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) > 313
	)
	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=10456704.98..10456707.73 rows=100 width=39) (actual time=121849.358..121849.658 rows=100 loops=1)
   Buffers: shared hit=1197943 read=1254800 dirtied=2 written=10
   ->  GroupAggregate  (cost=10456704.98..11293042.48 rows=30412273 width=39) (actual time=121849.354..121849.638 rows=100 loops=1)
         Buffers: shared hit=1197943 read=1254800 dirtied=2 written=10
         ->  Sort  (cost=10456704.98..10532735.66 rows=30412273 width=39) (actual time=121849.337..121849.380 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: 80kB
               Buffers: shared hit=1197943 read=1254800 dirtied=2 written=10
               ->  Hash Join  (cost=3092160.67..5845154.71 rows=30412273 width=39) (actual time=93751.909..121846.211 rows=707 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1197929 read=1254800 dirtied=2 written=10
                     ->  Seq Scan on lineitem  (cost=0.00..1688564.46 rows=60824546 width=8) (actual time=0.056..15761.970 rows=60045033 loops=1)
                           Buffers: shared hit=535189 read=545130
                     ->  Hash  (cost=2997098.82..2997098.82 rows=7604948 width=39) (actual time=93706.779..93706.779 rows=101 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=662740 read=709670 dirtied=2 written=10
                           ->  Hash Join  (cost=2205020.00..2997098.82 rows=7604948 width=39) (actual time=82290.395..93706.277 rows=101 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=662740 read=709670 dirtied=2 written=10
                                 ->  Hash Join  (cost=2135992.00..2775971.86 rows=7604948 width=20) (actual time=81088.091..92494.215 rows=101 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=627545 read=709587 dirtied=2 written=10
                                       ->  Seq Scan on orders  (cost=0.00..408911.95 rows=15209895 width=16) (actual time=0.011..5607.639 rows=15015000 loops=1)
                                             Buffers: shared hit=194119 read=62694 written=2
                                       ->  Hash  (cost=2084811.71..2084811.71 rows=4094423 width=4) (actual time=80914.919..80914.919 rows=101 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=433426 read=646893 dirtied=2 written=8
                                             ->  HashAggregate  (cost=1992687.19..2043867.48 rows=4094423 width=8) (actual time=72275.769..80914.085 rows=101 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014899
                                                   Buffers: shared hit=433426 read=646893 dirtied=2 written=8
                                                   ->  Seq Scan on lineitem  (cost=0.00..1688564.46 rows=60824546 width=8) (actual time=0.038..21129.301 rows=60045033 loops=1)
                                                         Buffers: shared hit=433426 read=646893 dirtied=2 written=8
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1199.666..1199.666 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35195 read=83
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..627.599 rows=1500000 loops=1)
                                             Buffers: shared hit=35195 read=83
 Total runtime: 122033.225 ms
(39 rows)

COMMIT;
COMMIT