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 = 'JUMBO PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=395677.19..395677.20 rows=1 width=4) (actual time=2280.816..2280.817 rows=1 loops=1)
   Buffers: shared hit=45913 read=36879 dirtied=325
   ->  Nested Loop  (cost=140.78..395627.46 rows=19892 width=4) (actual time=0.960..2278.672 rows=5400 loops=1)
         Buffers: shared hit=45913 read=36879 dirtied=325
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7780.79 rows=1970 width=4) (actual time=0.258..34.543 rows=1954 loops=1)
               Index Cond: ((p_container = 'JUMBO PKG'::bpchar) AND (p_brand = 'Brand#25'::bpchar))
               Heap Fetches: 1954
               Buffers: shared hit=1798 read=126
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.78 rows=10 width=12) (actual time=0.044..0.059 rows=3 loops=1954)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13257
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.082..1.082 rows=1 loops=1954)
                       Buffers: shared hit=30858 read=36753 dirtied=325
                       ->  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=0.104..1.064 rows=30 loops=1954)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59496
                             Buffers: shared hit=30858 read=36753 dirtied=325
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.082..1.082 rows=1 loops=1954)
                       Buffers: shared hit=30858 read=36753 dirtied=325
                       ->  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=0.104..1.064 rows=30 loops=1954)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59496
                             Buffers: shared hit=30858 read=36753 dirtied=325
 Total runtime: 2281.020 ms
(26 rows)

COMMIT;
COMMIT