def seperate_mash(updates, column_names):
    """
    returns a dict with updates for all columns
        and a dict with updates for mash
    """
    column_updates = {}
    for column in column_names:
        if column in updates:
            column_updates[column] = updates[column]
            del updates[column]
    mash_updates = dict(updates)
    return column_updates, mash_updates
