Add tests for materialized views

src/test/regress/expected/views_create.out

@@ -42,3 +42,34 @@ SELECT * FROM select_filtered_view;
 
 -- dummy temp recursive view
 CREATE TEMP RECURSIVE VIEW recursive_defined_non_recursive_view(c) AS (SELECT 1);
+CREATE MATERIALIZED VIEW select_all_matview AS
+    SELECT * FROM view_test_table
+    WITH DATA;
+CREATE MATERIALIZED VIEW IF NOT EXISTS select_filtered_matview AS
+    SELECT * FROM view_test_table WHERE c = 'views'
+    WITH NO DATA;
+REFRESH MATERIALIZED VIEW select_filtered_matview;
+SELECT COUNT(*) FROM select_all_matview;
+ count
+---------------------------------------------------------------------
+     2
+(1 row)
+
+SELECT * FROM select_filtered_matview;
+ a | b |    c
+---------------------------------------------------------------------
+ 2 | 1 | views
+(1 row)
+
+SELECT COUNT(*) FROM select_all_view a JOIN select_filtered_matview b ON a.c=b.c;
+ count
+---------------------------------------------------------------------
+     1
+(1 row)
+
+SELECT COUNT(*) FROM select_all_view a JOIN view_test_table b ON a.c=b.c;
+ count
+---------------------------------------------------------------------
+     2
+(1 row)
+

src/test/regress/sql/views_create.sql

@@ -21,3 +21,19 @@ SELECT * FROM select_filtered_view;
 
 -- dummy temp recursive view
 CREATE TEMP RECURSIVE VIEW recursive_defined_non_recursive_view(c) AS (SELECT 1);
+
+CREATE MATERIALIZED VIEW select_all_matview AS
+    SELECT * FROM view_test_table
+    WITH DATA;
+
+CREATE MATERIALIZED VIEW IF NOT EXISTS select_filtered_matview AS
+    SELECT * FROM view_test_table WHERE c = 'views'
+    WITH NO DATA;
+
+REFRESH MATERIALIZED VIEW select_filtered_matview;
+
+SELECT COUNT(*) FROM select_all_matview;
+SELECT * FROM select_filtered_matview;
+
+SELECT COUNT(*) FROM select_all_view a JOIN select_filtered_matview b ON a.c=b.c;
+SELECT COUNT(*) FROM select_all_view a JOIN view_test_table b ON a.c=b.c;