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=10164873.69..10164876.44 rows=100 width=39) (actual time=105849.128..105849.461 rows=100 loops=1)
   Buffers: shared hit=1353674 read=1070483 written=4
   ->  GroupAggregate  (cost=10164873.69..10991328.28 rows=30052894 width=39) (actual time=105849.126..105849.445 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1353674 read=1070483 written=4
         ->  Sort  (cost=10164873.69..10240005.93 rows=30052894 width=39) (actual time=105849.104..105849.150 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=1353674 read=1070483 written=4
               ->  Hash Join  (cost=2889937.21..5610392.40 rows=30052894 width=39) (actual time=81459.314..105847.367 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1353662 read=1070483 written=4
                     ->  Seq Scan on lineitem  (cost=0.00..1668603.89 rows=60105789 width=8) (actual time=0.029..13069.387 rows=60045603 loops=1)
                           Buffers: shared hit=591315 read=476231
                     ->  Hash  (cost=2795999.91..2795999.91 rows=7514984 width=39) (actual time=81383.870..81383.870 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=762347 read=594252 written=4
                           ->  Hash Join  (cost=2181798.70..2795999.91 rows=7514984 width=39) (actual time=71515.587..81383.142 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=762347 read=594252 written=4
                                 ->  Hash Join  (cost=2112770.70..2614247.15 rows=7514984 width=20) (actual time=70465.165..80329.092 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=732384 read=588937 written=4
                                       ->  Seq Scan on orders  (cost=0.00..404074.68 rows=15029968 width=16) (actual time=0.012..3876.324 rows=15015000 loops=1)
                                             Buffers: shared hit=217996 read=35779 written=1
                                       ->  Hash  (cost=2061471.46..2061471.46 rows=4103939 width=4) (actual time=70257.587..70257.587 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=514388 read=553158 written=3
                                             ->  HashAggregate  (cost=1969132.83..2020432.07 rows=4103939 width=8) (actual time=56299.356..70256.440 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=514388 read=553158 written=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1668603.89 rows=60105789 width=8) (actual time=0.015..15428.031 rows=60045603 loops=1)
                                                         Buffers: shared hit=514388 read=553158 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1041.936..1041.936 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=29963 read=5315
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.014..578.809 rows=1500000 loops=1)
                                             Buffers: shared hit=29963 read=5315
 Planning time: 4.376 ms
 Execution time: 106144.626 ms
(42 rows)

COMMIT;
COMMIT