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=10323160.12..10323162.87 rows=100 width=39) (actual time=72918.764..72919.061 rows=99 loops=1)
   Buffers: shared hit=1742634 read=679130 dirtied=254
   ->  GroupAggregate  (cost=10323160.12..11148780.19 rows=30022548 width=39) (actual time=72918.759..72919.046 rows=99 loops=1)
         Buffers: shared hit=1742634 read=679130 dirtied=254
         ->  Sort  (cost=10323160.12..10398216.49 rows=30022548 width=39) (actual time=72918.732..72918.768 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=1742634 read=679130 dirtied=254
               ->  Hash Join  (cost=3055781.10..5773496.25 rows=30022548 width=39) (actual time=54571.745..72915.219 rows=693 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1742620 read=679130 dirtied=254
                     ->  Seq Scan on lineitem  (cost=0.00..1666925.96 rows=60045096 width=8) (actual time=0.012..11193.648 rows=60045669 loops=1)
                           Buffers: shared hit=754090 read=312385
                     ->  Hash  (cost=2961937.46..2961937.46 rows=7507492 width=39) (actual time=54157.944..54157.944 rows=99 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 7kB
                           Buffers: shared hit=988530 read=366745 dirtied=254
                           ->  Hash Join  (cost=2179484.25..2961937.46 rows=7507492 width=39) (actual time=46837.866..54157.039 rows=99 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=988530 read=366745 dirtied=254
                                 ->  Hash Join  (cost=2110456.25..2742759.62 rows=7507492 width=20) (actual time=45877.271..53192.306 rows=99 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=988528 read=331469 dirtied=254
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.006..3497.721 rows=15015000 loops=1)
                                             Buffers: shared hit=326 read=253196 dirtied=254
                                       ->  Hash  (cost=2059275.96..2059275.96 rows=4094423 width=4) (actual time=45710.371..45710.371 rows=99 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=988202 read=78273
                                             ->  HashAggregate  (cost=1967151.44..2018331.73 rows=4094423 width=8) (actual time=38324.746..45709.057 rows=99 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014901
                                                   Buffers: shared hit=988202 read=78273
                                                   ->  Seq Scan on lineitem  (cost=0.00..1666925.96 rows=60045096 width=8) (actual time=0.009..13381.684 rows=60045669 loops=1)
                                                         Buffers: shared hit=988202 read=78273
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=958.277..958.277 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.010..552.064 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Total runtime: 73001.250 ms
(39 rows)

COMMIT;
COMMIT