT('SCHEMA.TABLE','GEOM','SCHEMA.VALIDITY');
SQL> SELECT * from val_results;
would have been in your case:
SELECT * from schema.validity;
If you would like to have your id included:
Select a.id, b.*
from schema.validity b left outer join schema.table a
on (b.sdo_rowid= a.rowid);
In order to help people making their life easier with the management of spatial metadata, spatial index and geometry validation, like yours, and possible fix up, 1Spatial has a product named Radius Check.
Have a look at the second item from the top here: http://www.oracle.com/technology/products/spatial/htdocs/spatial_partners_downloads.html
or
http://www.1spatial.com/products/radius_check/index.php
Maybe you can find it usefull.
Luc