BEGIN;
BEGIN
EXPLAIN
select
	l_shipmode,
	sum(case
		when o_orderpriority = '1-URGENT'
			or o_orderpriority = '2-HIGH'
			then 1
		else 0
	end) as high_line_count,
	sum(case
		when o_orderpriority <> '1-URGENT'
			and o_orderpriority <> '2-HIGH'
			then 1
		else 0
	end) as low_line_count
from
	orders,
	lineitem
where
	o_orderkey = l_orderkey
	and l_shipmode in ('REG AIR', 'TRUCK')
	and l_commitdate < l_receiptdate
	and l_shipdate < l_commitdate
	and l_receiptdate >= date '1996-01-01'
	and l_receiptdate < date '1996-01-01' + interval '1 year'
group by
	l_shipmode
order by
	l_shipmode;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=979588.22..979588.22 rows=1 width=27)
   Sort Key: lineitem.l_shipmode
   ->  HashAggregate  (cost=979588.20..979588.21 rows=1 width=27)
         ->  Hash Join  (cost=590769.00..974516.24 rows=289826 width=27)
               Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
               ->  Index Scan using lineitem_l_orderkey_idx_part2 on lineitem  (cost=0.00..374690.18 rows=289826 width=15)
                     Filter: ((l_shipmode = ANY ('{"REG AIR",TRUCK}'::bpchar[])) AND (l_receiptdate >= '1996-01-01'::date) AND (l_receiptdate < '1997-01-01 00:00:00'::timestamp without time zone))
               ->  Hash  (cost=403269.00..403269.00 rows=15000000 width=20)
                     ->  Seq Scan on orders  (cost=0.00..403269.00 rows=15000000 width=20)
(9 rows)

COMMIT;
COMMIT