BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	l_orderkey,
	sum(l_extendedprice * (1 - l_discount)) as revenue,
	o_orderdate,
	o_shippriority
from
	customer,
	orders,
	lineitem
where
	c_mktsegment = 'FURNITURE'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-26'
	and l_shipdate > date '1995-03-26'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2748786.16..2748786.19 rows=10 width=20) (actual time=75156.506..75156.511 rows=10 loops=1)
   Buffers: shared hit=1059405 read=299663 dirtied=1 written=6
   ->  Sort  (cost=2748786.16..2756739.99 rows=3181531 width=20) (actual time=75156.502..75156.504 rows=10 loops=1)
         Sort Key: (sum((lineitem.l_extendedprice * (1::double precision - lineitem.l_discount)))), orders.o_orderdate
         Sort Method: top-N heapsort  Memory: 25kB
         Buffers: shared hit=1059405 read=299663 dirtied=1 written=6
         ->  HashAggregate  (cost=2648219.11..2680034.42 rows=3181531 width=20) (actual time=75056.127..75135.056 rows=113328 loops=1)
               Buffers: shared hit=1059399 read=299663 dirtied=1 written=6
               ->  Hash Join  (cost=627321.29..2600496.15 rows=3181531 width=20) (actual time=26976.583..74600.755 rows=299218 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1059399 read=299663 dirtied=1 written=6
                     ->  Seq Scan on lineitem  (cost=0.00..1820672.86 rows=32183116 width=12) (actual time=0.028..27439.788 rows=32090603 loops=1)
                           Filter: (l_shipdate > '1995-03-26'::date)
                           Rows Removed by Filter: 27954776
                           Buffers: shared hit=828585 read=240023 dirtied=1 written=1
                     ->  Hash  (cost=608730.03..608730.03 rows=1487301 width=12) (actual time=26974.809..26974.809 rows=1473562 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 63318kB
                           Buffers: shared hit=230814 read=59640 written=5
                           ->  Hash Join  (cost=49763.39..608730.03 rows=1487301 width=12) (actual time=1236.819..26116.228 rows=1473562 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=230814 read=59640 written=5
                                 ->  Seq Scan on orders  (cost=0.00..442089.90 rows=7418453 width=16) (actual time=0.013..7029.708 rows=7365567 loops=1)
                                       Filter: (o_orderdate < '1995-03-26'::date)
                                       Rows Removed by Filter: 7649433
                                       Buffers: shared hit=228796 read=25232 written=5
                                 ->  Hash  (cost=46004.26..46004.26 rows=300730 width=4) (actual time=1236.631..1236.631 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=2018 read=34408
                                       ->  Bitmap Heap Scan on customer  (cost=6967.14..46004.26 rows=300730 width=4) (actual time=127.827..1076.302 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=2018 read=34408
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6891.96 rows=300730 width=0) (actual time=113.565..113.565 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151
 Total runtime: 75187.699 ms
(35 rows)

COMMIT;
COMMIT