BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	c_name,
	c_custkey,
	o_orderkey,
	o_orderdate,
	o_totalprice,
	sum(l_quantity)
from
	customer,
	orders,
	lineitem
where
	o_orderkey in (
		select
			l_orderkey
		from
			lineitem
		group by
			l_orderkey having
				sum(l_quantity) > 315
	)
	and c_custkey = o_custkey
	and o_orderkey = l_orderkey
group by
	c_name,
	c_custkey,
	o_orderkey,
	o_orderdate,
	o_totalprice
order by
	o_totalprice desc,
	o_orderdate
LIMIT 100;
                                                                                        QUERY PLAN                                                                                         
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=10192226.92..10192229.67 rows=100 width=39) (actual time=94225.632..94225.865 rows=75 loops=1)
   Buffers: shared hit=1362392 read=1068912 written=72
   ->  GroupAggregate  (cost=10192226.92..11021151.22 rows=30142702 width=39) (actual time=94225.629..94225.854 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1362392 read=1068912 written=72
         ->  Sort  (cost=10192226.92..10267583.67 rows=30142702 width=39) (actual time=94225.592..94225.625 rows=525 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 66kB
               Buffers: shared hit=1362392 read=1068912 written=72
               ->  Hash Join  (cost=2894900.15..5623488.73 rows=30142702 width=39) (actual time=71396.432..94224.408 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1362380 read=1068912 written=72
                     ->  Seq Scan on lineitem  (cost=0.00..1673594.03 rows=60285403 width=8) (actual time=0.033..12059.966 rows=60046221 loops=1)
                           Buffers: shared hit=517727 read=553013 written=14
                     ->  Hash  (cost=2800681.90..2800681.90 rows=7537460 width=39) (actual time=71085.533..71085.533 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=844653 read=515899 written=58
                           ->  Hash Join  (cost=2185415.45..2800681.90 rows=7537460 width=39) (actual time=61739.032..71081.452 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=844653 read=515899 written=58
                                 ->  Hash Join  (cost=2116387.45..2618592.00 rows=7537460 width=20) (actual time=60749.100..70085.181 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=809410 read=515864 written=56
                                       ->  Seq Scan on orders  (cost=0.00..405283.20 rows=15074920 width=16) (actual time=0.008..3553.994 rows=15015000 loops=1)
                                             Buffers: shared hit=194975 read=59559 written=55
                                       ->  Hash  (cost=2065899.45..2065899.45 rows=4039040 width=4) (actual time=60579.094..60579.094 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=614435 read=456305 written=1
                                             ->  HashAggregate  (cost=1975021.05..2025509.05 rows=4039040 width=8) (actual time=49834.222..60576.456 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=614435 read=456305 written=1
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1673594.03 rows=60285403 width=8) (actual time=0.009..13054.507 rows=60046221 loops=1)
                                                         Buffers: shared hit=614435 read=456305 written=1
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=972.962..972.962 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35243 read=35 written=2
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..482.962 rows=1500000 loops=1)
                                             Buffers: shared hit=35243 read=35 written=2
 Planning time: 4.136 ms
 Execution time: 94708.005 ms
(42 rows)

COMMIT;
COMMIT