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 '1995-03-05'
	and l_shipdate > date '1995-03-05'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2757554.63..2757554.66 rows=10 width=20) (actual time=82857.297..82857.300 rows=10 loops=1)
   Buffers: shared hit=974518 read=391127
   ->  Sort  (cost=2757554.63..2765420.92 rows=3146515 width=20) (actual time=82857.292..82857.293 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=974518 read=391127
         ->  HashAggregate  (cost=2658094.42..2689559.57 rows=3146515 width=20) (actual time=82728.843..82823.429 rows=113455 loops=1)
               Buffers: shared hit=974512 read=391127
               ->  Hash Join  (cost=626663.05..2610896.70 rows=3146515 width=20) (actual time=29154.516..82244.847 rows=298892 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=974512 read=391127
                     ->  Seq Scan on lineitem  (cost=0.00..1829731.52 rows=32809858 width=12) (actual time=0.049..30145.374 rows=32581598 loops=1)
                           Filter: (l_shipdate > '1995-03-05'::date)
                           Rows Removed by Filter: 27402921
                           Buffers: shared hit=720784 read=353134
                     ->  Hash  (cost=608537.68..608537.68 rows=1450030 width=12) (actual time=29151.496..29151.496 rows=1446038 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62135kB
                           Buffers: shared hit=253728 read=37993
                           ->  Hash Join  (cost=49674.31..608537.68 rows=1450030 width=12) (actual time=2431.028..28113.602 rows=1446038 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=253728 read=37993
                                 ->  Seq Scan on orders  (cost=0.00..444294.89 rows=7277686 width=16) (actual time=0.028..7110.829 rows=7227375 loops=1)
                                       Filter: (o_orderdate < '1995-03-05'::date)
                                       Rows Removed by Filter: 7772625
                                       Buffers: shared hit=253726 read=1569
                                 ->  Hash  (cost=45938.50..45938.50 rows=298865 width=4) (actual time=2430.668..2430.668 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=2 read=36424
                                       ->  Bitmap Heap Scan on customer  (cost=6924.68..45938.50 rows=298865 width=4) (actual time=112.307..1138.068 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=2 read=36424
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6849.97 rows=298865 width=0) (actual time=100.596..100.596 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151
 Total runtime: 82907.086 ms
(35 rows)

COMMIT;
COMMIT