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=10154715.68..10154718.43 rows=100 width=39) (actual time=68327.977..68328.265 rows=100 loops=1)
   Buffers: shared hit=1666407 read=755355 dirtied=316
   ->  GroupAggregate  (cost=10154715.68..10980341.14 rows=30022744 width=39) (actual time=68327.975..68328.256 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1666407 read=755355 dirtied=316
         ->  Sort  (cost=10154715.68..10229772.54 rows=30022744 width=39) (actual time=68327.955..68327.988 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=1666407 read=755355 dirtied=316
               ->  Hash Join  (cost=2887296.63..5605022.55 rows=30022744 width=39) (actual time=51649.447..68325.949 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1666395 read=755355 dirtied=316
                     ->  Seq Scan on lineitem  (cost=0.00..1666929.88 rows=60045488 width=8) (actual time=0.029..9874.219 rows=60045669 loops=1)
                           Buffers: shared hit=740199 read=326276
                     ->  Hash  (cost=2793452.98..2793452.98 rows=7507492 width=39) (actual time=51264.946..51264.946 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=926196 read=429079 dirtied=316
                           ->  Hash Join  (cost=2179823.18..2793452.98 rows=7507492 width=39) (actual time=45146.688..51264.388 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=926196 read=429079 dirtied=316
                                 ->  Hash Join  (cost=2110795.18..2611812.60 rows=7507492 width=20) (actual time=44073.614..50190.874 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=926194 read=393803 dirtied=316
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.009..3585.662 rows=15015000 loops=1)
                                             Buffers: shared hit=1182 read=252340 dirtied=254
                                       ->  Hash  (cost=2059495.95..2059495.95 rows=4103939 width=4) (actual time=43912.247..43912.247 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=925012 read=141463 dirtied=62
                                             ->  HashAggregate  (cost=1967157.32..2018456.56 rows=4103939 width=8) (actual time=37288.827..43911.188 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=925012 read=141463 dirtied=62
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1666929.88 rows=60045488 width=8) (actual time=0.021..12420.486 rows=60045669 loops=1)
                                                         Buffers: shared hit=925012 read=141463 dirtied=62
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1063.575..1063.575 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=2 read=35276
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.015..654.341 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276
 Planning time: 7.331 ms
 Execution time: 68375.933 ms
(42 rows)

COMMIT;
COMMIT