Add some more tests for tuple routing.

Commit a2566508 fixed some issues with
how PartitionDispatch related code handled multi-level partitioned
tables, but didn't add any tests.

Discussion: http://postgr.es/m/CA%2BTgmoZ86v1G%2Bzx9etMiSQaBBvYMKfU-iitqZArSh5z0n8Q4cA%40mail.gmail.com

Amit Langote, per a complaint from me.

src/test/regress/expected/insert.out

@@ -285,6 +285,34 @@ select tableoid::regclass, * from list_parted;
  part_ee_ff2 | EE | 10
 (8 rows)
 
+-- some more tests to exercise tuple-routing with multi-level partitioning
+create table part_gg partition of list_parted for values in ('gg') partition by range (b);
+create table part_gg1 partition of part_gg for values from (unbounded) to (1);
+create table part_gg2 partition of part_gg for values from (1) to (10) partition by range (b);
+create table part_gg2_1 partition of part_gg2 for values from (1) to (5);
+create table part_gg2_2 partition of part_gg2 for values from (5) to (10);
+create table part_ee_ff3 partition of part_ee_ff for values from (20) to (30) partition by range (b);
+create table part_ee_ff3_1 partition of part_ee_ff3 for values from (20) to (25);
+create table part_ee_ff3_2 partition of part_ee_ff3 for values from (25) to (30);
+truncate list_parted;
+insert into list_parted values ('aa'), ('cc');
+insert into list_parted select 'Ff', s.a from generate_series(1, 29) s(a);
+insert into list_parted select 'gg', s.a from generate_series(1, 9) s(a);
+insert into list_parted (b) values (1);
+select tableoid::regclass::text, a, min(b) as min_b, max(b) as max_b from list_parted group by 1, 2 order by 1;
+   tableoid    | a  | min_b | max_b 
+---------------+----+-------+-------
+ part_aa_bb    | aa |       |      
+ part_cc_dd    | cc |       |      
+ part_ee_ff1   | Ff |     1 |     9
+ part_ee_ff2   | Ff |    10 |    19
+ part_ee_ff3_1 | Ff |    20 |    24
+ part_ee_ff3_2 | Ff |    25 |    29
+ part_gg2_1    | gg |     1 |     4
+ part_gg2_2    | gg |     5 |     9
+ part_null     |    |     1 |     1
+(9 rows)
+
 -- cleanup
 drop table range_parted cascade;
 NOTICE:  drop cascades to 4 other objects
@@ -293,13 +321,21 @@ drop cascades to table part2
 drop cascades to table part3
 drop cascades to table part4
 drop table list_parted cascade;
-NOTICE:  drop cascades to 6 other objects
+NOTICE:  drop cascades to 14 other objects
 DETAIL:  drop cascades to table part_aa_bb
 drop cascades to table part_cc_dd
 drop cascades to table part_null
 drop cascades to table part_ee_ff
 drop cascades to table part_ee_ff1
 drop cascades to table part_ee_ff2
+drop cascades to table part_ee_ff3
+drop cascades to table part_ee_ff3_1
+drop cascades to table part_ee_ff3_2
+drop cascades to table part_gg
+drop cascades to table part_gg1
+drop cascades to table part_gg2
+drop cascades to table part_gg2_1
+drop cascades to table part_gg2_2
 -- more tests for certain multi-level partitioning scenarios
 create table p (a int, b int) partition by range (a, b);
 create table p1 (b int, a int not null) partition by range (b);

src/test/regress/sql/insert.sql

@@ -167,6 +167,24 @@ insert into list_parted values ('EE', 1);
 insert into part_ee_ff values ('EE', 10);
 select tableoid::regclass, * from list_parted;
 
+-- some more tests to exercise tuple-routing with multi-level partitioning
+create table part_gg partition of list_parted for values in ('gg') partition by range (b);
+create table part_gg1 partition of part_gg for values from (unbounded) to (1);
+create table part_gg2 partition of part_gg for values from (1) to (10) partition by range (b);
+create table part_gg2_1 partition of part_gg2 for values from (1) to (5);
+create table part_gg2_2 partition of part_gg2 for values from (5) to (10);
+
+create table part_ee_ff3 partition of part_ee_ff for values from (20) to (30) partition by range (b);
+create table part_ee_ff3_1 partition of part_ee_ff3 for values from (20) to (25);
+create table part_ee_ff3_2 partition of part_ee_ff3 for values from (25) to (30);
+
+truncate list_parted;
+insert into list_parted values ('aa'), ('cc');
+insert into list_parted select 'Ff', s.a from generate_series(1, 29) s(a);
+insert into list_parted select 'gg', s.a from generate_series(1, 9) s(a);
+insert into list_parted (b) values (1);
+select tableoid::regclass::text, a, min(b) as min_b, max(b) as max_b from list_parted group by 1, 2 order by 1;
+
 -- cleanup
 drop table range_parted cascade;
 drop table list_parted cascade;