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 = 'HOUSEHOLD'
	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=2678891.09..2678891.12 rows=10 width=20) (actual time=31068.109..31068.112 rows=10 loops=1)
   Buffers: shared hit=332023 read=1029684
   ->  Sort  (cost=2678891.09..2686823.46 rows=3172947 width=20) (actual time=31068.105..31068.106 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=332023 read=1029684
         ->  HashAggregate  (cost=2578595.38..2610324.85 rows=3172947 width=20) (actual time=30999.721..31049.136 rows=113007 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=332017 read=1029684
               ->  Hash Join  (cost=553730.46..2531001.18 rows=3172947 width=20) (actual time=7619.745..30772.936 rows=298305 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=332017 read=1029684
                     ->  Seq Scan on lineitem  (cost=0.00..1824307.23 rows=32329071 width=12) (actual time=0.083..15872.711 rows=32158407 loops=1)
                           Filter: (l_shipdate > '1995-03-22'::date)
                           Rows Removed by Filter: 27827901
                           Buffers: shared hit=42207 read=1028533
                     ->  Hash  (cost=535236.30..535236.30 rows=1479533 width=12) (actual time=7608.108..7608.108 rows=1462907 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 79244kB
                           Buffers: shared hit=289810 read=1151
                           ->  Hash Join  (cost=49726.44..535236.30 rows=1479533 width=12) (actual time=378.997..7044.177 rows=1462907 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=289810 read=1151
                                 ->  Seq Scan on orders  (cost=0.00..442970.50 rows=7398407 width=16) (actual time=0.012..3923.295 rows=7333519 loops=1)
                                       Filter: (o_orderdate < '1995-03-22'::date)
                                       Rows Removed by Filter: 7666481
                                       Buffers: shared hit=254534
                                 ->  Hash  (cost=45976.82..45976.82 rows=299970 width=4) (actual time=376.227..376.227 rows=299751 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14635kB
                                       Buffers: shared hit=35276 read=1151
                                       ->  Bitmap Heap Scan on customer  (cost=6949.19..45976.82 rows=299970 width=4) (actual time=59.261..293.851 rows=299751 loops=1)
                                             Recheck Cond: (c_mktsegment = 'HOUSEHOLD'::bpchar)
                                             Heap Blocks: exact=35275
                                             Buffers: shared hit=35276 read=1151
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6874.20 rows=299970 width=0) (actual time=51.792..51.792 rows=299751 loops=1)
                                                   Index Cond: (c_mktsegment = 'HOUSEHOLD'::bpchar)
                                                   Buffers: shared hit=1 read=1151
 Planning time: 2.987 ms
 Execution time: 31086.968 ms
(38 rows)

COMMIT;
COMMIT