def METHOD_NAME(op, left, right, predicates, **kwargs):
    """Execute a cross join in pandas.
    Notes
    -----
    We create a dummy column of all :data:`True` instances and use that as the
    join key. This results in the desired Cartesian product behavior guaranteed
    by cross join.
    """
    assert not predicates, "cross join predicates must be empty"
    return pd.merge(
        left,
        right,
        how="cross",
        copy=False,
        suffixes=constants.JOIN_SUFFIXES,
    )