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 = 'BUILDING'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-22'
	and l_shipdate > date '1995-03-22'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2742645.98..2742646.00 rows=10 width=20) (actual time=143918.570..143918.575 rows=10 loops=1)
   Buffers: shared hit=1042447 read=315312 written=21
   ->  Sort  (cost=2742645.98..2750503.49 rows=3143005 width=20) (actual time=143918.567..143918.570 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=1042447 read=315312 written=21
         ->  HashAggregate  (cost=2643296.72..2674726.77 rows=3143005 width=20) (actual time=143806.138..143895.974 rows=114063 loops=1)
               Buffers: shared hit=1042441 read=315312 written=21
               ->  Hash Join  (cost=625377.38..2596151.64 rows=3143005 width=20) (actual time=41824.213..143019.300 rows=301899 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1042441 read=315312 written=21
                     ->  Seq Scan on lineitem  (cost=0.00..1818861.39 rows=32128753 width=12) (actual time=0.040..70703.259 rows=32158497 loops=1)
                           Filter: (l_shipdate > '1995-03-22'::date)
                           Rows Removed by Filter: 27827055
                           Buffers: shared hit=753689 read=313857 written=5
                     ->  Hash  (cost=606998.50..606998.50 rows=1470311 width=12) (actual time=41822.646..41822.646 rows=1470648 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 63192kB
                           Buffers: shared hit=288752 read=1455 written=16
                           ->  Hash Join  (cost=49758.64..606998.50 rows=1470311 width=12) (actual time=1927.794..40741.118 rows=1470648 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=288752 read=1455 written=16
                                 ->  Seq Scan on orders  (cost=0.00..441649.60 rows=7337247 width=16) (actual time=0.015..15897.869 rows=7333453 loops=1)
                                       Filter: (o_orderdate < '1995-03-22'::date)
                                       Rows Removed by Filter: 7666547
                                       Buffers: shared hit=253475 read=300 written=16
                                 ->  Hash  (cost=46001.33..46001.33 rows=300585 width=4) (actual time=1927.497..1927.497 rows=300276 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10557kB
                                       Buffers: shared hit=35277 read=1155
                                       ->  Bitmap Heap Scan on customer  (cost=6966.01..46001.33 rows=300585 width=4) (actual time=211.311..1761.105 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Buffers: shared hit=35277 read=1155
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6890.87 rows=300585 width=0) (actual time=195.400..195.400 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1155
 Total runtime: 143982.440 ms
(35 rows)

COMMIT;
COMMIT