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=10400559.12..10400561.87 rows=100 width=39) (actual time=158038.446..158038.870 rows=75 loops=1)
   Buffers: shared hit=1590169 read=850623 written=20
   ->  GroupAggregate  (cost=10400559.12..11232764.50 rows=30262014 width=39) (actual time=158038.442..158038.852 rows=75 loops=1)
         Buffers: shared hit=1590169 read=850623 written=20
         ->  Sort  (cost=10400559.12..10476214.15 rows=30262014 width=39) (actual time=158038.412..158038.486 rows=525 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=1590169 read=850623 written=20
               ->  Hash Join  (cost=3073488.05..5812874.86 rows=30262014 width=39) (actual time=107566.743..158034.296 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1590155 read=850623 written=20
                     ->  Seq Scan on lineitem  (cost=0.00..1680216.29 rows=60524029 width=8) (actual time=0.038..34481.154 rows=59983922 loops=1)
                           Buffers: shared hit=859589 read=215387
                     ->  Hash  (cost=2978894.45..2978894.45 rows=7567488 width=39) (actual time=107398.824..107398.824 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=730566 read=635236 written=20
                           ->  Hash Join  (cost=2191549.68..2978894.45 rows=7567488 width=39) (actual time=91886.328..107398.294 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=730566 read=635236 written=20
                                 ->  Hash Join  (cost=2122521.68..2758516.69 rows=7567488 width=20) (actual time=90484.006..105992.765 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=695288 read=635236 written=20
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.009..9610.807 rows=15000000 loops=1)
                                             Buffers: shared hit=204718 read=50830 written=17
                                       ->  Hash  (cost=2072634.09..2072634.09 rows=3991007 width=4) (actual time=90259.234..90259.234 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=490570 read=584406 written=3
                                             ->  HashAggregate  (cost=1982836.44..2032724.02 rows=3991007 width=8) (actual time=81387.797..90257.054 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999925
                                                   Buffers: shared hit=490570 read=584406 written=3
                                                   ->  Seq Scan on lineitem  (cost=0.00..1680216.29 rows=60524029 width=8) (actual time=0.011..30742.190 rows=59983922 loops=1)
                                                         Buffers: shared hit=490570 read=584406 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1400.283..1400.283 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..743.784 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 158243.647 ms
(39 rows)

COMMIT;
COMMIT