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=10188154.56..10188157.31 rows=100 width=39) (actual time=96551.917..96552.162 rows=75 loops=1)
   Buffers: shared hit=1477979 read=952768 written=2639
   ->  GroupAggregate  (cost=10188154.56..11016966.94 rows=30138632 width=39) (actual time=96551.914..96552.148 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1477979 read=952768 written=2639
         ->  Sort  (cost=10188154.56..10263501.14 rows=30138632 width=39) (actual time=96551.892..96551.933 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=1477979 read=952768 written=2639
               ->  Hash Join  (cost=2891847.11..5620059.84 rows=30138632 width=39) (actual time=72188.237..96550.587 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1477967 read=952768 written=2639
                     ->  Seq Scan on lineitem  (cost=0.00..1673360.63 rows=60277263 width=8) (actual time=0.041..12972.983 rows=59985781 loops=1)
                           Buffers: shared hit=629433 read=441155 written=1
                     ->  Hash  (cost=2797722.51..2797722.51 rows=7529968 width=39) (actual time=71869.283..71869.283 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=848534 read=511613 written=2638
                           ->  Hash Join  (cost=2183497.22..2797722.51 rows=7529968 width=39) (actual time=62470.030..71866.293 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=848534 read=511613 written=2638
                                 ->  Hash Join  (cost=2114469.22..2615744.99 rows=7529968 width=20) (actual time=61141.030..70533.810 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=848531 read=476338 written=15
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.011..3727.848 rows=15000000 loops=1)
                                             Buffers: shared hit=233544 read=20737 written=7
                                       ->  Hash  (cost=2064568.41..2064568.41 rows=3992065 width=4) (actual time=60958.922..60958.922 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=614987 read=455601 written=8
                                             ->  HashAggregate  (cost=1974746.94..2024647.76 rows=3992065 width=8) (actual time=52064.067..60957.948 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=614987 read=455601 written=8
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1673360.63 rows=60277263 width=8) (actual time=0.021..15597.002 rows=59985781 loops=1)
                                                         Buffers: shared hit=614987 read=455601 written=8
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1317.263..1317.263 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=3 read=35275 written=2623
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.021..841.766 rows=1500000 loops=1)
                                             Buffers: shared hit=3 read=35275 written=2623
 Planning time: 4.855 ms
 Execution time: 96829.889 ms
(42 rows)

COMMIT;
COMMIT