ALTER INDEX

Syntax

ALTER INDEX index_name
    alter_option;

alter_option depends on the operation you want to perform on the index. For all supported clauses, see the sections below.

ALTER INDEX index_name
    RENAME TO new_name;

Parameter or clause	Description
RENAME TO	This clause changes the name of the index. If the index is associated with a table constraint (either UNIQUE, PRIMARY KEY, or EXCLUDE), the constraint is renamed as well. There is no effect on the stored data.
new_name	The new name of the index.

-- Change the name of the index "idx_1" to "idx_2"
ALTER INDEX idx_1 RENAME TO idx_2.