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) > 315
	)
	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=10184828.20..10184830.95 rows=100 width=39) (actual time=87354.553..87354.792 rows=75 loops=1)
   Buffers: shared hit=1504094 read=924809 written=6
   ->  GroupAggregate  (cost=10184828.20..11012928.72 rows=30112746 width=39) (actual time=87354.550..87354.776 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1504094 read=924809 written=6
         ->  Sort  (cost=10184828.20..10260110.07 rows=30112746 width=39) (actual time=87354.533..87354.568 rows=525 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 66kB
               Buffers: shared hit=1504094 read=924809 written=6
               ->  Hash Join  (cost=2894979.29..5620846.32 rows=30112746 width=39) (actual time=64344.204..87353.443 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1504082 read=924809 written=6
                     ->  Seq Scan on lineitem  (cost=0.00..1671920.92 rows=60225492 width=8) (actual time=0.063..11734.973 rows=59985781 loops=1)
                           Buffers: shared hit=622865 read=446801 written=2
                     ->  Hash  (cost=2800854.69..2800854.69 rows=7529968 width=39) (actual time=64198.239..64198.239 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=881217 read=478008 written=4
                           ->  Hash Join  (cost=2185555.90..2800854.69 rows=7529968 width=39) (actual time=55623.278..64194.861 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=881217 read=478008 written=4
                                 ->  Hash Join  (cost=2116527.90..2618877.17 rows=7529968 width=20) (actual time=54565.291..63132.201 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=850971 read=472976 written=4
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.008..3053.709 rows=15000000 loops=1)
                                             Buffers: shared hit=254280 read=1
                                       ->  Hash  (cost=2065285.22..2065285.22 rows=4099415 width=4) (actual time=54009.710..54009.710 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=596691 read=472975 written=4
                                             ->  HashAggregate  (cost=1973048.38..2024291.07 rows=4099415 width=8) (actual time=44660.199..54007.905 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 14999925
                                                   Buffers: shared hit=596691 read=472975 written=4
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671920.92 rows=60225492 width=8) (actual time=0.012..13508.621 rows=59985781 loops=1)
                                                         Buffers: shared hit=596691 read=472975 written=4
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1040.837..1040.837 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=30246 read=5032
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.013..557.901 rows=1500000 loops=1)
                                             Buffers: shared hit=30246 read=5032
 Planning time: 4.914 ms
 Execution time: 87701.800 ms
(42 rows)

COMMIT;
COMMIT