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=10349324.09..10349326.84 rows=100 width=39) (actual time=183533.450..183534.003 rows=100 loops=1)
   Buffers: shared hit=1247151 read=1181754 written=20
   ->  GroupAggregate  (cost=10349324.09..11177418.69 rows=30112531 width=39) (actual time=183533.448..183533.991 rows=100 loops=1)
         Buffers: shared hit=1247151 read=1181754 written=20
         ->  Sort  (cost=10349324.09..10424605.42 rows=30112531 width=39) (actual time=183533.428..183533.518 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: 85kB
               Buffers: shared hit=1247151 read=1181754 written=20
               ->  Hash Join  (cost=3059518.77..5785373.97 rows=30112531 width=39) (actual time=134509.676..183528.906 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1247137 read=1181754 written=20
                     ->  Seq Scan on lineitem  (cost=0.00..1671916.62 rows=60225062 width=8) (actual time=0.036..33469.788 rows=60045303 loops=1)
                           Buffers: shared hit=329839 read=739827
                     ->  Hash  (cost=2965394.17..2965394.17 rows=7529968 width=39) (actual time=133348.473..133348.473 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=917298 read=441927 written=20
                           ->  Hash Join  (cost=2181755.18..2965394.17 rows=7529968 width=39) (actual time=118682.651..133347.106 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=917298 read=441927 written=20
                                 ->  Hash Join  (cost=2112727.18..2745766.81 rows=7529968 width=20) (actual time=113684.260..128344.253 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=917296 read=406651 written=20
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.018..8754.024 rows=15015000 loops=1)
                                             Buffers: shared hit=250409 read=3872 written=13
                                       ->  Hash  (cost=2062839.59..2062839.59 rows=3991007 width=4) (actual time=113468.501..113468.501 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=666887 read=402779 written=7
                                             ->  HashAggregate  (cost=1973041.93..2022929.52 rows=3991007 width=8) (actual time=103210.658..113467.470 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=666887 read=402779 written=7
                                                   ->  Seq Scan on lineitem  (cost=0.00..1671916.62 rows=60225062 width=8) (actual time=0.015..45381.374 rows=60045303 loops=1)
                                                         Buffers: shared hit=666887 read=402779 written=7
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=4995.755..4995.755 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=0.025..3153.495 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Total runtime: 183840.905 ms
(39 rows)

COMMIT;
COMMIT