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=10456704.98..10456707.73 rows=100 width=39) (actual time=121084.357..121084.979 rows=100 loops=1)
   Buffers: shared hit=1128080 read=1324663 dirtied=87 written=4609
   ->  GroupAggregate  (cost=10456704.98..11293042.48 rows=30412273 width=39) (actual time=121084.352..121084.954 rows=100 loops=1)
         Buffers: shared hit=1128080 read=1324663 dirtied=87 written=4609
         ->  Sort  (cost=10456704.98..10532735.66 rows=30412273 width=39) (actual time=121084.319..121084.442 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=1128080 read=1324663 dirtied=87 written=4609
               ->  Hash Join  (cost=3092160.67..5845154.71 rows=30412273 width=39) (actual time=87016.905..121078.890 rows=791 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1128066 read=1324663 dirtied=87 written=4609
                     ->  Seq Scan on lineitem  (cost=0.00..1688564.46 rows=60824546 width=8) (actual time=0.029..19673.663 rows=60045033 loops=1)
                           Buffers: shared hit=502830 read=577489 written=12
                     ->  Hash  (cost=2997098.82..2997098.82 rows=7604948 width=39) (actual time=86940.405..86940.405 rows=113 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=625236 read=747174 dirtied=87 written=4597
                           ->  Hash Join  (cost=2205020.00..2997098.82 rows=7604948 width=39) (actual time=76259.391..86939.776 rows=113 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=625236 read=747174 dirtied=87 written=4597
                                 ->  Hash Join  (cost=2135992.00..2775971.86 rows=7604948 width=20) (actual time=74618.009..85295.304 rows=113 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=589958 read=747174 dirtied=87 written=4597
                                       ->  Seq Scan on orders  (cost=0.00..408911.95 rows=15209895 width=16) (actual time=0.011..5689.487 rows=15015000 loops=1)
                                             Buffers: shared hit=184089 read=72724 dirtied=87 written=4597
                                       ->  Hash  (cost=2084811.71..2084811.71 rows=4094423 width=4) (actual time=74482.817..74482.817 rows=113 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=405869 read=674450
                                             ->  HashAggregate  (cost=1992687.19..2043867.48 rows=4094423 width=8) (actual time=65823.475..74481.961 rows=113 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014887
                                                   Buffers: shared hit=405869 read=674450
                                                   ->  Seq Scan on lineitem  (cost=0.00..1688564.46 rows=60824546 width=8) (actual time=0.025..20385.959 rows=60045033 loops=1)
                                                         Buffers: shared hit=405869 read=674450
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1639.363..1639.363 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=0.015..846.227 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 121266.531 ms
(39 rows)

COMMIT;
COMMIT