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=10169939.56..10169942.31 rows=100 width=39) (actual time=75777.399..75777.741 rows=100 loops=1)
   Buffers: shared hit=1702594 read=723940 written=34
   ->  GroupAggregate  (cost=10169939.56..10997219.09 rows=30082892 width=39) (actual time=75777.396..75777.730 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1702594 read=723940 written=34
         ->  Sort  (cost=10169939.56..10245146.79 rows=30082892 width=39) (actual time=75777.382..75777.419 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=1702594 read=723940 written=34
               ->  Hash Join  (cost=2887529.85..5610696.88 rows=30082892 width=39) (actual time=55235.377..75775.990 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1702582 read=723940 written=34
                     ->  Seq Scan on lineitem  (cost=0.00..1670265.83 rows=60165783 width=8) (actual time=0.045..12603.825 rows=60045379 loops=1)
                           Buffers: shared hit=651817 read=416791 written=2
                     ->  Hash  (cost=2793498.90..2793498.90 rows=7522476 width=39) (actual time=55018.960..55018.960 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=1050765 read=307149 written=32
                           ->  Hash Join  (cost=2179845.02..2793498.90 rows=7522476 width=39) (actual time=48489.457..55018.643 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1050765 read=307149 written=32
                                 ->  Hash Join  (cost=2110817.02..2611633.76 rows=7522476 width=20) (actual time=47438.445..53967.296 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=1022447 read=300189 written=32
                                       ->  Seq Scan on orders  (cost=0.00..404477.52 rows=15044952 width=16) (actual time=0.009..3656.169 rows=15015000 loops=1)
                                             Buffers: shared hit=162032 read=91996 written=22
                                       ->  Hash  (cost=2060916.21..2060916.21 rows=3992065 width=4) (actual time=47285.564..47285.564 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=860415 read=208193 written=10
                                             ->  HashAggregate  (cost=1971094.75..2020995.56 rows=3992065 width=8) (actual time=41704.901..47285.116 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=860415 read=208193 written=10
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1670265.83 rows=60165783 width=8) (actual time=0.012..14152.642 rows=60045379 loops=1)
                                                         Buffers: shared hit=860415 read=208193 written=10
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1043.712..1043.712 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=28318 read=6960
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.012..594.392 rows=1500000 loops=1)
                                             Buffers: shared hit=28318 read=6960
 Planning time: 4.468 ms
 Execution time: 75900.119 ms
(42 rows)

COMMIT;
COMMIT