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=10372124.93..10372127.68 rows=100 width=39) (actual time=121053.994..121054.348 rows=100 loops=1)
   Buffers: shared hit=1758480 read=675195
   ->  GroupAggregate  (cost=10372124.93..11201878.58 rows=30172860 width=39) (actual time=121053.990..121054.330 rows=100 loops=1)
         Buffers: shared hit=1758480 read=675195
         ->  Sort  (cost=10372124.93..10447557.08 rows=30172860 width=39) (actual time=121053.969..121054.029 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=1758480 read=675195
               ->  Hash Join  (cost=3067291.39..5798596.67 rows=30172860 width=39) (actual time=86771.293..121049.789 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1758466 read=675195
                     ->  Seq Scan on lineitem  (cost=0.00..1675255.19 rows=60345719 width=8) (actual time=0.055..20868.031 rows=60045826 loops=1)
                           Buffers: shared hit=769463 read=302335
                     ->  Hash  (cost=2972979.49..2972979.49 rows=7544952 width=39) (actual time=85630.505..85630.505 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=989003 read=372860
                           ->  Hash Join  (cost=2187379.76..2972979.49 rows=7544952 width=39) (actual time=76047.411..85629.923 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=989003 read=372860
                                 ->  Hash Join  (cost=2118351.76..2753052.45 rows=7544952 width=20) (actual time=74321.331..83901.502 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=953725 read=372860
                                       ->  Seq Scan on orders  (cost=0.00..405686.04 rows=15089904 width=16) (actual time=0.012..4264.765 rows=15015000 loops=1)
                                             Buffers: shared hit=254787
                                       ->  Hash  (cost=2067863.20..2067863.20 rows=4039085 width=4) (actual time=74126.864..74126.864 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=698938 read=372860
                                             ->  HashAggregate  (cost=1976983.79..2027472.35 rows=4039085 width=8) (actual time=64417.629..74126.274 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=698938 read=372860
                                                   ->  Seq Scan on lineitem  (cost=0.00..1675255.19 rows=60345719 width=8) (actual time=0.018..18478.812 rows=60045826 loops=1)
                                                         Buffers: shared hit=698938 read=372860
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1723.425..1723.425 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.013..928.988 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Total runtime: 121335.773 ms
(39 rows)

COMMIT;
COMMIT