BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	sum(l_extendedprice) / 7.0 as avg_yearly
from
	lineitem,
	part
where
	p_partkey = l_partkey
	and p_brand = 'Brand#53'
	and p_container = 'JUMBO BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=410506.76..410506.78 rows=1 width=4) (actual time=964.960..964.960 rows=1 loops=1)
   Buffers: shared hit=63661 read=20564 dirtied=595 written=7
   ->  Nested Loop  (cost=140.78..410454.96 rows=20721 width=4) (actual time=1.298..963.352 rows=5341 loops=1)
         Buffers: shared hit=63661 read=20564 dirtied=595 written=7
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..8066.65 rows=2044 width=4) (actual time=0.298..39.100 rows=1992 loops=1)
               Index Cond: ((p_container = 'JUMBO BAG'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 1992
               Buffers: shared hit=599 read=1363
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.76 rows=10 width=12) (actual time=0.009..0.012 rows=3 loops=1992)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13353
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.446..0.446 rows=1 loops=1992)
                       Buffers: shared hit=49709 read=19201 dirtied=595 written=7
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.050..0.431 rows=30 loops=1992)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60646
                             Buffers: shared hit=49709 read=19201 dirtied=595 written=7
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.446..0.446 rows=1 loops=1992)
                       Buffers: shared hit=49709 read=19201 dirtied=595 written=7
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.050..0.431 rows=30 loops=1992)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60646
                             Buffers: shared hit=49709 read=19201 dirtied=595 written=7
 Total runtime: 965.212 ms
(26 rows)

COMMIT;
COMMIT