Updated test case results.
diff --git a/asterix-app/src/test/resources/optimizerts/results/scan-delete-rtree-secondary-index.plan b/asterix-app/src/test/resources/optimizerts/results/scan-delete-rtree-secondary-index.plan
index e1852af..51800a2 100644
--- a/asterix-app/src/test/resources/optimizerts/results/scan-delete-rtree-secondary-index.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/scan-delete-rtree-secondary-index.plan
@@ -10,7 +10,7 @@
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     -- INSERT_DELETE  |PARTITIONED|
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                        -- STABLE_SORT [$$15(ASC)]  |PARTITIONED|
+                        -- MATERIALIZE  |PARTITIONED|
                           -- HASH_PARTITION_EXCHANGE [$$15]  |PARTITIONED|
                             -- ASSIGN  |PARTITIONED|
                               -- STREAM_PROJECT  |PARTITIONED|
@@ -20,4 +20,4 @@
                                       -- BTREE_SEARCH  |PARTITIONED|
                                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                           -- ASSIGN  |PARTITIONED|
-                                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file