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 '1995-03-29'
	and l_shipdate > date '1995-03-29'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2771755.48..2771755.51 rows=10 width=20) (actual time=100515.926..100515.930 rows=10 loops=1)
   Buffers: shared hit=883200 read=487727 dirtied=1 written=3
   ->  Sort  (cost=2771755.48..2779746.15 rows=3196269 width=20) (actual time=100515.922..100515.925 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=883200 read=487727 dirtied=1 written=3
         ->  HashAggregate  (cost=2670722.57..2702685.26 rows=3196269 width=20) (actual time=100413.823..100491.013 rows=113335 loops=1)
               Buffers: shared hit=883194 read=487727 dirtied=1 written=3
               ->  Hash Join  (cost=632156.86..2622778.53 rows=3196269 width=20) (actual time=30349.161..99824.722 rows=299439 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=883194 read=487727 dirtied=1 written=3
                     ->  Seq Scan on lineitem  (cost=0.00..1836998.93 rows=32442683 width=12) (actual time=0.059..43933.362 rows=32014884 loops=1)
                           Filter: (l_shipdate > '1995-03-29'::date)
                           Rows Removed by Filter: 28030110
                           Buffers: shared hit=591622 read=486566 dirtied=1 written=3
                     ->  Hash  (cost=613462.68..613462.68 rows=1495534 width=12) (actual time=30346.265..30346.265 rows=1477384 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 63482kB
                           Buffers: shared hit=291572 read=1161
                           ->  Hash Join  (cost=49746.29..613462.68 rows=1495534 width=12) (actual time=937.470..29160.758 rows=1477384 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=291572 read=1161
                                 ->  Seq Scan on orders  (cost=0.00..446056.09 rows=7469452 width=16) (actual time=0.023..8860.674 rows=7384200 loops=1)
                                       Filter: (o_orderdate < '1995-03-29'::date)
                                       Rows Removed by Filter: 7630800
                                       Buffers: shared hit=256297 read=10
                                 ->  Hash  (cost=45992.16..45992.16 rows=300330 width=4) (actual time=937.149..937.149 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=35275 read=1151
                                       ->  Bitmap Heap Scan on customer  (cost=6960.04..45992.16 rows=300330 width=4) (actual time=113.104..789.030 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=35275 read=1151
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6884.96 rows=300330 width=0) (actual time=100.493..100.493 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151
 Total runtime: 100579.128 ms
(35 rows)

COMMIT;
COMMIT