'Create policy_stat table which is specific to the account DB.
Not a part of Pluggable Back-ends, internal to the baseline code.
:param conn: DB connection object'

def create_policy_stat_table(self, conn):

    conn.executescript('\n                                                CREATE    TABLE    policy_stat    (\n                                                                storage_policy_index    INTEGER    PRIMARY    KEY,\n                                                                container_count    INTEGER    DEFAULT    0,\n                                                                object_count    INTEGER    DEFAULT    0,\n                                                                bytes_used    INTEGER    DEFAULT    0\n                                                );\n                                                INSERT    OR    IGNORE    INTO    policy_stat    (\n                                                                storage_policy_index,    container_count,    object_count,\n                                                                bytes_used\n                                                )\n                                                SELECT    0,    container_count,    object_count,    bytes_used\n                                                FROM    account_stat\n                                                WHERE    container_count    >    0;\n                                ')
