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=10163520.94..10163523.69 rows=100 width=39) (actual time=92858.114..92858.432 rows=100 loops=1)
   Buffers: shared hit=1572053 read=852104 written=5
   ->  GroupAggregate  (cost=10163520.94..10989979.70 rows=30053046 width=39) (actual time=92858.110..92858.418 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1572053 read=852104 written=5
         ->  Sort  (cost=10163520.94..10238653.55 rows=30053046 width=39) (actual time=92858.073..92858.111 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=1572053 read=852104 written=5
               ->  Hash Join  (cost=2888552.62..5609016.17 rows=30053046 width=39) (actual time=70789.357..92856.324 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1572041 read=852104 written=5
                     ->  Seq Scan on lineitem  (cost=0.00..1668606.93 rows=60106093 width=8) (actual time=0.024..11764.948 rows=60045603 loops=1)
                           Buffers: shared hit=703608 read=363938
                     ->  Hash  (cost=2794615.32..2794615.32 rows=7514984 width=39) (actual time=70587.591..70587.591 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=868433 read=488166 written=5
                           ->  Hash Join  (cost=2180722.81..2794615.32 rows=7514984 width=39) (actual time=64003.239..70585.212 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=868433 read=488166 written=5
                                 ->  Hash Join  (cost=2111694.81..2612862.56 rows=7514984 width=20) (actual time=62746.671..69323.741 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=868431 read=452890 written=5
                                       ->  Seq Scan on orders  (cost=0.00..404074.68 rows=15029968 width=16) (actual time=0.010..3605.718 rows=15015000 loops=1)
                                             Buffers: shared hit=141889 read=111886
                                       ->  Hash  (cost=2060781.45..2060781.45 rows=4073069 width=4) (actual time=62578.875..62578.875 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=726542 read=341004 written=5
                                             ->  HashAggregate  (cost=1969137.40..2020050.76 rows=4073069 width=8) (actual time=50731.779..62578.174 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=726542 read=341004 written=5
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1668606.93 rows=60106093 width=8) (actual time=0.013..13365.291 rows=60045603 loops=1)
                                                         Buffers: shared hit=726542 read=341004 written=5
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1244.157..1244.157 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.012..756.546 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Planning time: 5.355 ms
 Execution time: 93157.994 ms
(42 rows)

COMMIT;
COMMIT