RENAME INDEX

The statement ALTER TABLE .. RENAME INDEX renames an existing index to a new name. This operation is instant in TiDB, and requires only a meta data change.

Synopsis

AlterTableStmt
ALTERIGNORETABLETableNameRenameIndexSpec,
RenameIndexSpec
RENAMEKEYINDEXIdentifierTOIdentifier

Examples

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 compatibility

The RENAME INDEX statement in TiDB is fully compatible with MySQL. If you find any compatibility differences, report a bug.

See also