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=10174948.58..10174951.33 rows=100 width=39) (actual time=86848.381..86848.711 rows=99 loops=1)
   Buffers: shared hit=1515120 read=911414 dirtied=649 written=590
   ->  GroupAggregate  (cost=10174948.58..11002225.34 rows=30082791 width=39) (actual time=86848.378..86848.700 rows=99 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1515120 read=911414 dirtied=649 written=590
         ->  Sort  (cost=10174948.58..10250155.56 rows=30082791 width=39) (actual time=86848.366..86848.408 rows=693 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 79kB
               Buffers: shared hit=1515120 read=911414 dirtied=649 written=590
               ->  Hash Join  (cost=2892561.17..5615722.67 rows=30082791 width=39) (actual time=65082.001..86847.078 rows=693 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1515108 read=911414 dirtied=649 written=590
                     ->  Seq Scan on lineitem  (cost=0.00..1670263.82 rows=60165582 width=8) (actual time=0.030..12461.896 rows=59985653 loops=1)
                           Buffers: shared hit=571635 read=496973 dirtied=649 written=585
                     ->  Hash  (cost=2798530.21..2798530.21 rows=7522476 width=39) (actual time=64516.631..64516.631 rows=99 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65543kB
                           Buffers: shared hit=943473 read=414441 written=5
                           ->  Hash Join  (cost=2183757.59..2798530.21 rows=7522476 width=39) (actual time=57346.833..64516.293 rows=99 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=943473 read=414441 written=5
                                 ->  Hash Join  (cost=2114729.59..2616665.07 rows=7522476 width=20) (actual time=56167.306..63332.682 rows=99 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=912003 read=410633 written=4
                                       ->  Seq Scan on orders  (cost=0.00..404477.52 rows=15044952 width=16) (actual time=0.013..3716.568 rows=15000000 loops=1)
                                             Buffers: shared hit=239571 read=14457
                                       ->  Hash  (cost=2063430.36..2063430.36 rows=4103939 width=4) (actual time=55987.671..55987.671 rows=99 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=672432 read=396176 written=4
                                             ->  HashAggregate  (cost=1971091.73..2022390.97 rows=4103939 width=8) (actual time=50016.687..55987.220 rows=99 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 14999901
                                                   Buffers: shared hit=672432 read=396176 written=4
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1670263.82 rows=60165582 width=8) (actual time=0.016..14318.569 rows=59985653 loops=1)
                                                         Buffers: shared hit=672432 read=396176 written=4
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1163.940..1163.940 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=31470 read=3808 written=1
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.024..659.867 rows=1500000 loops=1)
                                             Buffers: shared hit=31470 read=3808 written=1
 Planning time: 4.638 ms
 Execution time: 87014.392 ms
(42 rows)

COMMIT;
COMMIT