from .intcolumn import FormatColumn


# TODO: Drop Null column support in future.
# Compatibility with old servers.
class NullColumn(FormatColumn):
    ch_type = "Null"
    format = "B"

    @property
    def size(self):
        return 1

    def after_read_items(self, items, nulls_map=None):
        return (None,) * len(items)