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) > 314
	)
	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=10260841.53..10260844.28 rows=100 width=39) (actual time=85888.385..85888.654 rows=86 loops=1)
   Buffers: shared hit=1427039 read=1020934 dirtied=453 written=280
   ->  GroupAggregate  (cost=10260841.53..11095537.54 rows=30352582 width=39) (actual time=85888.382..85888.642 rows=86 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1427039 read=1020934 dirtied=453 written=280
         ->  Sort  (cost=10260841.53..10336722.99 rows=30352582 width=39) (actual time=85888.370..85888.406 rows=602 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 72kB
               Buffers: shared hit=1427039 read=1020934 dirtied=453 written=280
               ->  Hash Join  (cost=2911191.41..5658771.46 rows=30352582 width=39) (actual time=62599.403..85887.237 rows=602 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1427027 read=1020934 dirtied=453 written=280
                     ->  Seq Scan on lineitem  (cost=0.00..1685239.65 rows=60705165 width=8) (actual time=0.021..12947.704 rows=60044994 loops=1)
                           Buffers: shared hit=746394 read=331794 written=2
                     ->  Hash  (cost=2816316.86..2816316.86 rows=7589964 width=39) (actual time=62112.158..62112.158 rows=86 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65543kB
                           Buffers: shared hit=680633 read=689140 dirtied=453 written=278
                           ->  Hash Join  (cost=2197515.75..2816316.86 rows=7589964 width=39) (actual time=54919.884..62111.963 rows=86 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=680633 read=689140 dirtied=453 written=278
                                 ->  Hash Join  (cost=2128487.75..2633439.40 rows=7589964 width=20) (actual time=53473.118..60664.934 rows=86 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=680630 read=653865 dirtied=453 written=202
                                       ->  Seq Scan on orders  (cost=0.00..408106.27 rows=15179927 width=16) (actual time=0.010..4056.894 rows=15015000 loops=1)
                                             Buffers: shared hit=137785 read=118522 written=196
                                       ->  Hash  (cost=2078586.94..2078586.94 rows=3992065 width=4) (actual time=53081.152..53081.152 rows=86 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=542845 read=535343 dirtied=453 written=6
                                             ->  HashAggregate  (cost=1988765.48..2038666.29 rows=3992065 width=8) (actual time=46411.080..53080.844 rows=86 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 314::double precision)
                                                   Rows Removed by Filter: 15014914
                                                   Buffers: shared hit=542845 read=535343 dirtied=453 written=6
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1685239.65 rows=60705165 width=8) (actual time=0.038..14121.308 rows=60044994 loops=1)
                                                         Buffers: shared hit=542845 read=535343 dirtied=453 written=6
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1429.610..1429.610 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=3 read=35275 written=76
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.017..830.798 rows=1500000 loops=1)
                                             Buffers: shared hit=3 read=35275 written=76
 Planning time: 4.464 ms
 Execution time: 86056.822 ms
(42 rows)

COMMIT;
COMMIT