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=10222394.49..10222397.24 rows=100 width=39) (actual time=93048.052..93048.364 rows=100 loops=1)
   Buffers: shared hit=1339672 read=1098749 written=51
   ->  GroupAggregate  (cost=10222394.49..11053779.05 rows=30232166 width=39) (actual time=93048.049..93048.349 rows=100 loops=1)
         Group Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
         Buffers: shared hit=1339672 read=1098749 written=51
         ->  Sort  (cost=10222394.49..10297974.90 rows=30232166 width=39) (actual time=93048.036..93048.078 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=1339672 read=1098749 written=51
               ->  Hash Join  (cost=2902762.55..5639449.70 rows=30232166 width=39) (actual time=72246.556..93046.419 rows=777 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1339660 read=1098749 written=51
                     ->  Seq Scan on lineitem  (cost=0.00..1678561.32 rows=60464332 width=8) (actual time=0.022..11196.925 rows=59984519 loops=1)
                           Buffers: shared hit=572023 read=501895
                     ->  Hash  (cost=2808262.60..2808262.60 rows=7559996 width=39) (actual time=71922.432..71922.432 rows=111 loops=1)
                           Buckets: 8388608  Batches: 1  Memory Usage: 65544kB
                           Buffers: shared hit=767637 read=596854 written=51
                           ->  Hash Join  (cost=2191277.38..2808262.60 rows=7559996 width=39) (actual time=62202.194..71921.847 rows=111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=767637 read=596854 written=51
                                 ->  Hash Join  (cost=2122249.38..2625834.66 rows=7559996 width=20) (actual time=61165.757..70878.853 rows=111 loops=1)
                                       Hash Cond: (orders.o_orderkey = lineitem_1.l_orderkey)
                                       Buffers: shared hit=732362 read=596851 written=51
                                       ->  Seq Scan on orders  (cost=0.00..406494.91 rows=15119991 width=16) (actual time=0.009..3931.834 rows=15000000 loops=1)
                                             Buffers: shared hit=136336 read=118959 written=43
                                       ->  Hash  (cost=2071761.38..2071761.38 rows=4039040 width=4) (actual time=60226.175..60226.175 rows=111 loops=1)
                                             Buckets: 4194304  Batches: 1  Memory Usage: 32772kB
                                             Buffers: shared hit=596026 read=477892 written=8
                                             ->  HashAggregate  (cost=1980882.98..2031370.98 rows=4039040 width=8) (actual time=48994.586..60225.492 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=596026 read=477892 written=8
                                                   ->  Seq Scan on lineitem lineitem_1  (cost=0.00..1678561.32 rows=60464332 width=8) (actual time=0.031..12523.307 rows=59984519 loops=1)
                                                         Buffers: shared hit=596026 read=477892 written=8
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1021.972..1021.972 rows=1500000 loops=1)
                                       Buckets: 2097152  Batches: 1  Memory Usage: 98416kB
                                       Buffers: shared hit=35275 read=3
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.021..529.754 rows=1500000 loops=1)
                                             Buffers: shared hit=35275 read=3
 Planning time: 3.832 ms
 Execution time: 93316.173 ms
(42 rows)

COMMIT;
COMMIT