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 '1995-03-24'
	and l_shipdate > date '1995-03-24'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2780314.49..2780314.51 rows=10 width=20) (actual time=108656.662..108656.669 rows=10 loops=1)
   Buffers: shared hit=1015759 read=360445 dirtied=31 written=22
   ->  Sort  (cost=2780314.49..2788283.06 rows=3187429 width=20) (actual time=108656.657..108656.661 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=1015759 read=360445 dirtied=31 written=22
         ->  HashAggregate  (cost=2679561.00..2711435.29 rows=3187429 width=20) (actual time=108563.065..108635.757 rows=114029 loops=1)
               Buffers: shared hit=1015753 read=360445 dirtied=31 written=22
               ->  Hash Join  (cost=633649.15..2631749.57 rows=3187429 width=20) (actual time=40882.221..108017.334 rows=301704 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1015753 read=360445 dirtied=31 written=22
                     ->  Seq Scan on lineitem  (cost=0.00..1844247.69 rows=32527584 width=12) (actual time=0.039..41843.498 rows=32139912 loops=1)
                           Filter: (l_shipdate > '1995-03-24'::date)
                           Rows Removed by Filter: 27904704
                           Buffers: shared hit=757149 read=325297
                     ->  Hash  (cost=614981.85..614981.85 rows=1493384 width=12) (actual time=40880.277..40880.277 rows=1474438 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 63355kB
                           Buffers: shared hit=258604 read=35148 dirtied=31 written=22
                           ->  Hash Join  (cost=49758.64..614981.85 rows=1493384 width=12) (actual time=1898.674..39579.771 rows=1474438 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=258604 read=35148 dirtied=31 written=22
                                 ->  Seq Scan on orders  (cost=0.00..447819.04 rows=7452388 width=16) (actual time=0.020..16276.281 rows=7353220 loops=1)
                                       Filter: (o_orderdate < '1995-03-24'::date)
                                       Rows Removed by Filter: 7661780
                                       Buffers: shared hit=225374 read=31946 dirtied=31 written=22
                                 ->  Hash  (cost=46001.33..46001.33 rows=300585 width=4) (actual time=1898.430..1898.430 rows=300276 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10557kB
                                       Buffers: shared hit=33230 read=3202
                                       ->  Bitmap Heap Scan on customer  (cost=6966.01..46001.33 rows=300585 width=4) (actual time=222.574..1725.759 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Buffers: shared hit=33230 read=3202
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6890.87 rows=300585 width=0) (actual time=206.695..206.695 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1155
 Total runtime: 108701.047 ms
(35 rows)

COMMIT;
COMMIT