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=10183638.74..10183641.49 rows=100 width=39) (actual time=95144.018..95144.353 rows=100 loops=1)
   Buffers: shared hit=1521796 read=907107 dirtied=91 written=1467
   ->  GroupAggregate  (cost=10183638.74..11011738.76 rows=30112728 width=39) (actual time=95144.015..95144.342 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1521796 read=907107 dirtied=91 written=1467
         ->  Sort  (cost=10183638.74..10258920.56 rows=30112728 width=39) (actual time=95143.991..95144.030 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=1521796 read=907107 dirtied=91 written=1467
               ->  Hash Join  (cost=2893793.19..5619659.23 rows=30112728 width=39) (actual time=71279.222..95142.475 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1521784 read=907107 dirtied=91 written=1467
                     ->  Seq Scan on lineitem  (cost=0.00..1671920.56 rows=60225456 width=8) (actual time=0.025..12697.970 rows=60045303 loops=1)
                           Buffers: shared hit=698534 read=371132 written=4
                     ->  Hash  (cost=2799668.59..2799668.59 rows=7529968 width=39) (actual time=71079.672..71079.672 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=823250 read=535975 dirtied=91 written=1463
                           ->  Hash Join  (cost=2184633.26..2799668.59 rows=7529968 width=39) (actual time=62121.644..71079.196 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=823250 read=535975 dirtied=91 written=1463
                                 ->  Hash Join  (cost=2115605.26..2617691.07 rows=7529968 width=20) (actual time=60603.587..69557.392 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=823247 read=500700 dirtied=91 written=1463
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.010..3636.669 rows=15015000 loops=1)
                                             Buffers: shared hit=199621 read=54660 dirtied=91 written=1460
                                       ->  Hash  (cost=2064691.89..2064691.89 rows=4073069 width=4) (actual time=60378.017..60378.017 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=623626 read=446040 written=3
                                             ->  HashAggregate  (cost=1973047.84..2023961.20 rows=4073069 width=8) (actual time=51038.629..60377.314 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=623626 read=446040 written=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671920.56 rows=60225456 width=8) (actual time=0.014..14731.936 rows=60045303 loops=1)
                                                         Buffers: shared hit=623626 read=446040 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1494.190..1494.190 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=3 read=35275
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.020..811.865 rows=1500000 loops=1)
                                             Buffers: shared hit=3 read=35275
 Planning time: 4.681 ms
 Execution time: 95465.456 ms
(42 rows)

COMMIT;
COMMIT