--
-- MULTI_WORKING_COLUMNS
--
-- Columns that are used in sorting and grouping but that do not appear in the
-- projection order are called working (resjunk) columns. We check in here that
-- these columns are pulled to the master, and are correctly used in sorting and
-- grouping.
SELECT l_quantity FROM lineitem ORDER BY l_shipdate, l_quantity LIMIT 20;
 l_quantity
---------------------------------------------------------------------
      38.00
      13.00
      15.00
      17.00
      30.00
      24.00
      24.00
       5.00
      38.00
      13.00
      26.00
      30.00
      30.00
      35.00
      38.00
      24.00
      37.00
      11.00
      18.00
      17.00
(20 rows)

SELECT l_quantity, count(*) as count FROM lineitem
	GROUP BY l_quantity, l_shipdate ORDER BY l_quantity, count
	LIMIT 20;
 l_quantity | count
---------------------------------------------------------------------
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
       1.00 |     1
(20 rows)

SELECT l_quantity, l_shipdate, count(*) as count FROM lineitem
	GROUP BY l_quantity, l_shipdate ORDER BY l_quantity, count, l_shipdate
	LIMIT 20;
 l_quantity | l_shipdate | count
---------------------------------------------------------------------
       1.00 | 02-07-1992 |     1
       1.00 | 02-23-1992 |     1
       1.00 | 03-17-1992 |     1
       1.00 | 04-22-1992 |     1
       1.00 | 04-23-1992 |     1
       1.00 | 04-30-1992 |     1
       1.00 | 05-13-1992 |     1
       1.00 | 05-15-1992 |     1
       1.00 | 05-27-1992 |     1
       1.00 | 05-29-1992 |     1
       1.00 | 06-09-1992 |     1
       1.00 | 06-23-1992 |     1
       1.00 | 07-15-1992 |     1
       1.00 | 07-18-1992 |     1
       1.00 | 07-23-1992 |     1
       1.00 | 08-03-1992 |     1
       1.00 | 08-11-1992 |     1
       1.00 | 08-29-1992 |     1
       1.00 | 09-08-1992 |     1
       1.00 | 09-11-1992 |     1
(20 rows)