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=10353937.73..10353940.48 rows=100 width=39) (actual time=114251.399..114251.642 rows=75 loops=1)
   Buffers: shared hit=1556828 read=872077 dirtied=1058 written=60
   ->  GroupAggregate  (cost=10353937.73..11182028.13 rows=30112378 width=39) (actual time=114251.395..114251.631 rows=75 loops=1)
         Buffers: shared hit=1556828 read=872077 dirtied=1058 written=60
         ->  Sort  (cost=10353937.73..10429218.68 rows=30112378 width=39) (actual time=114251.375..114251.399 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=1556828 read=872077 dirtied=1058 written=60
               ->  Hash Join  (cost=3064167.91..5790014.72 rows=30112378 width=39) (actual time=85101.078..114248.666 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1556814 read=872077 dirtied=1058 written=60
                     ->  Seq Scan on lineitem  (cost=0.00..1671913.57 rows=60224757 width=8) (actual time=0.055..16336.353 rows=60045303 loops=1)
                           Buffers: shared hit=614010 read=455656
                     ->  Hash  (cost=2970043.31..2970043.31 rows=7529968 width=39) (actual time=84334.256..84334.256 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=942804 read=416421 dirtied=1058 written=60
                           ->  Hash Join  (cost=2185370.16..2970043.31 rows=7529968 width=39) (actual time=74711.543..84333.609 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=942804 read=416421 dirtied=1058 written=60
                                 ->  Hash Join  (cost=2116342.16..2750415.95 rows=7529968 width=20) (actual time=73245.729..82865.059 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=907535 read=416412 dirtied=1058 written=60
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.007..4732.608 rows=15015000 loops=1)
                                             Buffers: shared hit=230846 read=23435 written=46
                                       ->  Hash  (cost=2065161.87..2065161.87 rows=4094423 width=4) (actual time=73042.208..73042.208 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=676689 read=392977 dirtied=1058 written=14
                                             ->  HashAggregate  (cost=1973037.36..2024217.64 rows=4094423 width=8) (actual time=64315.906..73041.541 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=676689 read=392977 dirtied=1058 written=14
                                                   ->  Seq Scan on lineitem  (cost=0.00..1671913.57 rows=60224757 width=8) (actual time=0.016..19269.966 rows=60045303 loops=1)
                                                         Buffers: shared hit=676689 read=392977 dirtied=1058 written=14
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1464.114..1464.114 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35269 read=9
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.013..748.220 rows=1500000 loops=1)
                                             Buffers: shared hit=35269 read=9
 Total runtime: 114471.805 ms
(39 rows)

COMMIT;
COMMIT