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) > 315
	)
	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=10212543.95..10212546.70 rows=100 width=39) (actual time=88809.530..88809.761 rows=75 loops=1)
   Buffers: shared hit=1465209 read=970886 written=394
   ->  GroupAggregate  (cost=10212543.95..11043126.51 rows=30203002 width=39) (actual time=88809.526..88809.749 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1465209 read=970886 written=394
         ->  Sort  (cost=10212543.95..10288051.46 rows=30203002 width=39) (actual time=88809.509..88809.540 rows=525 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 66kB
               Buffers: shared hit=1465209 read=970886 written=394
               ->  Hash Join  (cost=2900183.92..5634231.00 rows=30203002 width=39) (actual time=66889.525..88808.303 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1465197 read=970886 written=394
                     ->  Seq Scan on lineitem  (cost=0.00..1676942.03 rows=60406003 width=8) (actual time=0.055..11832.678 rows=59984909 loops=1)
                           Buffers: shared hit=564804 read=508078
                     ->  Hash  (cost=2805777.99..2805777.99 rows=7552474 width=39) (actual time=66412.104..66412.104 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=900393 read=462808 written=394
                           ->  Hash Join  (cost=2189366.45..2805777.99 rows=7552474 width=39) (actual time=57478.804..66411.541 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=900393 read=462808 written=394
                                 ->  Hash Join  (cost=2120338.45..2623462.88 rows=7552474 width=20) (actual time=56418.798..65309.443 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=865115 read=462808 written=394
                                       ->  Seq Scan on orders  (cost=0.00..406090.48 rows=15104948 width=16) (actual time=0.006..3310.602 rows=15000000 loops=1)
                                             Buffers: shared hit=176963 read=78078 written=391
                                       ->  Hash  (cost=2069850.45..2069850.45 rows=4039040 width=4) (actual time=56245.774..56245.774 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=688152 read=384730 written=3
                                             ->  HashAggregate  (cost=1978972.05..2029460.05 rows=4039040 width=8) (actual time=47558.377..56242.214 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999925
                                                   Buffers: shared hit=688152 read=384730 written=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1676942.03 rows=60406003 width=8) (actual time=0.013..13094.170 rows=59984909 loops=1)
                                                         Buffers: shared hit=688152 read=384730 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1047.820..1047.820 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.018..571.889 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 4.094 ms
 Execution time: 89074.504 ms
(42 rows)

COMMIT;
COMMIT