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=10252774.00..10252776.75 rows=100 width=39) (actual time=81678.151..81678.461 rows=100 loops=1)
   Buffers: shared hit=1432970 read=1012614 written=32
   ->  GroupAggregate  (cost=10252774.00..11086637.42 rows=30322306 width=39) (actual time=81678.148..81678.444 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1432970 read=1012614 written=32
         ->  Sort  (cost=10252774.00..10328579.77 rows=30322306 width=39) (actual time=81678.129..81678.165 rows=700 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=1432970 read=1012614 written=32
               ->  Hash Join  (cost=2910663.94..5655510.81 rows=30322306 width=39) (actual time=59390.896..81676.573 rows=700 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1432958 read=1012614 written=32
                     ->  Seq Scan on lineitem  (cost=0.00..1683566.13 rows=60644613 width=8) (actual time=0.031..11595.802 rows=60044872 loops=1)
                           Buffers: shared hit=586356 read=490764 written=2
                     ->  Hash  (cost=2815883.04..2815883.04 rows=7582472 width=39) (actual time=58711.002..58711.002 rows=100 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=846602 read=521850 written=30
                           ->  Hash Join  (cost=2197183.59..2815883.04 rows=7582472 width=39) (actual time=51709.178..58710.606 rows=100 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=846602 read=521850 written=30
                                 ->  Hash Join  (cost=2128155.59..2633117.96 rows=7582472 width=20) (actual time=50366.115..57366.774 rows=100 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=811324 read=521850 written=30
                                       ->  Seq Scan on orders  (cost=0.00..407703.43 rows=15164943 width=16) (actual time=0.008..3763.764 rows=15015000 loops=1)
                                             Buffers: shared hit=149421 read=106633 written=23
                                       ->  Hash  (cost=2077667.59..2077667.59 rows=4039040 width=4) (actual time=50248.742..50248.742 rows=100 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=661903 read=415217 written=7
                                             ->  HashAggregate  (cost=1986789.19..2037277.19 rows=4039040 width=8) (actual time=44564.243..50248.116 rows=100 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014900
                                                   Buffers: shared hit=661903 read=415217 written=7
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1683566.13 rows=60644613 width=8) (actual time=0.021..13447.737 rows=60044872 loops=1)
                                                         Buffers: shared hit=661903 read=415217 written=7
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1036.383..1036.383 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.011..527.207 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 4.385 ms
 Execution time: 81904.987 ms
(42 rows)

COMMIT;
COMMIT