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=10235898.83..10235901.58 rows=100 width=39) (actual time=100861.072..100861.321 rows=75 loops=1)
   Buffers: shared hit=1477528 read=964508 dirtied=496 written=498
   ->  GroupAggregate  (cost=10235898.83..11068590.53 rows=30279698 width=39) (actual time=100861.070..100861.306 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1477528 read=964508 dirtied=496 written=498
         ->  Sort  (cost=10235898.83..10311598.08 rows=30279698 width=39) (actual time=100861.052..100861.079 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=1477528 read=964508 dirtied=496 written=498
               ->  Hash Join  (cost=2904420.71..5645403.15 rows=30279698 width=39) (actual time=76339.773..100859.885 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1477516 read=964508 dirtied=496 written=498
                     ->  Seq Scan on lineitem  (cost=0.00..1681192.97 rows=60559397 width=8) (actual time=0.012..13494.661 rows=59983922 loops=1)
                           Buffers: shared hit=639833 read=435766
                     ->  Hash  (cost=2809827.11..2809827.11 rows=7567488 width=39) (actual time=76244.696..76244.696 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=837683 read=528742 dirtied=496 written=498
                           ->  Hash Join  (cost=2192740.23..2809827.11 rows=7567488 width=39) (actual time=66229.549..76243.965 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=837683 read=528742 dirtied=496 written=498
                                 ->  Hash Join  (cost=2123712.23..2627286.79 rows=7567488 width=20) (actual time=65200.899..75208.959 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=803114 read=528033 dirtied=496 written=471
                                       ->  Seq Scan on orders  (cost=0.00..406897.75 rows=15134975 width=16) (actual time=0.009..4025.145 rows=15000000 loops=1)
                                             Buffers: shared hit=191492 read=64056 written=68
                                       ->  Hash  (cost=2073811.42..2073811.42 rows=3992065 width=4) (actual time=65043.530..65043.530 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=611622 read=463977 dirtied=496 written=403
                                             ->  HashAggregate  (cost=1983989.95..2033890.77 rows=3992065 width=8) (actual time=54741.658..65042.560 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=611622 read=463977 dirtied=496 written=403
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1681192.97 rows=60559397 width=8) (actual time=0.008..14062.411 rows=59983922 loops=1)
                                                         Buffers: shared hit=611622 read=463977 dirtied=496 written=403
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1020.470..1020.470 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=34569 read=709 written=27
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.018..544.827 rows=1500000 loops=1)
                                             Buffers: shared hit=34569 read=709 written=27
 Planning time: 4.571 ms
 Execution time: 101173.160 ms
(42 rows)

COMMIT;
COMMIT