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=10441886.44..10441889.19 rows=100 width=39) (actual time=170768.099..170768.571 rows=76 loops=1)
   Buffers: shared hit=1524137 read=926239 written=103
   ->  GroupAggregate  (cost=10441886.44..11277409.92 rows=30382672 width=39) (actual time=170768.095..170768.556 rows=76 loops=1)
         Buffers: shared hit=1524137 read=926239 written=103
         ->  Sort  (cost=10441886.44..10517843.12 rows=30382672 width=39) (actual time=170768.070..170768.146 rows=532 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=1524137 read=926239 written=103
               ->  Hash Join  (cost=3084728.28..5835037.23 rows=30382672 width=39) (actual time=110196.017..170764.198 rows=532 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1524123 read=926239 written=103
                     ->  Seq Scan on lineitem  (cost=0.00..1686915.43 rows=60765343 width=8) (actual time=0.038..44582.307 rows=60045297 loops=1)
                           Buffers: shared hit=416537 read=662725
                     ->  Hash  (cost=2989760.08..2989760.08 rows=7597456 width=39) (actual time=109866.695..109866.695 rows=76 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=1107586 read=263514 written=103
                           ->  Hash Join  (cost=2199455.39..2989760.08 rows=7597456 width=39) (actual time=96901.042..109863.412 rows=76 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1107586 read=263514 written=103
                                 ->  Hash Join  (cost=2130427.39..2768782.96 rows=7597456 width=20) (actual time=94972.663..107932.506 rows=76 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1074250 read=261572 written=103
                                       ->  Seq Scan on orders  (cost=0.00..408509.11 rows=15194911 width=16) (actual time=0.029..6871.646 rows=15015000 loops=1)
                                             Buffers: shared hit=254224 read=2336 written=103
                                       ->  Hash  (cost=2080539.80..2080539.80 rows=3991007 width=4) (actual time=94888.897..94888.897 rows=76 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=820026 read=259236
                                             ->  HashAggregate  (cost=1990742.15..2040629.73 rows=3991007 width=8) (actual time=85952.245..94888.240 rows=76 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014924
                                                   Buffers: shared hit=820026 read=259236
                                                   ->  Seq Scan on lineitem  (cost=0.00..1686915.43 rows=60765343 width=8) (actual time=0.032..32275.642 rows=60045297 loops=1)
                                                         Buffers: shared hit=820026 read=259236
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1926.407..1926.407 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=33336 read=1942
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.014..1184.908 rows=1500000 loops=1)
                                             Buffers: shared hit=33336 read=1942
 Total runtime: 171001.388 ms
(39 rows)

COMMIT;
COMMIT