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=10217159.84..10217162.59 rows=100 width=39) (actual time=84862.667..84863.108 rows=100 loops=1)
   Buffers: shared hit=1444825 read=991646 written=2811
   ->  GroupAggregate  (cost=10217159.84..11047890.90 rows=30208402 width=39) (actual time=84862.664..84863.090 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1444825 read=991646 written=2811
         ->  Sort  (cost=10217159.84..10292680.85 rows=30208402 width=39) (actual time=84862.648..84862.706 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=1444825 read=991646 written=2811
               ->  Hash Join  (cost=2903454.40..5637986.53 rows=30208402 width=39) (actual time=63964.418..84860.972 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1444813 read=991646 written=2811
                     ->  Seq Scan on lineitem  (cost=0.00..1677238.05 rows=60416805 width=8) (actual time=0.025..12201.014 rows=59984909 loops=1)
                           Buffers: shared hit=637367 read=435703
                     ->  Hash  (cost=2809048.47..2809048.47 rows=7552474 width=39) (actual time=63744.961..63744.961 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=807446 read=555943 written=2811
                           ->  Hash Join  (cost=2191987.94..2809048.47 rows=7552474 width=39) (actual time=53624.207..63744.558 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=807446 read=555943 written=2811
                                 ->  Hash Join  (cost=2122959.94..2626733.36 rows=7552474 width=20) (actual time=52600.968..62720.874 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=772171 read=555940 written=2810
                                       ->  Seq Scan on orders  (cost=0.00..406090.48 rows=15104948 width=16) (actual time=0.010..4199.473 rows=15000000 loops=1)
                                             Buffers: shared hit=149120 read=105921 written=2808
                                       ->  Hash  (cost=2071660.70..2071660.70 rows=4103939 width=4) (actual time=52354.838..52354.838 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=623051 read=450019 written=2
                                             ->  HashAggregate  (cost=1979322.07..2030621.31 rows=4103939 width=8) (actual time=45186.487..52354.417 rows=111 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 312::double precision)
                                                   Rows Removed by Filter: 14999889
                                                   Buffers: shared hit=623051 read=450019 written=2
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1677238.05 rows=60416805 width=8) (actual time=0.010..14319.678 rows=59984909 loops=1)
                                                         Buffers: shared hit=623051 read=450019 written=2
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1011.188..1011.188 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35275 read=3 written=1
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.018..527.568 rows=1500000 loops=1)
                                             Buffers: shared hit=35275 read=3 written=1
 Planning time: 4.278 ms
 Execution time: 85071.970 ms
(42 rows)

COMMIT;
COMMIT