exchange partition incorrectly report `Found a row that does not match the partition`

[djshow832]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

CREATE TABLE di_tidb_wzp_test (a1 int(11) not null,a2 int(11) not null,a3 date default null, primary key (`a1`,`a2`)) partition by range columns(`a1`,`a2`)(partition `p10` values less than (10,10),partition `p20` values less than (20,20),partition `pmax` values less than (maxvalue,maxvalue));
insert into di_tidb_wzp_test values(5,10,null);
insert into di_tidb_wzp_test values(10,4,null);
CREATE TABLE di_tidb_wzp_test_np (a1 int(11) not null,a2 int(11) not null,a3 date default null, primary key (`a1`,`a2`));
insert into di_tidb_wzp_test_np values(10,4,null);
insert into di_tidb_wzp_test_np values(4,10,null);
alter table di_tidb_wzp_test exchange partition p10 with table di_tidb_wzp_test_np;

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

alter table succeeds.

3. What did you see instead (Required)

mysql> alter table di_tidb_wzp_test exchange partition p10 with table di_tidb_wzp_test_np;
ERROR 1737 (HY000): Found a row that does not match the partition

4. What is your TiDB version? (Required)

v8.5.0

[djshow832]

Another one:

CREATE TABLE di_tidb_wzp_test (a1 int(11) not null,a2 int(11) not null,a3 date default null, primary key (`a1`,`a2`)) partition by range columns(`a1`,`a2`)(partition `p10` values less than (10,10),partition `p20` values less than (20,20),partition `pmax` values less than (maxvalue,maxvalue));
insert into di_tidb_wzp_test values(5,10,null);
insert into di_tidb_wzp_test values(10,1,null);
CREATE TABLE di_tidb_wzp_test_np (a1 int(11) not null,a2 int(11) not null,a3 date default null, primary key (`a1`,`a2`));
insert into di_tidb_wzp_test_np values(10,1,null);
alter table di_tidb_wzp_test exchange partition p20 with table di_tidb_wzp_test_np;

It succeeds but the result is wrong:

mysql> select * from di_tidb_wzp_test;
+----+----+------+
| a1 | a2 | a3   |
+----+----+------+
| 10 |  1 | NULL |
|  5 | 10 | NULL |
| 10 |  1 | NULL |
+----+----+------+
3 rows in set (0.01 sec)

mysql> select * from di_tidb_wzp_test partition(p10);
+----+----+------+
| a1 | a2 | a3   |
+----+----+------+
|  5 | 10 | NULL |
| 10 |  1 | NULL |
+----+----+------+
2 rows in set (0.01 sec)

mysql> select * from di_tidb_wzp_test partition(p20);
+----+----+------+
| a1 | a2 | a3   |
+----+----+------+
| 10 |  1 | NULL |
+----+----+------+
1 row in set (0.01 sec)

[djshow832]

checkExchangePartitionRecordValidation only checks the first column: SELECT 1 FROM `test`.`di_tidb_wzp_test_np` WHERE `a1` >= '10' LIMIT 1.