Add test case for recursive CTE

Maksim Milyutin · Maksim Milyutin · commit 0e54eef94137 · 2016-11-17T15:10:55.000+03:00
diff --git a/expected/pathman_basic.out b/expected/pathman_basic.out
@@ -2001,7 +2001,35 @@ EXPLAIN (COSTS OFF) SELECT * FROM test.index_on_childs WHERE c1 > 100 AND c1 < 2
          Filter: (c1 < 2500)
 (12 rows)
 
+/* Test recursive CTE */
+create table test.recursive_cte_test_tbl(id int not null, name text not null);
+select * from create_hash_partitions('test.recursive_cte_test_tbl', 'id', 2);
+ create_hash_partitions 
+------------------------
+                      2
+(1 row)
+
+insert into test.recursive_cte_test_tbl (id, name) select id, 'name'||id from generate_series(1,100) f(id);
+insert into test.recursive_cte_test_tbl (id, name) select id, 'name'||(id + 1) from generate_series(1,100) f(id);
+insert into test.recursive_cte_test_tbl (id, name) select id, 'name'||(id + 2) from generate_series(1,100) f(id);
+select * from test.recursive_cte_test_tbl where id = 5;
+ id | name  
+----+-------
+  5 | name5
+  5 | name6
+  5 | name7
+(3 rows)
+
+with recursive test as (select min(name) as name from test.recursive_cte_test_tbl where id = 5 union all select (select min(name) from test.recursive_cte_test_tbl where id = 5 and name > test.name) from test where name is not null) select * from test;
+ name  
+-------
+ name5
+ name6
+ name7
+ 
+(4 rows)
+
 DROP SCHEMA test CASCADE;
-NOTICE:  drop cascades to 48 other objects
+NOTICE:  drop cascades to 51 other objects
 DROP EXTENSION pg_pathman CASCADE;
 DROP SCHEMA pathman CASCADE;
diff --git a/sql/pathman_basic.sql b/sql/pathman_basic.sql
@@ -517,6 +517,15 @@ SELECT set_enable_parent('test.index_on_childs', true);
 VACUUM ANALYZE test.index_on_childs;
 EXPLAIN (COSTS OFF) SELECT * FROM test.index_on_childs WHERE c1 > 100 AND c1 < 2500 AND c2 = 500;
 
+/* Test recursive CTE */
+create table test.recursive_cte_test_tbl(id int not null, name text not null);
+select * from create_hash_partitions('test.recursive_cte_test_tbl', 'id', 2);
+insert into test.recursive_cte_test_tbl (id, name) select id, 'name'||id from generate_series(1,100) f(id);
+insert into test.recursive_cte_test_tbl (id, name) select id, 'name'||(id + 1) from generate_series(1,100) f(id);
+insert into test.recursive_cte_test_tbl (id, name) select id, 'name'||(id + 2) from generate_series(1,100) f(id);
+select * from test.recursive_cte_test_tbl where id = 5;
+with recursive test as (select min(name) as name from test.recursive_cte_test_tbl where id = 5 union all select (select min(name) from test.recursive_cte_test_tbl where id = 5 and name > test.name) from test where name is not null) select * from test;
+
 DROP SCHEMA test CASCADE;
 DROP EXTENSION pg_pathman CASCADE;
 DROP SCHEMA pathman CASCADE;
