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) > 314
	)
	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=10186439.52..10186442.27 rows=100 width=39) (actual time=95379.271..95379.532 rows=84 loops=1)
   Buffers: shared hit=1307251 read=1122644 dirtied=1393 written=4526
   ->  GroupAggregate  (cost=10186439.52..11014916.34 rows=30126430 width=39) (actual time=95379.268..95379.520 rows=84 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1307251 read=1122644 dirtied=1393 written=4526
         ->  Sort  (cost=10186439.52..10261755.59 rows=30126430 width=39) (actual time=95379.226..95379.264 rows=588 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 70kB
               Buffers: shared hit=1307251 read=1122644 dirtied=1393 written=4526
               ->  Hash Join  (cost=2893168.94..5620284.59 rows=30126430 width=39) (actual time=72394.031..95377.995 rows=588 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1307239 read=1122644 dirtied=1393 written=4526
                     ->  Seq Scan on lineitem  (cost=0.00..1672690.60 rows=60252860 width=8) (actual time=0.058..11932.408 rows=59985781 loops=1)
                           Buffers: shared hit=503427 read=566735 dirtied=727 written=690
                     ->  Hash  (cost=2799044.34..2799044.34 rows=7529968 width=39) (actual time=71538.920..71538.920 rows=84 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=803812 read=555909 dirtied=666 written=3836
                           ->  Hash Join  (cost=2184349.30..2799044.34 rows=7529968 width=39) (actual time=62574.988..71535.212 rows=84 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=803812 read=555909 dirtied=666 written=3836
                                 ->  Hash Join  (cost=2115321.30..2617066.82 rows=7529968 width=20) (actual time=61215.741..70174.379 rows=84 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=803811 read=520632 dirtied=666 written=481
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.009..3451.199 rows=15000000 loops=1)
                                             Buffers: shared hit=222149 read=32132 written=56
                                       ->  Hash  (cost=2064833.30..2064833.30 rows=4039040 width=4) (actual time=61048.787..61048.787 rows=84 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=581662 read=488500 dirtied=666 written=425
                                             ->  HashAggregate  (cost=1973954.90..2024442.90 rows=4039040 width=8) (actual time=49268.244..61046.210 rows=84 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 14999916
                                                   Buffers: shared hit=581662 read=488500 dirtied=666 written=425
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1672690.60 rows=60252860 width=8) (actual time=0.009..13462.282 rows=59985781 loops=1)
                                                         Buffers: shared hit=581662 read=488500 dirtied=666 written=425
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1344.741..1344.741 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=1 read=35277 written=3355
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.015..867.119 rows=1500000 loops=1)
                                             Buffers: shared hit=1 read=35277 written=3355
 Planning time: 4.668 ms
 Execution time: 95787.540 ms
(42 rows)

COMMIT;
COMMIT