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=10349324.09..10349326.84 rows=100 width=39) (actual time=183740.738..183741.321 rows=100 loops=1)
   Buffers: shared hit=1072721 read=1356184 written=3
   ->  GroupAggregate  (cost=10349324.09..11177418.69 rows=30112531 width=39) (actual time=183740.735..183741.297 rows=100 loops=1)
         Buffers: shared hit=1072721 read=1356184 written=3
         ->  Sort  (cost=10349324.09..10424605.42 rows=30112531 width=39) (actual time=183740.712..183740.790 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: 85kB
               Buffers: shared hit=1072721 read=1356184 written=3
               ->  Hash Join  (cost=3059518.77..5785373.97 rows=30112531 width=39) (actual time=127588.029..183734.872 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1072707 read=1356184 written=3
                     ->  Seq Scan on lineitem  (cost=0.00..1671916.62 rows=60225062 width=8) (actual time=0.034..41590.586 rows=60045303 loops=1)
                           Buffers: shared hit=302562 read=767104
                     ->  Hash  (cost=2965394.17..2965394.17 rows=7529968 width=39) (actual time=126606.352..126606.352 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=770145 read=589080 written=3
                           ->  Hash Join  (cost=2181755.18..2965394.17 rows=7529968 width=39) (actual time=115598.337..126605.679 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=770145 read=589080 written=3
                                 ->  Hash Join  (cost=2112727.18..2745766.81 rows=7529968 width=20) (actual time=113236.542..124241.595 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=734867 read=589080 written=3
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.014..6222.577 rows=15015000 loops=1)
                                             Buffers: shared hit=253994 read=287
                                       ->  Hash  (cost=2062839.59..2062839.59 rows=3991007 width=4) (actual time=112987.848..112987.848 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=480873 read=588793 written=3
                                             ->  HashAggregate  (cost=1973041.93..2022929.52 rows=3991007 width=8) (actual time=104980.589..112986.498 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=480873 read=588793 written=3
                                                   ->  Seq Scan on lineitem  (cost=0.00..1671916.62 rows=60225062 width=8) (actual time=0.132..46539.128 rows=60045303 loops=1)
                                                         Buffers: shared hit=480873 read=588793 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=2360.175..2360.175 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=0.191..1514.776 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 184023.109 ms
(39 rows)

COMMIT;
COMMIT