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
ALTERIGNORETABLETableNameRenameIndexSpec,
RenameIndexSpec
RENAMEKEYINDEXIdentifierTOIdentifier

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(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)
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(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,请尝试 TiDB 支持资源

另请参阅