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=10184991.27..10184994.02 rows=100 width=39) (actual time=100818.778..100819.109 rows=100 loops=1)
   Buffers: shared hit=1471599 read=957304 written=2
   ->  GroupAggregate  (cost=10184991.27..11013087.08 rows=30112575 width=39) (actual time=100818.775..100819.094 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1471599 read=957304 written=2
         ->  Sort  (cost=10184991.27..10260272.71 rows=30112575 width=39) (actual time=100818.757..100818.797 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=1471599 read=957304 written=2
               ->  Hash Join  (cost=2895177.75..5621035.37 rows=30112575 width=39) (actual time=76856.887..100817.056 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1471587 read=957304 written=2
                     ->  Seq Scan on lineitem  (cost=0.00..1671917.50 rows=60225150 width=8) (actual time=0.049..12834.204 rows=59985781 loops=1)
                           Buffers: shared hit=607126 read=462540
                     ->  Hash  (cost=2801053.15..2801053.15 rows=7529968 width=39) (actual time=76674.580..76674.580 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=864461 read=494764 written=2
                           ->  Hash Join  (cost=2185709.11..2801053.15 rows=7529968 width=39) (actual time=67841.228..76673.828 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=864461 read=494764 written=2
                                 ->  Hash Join  (cost=2116681.11..2619075.62 rows=7529968 width=20) (actual time=66616.207..75441.538 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=829183 read=494764 written=2
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.013..3963.619 rows=15000000 loops=1)
                                             Buffers: shared hit=170842 read=83439
                                       ->  Hash  (cost=2065381.88..2065381.88 rows=4103939 width=4) (actual time=66442.454..66442.454 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=658341 read=411325 written=2
                                             ->  HashAggregate  (cost=1973043.25..2024342.49 rows=4103939 width=8) (actual time=54565.131..66441.529 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=658341 read=411325 written=2
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671917.50 rows=60225150 width=8) (actual time=0.011..15137.133 rows=59985781 loops=1)
                                                         Buffers: shared hit=658341 read=411325 written=2
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1214.455..1214.455 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=0.027..667.355 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 7.147 ms
 Execution time: 101177.270 ms
(42 rows)

COMMIT;
COMMIT