ASTERIXDB-865: fix query compilation for if-else expression.

Change-Id: I80e7995e814180fe567818263c79493901af284c
Reviewed-on: https://asterix-gerrit.ics.uci.edu/703
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>
diff --git a/asterix-app/src/test/resources/optimizerts/results/query-ASTERIXDB-1203.plan b/asterix-app/src/test/resources/optimizerts/results/query-ASTERIXDB-1203.plan
new file mode 100644
index 0000000..9dc7a8a
--- /dev/null
+++ b/asterix-app/src/test/resources/optimizerts/results/query-ASTERIXDB-1203.plan
@@ -0,0 +1,36 @@
+-- DISTRIBUTE_RESULT  |PARTITIONED|
+  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+    -- STREAM_PROJECT  |PARTITIONED|
+      -- STREAM_SELECT  |PARTITIONED|
+        -- STREAM_PROJECT  |PARTITIONED|
+          -- UNNEST  |PARTITIONED|
+            -- STREAM_PROJECT  |PARTITIONED|
+              -- ASSIGN  |PARTITIONED|
+                -- SUBPLAN  |PARTITIONED|
+                        {
+                          -- AGGREGATE  |LOCAL|
+                            -- AGGREGATE  |LOCAL|
+                              -- STREAM_SELECT  |LOCAL|
+                                -- ASSIGN  |LOCAL|
+                                  -- UNNEST  |LOCAL|
+                                    -- ASSIGN  |LOCAL|
+                                      -- ASSIGN  |LOCAL|
+                                        -- STREAM_SELECT  |LOCAL|
+                                          -- NESTED_TUPLE_SOURCE  |LOCAL|
+                        }
+                  -- SUBPLAN  |PARTITIONED|
+                          {
+                            -- AGGREGATE  |LOCAL|
+                              -- ASSIGN  |LOCAL|
+                                -- ASSIGN  |LOCAL|
+                                  -- ASSIGN  |LOCAL|
+                                    -- ASSIGN  |LOCAL|
+                                      -- STREAM_SELECT  |LOCAL|
+                                        -- NESTED_TUPLE_SOURCE  |LOCAL|
+                          }
+                    -- ASSIGN  |PARTITIONED|
+                      -- STREAM_PROJECT  |PARTITIONED|
+                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                          -- DATASOURCE_SCAN  |PARTITIONED|
+                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|