SHOW CREATE TABLE with clustered primary key does not show AUTO_INCREMENT value when setting AUTO_ID_CACHE=1

[pcqz]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

mysql> create table clustered_table(a int auto_increment primary key) auto_id_cache=1;
Query OK, 0 rows affected (0.12 sec)

mysql> insert into clustered_table values(null);
Query OK, 1 row affected (0.01 sec)

mysql> show create table clustered_table;
+-----------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table           | Create Table                                                                                                                                                                                                                      |
+-----------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| clustered_table | CREATE TABLE `clustered_table` (
  `a` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![auto_id_cache] AUTO_ID_CACHE=1 */ |
+-----------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> show table clustered_table next_row_id;
+---------+-----------------+-------------+--------------------+----------------+
| DB_NAME | TABLE_NAME      | COLUMN_NAME | NEXT_GLOBAL_ROW_ID | ID_TYPE        |
+---------+-----------------+-------------+--------------------+----------------+
| test    | clustered_table | a           |                  1 | _TIDB_ROWID    |
| test    | clustered_table | a           |                  3 | AUTO_INCREMENT |
+---------+-----------------+-------------+--------------------+----------------+
2 rows in set (0.00 sec)

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

I expect to see AUTO_INCREMENT value in the SHOW CREATE TABLE output.

3. What did you see instead (Required)

There is no AUTO_INCREMENT value.

4. What is your TiDB version? (Required)

master

[tiancaiamao]

Fixed by #44743