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) > 313
	)
	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=10423354.01..10423356.76 rows=100 width=39) (actual time=145283.400..145283.743 rows=100 loops=1)
   Buffers: shared hit=1512773 read=932813 written=4
   ->  GroupAggregate  (cost=10423354.01..11257220.34 rows=30322412 width=39) (actual time=145283.395..145283.724 rows=100 loops=1)
         Buffers: shared hit=1512773 read=932813 written=4
         ->  Sort  (cost=10423354.01..10499160.04 rows=30322412 width=39) (actual time=145283.374..145283.425 rows=700 loops=1)
               Sort Key: orders.o_totalprice, orders.o_orderdate, customer.c_name, customer.c_custkey, orders.o_orderkey
               Sort Method: quicksort  Memory: 79kB
               Buffers: shared hit=1512773 read=932813 written=4
               ->  Hash Join  (cost=3081224.24..5826076.88 rows=30322412 width=39) (actual time=108249.434..145279.853 rows=700 loops=1)
                     Hash Cond: (public.lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1512759 read=932813 written=4
                     ->  Seq Scan on lineitem  (cost=0.00..1683568.23 rows=60644823 width=8) (actual time=0.052..23080.542 rows=60044872 loops=1)
                           Buffers: shared hit=667123 read=409997
                     ->  Hash  (cost=2986443.34..2986443.34 rows=7582472 width=39) (actual time=108223.250..108223.250 rows=100 loops=1)
                           Buckets: 1048576  Batches: 1  Memory Usage: 8kB
                           Buffers: shared hit=845636 read=522816 written=4
                           ->  Hash Join  (cost=2197149.05..2986443.34 rows=7582472 width=39) (actual time=97368.989..108222.730 rows=100 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=845636 read=522816 written=4
                                 ->  Hash Join  (cost=2128121.05..2765765.90 rows=7582472 width=20) (actual time=95618.426..106469.784 rows=100 loops=1)
                                       Hash Cond: (orders.o_orderkey = public.lineitem.l_orderkey)
                                       Buffers: shared hit=811617 read=521557 written=4
                                       ->  Seq Scan on orders  (cost=0.00..407703.43 rows=15164943 width=16) (actual time=0.022..5247.955 rows=15015000 loops=1)
                                             Buffers: shared hit=255623 read=431
                                       ->  Hash  (cost=2077646.51..2077646.51 rows=4037963 width=4) (actual time=95478.630..95478.630 rows=100 loops=1)
                                             Buckets: 524288  Batches: 1  Memory Usage: 4kB
                                             Buffers: shared hit=555994 read=521126 written=4
                                             ->  HashAggregate  (cost=1986792.35..2037266.88 rows=4037963 width=8) (actual time=86232.348..95478.084 rows=100 loops=1)
                                                   Filter: (sum(public.lineitem.l_quantity) > 313::double precision)
                                                   Rows Removed by Filter: 15014900
                                                   Buffers: shared hit=555994 read=521126 written=4
                                                   ->  Seq Scan on lineitem  (cost=0.00..1683568.23 rows=60644823 width=8) (actual time=0.019..33005.722 rows=60044872 loops=1)
                                                         Buffers: shared hit=555994 read=521126 written=4
                                 ->  Hash  (cost=50278.00..50278.00 rows=1500000 width=23) (actual time=1748.606..1748.606 rows=1500000 loops=1)
                                       Buckets: 262144  Batches: 1  Memory Usage: 82032kB
                                       Buffers: shared hit=34019 read=1259
                                       ->  Seq Scan on customer  (cost=0.00..50278.00 rows=1500000 width=23) (actual time=0.024..1061.060 rows=1500000 loops=1)
                                             Buffers: shared hit=34019 read=1259
 Total runtime: 145492.986 ms
(39 rows)

COMMIT;
COMMIT