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=10151768.36..10151771.11 rows=100 width=39) (actual time=97240.582..97240.894 rows=100 loops=1)
   Buffers: shared hit=1704587 read=717175 written=5285
   ->  GroupAggregate  (cost=10151768.36..10977390.85 rows=30022636 width=39) (actual time=97240.579..97240.879 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1704587 read=717175 written=5285
         ->  Sort  (cost=10151768.36..10226824.95 rows=30022636 width=39) (actual time=97240.560..97240.601 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=1704587 read=717175 written=5285
               ->  Hash Join  (cost=2884372.94..5602092.92 rows=30022636 width=39) (actual time=75355.995..97238.989 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1704575 read=717175 written=5285
                     ->  Seq Scan on lineitem  (cost=0.00..1666927.72 rows=60045272 width=8) (actual time=0.011..11968.192 rows=59985329 loops=1)
                           Buffers: shared hit=696684 read=369791
                     ->  Hash  (cost=2790529.29..2790529.29 rows=7507492 width=39) (actual time=74629.483..74629.483 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=1007891 read=347384 written=5285
                           ->  Hash Join  (cost=2177548.48..2790529.29 rows=7507492 width=39) (actual time=65760.442..74624.322 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=1007891 read=347384 written=5285
                                 ->  Hash Join  (cost=2108520.48..2608888.91 rows=7507492 width=20) (actual time=64675.368..73532.208 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=972652 read=347345 written=5285
                                       ->  Seq Scan on orders  (cost=0.00..403671.84 rows=15014984 width=16) (actual time=0.011..3847.702 rows=15000000 loops=1)
                                             Buffers: shared hit=130643 read=122879 written=5274
                                       ->  Hash  (cost=2058032.48..2058032.48 rows=4039040 width=4) (actual time=64466.368..64466.368 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=842009 read=224466 written=11
                                             ->  HashAggregate  (cost=1967154.08..2017642.08 rows=4039040 width=8) (actual time=51114.378..64464.215 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999889
                                                   Buffers: shared hit=842009 read=224466 written=11
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1666927.72 rows=60045272 width=8) (actual time=0.012..13380.710 rows=59985329 loops=1)
                                                         Buffers: shared hit=842009 read=224466 written=11
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1066.691..1066.691 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35239 read=39
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.048..534.892 rows=1500000 loops=1)
                                             Buffers: shared hit=35239 read=39
 Planning time: 4.404 ms
 Execution time: 97557.387 ms
(42 rows)

COMMIT;
COMMIT