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=10183783.72..10183786.47 rows=100 width=39) (actual time=96232.988..96233.302 rows=100 loops=1)
   Buffers: shared hit=1493495 read=935069 written=10
   ->  GroupAggregate  (cost=10183783.72..11011850.96 rows=30111536 width=39) (actual time=96232.984..96233.288 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1493495 read=935069 written=10
         ->  Sort  (cost=10183783.72..10259062.56 rows=30111536 width=39) (actual time=96232.966..96233.003 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=1493495 read=935069 written=10
               ->  Hash Join  (cost=2894234.92..5619992.38 rows=30111536 width=39) (actual time=74096.522..96231.292 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1493483 read=935069 written=10
                     ->  Seq Scan on lineitem  (cost=0.00..1671853.71 rows=60223071 width=8) (actual time=0.029..11871.640 rows=59985653 loops=1)
                           Buffers: shared hit=628707 read=440916
                     ->  Hash  (cost=2800203.97..2800203.97 rows=7522476 width=39) (actual time=73911.157..73911.157 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=864776 read=494153 written=10
                           ->  Hash Join  (cost=2185476.59..2800203.97 rows=7522476 width=39) (actual time=65390.829..73910.354 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=864776 read=494153 written=10
                                 ->  Hash Join  (cost=2116448.59..2618338.83 rows=7522476 width=20) (actual time=64341.471..72856.107 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=829511 read=494140 written=9
                                       ->  Seq Scan on orders  (cost=0.00..404477.52 rows=15044952 width=16) (actual time=0.009..3015.835 rows=15000000 loops=1)
                                             Buffers: shared hit=254028
                                       ->  Hash  (cost=2065205.90..2065205.90 rows=4099415 width=4) (actual time=64160.995..64160.995 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=575483 read=494140 written=9
                                             ->  HashAggregate  (cost=1972969.06..2024211.75 rows=4099415 width=8) (actual time=52967.310..64158.371 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=575483 read=494140 written=9
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671853.71 rows=60223071 width=8) (actual time=0.013..13623.312 rows=59985653 loops=1)
                                                         Buffers: shared hit=575483 read=494140 written=9
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1035.768..1035.768 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35265 read=13 written=1
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..557.540 rows=1500000 loops=1)
                                             Buffers: shared hit=35265 read=13 written=1
 Planning time: 4.375 ms
 Execution time: 96494.010 ms
(42 rows)

COMMIT;
COMMIT