diff --git a/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-1.plan b/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-1.plan
index 563a75b..c65c71c 100644
--- a/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-1.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-1.plan
@@ -12,12 +12,10 @@
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                         -- ASSIGN  |PARTITIONED|
                           -- STREAM_PROJECT  |PARTITIONED|
-                            -- ASSIGN  |PARTITIONED|
-                              -- STREAM_PROJECT  |PARTITIONED|
+                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                              -- BTREE_SEARCH  |PARTITIONED|
                                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                  -- BTREE_SEARCH  |PARTITIONED|
-                                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                      -- STABLE_SORT [$$15(ASC)]  |PARTITIONED|
-                                        -- HASH_PARTITION_EXCHANGE [$$15]  |PARTITIONED|
-                                          -- UNNEST  |UNPARTITIONED|
-                                            -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|
+                                  -- STABLE_SORT [$$11(ASC)]  |PARTITIONED|
+                                    -- HASH_PARTITION_EXCHANGE [$$11]  |PARTITIONED|
+                                      -- UNNEST  |UNPARTITIONED|
+                                        -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-2.plan b/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-2.plan
index ba4c536..25b3396 100644
--- a/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-2.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-2.plan
@@ -12,19 +12,16 @@
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                         -- ASSIGN  |PARTITIONED|
                           -- STREAM_PROJECT  |PARTITIONED|
-                            -- ASSIGN  |PARTITIONED|
+                            -- STREAM_SELECT  |PARTITIONED|
                               -- STREAM_PROJECT  |PARTITIONED|
-                                -- STREAM_SELECT  |PARTITIONED|
-                                  -- ASSIGN  |PARTITIONED|
-                                    -- STREAM_PROJECT  |PARTITIONED|
-                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                        -- BTREE_SEARCH  |PARTITIONED|
-                                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                            -- STABLE_SORT [$$19(ASC)]  |PARTITIONED|
-                                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                                -- STREAM_PROJECT  |PARTITIONED|
-                                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                                    -- BTREE_SEARCH  |PARTITIONED|
-                                                      -- BROADCAST_EXCHANGE  |PARTITIONED|
-                                                        -- UNNEST  |UNPARTITIONED|
-                                                          -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|
+                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                  -- BTREE_SEARCH  |PARTITIONED|
+                                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                      -- STABLE_SORT [$$13(ASC)]  |PARTITIONED|
+                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                          -- STREAM_PROJECT  |PARTITIONED|
+                                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                              -- BTREE_SEARCH  |PARTITIONED|
+                                                -- BROADCAST_EXCHANGE  |PARTITIONED|
+                                                  -- UNNEST  |UNPARTITIONED|
+                                                    -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-3.plan b/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-3.plan
index 55fc23c..37ccaf2 100644
--- a/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-3.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/disjunction-to-join-delete-3.plan
@@ -9,20 +9,18 @@
                 -- INSERT_DELETE  |PARTITIONED|
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                     -- MATERIALIZE  |PARTITIONED|
-                      -- HASH_PARTITION_EXCHANGE [$$12]  |PARTITIONED|
+                      -- HASH_PARTITION_EXCHANGE [$$10]  |PARTITIONED|
                         -- ASSIGN  |PARTITIONED|
                           -- STREAM_PROJECT  |PARTITIONED|
-                            -- ASSIGN  |PARTITIONED|
-                              -- STREAM_PROJECT  |PARTITIONED|
-                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                  -- HYBRID_HASH_JOIN [$$15][$$13]  |PARTITIONED|
-                                    -- HASH_PARTITION_EXCHANGE [$$15]  |PARTITIONED|
-                                      -- UNNEST  |UNPARTITIONED|
-                                        -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|
-                                    -- HASH_PARTITION_EXCHANGE [$$13]  |PARTITIONED|
-                                      -- STREAM_PROJECT  |PARTITIONED|
-                                        -- ASSIGN  |PARTITIONED|
