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=10179982.26..10179985.01 rows=100 width=39) (actual time=85213.731..85214.046 rows=100 loops=1)
   Buffers: shared hit=1497682 read=931221 dirtied=636 written=641
   ->  GroupAggregate  (cost=10179982.26..11008080.85 rows=30112676 width=39) (actual time=85213.727..85214.028 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1497682 read=931221 dirtied=636 written=641
         ->  Sort  (cost=10179982.26..10255263.95 rows=30112676 width=39) (actual time=85213.710..85213.748 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=1497682 read=931221 dirtied=636 written=641
               ->  Hash Join  (cost=2890146.43..5616009.59 rows=30112676 width=39) (actual time=61968.762..85212.099 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1497670 read=931221 dirtied=636 written=641
                     ->  Seq Scan on lineitem  (cost=0.00..1671919.51 rows=60225351 width=8) (actual time=0.024..12884.731 rows=60045303 loops=1)
                           Buffers: shared hit=681346 read=388320
                     ->  Hash  (cost=2796021.83..2796021.83 rows=7529968 width=39) (actual time=61549.974..61549.974 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=816324 read=542901 dirtied=636 written=641
                           ->  Hash Join  (cost=2181796.54..2796021.83 rows=7529968 width=39) (actual time=55028.454..61549.665 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=816324 read=542901 dirtied=636 written=641
                                 ->  Hash Join  (cost=2112768.54..2614044.31 rows=7529968 width=20) (actual time=53814.018..60334.873 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=781047 read=542900 dirtied=636 written=641
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.010..3394.839 rows=15015000 loops=1)
                                             Buffers: shared hit=173921 read=80360 written=32
                                       ->  Hash  (cost=2062867.73..2062867.73 rows=3992065 width=4) (actual time=53645.490..53645.490 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=607126 read=462540 dirtied=636 written=609
                                             ->  HashAggregate  (cost=1973046.26..2022947.08 rows=3992065 width=8) (actual time=45320.013..53645.142 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=607126 read=462540 dirtied=636 written=609
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671919.51 rows=60225351 width=8) (actual time=0.010..12914.007 rows=60045303 loops=1)
                                                         Buffers: shared hit=607126 read=462540 dirtied=636 written=609
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1198.694..1198.694 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35277 read=1
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.019..566.001 rows=1500000 loops=1)
                                             Buffers: shared hit=35277 read=1
 Planning time: 4.518 ms
 Execution time: 85436.982 ms
(42 rows)

COMMIT;
COMMIT