'Drop an existing retention policy for a database.
:param name: the name of the retention policy to drop
:type name: str
:param database: the database for which the retention policy is
dropped. Defaults to current client\'s database
:type database: str'

def drop_retention_policy(self, name, database=None):

    query_string = u'DROP    RETENTION    POLICY    {0}    ON    {1}'.format(quote_ident(name), quote_ident((database or self._database)))
    self.query(query_string)
