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) > 312
	)
	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=10433734.66..10433737.41 rows=100 width=39) (actual time=137401.224..137401.830 rows=100 loops=1)
   Buffers: shared hit=1511844 read=936149 dirtied=979 written=798
   ->  GroupAggregate  (cost=10433734.66..11268434.74 rows=30352730 width=39) (actual time=137401.220..137401.812 rows=100 loops=1)
         Buffers: shared hit=1511844 read=936149 dirtied=979 written=798
         ->  Sort  (cost=10433734.66..10509616.49 rows=30352730 width=39) (actual time=137401.189..137401.306 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: 86kB
               Buffers: shared hit=1511844 read=936149 dirtied=979 written=798
               ->  Hash Join  (cost=3084044.44..5831641.63 rows=30352730 width=39) (actual time=95942.420..137395.564 rows=791 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1511830 read=936149 dirtied=979 written=798
                     ->  Seq Scan on lineitem  (cost=0.00..1685251.61 rows=60705461 width=8) (actual time=0.030..26211.381 rows=59984852 loops=1)
                           Buffers: shared hit=555255 read=522942 dirtied=979 written=787
                     ->  Hash  (cost=2989169.89..2989169.89 rows=7589964 width=39) (actual time=95813.496..95813.496 rows=113 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=956575 read=413207 written=11
                           ->  Hash Join  (cost=2199135.62..2989169.89 rows=7589964 width=39) (actual time=84726.143..95812.762 rows=113 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=956575 read=413207 written=11
                                 ->  Hash Join  (cost=2130107.62..2768342.61 rows=7589964 width=20) (actual time=82544.983..93629.383 rows=113 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=953571 read=380933 written=11
                                       ->  Seq Scan on orders  (cost=0.00..408106.27 rows=15179927 width=16) (actual time=0.025..5181.427 rows=15000000 loops=1)
                                             Buffers: shared hit=254847 read=1460
                                       ->  Hash  (cost=2079633.08..2079633.08 rows=4037963 width=4) (actual time=82445.280..82445.280 rows=113 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=698724 read=379473 written=11
                                             ->  HashAggregate  (cost=1988778.92..2039253.45 rows=4037963 width=8) (actual time=73011.341..82444.593 rows=113 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999887
                                                   Buffers: shared hit=698724 read=379473 written=11
                                                   ->  Seq Scan on lineitem  (cost=0.00..1685251.61 rows=60705461 width=8) (actual time=0.029..24477.186 rows=59984852 loops=1)
                                                         Buffers: shared hit=698724 read=379473 written=11
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2179.456..2179.456 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=3004 read=32274
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.011..1365.797 rows=1500000 loops=1)
                                             Buffers: shared hit=3004 read=32274
 Total runtime: 137611.446 ms
(39 rows)

COMMIT;
COMMIT