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) > 313
	)
	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=10184828.20..10184830.95 rows=100 width=39) (actual time=88718.185..88718.492 rows=99 loops=1)
   Buffers: shared hit=1567819 read=861084 written=45
   ->  GroupAggregate  (cost=10184828.20..11012928.72 rows=30112746 width=39) (actual time=88718.182..88718.477 rows=99 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1567819 read=861084 written=45
         ->  Sort  (cost=10184828.20..10260110.07 rows=30112746 width=39) (actual time=88718.169..88718.216 rows=693 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 79kB
               Buffers: shared hit=1567819 read=861084 written=45
               ->  Hash Join  (cost=2894979.29..5620846.32 rows=30112746 width=39) (actual time=69079.920..88716.883 rows=693 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1567807 read=861084 written=45
                     ->  Seq Scan on lineitem  (cost=0.00..1671920.92 rows=60225492 width=8) (actual time=0.027..11257.350 rows=60045303 loops=1)
                           Buffers: shared hit=767362 read=302304
                     ->  Hash  (cost=2800854.69..2800854.69 rows=7529968 width=39) (actual time=68478.821..68478.821 rows=99 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65543kB
                           Buffers: shared hit=800445 read=558780 written=45
                           ->  Hash Join  (cost=2185555.90..2800854.69 rows=7529968 width=39) (actual time=62001.735..68474.719 rows=99 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=800445 read=558780 written=45
                                 ->  Hash Join  (cost=2116527.90..2618877.17 rows=7529968 width=20) (actual time=60699.126..67164.497 rows=99 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=765190 read=558757 written=45
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.008..3554.246 rows=15015000 loops=1)
                                             Buffers: shared hit=161598 read=92683 written=42
                                       ->  Hash  (cost=2065285.22..2065285.22 rows=4099415 width=4) (actual time=60556.752..60556.752 rows=99 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=603592 read=466074 written=3
                                             ->  HashAggregate  (cost=1973048.38..2024291.07 rows=4099415 width=8) (actual time=49304.054..60556.046 rows=99 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014901
                                                   Buffers: shared hit=603592 read=466074 written=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671920.92 rows=60225492 width=8) (actual time=0.020..13460.621 rows=60045303 loops=1)
                                                         Buffers: shared hit=603592 read=466074 written=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1017.181..1017.181 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35255 read=23
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.022..552.120 rows=1500000 loops=1)
                                             Buffers: shared hit=35255 read=23
 Planning time: 4.217 ms
 Execution time: 89019.052 ms
(42 rows)

COMMIT;
COMMIT