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=10410879.32..10410882.07 rows=100 width=39) (actual time=158640.246..158640.604 rows=100 loops=1)
   Buffers: shared hit=1728123 read=715062 dirtied=1 written=12
   ->  GroupAggregate  (cost=10410879.32..11243913.06 rows=30292136 width=39) (actual time=158640.243..158640.590 rows=100 loops=1)
         Buffers: shared hit=1728123 read=715062 dirtied=1 written=12
         ->  Sort  (cost=10410879.32..10486609.66 rows=30292136 width=39) (actual time=158640.226..158640.281 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=1728123 read=715062 dirtied=1 written=12
               ->  Hash Join  (cost=3076295.34..5818408.86 rows=30292136 width=39) (actual time=99666.784..158635.164 rows=784 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1728109 read=715062 dirtied=1 written=12
                     ->  Seq Scan on lineitem  (cost=0.00..1681888.73 rows=60584273 width=8) (actual time=0.070..44101.684 rows=60044176 loops=1)
                           Buffers: shared hit=490386 read=585660 dirtied=1 written=5
                     ->  Hash  (cost=2981608.09..2981608.09 rows=7574980 width=39) (actual time=99165.836..99165.836 rows=112 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=1237723 read=129402 written=7
                           ->  Hash Join  (cost=2193523.34..2981608.09 rows=7574980 width=39) (actual time=84979.487..99165.020 rows=112 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1237723 read=129402 written=7
                                 ->  Hash Join  (cost=2124495.34..2761080.49 rows=7574980 width=20) (actual time=82982.859..97164.937 rows=112 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1202517 read=129330 written=7
                                       ->  Seq Scan on orders  (cost=0.00..407300.59 rows=15149959 width=16) (actual time=0.017..7728.999 rows=15015000 loops=1)
                                             Buffers: shared hit=239126 read=16675 written=7
                                       ->  Hash  (cost=2074607.75..2074607.75 rows=3991007 width=4) (actual time=82871.726..82871.726 rows=112 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=963391 read=112655
                                             ->  HashAggregate  (cost=1984810.10..2034697.68 rows=3991007 width=8) (actual time=73987.285..82871.008 rows=112 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014888
                                                   Buffers: shared hit=963391 read=112655
                                                   ->  Seq Scan on lineitem  (cost=0.00..1681888.73 rows=60584273 width=8) (actual time=0.026..25189.323 rows=60044176 loops=1)
                                                         Buffers: shared hit=963391 read=112655
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1994.588..1994.588 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35206 read=72
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.014..1184.862 rows=1500000 loops=1)
                                             Buffers: shared hit=35206 read=72
 Total runtime: 158866.578 ms
(39 rows)

COMMIT;
COMMIT