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=10245533.92..10245536.67 rows=100 width=39) (actual time=104473.036..104473.299 rows=75 loops=1)
   Buffers: shared hit=1492762 read=950421 written=173
   ->  GroupAggregate  (cost=10245533.92..11078568.90 rows=30292181 width=39) (actual time=104473.032..104473.290 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1492762 read=950421 written=173
         ->  Sort  (cost=10245533.92..10321264.37 rows=30292181 width=39) (actual time=104473.016..104473.044 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=1492762 read=950421 written=173
               ->  Hash Join  (cost=2910941.57..5653057.55 rows=30292181 width=39) (actual time=80212.589..104471.788 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1492750 read=950421 written=173
                     ->  Seq Scan on lineitem  (cost=0.00..1681889.62 rows=60584362 width=8) (actual time=0.064..13374.102 rows=59984384 loops=1)
                           Buffers: shared hit=572084 read=503962
                     ->  Hash  (cost=2816254.32..2816254.32 rows=7574980 width=39) (actual time=80035.746..80035.746 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=920666 read=446459 written=173
                           ->  Hash Join  (cost=2197477.29..2816254.32 rows=7574980 width=39) (actual time=69877.967..80035.247 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=920666 read=446459 written=173
                                 ->  Hash Join  (cost=2128449.29..2633601.62 rows=7574980 width=20) (actual time=68386.578..78538.442 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=920663 read=411184 written=110
                                       ->  Seq Scan on orders  (cost=0.00..407300.59 rows=15149959 width=16) (actual time=0.013..4128.684 rows=15000000 loops=1)
                                             Buffers: shared hit=210899 read=44902 written=104
                                       ->  Hash  (cost=2077150.06..2077150.06 rows=4103939 width=4) (actual time=68239.198..68239.198 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=709764 read=366282 written=6
                                             ->  HashAggregate  (cost=1984811.43..2036110.67 rows=4103939 width=8) (actual time=55836.920..68236.090 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999925
                                                   Buffers: shared hit=709764 read=366282 written=6
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1681889.62 rows=60584362 width=8) (actual time=0.023..15858.164 rows=59984384 loops=1)
                                                         Buffers: shared hit=709764 read=366282 written=6
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1477.880..1477.880 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=3 read=35275 written=63
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.024..927.360 rows=1500000 loops=1)
                                             Buffers: shared hit=3 read=35275 written=63
 Planning time: 7.210 ms
 Execution time: 104796.902 ms
(42 rows)

COMMIT;
COMMIT