All tables, columns, steps, injectables and broadcasts registered with
    Orca. Includes local columns on tables.

def schema():
    """
    All tables, columns, steps, injectables and broadcasts registered with
    Orca. Includes local columns on tables.

    """
    tables = orca.list_tables()
    cols = {t: orca.get_table(t).columns for t in tables}
    steps = orca.list_steps()
    injectables = orca.list_injectables()
    broadcasts = orca.list_broadcasts()

    return jsonify(
        tables=tables, columns=cols, steps=steps, injectables=injectables,
        broadcasts=broadcasts)