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 '1995-03-14'
	and l_shipdate > date '1995-03-14'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2670647.60..2670647.63 rows=10 width=20) (actual time=33157.401..33157.405 rows=10 loops=1)
   Buffers: shared hit=878546 read=479206 dirtied=253
   ->  Sort  (cost=2670647.60..2678526.36 rows=3151502 width=20) (actual time=33157.398..33157.400 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=878546 read=479206 dirtied=253
         ->  HashAggregate  (cost=2571029.75..2602544.77 rows=3151502 width=20) (actual time=33041.304..33135.367 rows=113449 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=878540 read=479206 dirtied=253
               ->  Hash Join  (cost=551468.16..2523757.22 rows=3151502 width=20) (actual time=8623.093..32434.156 rows=298836 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=878540 read=479206 dirtied=253
                     ->  Seq Scan on lineitem  (cost=0.00..1818865.65 rows=32508904 width=12) (actual time=0.033..17889.745 rows=32391112 loops=1)
                           Filter: (l_shipdate > '1995-03-14'::date)
                           Rows Removed by Filter: 27654491
                           Buffers: shared hit=710739 read=356807
                     ->  Hash  (cost=533255.09..533255.09 rows=1457046 width=12) (actual time=8612.150..8612.150 rows=1458608 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 79059kB
                           Buffers: shared hit=167801 read=122399 dirtied=253
                           ->  Hash Join  (cost=49740.43..533255.09 rows=1457046 width=12) (actual time=803.931..8073.857 rows=1458608 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=167801 read=122399 dirtied=253
                                 ->  Seq Scan on orders  (cost=0.00..441649.60 rows=7278559 width=16) (actual time=0.023..4869.034 rows=7290563 loops=1)
                                       Filter: (o_orderdate < '1995-03-14'::date)
                                       Rows Removed by Filter: 7724437
                                       Buffers: shared hit=167799 read=85976 dirtied=253
                                 ->  Hash  (cost=45987.00..45987.00 rows=300275 width=4) (actual time=801.155..801.155 rows=299496 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14626kB
                                       Buffers: shared hit=2 read=36423
                                       ->  Bitmap Heap Scan on customer  (cost=6955.56..45987.00 rows=300275 width=4) (actual time=72.635..708.559 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Heap Blocks: exact=35275
                                             Buffers: shared hit=2 read=36423
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6880.49 rows=300275 width=0) (actual time=63.890..63.890 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1150
 Planning time: 4.017 ms
 Execution time: 33873.976 ms
(38 rows)

COMMIT;
COMMIT