RENAME INDEX
ALTER TABLE .. 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。
语法图
AlterTableStmt:
KeyOrIndex:
示例
mysql> CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, c1 INT NOT NULL, INDEX col1 (c1));
Query OK, 0 rows affected (0.11 sec)
mysql> SHOW CREATE TABLE t1\G
*************************** 1. row ***************************
Table: t1
Create Table: CREATE TABLE `t1` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`c1` int(11) NOT NULL,
PRIMARY KEY (`id`),
KEY `col1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
1 row in set (0.00 sec)
mysql> ALTER TABLE t1 RENAME INDEX col1 TO c1;
Query OK, 0 rows affected (0.09 sec)
mysql> SHOW CREATE TABLE t1\G
*************************** 1. row ***************************
Table: t1
Create Table: CREATE TABLE `t1` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`c1` int(11) NOT NULL,
PRIMARY KEY (`id`),
KEY `c1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
1 row in set (0.00 sec)
MySQL 兼容性
RENAME INDEX
语句与 MySQL 完全兼容。如发现任何兼容性差异,请在 GitHub 上提交 issue。