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=10193692.40..10193695.15 rows=100 width=39) (actual time=79505.137..79505.376 rows=84 loops=1)
   Buffers: shared hit=1243850 read=1187454 dirtied=1271 written=224
   ->  GroupAggregate  (cost=10193692.40..11022616.35 rows=30142689 width=39) (actual time=79505.134..79505.366 rows=84 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1243850 read=1187454 dirtied=1271 written=224
         ->  Sort  (cost=10193692.40..10269049.12 rows=30142689 width=39) (actual time=79505.114..79505.148 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=1243850 read=1187454 dirtied=1271 written=224
               ->  Hash Join  (cost=2896368.03..5624955.92 rows=30142689 width=39) (actual time=59901.123..79503.920 rows=588 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1243838 read=1187454 dirtied=1271 written=224
                     ->  Seq Scan on lineitem  (cost=0.00..1673593.78 rows=60285378 width=8) (actual time=0.058..10787.417 rows=60046221 loops=1)
                           Buffers: shared hit=466026 read=604714 dirtied=228 written=216
                     ->  Hash  (cost=2802149.78..2802149.78 rows=7537460 width=39) (actual time=59417.511..59417.511 rows=84 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=777812 read=582740 dirtied=1043 written=8
                           ->  Hash Join  (cost=2186557.05..2802149.78 rows=7537460 width=39) (actual time=52764.787..59416.954 rows=84 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=777812 read=582740 dirtied=1043 written=8
                                 ->  Hash Join  (cost=2117529.05..2620059.88 rows=7537460 width=20) (actual time=51818.372..58466.368 rows=84 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=742551 read=582723 dirtied=1043 written=8
                                       ->  Seq Scan on orders  (cost=0.00..405283.20 rows=15074920 width=16) (actual time=0.009..3346.489 rows=15015000 loops=1)
                                             Buffers: shared hit=153735 read=100799 written=4
                                       ->  Hash  (cost=2066633.20..2066633.20 rows=4071668 width=4) (actual time=51665.911..51665.911 rows=84 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=588816 read=481924 dirtied=1043 written=4
                                             ->  HashAggregate  (cost=1975020.67..2025916.52 rows=4071668 width=8) (actual time=43455.444..51664.907 rows=84 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014916
                                                   Buffers: shared hit=588816 read=481924 dirtied=1043 written=4
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1673593.78 rows=60285378 width=8) (actual time=0.011..12066.026 rows=60046221 loops=1)
                                                         Buffers: shared hit=588816 read=481924 dirtied=1043 written=4
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=936.543..936.543 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35261 read=17
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.030..480.318 rows=1500000 loops=1)
                                             Buffers: shared hit=35261 read=17
 Planning time: 3.636 ms
 Execution time: 79749.424 ms
(42 rows)

COMMIT;
COMMIT