SDO_NN() ISSUE -10g

Question

DEAR EXPERTS
SQL> SELECT /*+ INDEX(S SUPP_IDX) */
L.COMPCD,
L.ZIPCD,
S.SUPPID,
'M'
FROM Loc_zip L,Supp_zip S
WHERE SDO_NN(L.LOC,S.LOC,'sdo_batch_size=1332')= 'TRUE'
AND L.compcd = S.compcd
AND ROWNUM<=5 ;
SELECT /*+ INDEX(S SUPP_IDX1) */
ERROR at line 1:
ORA-13249: SDO_NN cannot be evaluated without using index
ORA-06512: at "MDSYS.MD", line 1723
ORA-06512: at "MDSYS.MDERR", line 17
ORA-06512: at "MDSYS.PRVT_IDX", line 9
Loc_zip TABLE WITH LOC_IDX
Supp_zip TABLE WITH SUPP_IDX
EACH ROW IN LOC_ZIP WILL MATCH 1332 ROW IN SUPP_ZIP
I NEED NEAREST 5 SUPPLIER LOCATION MY QRY ERROR AS ABOVE
Many thankx
kalinga

Answer 1

Kalinga,
This issue is documented in the Spatial Operators chapter of the Oracle Spatial documentation and also in the excellent book Pro Oracle Spatial. The recommended solution is to include the NO_INDEX hint for the attribute index and the INDEX hint for the spatial (RTree) index.
I don't know, from your SQL, if SUPP_IDX is the spatial or attribute index. Let's assume SUPP_IDX is the attribute index and SUPP_SPIDX is the spatial index then this is how you should use it:
SELECT /*+ INDEX(L SUPP_SPIDX) NO_INDEX(L SUPP_IDX) */
       L.COMPCD,
       L.ZIPCD,
       S.SUPPID,
       'M'
  FROM Loc_zip  S,
       Supp_zip L
WHERE SDO_NN(L.LOC,S.LOC,'sdo_batch_size=1332')= 'TRUE'
   AND L.compcd = S.compcd
   AND ROWNUM<=5 ;Note that I have specified the L alias as this is the table being searched. Also, you should reorder the tables in the FROM list and include the /*+ORDERED*/ hint.
Sometimes, though, I have found just the NO_INDEX and INDEX hints to be inadequate and have found use of the USE_NL or LEADING hints to be very useful. So, for your query this might help:
SELECT /*+ORDERED USE_NL(LS) */
       L.COMPCD,
       L.ZIPCD,
       S.SUPPID,
       'M'
  FROM Loc_zip  S,
       Supp_zip L
WHERE SDO_NN(L.LOC,S.LOC,'sdo_batch_size=1332')= 'TRUE'
   AND L.compcd = S.compcd
   AND ROWNUM<=5 ;Try and experiment: you will get something that works pretty quickly.
regards
Simon