+                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                              -- HYBRID_HASH_JOIN [$$11][$$9]  |PARTITIONED|
+                                -- HASH_PARTITION_EXCHANGE [$$11]  |PARTITIONED|
+                                  -- UNNEST  |UNPARTITIONED|
+                                    -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|
+                                -- HASH_PARTITION_EXCHANGE [$$9]  |PARTITIONED|
+                                  -- STREAM_PROJECT  |PARTITIONED|
+                                    -- ASSIGN  |PARTITIONED|
+                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                        -- DATASOURCE_SCAN  |PARTITIONED|
                                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                            -- DATASOURCE_SCAN  |PARTITIONED|
-                                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/scan-delete-all.plan b/asterix-app/src/test/resources/optimizerts/results/scan-delete-all.plan
index c2173fb..5b1d2f8 100644
--- a/asterix-app/src/test/resources/optimizerts/results/scan-delete-all.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/scan-delete-all.plan
@@ -7,8 +7,7 @@
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               -- ASSIGN  |PARTITIONED|
                 -- STREAM_PROJECT  |PARTITIONED|
-                  -- ASSIGN  |PARTITIONED|
-                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                      -- DATASOURCE_SCAN  |PARTITIONED|
-                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                    -- DATASOURCE_SCAN  |PARTITIONED|
+                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
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 691761d..ca4a6c2 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
@@ -25,9 +25,8 @@
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             -- ASSIGN  |PARTITIONED|
                               -- STREAM_PROJECT  |PARTITIONED|
-                                -- ASSIGN  |PARTITIONED|
-                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                    -- BTREE_SEARCH  |PARTITIONED|
-                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                        -- ASSIGN  |PARTITIONED|
-                                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                  -- BTREE_SEARCH  |PARTITIONED|
+                                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                      -- ASSIGN  |PARTITIONED|
+                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/scan-delete.plan b/asterix-app/src/test/resources/optimizerts/results/scan-delete.plan
index cfe5d35..790ac4f 100644
--- a/asterix-app/src/test/resources/optimizerts/results/scan-delete.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/scan-delete.plan
@@ -6,11 +6,9 @@
           -- MATERIALIZE  |PARTITIONED|
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               -- ASSIGN  |PARTITIONED|
-                -- STREAM_PROJECT  |PARTITIONED|
-                  -- ASSIGN  |PARTITIONED|
-                    -- STREAM_SELECT  |PARTITIONED|
-                      -- ASSIGN  |PARTITIONED|
+                -- STREAM_SELECT  |PARTITIONED|
+                  -- STREAM_PROJECT  |PARTITIONED|
+                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                      -- DATASOURCE_SCAN  |PARTITIONED|
                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                          -- DATASOURCE_SCAN  |PARTITIONED|
-                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan b/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan
index e2e6dff..bc9f1d1 100644
--- a/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan
@@ -7,9 +7,8 @@
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               -- ASSIGN  |PARTITIONED|
                 -- STREAM_PROJECT  |PARTITIONED|
-                  -- ASSIGN  |PARTITIONED|
-                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                      -- BTREE_SEARCH  |PARTITIONED|
-                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                          -- ASSIGN  |PARTITIONED|
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                    -- BTREE_SEARCH  |PARTITIONED|
+                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                        -- ASSIGN  |PARTITIONED|
+                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-ngram-index-search-in-delete.plan b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-ngram-index-search-in-delete.plan
index c882d81..31de832 100644
--- a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-ngram-index-search-in-delete.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-ngram-index-search-in-delete.plan
@@ -11,11 +11,9 @@
                     -- MATERIALIZE  |PARTITIONED|
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                         -- ASSIGN  |PARTITIONED|
-                          -- STREAM_PROJECT  |PARTITIONED|
-                            -- ASSIGN  |PARTITIONED|
-                              -- STREAM_SELECT  |PARTITIONED|
-                                -- ASSIGN  |PARTITIONED|
+                          -- STREAM_SELECT  |PARTITIONED|
