'Confirm support for STDDEV and related stats functions.
SQLite supports STDDEV as an extension package; so
connection.ops.check_expression_support() can\'t unilaterally
rule out support for STDDEV. Manually check whether the call works.'

@cached_property
def supports_stddev(self):

    with self.connection.cursor() as cursor:
        cursor.execute('CREATE    TABLE    STDDEV_TEST    (X    INT)')
        try:
            cursor.execute('SELECT    STDDEV(*)    FROM    STDDEV_TEST')
            has_support = True
        except utils.DatabaseError:
            has_support = False
        cursor.execute('DROP    TABLE    STDDEV_TEST')
    return has_support
