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
AlterTableStmt ::=
'ALTER' IgnoreOptional 'TABLE' TableName ( AlterTableSpecListOpt AlterTablePartitionOpt | 'ANALYZE' 'PARTITION' PartitionNameList ( 'INDEX' IndexNameList )? AnalyzeOptionListOpt )
KeyOrIndex ::=
'KEY'
| 'INDEX'
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，请在 GitHub 上提交 issue。