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 '1995-03-26'
	and l_shipdate > date '1995-03-26'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2760731.66..2760731.69 rows=10 width=20) (actual time=140471.961..140471.966 rows=10 loops=1)
   Buffers: shared hit=717631 read=648899 written=5358
   ->  Sort  (cost=2760731.66..2768647.95 rows=3166515 width=20) (actual time=140471.958..140471.959 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=717631 read=648899 written=5358
         ->  HashAggregate  (cost=2660639.26..2692304.41 rows=3166515 width=20) (actual time=140369.006..140448.187 rows=113926 loops=1)
               Buffers: shared hit=717625 read=648899 written=5358
               ->  Hash Join  (cost=629329.09..2613141.54 rows=3166515 width=20) (actual time=39833.180..139563.820 rows=301439 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=717625 read=648899 written=5358
                     ->  Seq Scan on lineitem  (cost=0.00..1831215.49 rows=32248483 width=12) (actual time=0.093..72500.722 rows=32057241 loops=1)
                           Filter: (l_shipdate > '1995-03-26'::date)
                           Rows Removed by Filter: 27927278
                           Buffers: shared hit=469986 read=604811
                     ->  Hash  (cost=610770.98..610770.98 rows=1484649 width=12) (actual time=39830.787..39830.787 rows=1475429 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 63398kB
                           Buffers: shared hit=247639 read=44088 written=5358
                           ->  Hash Join  (cost=49758.64..610770.98 rows=1484649 width=12) (actual time=3619.892..38805.984 rows=1475429 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=247639 read=44088 written=5358
                                 ->  Seq Scan on orders  (cost=0.00..444294.89 rows=7408797 width=16) (actual time=0.018..12939.120 rows=7358457 loops=1)
                                       Filter: (o_orderdate < '1995-03-26'::date)
                                       Rows Removed by Filter: 7641543
                                       Buffers: shared hit=247637 read=7658 written=228
                                 ->  Hash  (cost=46001.33..46001.33 rows=300585 width=4) (actual time=3619.519..3619.519 rows=300276 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10557kB
                                       Buffers: shared hit=2 read=36430 written=5130
                                       ->  Bitmap Heap Scan on customer  (cost=6966.01..46001.33 rows=300585 width=4) (actual time=191.466..3406.864 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Buffers: shared hit=2 read=36430 written=5130
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6890.87 rows=300585 width=0) (actual time=175.964..175.964 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1155 written=93
 Total runtime: 140527.944 ms
(35 rows)

COMMIT;
COMMIT