Spatial operator issue

Question

Hallo,
I have a general question. I am using a spatial operator. There it is a general rule that the first parameter must come from a indexed table and the second need not to be indexed. As far as good. The other rule is that the first parameter should be the feature that is searched for and the second contains the query window.
If I break the first rule and want to use a non-indexed table geometry an error message ossures. My question concerns the second rule:
If I change the parameters and I set the table with the query window (and it is indexed) first what could happen the worst case?
I have such a case but I can not put the geometry table with the query window to the second parameter because the features I want to search come from the get_geometry function from the topology model and are not indexed.
Thanks in advance Tig

Answer 1

Hallo Bryan,
I am analyzing oracle spatial and the data model I have chosenfor this task is built of object tables. It is not a business solution so it does not really matter. But I have realized several times that it maybe would have been better to work with relational tables. Sometimes it is a lot more work to do to solve a problem.
I am not that happy with the following procedure:
CREATE OR REPLACE PROCEDURE berechneAdressdaten AS
CURSOR cs IS (SELECT a.HAUS_NR,a.HAUS_NR_ZUSATZ,a.STRASSE,
a.GEMEINDE_NAME,a.STRASSENNAME,a.HAK FROM
(SELECT /*+ ordered index(hausanschlusskasten_topo_tab hk stromnetz_8_idx) index(gebaeude_tab g gebaeude_flaeche_sidx) */
G.HAUS_NR, G.HAUS_NR_ZUSATZ, G.STRASSENSCHLUESSEL.STRASSE AS STRASSE,
G.STRASSENSCHLUESSEL.GEMEINDE_NAME AS GEMEINDE_NAME, G.STRASSENSCHLUESSEL.STRASSENNAME AS STRASSENNAME,
HK.HAK, SDO_NN_DISTANCE(1) DISTANCE FROM HAUSANSCHLUSSKASTEN_TOPO_TAB HK,GEBAEUDE_TAB G
WHERE SDO_NN(G.FLAECHE, HK.POSITION.GET_GEOMETRY(),'SDO_NUM_RES=1 UNIT=METER',1)='TRUE')a WHERE a.DISTANCE <=5);
BEGIN
FOR NO IN cs LOOP
UPDATE HAUSANSCHLUSSKASTEN_TAB SET GEMEINDE_NAME=NO.GEMEINDE_NAME,STRASSENNAME=NO.STRASSENNAME,STRASSE=NO.STRASSE,
HAUS_NR=NO.HAUS_NR WHERE NO.HAK=HAK_ID;
END LOOP;
END;
As I mentioned before the parameters I have given to the sdo_nn-operator I have to turn around. SDO_NN(G.FLAECHE, HK.POSITION.GET_GEOMETRY() --> g.flaeche comes from a relational indexed table and hk.position comes from a object relational table with datatype sdo_topo_geometry. For the reason that I need this procedure I build it that way but it is false in the way that g.flaeche is the query window and hk.positon is the parameter I want to select from. But I do not see another way to solve this problem and function-based indexes do not work.
Maybe somebody has an idea.
I would really appreciate!
Thanks Tig