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=10182043.94..10182046.69 rows=100 width=39) (actual time=103718.923..103719.157 rows=75 loops=1)
   Buffers: shared hit=1510724 read=918179 written=65
   ->  GroupAggregate  (cost=10182043.94..11010136.78 rows=30112467 width=39) (actual time=103718.920..103719.144 rows=75 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1510724 read=918179 written=65
         ->  Sort  (cost=10182043.94..10257325.11 rows=30112467 width=39) (actual time=103718.896..103718.918 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=1510724 read=918179 written=65
               ->  Hash Join  (cost=2892254.05..5618105.73 rows=30112467 width=39) (actual time=80122.831..103717.710 rows=525 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1510712 read=918179 written=65
                     ->  Seq Scan on lineitem  (cost=0.00..1671915.34 rows=60224934 width=8) (actual time=0.026..12185.785 rows=60045303 loops=1)
                           Buffers: shared hit=701915 read=367751 written=5
                     ->  Hash  (cost=2798129.45..2798129.45 rows=7529968 width=39) (actual time=77591.679..77591.679 rows=75 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65542kB
                           Buffers: shared hit=808797 read=550428 written=60
                           ->  Hash Join  (cost=2183434.41..2798129.45 rows=7529968 width=39) (actual time=68347.302..77586.897 rows=75 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=808797 read=550428 written=60
                                 ->  Hash Join  (cost=2114406.41..2616151.93 rows=7529968 width=20) (actual time=67332.419..76566.210 rows=75 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=773519 read=550428 written=60
                                       ->  Seq Scan on orders  (cost=0.00..404880.36 rows=15059936 width=16) (actual time=0.010..3466.663 rows=15015000 loops=1)
                                             Buffers: shared hit=205177 read=49104 written=52
                                       ->  Hash  (cost=2063918.41..2063918.41 rows=4039040 width=4) (actual time=67124.985..67124.985 rows=75 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32771kB
                                             Buffers: shared hit=568342 read=501324 written=8
                                             ->  HashAggregate  (cost=1973040.01..2023528.01 rows=4039040 width=8) (actual time=57404.672..67121.584 rows=75 loops=1)
                                                   Group Key: lineitem_1.l_orderkey
                                                   Filter: (sum(lineitem_1.l_quantity) > 315::double precision)
                                                   Rows Removed by Filter: 15014925
                                                   Buffers: shared hit=568342 read=501324 written=8
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1671915.34 rows=60224934 width=8) (actual time=0.028..13586.849 rows=60045303 loops=1)
                                                         Buffers: shared hit=568342 read=501324 written=8
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=999.940..999.940 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35278
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.038..528.349 rows=1500000 loops=1)
                                             Buffers: shared hit=35278
 Planning time: 4.474 ms
 Execution time: 103993.296 ms
(42 rows)

COMMIT;
COMMIT