+                            -- STREAM_PROJECT  |PARTITIONED|
+                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                -- DATASOURCE_SCAN  |PARTITIONED|
                                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                    -- DATASOURCE_SCAN  |PARTITIONED|
-                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                    -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-rtree-index-search-in-delete.plan b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-rtree-index-search-in-delete.plan
index b69dfa3..0c406e2 100644
--- a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-rtree-index-search-in-delete.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-rtree-index-search-in-delete.plan
@@ -13,11 +13,9 @@
                         -- MATERIALIZE  |PARTITIONED|
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             -- ASSIGN  |PARTITIONED|
-                              -- STREAM_PROJECT  |PARTITIONED|
-                                -- ASSIGN  |PARTITIONED|
-                                  -- STREAM_SELECT  |PARTITIONED|
-                                    -- ASSIGN  |PARTITIONED|
+                              -- STREAM_SELECT  |PARTITIONED|
+                                -- STREAM_PROJECT  |PARTITIONED|
+                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                    -- DATASOURCE_SCAN  |PARTITIONED|
                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                        -- DATASOURCE_SCAN  |PARTITIONED|
-                                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
+                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-secondary-btree-index-search-in-delete.plan b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-secondary-btree-index-search-in-delete.plan
index c882d81..31de832 100644
--- a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-secondary-btree-index-search-in-delete.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-secondary-btree-index-search-in-delete.plan
@@ -11,11 +11,9 @@
                     -- MATERIALIZE  |PARTITIONED|
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                         -- ASSIGN  |PARTITIONED|
-                          -- STREAM_PROJECT  |PARTITIONED|
-                            -- ASSIGN  |PARTITIONED|
-                              -- STREAM_SELECT  |PARTITIONED|
-                                -- ASSIGN  |PARTITIONED|
+                          -- STREAM_SELECT  |PARTITIONED|
+                            -- STREAM_PROJECT  |PARTITIONED|
+                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                -- DATASOURCE_SCAN  |PARTITIONED|
                                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                    -- DATASOURCE_SCAN  |PARTITIONED|
-                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                    -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-word-index-search-in-delete.plan b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-word-index-search-in-delete.plan
index c882d81..31de832 100644
--- a/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-word-index-search-in-delete.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/skip-index/skip-word-index-search-in-delete.plan
@@ -11,11 +11,9 @@
                     -- MATERIALIZE  |PARTITIONED|
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                         -- ASSIGN  |PARTITIONED|
-                          -- STREAM_PROJECT  |PARTITIONED|
-                            -- ASSIGN  |PARTITIONED|
-                              -- STREAM_SELECT  |PARTITIONED|
-                                -- ASSIGN  |PARTITIONED|
+                          -- STREAM_SELECT  |PARTITIONED|
+                            -- STREAM_PROJECT  |PARTITIONED|
+                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                -- DATASOURCE_SCAN  |PARTITIONED|
                                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                    -- DATASOURCE_SCAN  |PARTITIONED|
-                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                    -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterix-app/src/test/resources/optimizerts/results/sort-cust.plan b/asterix-app/src/test/resources/optimizerts/results/sort-cust.plan
index 5452f6f..66e6049 100644
--- a/asterix-app/src/test/resources/optimizerts/results/sort-cust.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/sort-cust.plan
@@ -8,10 +8,9 @@
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 -- STABLE_SORT [$$7(ASC)]  |PARTITIONED|
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                    -- STREAM_PROJECT  |PARTITIONED|
-                      -- ASSIGN  |PARTITIONED|
-                        -- STREAM_PROJECT  |PARTITIONED|
-                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                            -- DATASOURCE_SCAN  |PARTITIONED|
-                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                    -- ASSIGN  |PARTITIONED|
+                      -- STREAM_PROJECT  |PARTITIONED|
+                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                          -- DATASOURCE_SCAN  |PARTITIONED|
+                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|