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 '1995-03-13'
	and l_shipdate > date '1995-03-13'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2691080.57..2691080.59 rows=10 width=20) (actual time=34201.190..34201.192 rows=10 loops=1)
   Buffers: shared hit=855269 read=511692 written=110
   ->  Sort  (cost=2691080.57..2699084.49 rows=3201571 width=20) (actual time=34201.188..34201.188 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=855269 read=511692 written=110
         ->  HashAggregate  (cost=2589880.06..2621895.77 rows=3201571 width=20) (actual time=34128.703..34179.536 rows=114134 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=855263 read=511692 written=110
               ->  Hash Join  (cost=555329.20..2541856.49 rows=3201571 width=20) (actual time=9311.962..33876.046 rows=302270 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=855263 read=511692 written=110
                     ->  Seq Scan on lineitem  (cost=0.00..1831530.00 rows=32795090 width=12) (actual time=0.034..17942.982 rows=32414187 loops=1)
                           Filter: (l_shipdate > '1995-03-13'::date)
                           Rows Removed by Filter: 27629895
                           Buffers: shared hit=639571 read=435405 written=4
                     ->  Hash  (cost=536860.08..536860.08 rows=1477529 width=12) (actual time=9295.018..9295.018 rows=1460805 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 79153kB
                           Buffers: shared hit=215692 read=76287 written=106
                           ->  Hash Join  (cost=49816.18..536860.08 rows=1477529 width=12) (actual time=842.563..8684.214 rows=1460805 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=215692 read=76287 written=106
                                 ->  Seq Scan on orders  (cost=0.00..444735.19 rows=7342247 width=16) (actual time=0.030..4712.851 rows=7284686 loops=1)
                                       Filter: (o_orderdate < '1995-03-13'::date)
                                       Rows Removed by Filter: 7730314
                                       Buffers: shared hit=215689 read=39859 written=39
                                 ->  Hash  (cost=46042.99..46042.99 rows=301855 width=4) (actual time=838.035..838.035 rows=300276 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14653kB
                                       Buffers: shared hit=3 read=36428 written=67
                                       ->  Bitmap Heap Scan on customer  (cost=6991.80..46042.99 rows=301855 width=4) (actual time=105.477..727.720 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Heap Blocks: exact=35277
                                             Buffers: shared hit=3 read=36428 written=67
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6916.34 rows=301855 width=0) (actual time=93.616..93.616 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1154 written=2
 Planning time: 3.894 ms
 Execution time: 34231.466 ms
(38 rows)

COMMIT;
COMMIT