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=10462345.72..10462348.47 rows=100 width=39) (actual time=127803.616..127803.905 rows=100 loops=1)
   Buffers: shared hit=1730195 read=724927 dirtied=49 written=3181
   ->  GroupAggregate  (cost=10462345.72..11299510.40 rows=30442352 width=39) (actual time=127803.613..127803.895 rows=100 loops=1)
         Buffers: shared hit=1730195 read=724927 dirtied=49 written=3181
         ->  Sort  (cost=10462345.72..10538451.60 rows=30442352 width=39) (actual time=127803.595..127803.630 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=1730195 read=724927 dirtied=49 written=3181
               ->  Hash Join  (cost=3090305.95..5846017.33 rows=30442352 width=39) (actual time=107674.013..127799.769 rows=791 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1730181 read=724927 dirtied=49 written=3181
                     ->  Seq Scan on lineitem  (cost=0.00..1690229.04 rows=60884704 width=8) (actual time=0.091..11182.553 rows=60044793 loops=1)
                           Buffers: shared hit=743854 read=337528 dirtied=1
                     ->  Hash  (cost=2995150.45..2995150.45 rows=7612440 width=39) (actual time=107440.453..107440.453 rows=113 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=986327 read=387399 dirtied=48 written=3181
                           ->  Hash Join  (cost=2203365.81..2995150.45 rows=7612440 width=39) (actual time=98628.600..107439.823 rows=113 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=986327 read=387399 dirtied=48 written=3181
                                 ->  Hash Join  (cost=2134337.81..2773873.65 rows=7612440 width=20) (actual time=96380.756..105189.974 rows=113 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=951049 read=387399 dirtied=48 written=3181
                                       ->  Seq Scan on orders  (cost=0.00..409314.79 rows=15224879 width=16) (actual time=0.019..3841.361 rows=15015000 loops=1)
                                             Buffers: shared hit=168978 read=88088 dirtied=48 written=3181
                                       ->  Hash  (cost=2084450.22..2084450.22 rows=3991007 width=4) (actual time=96258.228..96258.228 rows=113 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=782071 read=299311
                                             ->  HashAggregate  (cost=1994652.56..2044540.15 rows=3991007 width=8) (actual time=88229.185..96257.037 rows=113 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014887
                                                   Buffers: shared hit=782071 read=299311
                                                   ->  Seq Scan on lineitem  (cost=0.00..1690229.04 rows=60884704 width=8) (actual time=0.019..36729.850 rows=60044793 loops=1)
                                                         Buffers: shared hit=782071 read=299311
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2245.439..2245.439 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=0.026..1443.567 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 127983.112 ms
(39 rows)

COMMIT;
COMMIT