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) > 314
	)
	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=10242586.37..10242589.12 rows=100 width=39) (actual time=87420.052..87420.313 rows=85 loops=1)
   Buffers: shared hit=1312858 read=1130325 dirtied=721 written=775
   ->  GroupAggregate  (cost=10242586.37..11075618.35 rows=30292072 width=39) (actual time=87420.050..87420.304 rows=85 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1312858 read=1130325 dirtied=721 written=775
         ->  Sort  (cost=10242586.37..10318316.55 rows=30292072 width=39) (actual time=87420.031..87420.079 rows=595 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 71kB
               Buffers: shared hit=1312858 read=1130325 dirtied=721 written=775
               ->  Hash Join  (cost=2908017.85..5650127.83 rows=30292072 width=39) (actual time=67489.467..87418.663 rows=595 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1312846 read=1130325 dirtied=721 written=775
                     ->  Seq Scan on lineitem  (cost=0.00..1681887.44 rows=60584144 width=8) (actual time=0.047..10956.391 rows=60044176 loops=1)
                           Buffers: shared hit=507114 read=568932 dirtied=721 written=715
                     ->  Hash  (cost=2813330.60..2813330.60 rows=7574980 width=39) (actual time=67335.825..67335.825 rows=85 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=805732 read=561393 written=60
                           ->  Hash Join  (cost=2195202.56..2813330.60 rows=7574980 width=39) (actual time=58396.365..67330.300 rows=85 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=805732 read=561393 written=60
                                 ->  Hash Join  (cost=2126174.56..2630677.90 rows=7574980 width=20) (actual time=57004.723..65931.366 rows=85 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=770454 read=561393 written=60
                                       ->  Seq Scan on orders  (cost=0.00..407300.59 rows=15149959 width=16) (actual time=0.010..3630.944 rows=15015000 loops=1)
                                             Buffers: shared hit=215683 read=40118 written=56
                                       ->  Hash  (cost=2075686.56..2075686.56 rows=4039040 width=4) (actual time=56845.582..56845.582 rows=85 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=554771 read=521275 written=4
                                             ->  HashAggregate  (cost=1984808.16..2035296.16 rows=4039040 width=8) (actual time=45461.947..56844.121 rows=85 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014915
                                                   Buffers: shared hit=554771 read=521275 written=4
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1681887.44 rows=60584144 width=8) (actual time=0.010..12355.813 rows=60044176 loops=1)
                                                         Buffers: shared hit=554771 read=521275 written=4
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=960.470..960.470 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.016..500.798 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 3.777 ms
 Execution time: 87686.770 ms
(42 rows)

COMMIT;
COMMIT