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The RENAME INDEX statement changes the name of an index for a table.
Note:
It is not possible to rename an index referenced by a view. For more details, see View Dependencies.Synopsis
Required privileges
The user must have the CREATE privilege on the table.
Parameters
| Parameter | Description |
|---|---|
IF EXISTS |
Rename the index only if an index current_name exists; if one does not exist, do not return an error. |
table_name |
The name of the table with the index you want to use |
index_name |
The current name of the index |
name |
The name you want to use for the index, which must be unique to its table and follow these identifier rules. |
Example
Rename an Index
> SHOW INDEXES FROM users;
+------------+------------+------------+--------------+-------------+-----------+---------+----------+
| table_name | index_name | non_unique | seq_in_index | column_name | direction | storing | implicit |
+------------+------------+------------+--------------+-------------+-----------+---------+----------+
| users | primary | false | 1 | id | ASC | false | false |
| users | name_idx | true | 1 | name | ASC | false | false |
| users | name_idx | true | 2 | id | ASC | false | true |
+------------+------------+------------+--------------+-------------+-----------+---------+----------+
(3 rows)
> ALTER INDEX users@name_idx RENAME TO users_name_idx;
> SHOW INDEXES FROM users;
+------------+----------------+------------+--------------+-------------+-----------+---------+----------+
| table_name | index_name | non_unique | seq_in_index | column_name | direction | storing | implicit |
+------------+----------------+------------+--------------+-------------+-----------+---------+----------+
| users | primary | false | 1 | id | ASC | false | false |
| users | users_name_idx | true | 1 | name | ASC | false | false |
| users | users_name_idx | true | 2 | id | ASC | false | true |
+------------+----------------+------------+--------------+-------------+-----------+---------+----------+
(3 rows)
