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=10374065.47..10374068.22 rows=100 width=39) (actual time=105939.316..105939.768 rows=75 loops=1)
   Buffers: shared hit=1544815 read=888860 dirtied=1077 written=237
   ->  GroupAggregate  (cost=10374065.47..11203807.60 rows=30172441 width=39) (actual time=105939.310..105939.745 rows=75 loops=1)
         Buffers: shared hit=1544815 read=888860 dirtied=1077 written=237
         ->  Sort  (cost=10374065.47..10449496.57 rows=30172441 width=39) (actual time=105939.280..105939.347 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=1544815 read=888860 dirtied=1077 written=237
               ->  Hash Join  (cost=3069320.53..5800602.79 rows=30172441 width=39) (actual time=79461.428..105935.371 rows=525 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1544801 read=888860 dirtied=1077 written=237
                     ->  Seq Scan on lineitem  (cost=0.00..1675246.82 rows=60344882 width=8) (actual time=0.072..14397.635 rows=60045826 loops=1)
                           Buffers: shared hit=950842 read=120956 dirtied=1077 written=232
                     ->  Hash  (cost=2975008.63..2975008.63 rows=7544952 width=39) (actual time=78816.055..78816.055 rows=75 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 6kB
                           Buffers: shared hit=593959 read=767904 written=5
                           ->  Hash Join  (cost=2188955.19..2975008.63 rows=7544952 width=39) (actual time=70445.266..78815.591 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=593959 read=767904 written=5
                                 ->  Hash Join  (cost=2119927.19..2755081.59 rows=7544952 width=20) (actual time=68914.489..77282.367 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=560862 read=765723 written=5
                                       ->  Seq Scan on orders  (cost=0.00..405686.04 rows=15089904 width=16) (actual time=0.026..3993.233 rows=15015000 loops=1)
                                             Buffers: shared hit=254786 read=1
                                       ->  Hash  (cost=2068871.49..2068871.49 rows=4084456 width=4) (actual time=68798.200..68798.200 rows=75 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 3kB
                                             Buffers: shared hit=306076 read=765722 written=5
                                             ->  HashAggregate  (cost=1976971.23..2028026.93 rows=4084456 width=8) (actual time=59107.715..68797.651 rows=75 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=306076 read=765722 written=5
                                                   ->  Seq Scan on lineitem  (cost=0.00..1675246.82 rows=60344882 width=8) (actual time=0.048..16366.345 rows=60045826 loops=1)
                                                         Buffers: shared hit=306076 read=765722 written=5
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1529.090..1529.090 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=33097 read=2181
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.025..782.560 rows=1500000 loops=1)
                                             Buffers: shared hit=33097 read=2181
 Total runtime: 106346.429 ms
(39 rows)

COMMIT;
COMMIT