RENAME INDEX

语句用于对已有索引进行重命名。这在 TiDB 中是即时操作的，仅需更改元数据。

Query OK, 0 rows affected (0.11 sec)

*************************** 1. row ***************************
       Table: t1
Create Table: CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  KEY `col1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.09 sec)

*************************** 1. row ***************************
       Table: t1
  `id` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`),
  KEY `c1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
1 row in set (0.00 sec)

• CREATE INDEX
• SHOW INDEX