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=10349909.94..10349912.69 rows=100 width=39) (actual time=102099.556..102099.888 rows=100 loops=1)
   Buffers: shared hit=1410842 read=1018063 dirtied=25 written=8970
   ->  GroupAggregate  (cost=10349909.94..11178011.28 rows=30112776 width=39) (actual time=102099.553..102099.873 rows=100 loops=1)
         Buffers: shared hit=1410842 read=1018063 dirtied=25 written=8970
         ->  Sort  (cost=10349909.94..10425191.88 rows=30112776 width=39) (actual time=102099.534..102099.576 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=1410842 read=1018063 dirtied=25 written=8970
               ->  Hash Join  (cost=3060051.94..5785920.62 rows=30112776 width=39) (actual time=76355.859..102095.782 rows=777 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1410828 read=1018063 dirtied=25 written=8970
                     ->  Seq Scan on lineitem  (cost=0.00..1671921.52 rows=60225552 width=8) (actual time=0.076..13969.556 rows=60045303 loops=1)
                           Buffers: shared hit=652633 read=417033 written=3
                     ->  Hash  (cost=2965927.34..2965927.34 rows=7529968 width=39) (actual time=76222.725..76222.725 rows=111 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=758195 read=601030 dirtied=25 written=8967
                           ->  Hash Join  (cost=2182171.50..2965927.34 rows=7529968 width=39) (actual time=67666.301..76222.170 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=758195 read=601030 dirtied=25 written=8967
                                 ->  Hash Join  (cost=2113143.50..2746299.98 rows=7529968 width=20) (actual time=66052.871..74606.687 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=758193 read=565754 dirtied=25 written=578
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.010..3976.415 rows=15015000 loops=1)
                                             Buffers: shared hit=245800 read=8481 dirtied=25 written=564
                                       ->  Hash  (cost=2063109.85..2063109.85 rows=4002692 width=4) (actual time=65890.875..65890.875 rows=111 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=512393 read=557273 written=14
                                             ->  HashAggregate  (cost=1973049.28..2023082.93 rows=4002692 width=8) (actual time=57285.654..65889.964 rows=111 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 15014889
                                                   Buffers: shared hit=512393 read=557273 written=14
                                                   ->  Seq Scan on lineitem  (cost=0.00..1671921.52 rows=60225552 width=8) (actual time=0.020..15666.679 rows=60045303 loops=1)
                                                         Buffers: shared hit=512393 read=557273 written=14
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1611.629..1611.629 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=2 read=35276 written=8389
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.011..1018.636 rows=1500000 loops=1)
                                             Buffers: shared hit=2 read=35276 written=8389
 Total runtime: 102323.671 ms
(39 rows)

COMMIT;
COMMIT