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=10384127.58..10384130.33 rows=100 width=39) (actual time=213299.575..213300.184 rows=100 loops=1)
   Buffers: shared hit=1559353 read=876692 written=10
   ->  GroupAggregate  (cost=10384127.58..11214685.28 rows=30202098 width=39) (actual time=213299.571..213300.152 rows=100 loops=1)
         Buffers: shared hit=1559353 read=876692 written=10
         ->  Sort  (cost=10384127.58..10459632.83 rows=30202098 width=39) (actual time=213299.544..213299.640 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=1559353 read=876692 written=10
               ->  Hash Join  (cost=3071986.57..5805957.96 rows=30202098 width=39) (actual time=133712.341..213294.921 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1559339 read=876692 written=10
                     ->  Seq Scan on lineitem  (cost=0.00..1676897.96 rows=60404196 width=8) (actual time=0.057..65211.895 rows=60045310 loops=1)
                           Buffers: shared hit=383478 read=689378
                     ->  Hash  (cost=2977580.65..2977580.65 rows=7552474 width=39) (actual time=131683.293..131683.293 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=1175861 read=187314 written=10
                           ->  Hash Join  (cost=2190810.64..2977580.65 rows=7552474 width=39) (actual time=114249.153..131682.514 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1175861 read=187314 written=10
                                 ->  Hash Join  (cost=2121782.64..2757503.17 rows=7552474 width=20) (actual time=111442.551..128873.620 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1140704 read=187193 written=10
                                       ->  Seq Scan on orders  (cost=0.00..406090.48 rows=15104948 width=16) (actual time=0.015..11567.980 rows=15015000 loops=1)
                                             Buffers: shared hit=244221 read=10820 written=3
                                       ->  Hash  (cost=2070759.89..2070759.89 rows=4081820 width=4) (actual time=111049.224..111049.224 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=896483 read=176373 written=7
                                             ->  HashAggregate  (cost=1978918.94..2029941.69 rows=4081820 width=8) (actual time=101619.584..111048.144 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=896483 read=176373 written=7
                                                   ->  Seq Scan on lineitem  (cost=0.00..1676897.96 rows=60404196 width=8) (actual time=0.850..51215.164 rows=60045310 loops=1)
                                                         Buffers: shared hit=896483 read=176373 written=7
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2804.310..2804.310 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35157 read=121
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.029..1942.372 rows=1500000 loops=1)
                                             Buffers: shared hit=35157 read=121
 Total runtime: 213451.185 ms
(39 rows)

COMMIT;
COMMIT