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=10210250.91..10210253.66 rows=100 width=39) (actual time=97261.353..97261.626 rows=84 loops=1)
   Buffers: shared hit=1417302 read=1018741 dirtied=109 written=2523
   ->  GroupAggregate  (cost=10210250.91..11040819.08 rows=30202479 width=39) (actual time=97261.349..97261.613 rows=84 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1417302 read=1018741 dirtied=109 written=2523
         ->  Sort  (cost=10210250.91..10285757.11 rows=30202479 width=39) (actual time=97261.337..97261.377 rows=588 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 70kB
               Buffers: shared hit=1417302 read=1018741 dirtied=109 written=2523
               ->  Hash Join  (cost=2898028.36..5632020.71 rows=30202479 width=39) (actual time=74524.451..97260.262 rows=588 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1417290 read=1018741 dirtied=109 written=2523
                     ->  Seq Scan on lineitem  (cost=0.00..1676905.58 rows=60404958 width=8) (actual time=0.032..12377.191 rows=60045310 loops=1)
                           Buffers: shared hit=651306 read=421550 written=5
                     ->  Hash  (cost=2803622.44..2803622.44 rows=7552474 width=39) (actual time=74164.173..74164.173 rows=84 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=765984 read=597191 dirtied=109 written=2518
                           ->  Hash Join  (cost=2187680.65..2803622.44 rows=7552474 width=39) (actual time=67001.125..74163.650 rows=84 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=765984 read=597191 dirtied=109 written=2518
                                 ->  Hash Join  (cost=2118652.65..2621307.33 rows=7552474 width=20) (actual time=65783.815..72941.144 rows=84 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=730873 read=597024 dirtied=109 written=2518
                                       ->  Seq Scan on orders  (cost=0.00..406090.48 rows=15104948 width=16) (actual time=0.011..4043.486 rows=15015000 loops=1)
                                             Buffers: shared hit=143372 read=111669 dirtied=109 written=2518
                                       ->  Hash  (cost=2068751.83..2068751.83 rows=3992065 width=4) (actual time=65623.531..65623.531 rows=84 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=587501 read=485355
                                             ->  HashAggregate  (cost=1978930.37..2028831.18 rows=3992065 width=8) (actual time=53521.621..65621.319 rows=84 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014916
                                                   Buffers: shared hit=587501 read=485355
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1676905.58 rows=60404958 width=8) (actual time=0.031..13844.284 rows=60045310 loops=1)
                                                         Buffers: shared hit=587501 read=485355
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1200.673..1200.673 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35111 read=167
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.019..574.249 rows=1500000 loops=1)
                                             Buffers: shared hit=35111 read=167
 Planning time: 4.496 ms
 Execution time: 97501.623 ms
(42 rows)

COMMIT;
COMMIT