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 ('FOB', '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=3035167.79..3035167.79 rows=1 width=27) (actual time=34664.416..34664.416 rows=2 loops=1)
   Sort Key: lineitem.l_shipmode
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=681546 read=643733 dirtied=253 written=1128
   ->  HashAggregate  (cost=3035167.77..3035167.78 rows=1 width=27) (actual time=34664.365..34664.365 rows=2 loops=1)
         Group Key: lineitem.l_shipmode
         Buffers: shared hit=681541 read=643733 dirtied=253 written=1128
         ->  Hash Join  (cost=593719.70..3030040.83 rows=292968 width=27) (actual time=10305.531..34340.330 rows=312460 loops=1)
               Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
               Buffers: shared hit=681541 read=643733 dirtied=253 written=1128
               ->  Seq Scan on lineitem  (cost=0.00..2427165.88 rows=292968 width=15) (actual time=0.054..23668.796 rows=312460 loops=1)
                     Filter: ((l_shipmode = ANY ('{FOB,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: 59733761
                     Buffers: shared hit=484889 read=585848
               ->  Hash  (cost=405283.20..405283.20 rows=15074920 width=20) (actual time=10227.890..10227.890 rows=15015000 loops=1)
                     Buckets: 16777216  Batches: 1  Memory Usage: 893553kB
                     Buffers: shared hit=196649 read=57885 dirtied=253 written=1128
                     ->  Seq Scan on orders  (cost=0.00..405283.20 rows=15074920 width=20) (actual time=0.013..4554.538 rows=15015000 loops=1)
                           Buffers: shared hit=196649 read=57885 dirtied=253 written=1128
 Planning time: 2.137 ms
 Execution time: 34677.909 ms
(21 rows)

COMMIT;
COMMIT