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) > 314
	)
	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=10452091.77..10452094.52 rows=100 width=39) (actual time=175536.057..175536.565 rows=86 loops=1)
   Buffers: shared hit=1746151 read=706592 written=3
   ->  GroupAggregate  (cost=10452091.77..11288433.54 rows=30412428 width=39) (actual time=175536.053..175536.552 rows=86 loops=1)
         Buffers: shared hit=1746151 read=706592 written=3
         ->  Sort  (cost=10452091.77..10528122.84 rows=30412428 width=39) (actual time=175536.019..175536.111 rows=602 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 72kB
               Buffers: shared hit=1746151 read=706592 written=3
               ->  Hash Join  (cost=3087511.59..5840514.12 rows=30412428 width=39) (actual time=121521.748..175531.446 rows=602 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1746137 read=706592 written=3
                     ->  Seq Scan on lineitem  (cost=0.00..1688567.55 rows=60824855 width=8) (actual time=0.030..38482.104 rows=60045033 loops=1)
                           Buffers: shared hit=777306 read=303013
                     ->  Hash  (cost=2992449.74..2992449.74 rows=7604948 width=39) (actual time=121392.896..121392.896 rows=86 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 7kB
                           Buffers: shared hit=968831 read=403579 written=3
                           ->  Hash Join  (cost=2201405.07..2992449.74 rows=7604948 width=39) (actual time=106775.541..121392.237 rows=86 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=968831 read=403579 written=3
                                 ->  Hash Join  (cost=2132377.07..2771322.78 rows=7604948 width=20) (actual time=103558.970..118173.258 rows=86 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=968829 read=368303 written=3
                                       ->  Seq Scan on orders  (cost=0.00..408911.95 rows=15209895 width=16) (actual time=0.012..7865.017 rows=15015000 loops=1)
                                             Buffers: shared hit=256810 read=3
                                       ->  Hash  (cost=2082489.48..2082489.48 rows=3991007 width=4) (actual time=103490.886..103490.886 rows=86 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=712019 read=368300 written=3
                                             ->  HashAggregate  (cost=1992691.82..2042579.41 rows=3991007 width=8) (actual time=94044.234..103489.890 rows=86 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014914
                                                   Buffers: shared hit=712019 read=368300 written=3
                                                   ->  Seq Scan on lineitem  (cost=0.00..1688567.55 rows=60824855 width=8) (actual time=0.011..38718.951 rows=60045033 loops=1)
                                                         Buffers: shared hit=712019 read=368300 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=3214.584..3214.584 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.693..2347.984 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Total runtime: 175801.913 ms
(39 rows)

COMMIT;
COMMIT