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#25'
	and p_container = 'SM BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=347748.64..347748.66 rows=1 width=4) (actual time=716.660..716.660 rows=1 loops=1)
   Buffers: shared hit=51814 read=29793 dirtied=399 written=385
   ->  Nested Loop  (cost=130.19..347699.09 rows=19820 width=4) (actual time=0.889..715.702 rows=5243 loops=1)
         Buffers: shared hit=51814 read=29793 dirtied=399 written=385
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7729.12 rows=1957 width=4) (actual time=0.131..29.542 rows=1927 loops=1)
               Index Cond: ((p_container = 'SM BAG'::bpchar) AND (p_brand = 'Brand#25'::bpchar))
               Heap Fetches: 1927
               Buffers: shared hit=160 read=1721 written=20
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.005..0.006 rows=3 loops=1927)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12996
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.346..0.346 rows=1 loops=1927)
                       Buffers: shared hit=38658 read=28072 dirtied=399 written=365
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.036..0.337 rows=30 loops=1927)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58710
                             Buffers: shared hit=38658 read=28072 dirtied=399 written=365
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.346..0.346 rows=1 loops=1927)
                       Buffers: shared hit=38658 read=28072 dirtied=399 written=365
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.036..0.337 rows=30 loops=1927)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58710
                             Buffers: shared hit=38658 read=28072 dirtied=399 written=365
 Planning time: 3.167 ms
 Execution time: 716.844 ms
(27 rows)

COMMIT;
COMMIT