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=10220630.30..10220633.05 rows=100 width=39) (actual time=80820.704..80821.009 rows=100 loops=1)
   Buffers: shared hit=1359401 read=1077890 written=4619
   ->  GroupAggregate  (cost=10220630.30..11051683.49 rows=30220116 width=39) (actual time=80820.702..80820.998 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1359401 read=1077890 written=4619
         ->  Sort  (cost=10220630.30..10296180.59 rows=30220116 width=39) (actual time=80820.685..80820.717 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=1359401 read=1077890 written=4619
               ->  Hash Join  (cost=2904012.22..5639598.61 rows=30220116 width=39) (actual time=58811.200..80819.367 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1359389 read=1077890 written=4619
                     ->  Seq Scan on lineitem  (cost=0.00..1677882.32 rows=60440232 width=8) (actual time=0.028..11853.244 rows=59984909 loops=1)
                           Buffers: shared hit=521389 read=552091
                     ->  Hash  (cost=2809606.30..2809606.30 rows=7552474 width=39) (actual time=58605.591..58605.591 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=838000 read=525799 written=4619
                           ->  Hash Join  (cost=2192591.00..2809606.30 rows=7552474 width=39) (actual time=51941.069..58605.230 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=838000 read=525799 written=4619
                                 ->  Hash Join  (cost=2123563.00..2627291.19 rows=7552474 width=20) (actual time=50591.210..57255.017 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=837998 read=490523 written=290
                                       ->  Seq Scan on orders  (cost=0.00..406090.48 rows=15104948 width=16) (actual time=0.010..3648.288 rows=15000000 loops=1)
                                             Buffers: shared hit=166477 read=88564 written=285
                                       ->  Hash  (cost=2072320.32..2072320.32 rows=4099415 width=4) (actual time=49859.947..49859.947 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=671521 read=401959 written=5
                                             ->  HashAggregate  (cost=1980083.48..2031326.17 rows=4099415 width=8) (actual time=43475.837..49859.317 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999889
                                                   Buffers: shared hit=671521 read=401959 written=5
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1677882.32 rows=60440232 width=8) (actual time=0.016..13491.297 rows=59984909 loops=1)
                                                         Buffers: shared hit=671521 read=401959 written=5
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1337.102..1337.102 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=4329
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.018..861.174 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=4329
 Planning time: 4.533 ms
 Execution time: 81035.465 ms
(42 rows)

COMMIT;
COMMIT