ALTER SCHEMA changes the definition of a schema.
You must own the schema to use ALTER SCHEMA. To rename a schema you must also have the CREATE privilege for the database. To alter the owner, you must also be a direct or indirect member of the new owning role, and you must have the CREATE privilege for the database:
ALTER SCHEMA name RENAME TO new_name ALTER SCHEMA name OWNER TO new_owner
The name of an existing schema.
The new name of the schema.
The new owner of the schema.