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 '1995-03-13'
	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=2775795.23..2775795.26 rows=10 width=20) (actual time=155460.542..155460.547 rows=10 loops=1)
   Buffers: shared hit=660324 read=714556 written=5
   ->  Sort  (cost=2775795.23..2783698.89 rows=3161464 width=20) (actual time=155460.537..155460.540 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=660324 read=714556 written=5
         ->  HashAggregate  (cost=2675862.49..2707477.13 rows=3161464 width=20) (actual time=155355.840..155437.175 rows=113487 loops=1)
               Buffers: shared hit=660318 read=714556 written=5
               ->  Hash Join  (cost=631529.11..2628440.53 rows=3161464 width=20) (actual time=41977.727..154584.337 rows=299150 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=660318 read=714556 written=5
                     ->  Seq Scan on lineitem  (cost=0.00..1842434.86 rows=32763179 width=12) (actual time=0.057..83903.279 rows=32415329 loops=1)
                           Filter: (l_shipdate > '1995-03-13'::date)
                           Rows Removed by Filter: 27629464
                           Buffers: shared hit=457396 read=623986
                     ->  Hash  (cost=613165.16..613165.16 rows=1469116 width=12) (actual time=41974.685..41974.685 rows=1457292 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62619kB
                           Buffers: shared hit=202922 read=90570 written=5
                           ->  Hash Join  (cost=49665.89..613165.16 rows=1469116 width=12) (actual time=3461.934..39910.235 rows=1457292 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=202922 read=90570 written=5
                                 ->  Seq Scan on orders  (cost=0.00..447376.99 rows=7376809 width=16) (actual time=0.015..15869.252 rows=7284475 loops=1)
                                       Filter: (o_orderdate < '1995-03-13'::date)
                                       Rows Removed by Filter: 7730525
                                       Buffers: shared hit=202816 read=54250 written=5
                                 ->  Hash  (cost=45931.76..45931.76 rows=298730 width=4) (actual time=3461.668..3461.668 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=106 read=36320
                                       ->  Bitmap Heap Scan on customer  (cost=6919.64..45931.76 rows=298730 width=4) (actual time=214.040..3275.734 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=106 read=36320
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6844.96 rows=298730 width=0) (actual time=191.940..191.940 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151
 Total runtime: 155508.794 ms
(35 rows)

COMMIT;
COMMIT