BUG#18659: In get_part_iter_for_interval_via_walking(), when we need to

obtain partition number, call partition_info->get_part_partition_id() when
the table has subpartitions, and get_partition_id() otherwise. (The bug
was that we were always doing the latter)


mysql-test/r/partition_pruning.result:
  Testcase for BUG#18659
mysql-test/t/partition_pruning.test:
  Testcase for BUG#18659

1 files changed, 14 insertions, 0 deletions

diff --git a/mysql-test/r/partition_pruning.result b/mysql-test/r/partition_pruning.result
index 16dc23cdf42..d520f7735ec 100644
--- a/mysql-test/r/partition_pruning.result
+++ b/mysql-test/r/partition_pruning.result
@@ -583,3 +583,17 @@ explain partitions select * from t1 where a>='a' and a <= 'dddd';
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	p1,p2,p3,p4,p5	ALL	NULL	NULL	NULL	NULL	5	Using where
 drop table t1;
+create table t1 (f_int1 integer) partition by list(abs(mod(f_int1,2)))
+subpartition by hash(f_int1) subpartitions 2
+(
+partition part1 values in (0),
+partition part2 values in (1),
+partition part4 values in (null)
+);
+insert into t1 set f_int1 = null;
+select * from t1 where f_int1 is null;
+f_int1
+NULL
+explain partitions select * from t1 where f_int1 is null;
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	part4_p2sp0	system	NULL	NULL	NULL	NULL	1