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
- RenameIndexSpec
AlterTableStmt
::= 'ALTER' 'IGNORE'? 'TABLE' TableName RenameIndexSpec ( ',' RenameIndexSpec )*
RenameIndexSpec
::= 'RENAME' ( 'KEY' | 'INDEX' ) Identifier 'TO' Identifier
示例
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)
SHOW CREATE TABLE t1;
*************************** 1. row ***************************
Table: t1
Create Table: CREATE TABLE `t1` (
`id` int NOT NULL AUTO_INCREMENT,
`c1` int NOT NULL,
PRIMARY KEY (`id`),
KEY `col1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
1 row in set (0.00 sec)
ALTER TABLE t1 RENAME INDEX col1 TO c1;
Query OK, 0 rows affected (0.09 sec)
SHOW CREATE TABLE t1;
*************************** 1. row ***************************
Table: t1
Create Table: CREATE TABLE `t1` (
`id` int NOT NULL AUTO_INCREMENT,
`c1` int 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，请尝试 TiDB 支持资源。