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#43'
	and p_container = 'WRAP PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=398077.47..398077.48 rows=1 width=4) (actual time=730.990..730.990 rows=1 loops=1)
   Buffers: shared hit=72864 read=14172 dirtied=100
   ->  Nested Loop  (cost=140.78..398027.83 rows=19855 width=4) (actual time=2.266..729.593 rows=5539 loops=1)
         Buffers: shared hit=72864 read=14172 dirtied=100
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7829.15 rows=1982 width=4) (actual time=1.380..30.949 rows=2084 loops=1)
               Index Cond: ((p_container = 'WRAP PKG'::bpchar) AND (p_brand = 'Brand#43'::bpchar))
               Heap Fetches: 2084
               Buffers: shared hit=773 read=1280
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.007..0.009 rows=3 loops=2084)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13913
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.321..0.321 rows=1 loops=2084)
                       Buffers: shared hit=58178 read=12892 dirtied=100
                       ->  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=0.041..0.309 rows=30 loops=2084)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62413
                             Buffers: shared hit=58178 read=12892 dirtied=100
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.321..0.321 rows=1 loops=2084)
                       Buffers: shared hit=58178 read=12892 dirtied=100
                       ->  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=0.041..0.309 rows=30 loops=2084)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62413
                             Buffers: shared hit=58178 read=12892 dirtied=100
 Total runtime: 731.147 ms
(26 rows)

COMMIT;
COMMIT