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) > 315
	)
	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=10182043.94..10182046.69 rows=100 width=39) (actual time=99266.556..99266.792 rows=75 loops=1)
   Buffers: shared hit=1272263 read=1156640 dirtied=784 written=5525
   ->  GroupAggregate  (cost=10182043.94..11010136.78 rows=30112467 width=39) (actual time=99266.553..99266.775 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1272263 read=1156640 dirtied=784 written=5525
         ->  Sort  (cost=10182043.94..10257325.11 rows=30112467 width=39) (actual time=99266.537..99266.566 rows=525 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 66kB
               Buffers: shared hit=1272263 read=1156640 dirtied=784 written=5525
               ->  Hash Join  (cost=2892254.05..5618105.73 rows=30112467 width=39) (actual time=79156.916..99265.430 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1272251 read=1156640 dirtied=784 written=5525
                     ->  Seq Scan on lineitem  (cost=0.00..1671915.34 rows=60224934 width=8) (actual time=0.035..11160.952 rows=60045303 loops=1)
                           Buffers: shared hit=577510 read=492156
                     ->  Hash  (cost=2798129.45..2798129.45 rows=7529968 width=39) (actual time=78967.847..78967.847 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=694741 read=664484 dirtied=784 written=5525
                           ->  Hash Join  (cost=2183434.41..2798129.45 rows=7529968 width=39) (actual time=69714.946..78967.252 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=694741 read=664484 dirtied=784 written=5525
                                 ->  Hash Join  (cost=2114406.41..2616151.93 rows=7529968 width=20) (actual time=66944.061..76189.628 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=660488 read=663459 dirtied=784 written=5525
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.010..3721.542 rows=15015000 loops=1)
                                             Buffers: shared hit=152830 read=101451 dirtied=118 written=4908
                                       ->  Hash  (cost=2063918.41..2063918.41 rows=4039040 width=4) (actual time=66721.306..66721.306 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=507658 read=562008 dirtied=666 written=617
                                             ->  HashAggregate  (cost=1973040.01..2023528.01 rows=4039040 width=8) (actual time=56744.961..66718.308 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=507658 read=562008 dirtied=666 written=617
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671915.34 rows=60224934 width=8) (actual time=0.030..13780.374 rows=60045303 loops=1)
                                                         Buffers: shared hit=507658 read=562008 dirtied=666 written=617
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1144.120..1144.120 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=34253 read=1025
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.030..573.225 rows=1500000 loops=1)
                                             Buffers: shared hit=34253 read=1025
 Planning time: 4.324 ms
 Execution time: 99610.645 ms
(42 rows)

COMMIT;
COMMIT