           c.valid_end_date,
           c.invalid_reason
      FROM v5dev.concept c,
-          v5dev.concept_class_conversion ccc,
+          t_concept_class_conversion ccc,
           v5dev.vocabulary_conversion vc
     WHERE     c.concept_class_id = ccc.concept_class_id_new
           AND c.vocabulary_id = vc.vocabulary_id_v5;
 
-COMMIT;		  
+COMMIT;	
+
+DROP TABLE t_concept_class_conversion PURGE;	  
 
 INSERT /*+ APPEND */
       INTO  concept_relationship (CONCEPT_ID_1,

           MINUS
           SELECT relationship_id_new FROM v5dev.relationship_conversion);
COMMIT;
		   
 INSERT INTO RELATIONSHIP (RELATIONSHIP_ID,
                          RELATIONSHIP_NAME,

    WHERE r.relationship_id = rc.relationship_id_new;

COMMIT;	
------
INSERT /*+ APPEND */
      INTO  concept_ancestor (ANCESTOR_CONCEPT_ID,
                              DESCENDANT_CONCEPT_ID,
