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=10176456.99..10176459.74 rows=100 width=39) (actual time=81977.828..81978.130 rows=100 loops=1)
   Buffers: shared hit=1419305 read=1007229 dirtied=688 written=614
   ->  GroupAggregate  (cost=10176456.99..11003738.17 rows=30082952 width=39) (actual time=81977.825..81978.120 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1419305 read=1007229 dirtied=688 written=614
         ->  Sort  (cost=10176456.99..10251664.37 rows=30082952 width=39) (actual time=81977.804..81977.848 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=1419305 read=1007229 dirtied=688 written=614
               ->  Hash Join  (cost=2894032.58..5617202.91 rows=30082952 width=39) (actual time=62617.491..81976.093 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1419293 read=1007229 dirtied=688 written=614
                     ->  Seq Scan on lineitem  (cost=0.00..1670267.03 rows=60165903 width=8) (actual time=0.027..10850.700 rows=60045379 loops=1)
                           Buffers: shared hit=593760 read=474848 dirtied=502 written=502
                     ->  Hash  (cost=2800001.63..2800001.63 rows=7522476 width=39) (actual time=62247.899..62247.899 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=825533 read=532381 dirtied=186 written=112
                           ->  Hash Join  (cost=2184903.10..2800001.63 rows=7522476 width=39) (actual time=54236.014..62247.350 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=825533 read=532381 dirtied=186 written=112
                                 ->  Hash Join  (cost=2115875.10..2618136.49 rows=7522476 width=20) (actual time=52920.164..60925.864 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=825531 read=497105 dirtied=186 written=3
                                       ->  Seq Scan on orders  (cost=0.00..404477.52 rows=15044952 width=16) (actual time=0.006..3042.694 rows=15015000 loops=1)
                                             Buffers: shared hit=186084 read=67944 dirtied=183 written=3
                                       ->  Hash  (cost=2064168.47..2064168.47 rows=4136530 width=4) (actual time=52719.060..52719.060 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=639447 read=429161 dirtied=3
                                             ->  HashAggregate  (cost=1971096.55..2022803.17 rows=4136530 width=8) (actual time=40933.661..52717.860 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=639447 read=429161 dirtied=3
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1670267.03 rows=60165903 width=8) (actual time=0.012..12444.359 rows=60045379 loops=1)
                                                         Buffers: shared hit=639447 read=429161 dirtied=3
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1297.568..1297.568 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276 written=109
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.013..701.220 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=109
 Planning time: 4.194 ms
 Execution time: 82319.881 ms
(42 rows)

COMMIT;
COMMIT