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) > 312
	)
	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=10408050.65..10408053.40 rows=100 width=39) (actual time=114381.453..114382.085 rows=100 loops=1)
   Buffers: shared hit=1097282 read=1344158 dirtied=95 written=100
   ->  GroupAggregate  (cost=10408050.65..11240502.65 rows=30270982 width=39) (actual time=114381.450..114382.072 rows=100 loops=1)
         Buffers: shared hit=1097282 read=1344158 dirtied=95 written=100
         ->  Sort  (cost=10408050.65..10483728.10 rows=30270982 width=39) (actual time=114381.420..114381.548 rows=701 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 86kB
               Buffers: shared hit=1097282 read=1344158 dirtied=95 written=100
               ->  Hash Join  (cost=3078734.81..5818938.87 rows=30270982 width=39) (actual time=82928.123..114375.796 rows=784 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1097268 read=1344158 dirtied=95 written=100
                     ->  Seq Scan on lineitem  (cost=0.00..1680719.65 rows=60541965 width=8) (actual time=0.058..18399.740 rows=59983922 loops=1)
                           Buffers: shared hit=681431 read=393869 written=4
                     ->  Hash  (cost=2984141.21..2984141.21 rows=7567488 width=39) (actual time=82267.592..82267.592 rows=112 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=415837 read=950289 dirtied=95 written=96
                           ->  Hash Join  (cost=2195762.28..2984141.21 rows=7567488 width=39) (actual time=71870.106..82266.995 rows=112 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=415837 read=950289 dirtied=95 written=96
                                 ->  Hash Join  (cost=2126734.28..2763763.45 rows=7567488 width=20) (actual time=70388.380..80783.022 rows=112 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=380562 read=950286 dirtied=95 written=96
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.012..5266.200 rows=15000000 loops=1)
                                             Buffers: shared hit=212994 read=42554
                                       ->  Hash  (cost=2075553.99..2075553.99 rows=4094423 width=4) (actual time=70230.383..70230.383 rows=112 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=167568 read=907732 dirtied=95 written=96
                                             ->  HashAggregate  (cost=1983429.48..2034609.76 rows=4094423 width=8) (actual time=61748.131..70229.479 rows=112 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999888
                                                   Buffers: shared hit=167568 read=907732 dirtied=95 written=96
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680719.65 rows=60541965 width=8) (actual time=0.007..17810.796 rows=59983922 loops=1)
                                                         Buffers: shared hit=167568 read=907732 dirtied=95 written=96
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1480.187..1480.187 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35275 read=3
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.012..765.850 rows=1500000 loops=1)
                                             Buffers: shared hit=35275 read=3
 Total runtime: 114595.496 ms
(39 rows)

COMMIT;
COMMIT