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) > 313
	)
	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=10466377.32..10466380.07 rows=100 width=39) (actual time=180978.128..180978.426 rows=100 loops=1)
   Buffers: shared hit=1826537 read=628585 dirtied=14 written=43
   ->  GroupAggregate  (cost=10466377.32..11303535.45 rows=30442114 width=39) (actual time=180978.125..180978.411 rows=100 loops=1)
         Buffers: shared hit=1826537 read=628585 dirtied=14 written=43
         ->  Sort  (cost=10466377.32..10542482.60 rows=30442114 width=39) (actual time=180978.103..180978.141 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: 80kB
               Buffers: shared hit=1826537 read=628585 dirtied=14 written=43
               ->  Hash Join  (cost=3094385.41..5850083.72 rows=30442114 width=39) (actual time=154107.717..180974.603 rows=707 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1826523 read=628585 dirtied=14 written=43
                     ->  Seq Scan on lineitem  (cost=0.00..1690224.29 rows=60884229 width=8) (actual time=0.036..15022.809 rows=60044793 loops=1)
                           Buffers: shared hit=1027079 read=54303
                     ->  Hash  (cost=2999229.91..2999229.91 rows=7612440 width=39) (actual time=153776.268..153776.268 rows=101 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=799444 read=574282 dirtied=14 written=43
                           ->  Hash Join  (cost=2206537.13..2999229.91 rows=7612440 width=39) (actual time=133882.754..153775.495 rows=101 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=799444 read=574282 dirtied=14 written=43
                                 ->  Hash Join  (cost=2137509.13..2777953.11 rows=7612440 width=20) (actual time=129006.286..148896.400 rows=101 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=799441 read=539007 dirtied=14 written=43
                                       ->  Seq Scan on orders  (cost=0.00..409314.79 rows=15224879 width=16) (actual time=0.018..13178.023 rows=15015000 loops=1)
                                             Buffers: shared hit=102249 read=154817 written=30
                                       ->  Hash  (cost=2086486.39..2086486.39 rows=4081820 width=4) (actual time=128654.447..128654.447 rows=101 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=697192 read=384190 dirtied=14 written=13
                                             ->  HashAggregate  (cost=1994645.44..2045668.19 rows=4081820 width=8) (actual time=119483.761..128653.291 rows=101 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014899
                                                   Buffers: shared hit=697192 read=384190 dirtied=14 written=13
                                                   ->  Seq Scan on lineitem  (cost=0.00..1690224.29 rows=60884229 width=8) (actual time=0.020..63817.164 rows=60044793 loops=1)
                                                         Buffers: shared hit=697192 read=384190 dirtied=14 written=13
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=4874.577..4874.577 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=3 read=35275
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.008..4013.102 rows=1500000 loops=1)
                                             Buffers: shared hit=3 read=35275
 Total runtime: 181182.985 ms
(39 rows)

COMMIT;
COMMIT