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=10217775.63..10217778.38 rows=100 width=39) (actual time=103619.859..103620.169 rows=100 loops=1)
   Buffers: shared hit=1608836 read=828079 dirtied=1355 written=416
   ->  GroupAggregate  (cost=10217775.63..11048682.76 rows=30214805 width=39) (actual time=103619.856..103620.154 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1608836 read=828079 dirtied=1355 written=416
         ->  Sort  (cost=10217775.63..10293312.64 rows=30214805 width=39) (actual time=103619.838..103619.882 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: 85kB
               Buffers: shared hit=1608836 read=828079 dirtied=1355 written=416
               ->  Hash Join  (cost=2902479.32..5637585.60 rows=30214805 width=39) (actual time=79102.829..103618.170 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1608824 read=828079 dirtied=1355 written=416
                     ->  Seq Scan on lineitem  (cost=0.00..1677588.10 rows=60429610 width=8) (actual time=0.038..12746.311 rows=59984909 loops=1)
                           Buffers: shared hit=762172 read=311120 dirtied=1037 written=1
                     ->  Hash  (cost=2808073.40..2808073.40 rows=7552474 width=39) (actual time=78770.977..78770.977 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=846652 read=516959 dirtied=318 written=415
                           ->  Hash Join  (cost=2191321.56..2808073.40 rows=7552474 width=39) (actual time=68892.541..78766.472 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=846652 read=516959 dirtied=318 written=415
                                 ->  Hash Join  (cost=2122293.56..2625758.29 rows=7552474 width=20) (actual time=67865.574..77733.773 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=811415 read=516918 dirtied=318 written=410
                                       ->  Seq Scan on orders  (cost=0.00..406090.48 rows=15104948 width=16) (actual time=0.011..4072.665 rows=15000000 loops=1)
                                             Buffers: shared hit=130555 read=124486 written=162
                                       ->  Hash  (cost=2071380.20..2071380.20 rows=4073069 width=4) (actual time=67682.333..67682.333 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=680860 read=392432 dirtied=318 written=248
                                             ->  HashAggregate  (cost=1979736.15..2030649.51 rows=4073069 width=8) (actual time=54910.615..67679.962 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999889
                                                   Buffers: shared hit=680860 read=392432 dirtied=318 written=248
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1677588.10 rows=60429610 width=8) (actual time=0.017..14127.091 rows=59984909 loops=1)
                                                         Buffers: shared hit=680860 read=392432 dirtied=318 written=248
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1015.871..1015.871 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35237 read=41 written=5
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..549.528 rows=1500000 loops=1)
                                             Buffers: shared hit=35237 read=41 written=5
 Planning time: 4.770 ms
 Execution time: 103994.059 ms
(42 rows)

COMMIT;
COMMIT