BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
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 ('SHIP', '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=3059289.98..3059289.98 rows=1 width=27) (actual time=33670.446..33670.446 rows=2 loops=1)
   Sort Key: lineitem.l_shipmode
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=881022 read=454806 dirtied=253 written=69
   ->  HashAggregate  (cost=3059289.96..3059289.97 rows=1 width=27) (actual time=33670.394..33670.395 rows=2 loops=1)
         Group Key: lineitem.l_shipmode
         Buffers: shared hit=881017 read=454806 dirtied=253 written=69
         ->  Hash Join  (cost=598445.50..3054135.63 rows=294533 width=27) (actual time=9802.465..33352.784 rows=312249 loops=1)
               Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
               Buffers: shared hit=881017 read=454806 dirtied=253 written=69
               ->  Seq Scan on lineitem  (cost=0.00..2446485.98 rows=294533 width=15) (actual time=0.097..23245.692 rows=312249 loops=1)
                     Filter: ((l_shipmode = ANY ('{SHIP,TRUCK}'::bpchar[])) AND (l_commitdate < l_receiptdate) AND (l_shipdate < l_commitdate) AND (l_receiptdate >= '1996-01-01'::date) AND (l_receiptdate < '1997-01-01 00:00:00'::timestamp without time zone))
                     Rows Removed by Filter: 59673289
                     Buffers: shared hit=716147 read=363113
               ->  Hash  (cost=408509.11..408509.11 rows=15194911 width=20) (actual time=9733.241..9733.241 rows=15000000 loops=1)
                     Buckets: 16777216  Batches: 1  Memory Usage: 892791kB
                     Buffers: shared hit=164867 read=91693 dirtied=253 written=69
                     ->  Seq Scan on orders  (cost=0.00..408509.11 rows=15194911 width=20) (actual time=0.012..4621.013 rows=15000000 loops=1)
                           Buffers: shared hit=164867 read=91693 dirtied=253 written=69
 Planning time: 2.089 ms
 Execution time: 33674.631 ms
(21 rows)

COMMIT;
COMMIT