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=10318542.79..10318545.54 rows=100 width=39) (actual time=143578.637..143578.997 rows=100 loops=1)
   Buffers: shared hit=1373700 read=1048064 written=144
   ->  GroupAggregate  (cost=10318542.79..11144167.04 rows=30022700 width=39) (actual time=143578.633..143578.979 rows=100 loops=1)
         Buffers: shared hit=1373700 read=1048064 written=144
         ->  Sort  (cost=10318542.79..10393599.54 rows=30022700 width=39) (actual time=143578.608..143578.661 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=1373700 read=1048064 written=144
               ->  Hash Join  (cost=3051131.94..5768855.45 rows=30022700 width=39) (actual time=100798.013..143573.165 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1373686 read=1048064 written=144
                     ->  Seq Scan on lineitem  (cost=0.00..1666929.00 rows=60045400 width=8) (actual time=0.053..28351.723 rows=59985329 loops=1)
                           Buffers: shared hit=192712 read=873763 written=1
                     ->  Hash  (cost=2957288.29..2957288.29 rows=7507492 width=39) (actual time=99945.676..99945.676 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=1180974 read=174301 written=143
                           ->  Hash Join  (cost=2175869.25..2957288.29 rows=7507492 width=39) (actual time=87522.117..99945.017 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1180974 read=174301 written=143
                                 ->  Hash Join  (cost=2106841.25..2738110.46 rows=7507492 width=20) (actual time=85797.264..98217.464 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=1146267 read=173730 written=143
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.015..6612.785 rows=15000000 loops=1)
                                             Buffers: shared hit=158876 read=94646 written=135
                                       ->  Hash  (cost=2056953.66..2056953.66 rows=3991007 width=4) (actual time=85517.245..85517.245 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=987391 read=79084 written=8
                                             ->  HashAggregate  (cost=1967156.00..2017043.59 rows=3991007 width=8) (actual time=75466.884..85516.217 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999889
                                                   Buffers: shared hit=987391 read=79084 written=8
                                                   ->  Seq Scan on lineitem  (cost=0.00..1666929.00 rows=60045400 width=8) (actual time=0.012..23666.345 rows=59985329 loops=1)
                                                         Buffers: shared hit=987391 read=79084 written=8
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1723.035..1723.035 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=34707 read=571
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.022..865.059 rows=1500000 loops=1)
                                             Buffers: shared hit=34707 read=571
 Total runtime: 143865.615 ms
(39 rows)

COMMIT;
COMMIT