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=10265850.63..10265853.38 rows=100 width=39) (actual time=100191.589..100191.910 rows=100 loops=1)
   Buffers: shared hit=1305379 read=1142594 dirtied=942 written=1111
   ->  GroupAggregate  (cost=10265850.63..11100543.88 rows=30352482 width=39) (actual time=100191.585..100191.895 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1305379 read=1142594 dirtied=942 written=1111
         ->  Sort  (cost=10265850.63..10341731.83 rows=30352482 width=39) (actual time=100191.562..100191.610 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=1305379 read=1142594 dirtied=942 written=1111
               ->  Hash Join  (cost=2916222.71..5663797.20 rows=30352482 width=39) (actual time=76166.616..100189.960 rows=791 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1305367 read=1142594 dirtied=942 written=1111
                     ->  Seq Scan on lineitem  (cost=0.00..1685237.63 rows=60704963 width=8) (actual time=0.067..13215.720 rows=60044994 loops=1)
                           Buffers: shared hit=629964 read=448224 dirtied=942 written=926
                     ->  Hash  (cost=2821348.16..2821348.16 rows=7589964 width=39) (actual time=76060.710..76060.710 rows=113 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=675403 read=694370 written=185
                           ->  Hash Join  (cost=2201428.31..2821348.16 rows=7589964 width=39) (actual time=65396.154..76059.899 rows=113 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=675403 read=694370 written=185
                                 ->  Hash Join  (cost=2132400.31..2638470.70 rows=7589964 width=20) (actual time=63784.302..74441.334 rows=113 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=675401 read=659094 written=164
                                       ->  Seq Scan on orders  (cost=0.00..408106.27 rows=15179927 width=16) (actual time=0.013..4642.804 rows=15015000 loops=1)
                                             Buffers: shared hit=108688 read=147619 written=158
                                       ->  Hash  (cost=2081101.07..2081101.07 rows=4103939 width=4) (actual time=63614.775..63614.775 rows=113 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=566713 read=511475 written=6
                                             ->  HashAggregate  (cost=1988762.44..2040061.68 rows=4103939 width=8) (actual time=53624.188..63611.181 rows=113 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014887
                                                   Buffers: shared hit=566713 read=511475 written=6
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1685237.63 rows=60704963 width=8) (actual time=0.010..15562.359 rows=60044994 loops=1)
                                                         Buffers: shared hit=566713 read=511475 written=6
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1599.139..1599.139 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=21
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.025..1028.700 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=21
 Planning time: 7.662 ms
 Execution time: 100444.390 ms
(42 rows)

COMMIT;
COMMIT