Incorrect partition name is not resulting error in Tidb.

[ramanich1]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

drop table if exists t1;
create table t1 (a int) partition by list(a) (partition `s1 s2 ` values in (0), partition `s1 s2` values in (2));
USE information_schema;
SELECT table_name,partition_name  FROM partitions WHERE table_schema='test' AND table_name='t1' and partition_name ='s1 s2';
use test;

2. What did you expect to see? (Required)

mysql> create table t1 (a int) partition by list(a) (partition `s1 s2 ` values in (0), partition `s1 s2` values in (2));
ERROR 1567 (HY000): Incorrect partition name

mysql> SELECT table_name,partition_name  FROM partitions WHERE table_schema='test' AND table_name='t1' and partition_name ='s1 s2';
Empty set (0.00 sec)

3. What did you see instead (Required)

mysql> create table t1 (a int) partition by list(a) (partition `s1 s2 ` values in (0), partition `s1 s2` values in (2));
Query OK, 0 rows affected (0.01 sec)

mysql> SELECT table_name,partition_name  FROM partitions WHERE table_schema='test' AND table_name='t1' and partition_name ='s1 s2';
+------------+----------------+
| table_name | partition_name |
+------------+----------------+
| t1         | s1 s2          |
| t1         | s1 s2          |
+------------+----------------+
2 rows in set (0.00 sec)

4. What is your TiDB version? (Required)

| Release Version: v5.4.0-alpha-264-g6efa36df6
Edition: Community
Git Commit Hash: 6efa36df6cff325106f67ecfe3d79816ba37ca6a
Git Branch: master
UTC Build Time: 2021-12-28 02:03:55
GoVersion: go1.17.2
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false |

[ramanich1]

Please note that :

create table t1 (a int) partition by list (a) (partition `s1 s2 ` values in (0)); 
 --- `s1 s2 ` is treated as incorrect partition name in mysql . Tidb it's valid.
create table t1 (a int) partition by list (a)(partition `s1 s2` values in (0)); 
-- `s1 s2`Valid in both mysql and Tidb.

[mjonss]

/assign

[mjonss]

/component tablepartition

[mjonss]

/label affects-5.3

[mjonss]

This affects all versions since v3.0.20 including v3.1.2, v4.0.16, v5.0.6, v5.1.3, v5.2.3, v5.3.0 and v5.4.0.

But I don't consider it to be a major bug, but rather moderate or even minor.