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=10243159.14..10243161.89 rows=100 width=39) (actual time=70809.750..70810.006 rows=75 loops=1)
   Buffers: shared hit=1384565 read=1058614 written=228
   ->  GroupAggregate  (cost=10243159.14..11076196.40 rows=30292264 width=39) (actual time=70809.747..70809.997 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1384565 read=1058614 written=228
         ->  Sort  (cost=10243159.14..10318889.80 rows=30292264 width=39) (actual time=70809.738..70809.776 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=1384565 read=1058614 written=228
               ->  Hash Join  (cost=2908549.82..5650668.36 rows=30292264 width=39) (actual time=51781.731..70809.038 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1384553 read=1058614 written=228
                     ->  Seq Scan on lineitem  (cost=0.00..1681889.28 rows=60584528 width=8) (actual time=0.048..9299.986 rows=60044176 loops=1)
                           Buffers: shared hit=441281 read=634763 written=2
                     ->  Hash  (cost=2813862.57..2813862.57 rows=7574980 width=39) (actual time=51672.484..51672.484 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=943272 read=423851 written=226
                           ->  Hash Join  (cost=2195617.15..2813862.57 rows=7574980 width=39) (actual time=45661.406..51672.332 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=943272 read=423851 written=226
                                 ->  Hash Join  (cost=2126589.15..2631209.87 rows=7574980 width=20) (actual time=44752.839..50763.553 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=907994 read=423851 written=226
                                       ->  Seq Scan on orders  (cost=0.00..407300.59 rows=15149959 width=16) (actual time=0.006..2768.863 rows=15015000 loops=1)
                                             Buffers: shared hit=191437 read=64364 written=226
                                       ->  Hash  (cost=2075954.43..2075954.43 rows=4050778 width=4) (actual time=44664.117..44664.117 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=716557 read=359487
                                             ->  HashAggregate  (cost=1984811.92..2035446.65 rows=4050778 width=8) (actual time=38730.169..44663.965 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=716557 read=359487
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1681889.28 rows=60584528 width=8) (actual time=0.004..8802.000 rows=60044176 loops=1)
                                                         Buffers: shared hit=716557 read=359487
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=898.282..898.282 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=0.013..441.120 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 4.020 ms
 Execution time: 70932.647 ms
(42 rows)

COMMIT;
COMMIT