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=10372124.93..10372127.68 rows=100 width=39) (actual time=119698.044..119698.444 rows=75 loops=1)
   Buffers: shared hit=1867129 read=566546
   ->  GroupAggregate  (cost=10372124.93..11201878.58 rows=30172860 width=39) (actual time=119698.041..119698.429 rows=75 loops=1)
         Buffers: shared hit=1867129 read=566546
         ->  Sort  (cost=10372124.93..10447557.08 rows=30172860 width=39) (actual time=119698.015..119698.083 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=1867129 read=566546
               ->  Hash Join  (cost=3067291.39..5798596.67 rows=30172860 width=39) (actual time=86116.214..119694.232 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1867115 read=566546
                     ->  Seq Scan on lineitem  (cost=0.00..1675255.19 rows=60345719 width=8) (actual time=0.031..19946.196 rows=60045826 loops=1)
                           Buffers: shared hit=696217 read=375581
                     ->  Hash  (cost=2972979.49..2972979.49 rows=7544952 width=39) (actual time=85662.291..85662.291 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=1170898 read=190965
                           ->  Hash Join  (cost=2187379.76..2972979.49 rows=7544952 width=39) (actual time=76948.185..85661.462 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1170898 read=190965
                                 ->  Hash Join  (cost=2118351.76..2753052.45 rows=7544952 width=20) (actual time=75080.880..83791.087 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1135620 read=190965
                                       ->  Seq Scan on orders  (cost=0.00..405686.04 rows=15089904 width=16) (actual time=0.016..4115.217 rows=15015000 loops=1)
                                             Buffers: shared hit=254787
                                       ->  Hash  (cost=2067863.20..2067863.20 rows=4039085 width=4) (actual time=74857.743..74857.743 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=880833 read=190965
                                             ->  HashAggregate  (cost=1976983.79..2027472.35 rows=4039085 width=8) (actual time=64853.424..74857.276 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=880833 read=190965
                                                   ->  Seq Scan on lineitem  (cost=0.00..1675255.19 rows=60345719 width=8) (actual time=0.044..18860.824 rows=60045826 loops=1)
                                                         Buffers: shared hit=880833 read=190965
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1865.735..1865.735 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.014..954.713 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 120078.564 ms
(39 rows)

COMMIT;
COMMIT