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#45'
	and p_container = 'LG JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=407902.00..407902.01 rows=1 width=4) (actual time=4240.018..4240.018 rows=1 loops=1)
   Buffers: shared hit=47511 read=39172 dirtied=49
   ->  Nested Loop  (cost=140.78..407850.98 rows=20406 width=4) (actual time=1.420..4236.554 rows=5462 loops=1)
         Buffers: shared hit=47511 read=39172 dirtied=49
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..8019.10 rows=2031 width=4) (actual time=0.321..160.935 rows=2070 loops=1)
               Index Cond: ((p_container = 'LG JAR'::bpchar) AND (p_brand = 'Brand#45'::bpchar))
               Heap Fetches: 2070
               Buffers: shared hit=91 read=1951
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.76 rows=10 width=12) (actual time=0.082..0.113 rows=3 loops=2070)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13812
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.844..1.844 rows=1 loops=2070)
                       Buffers: shared hit=33608 read=37221 dirtied=49
                       ->  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=0.181..1.821 rows=30 loops=2070)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62237
                             Buffers: shared hit=33608 read=37221 dirtied=49
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.844..1.844 rows=1 loops=2070)
                       Buffers: shared hit=33608 read=37221 dirtied=49
                       ->  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=0.181..1.821 rows=30 loops=2070)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62237
                             Buffers: shared hit=33608 read=37221 dirtied=49
 Total runtime: 4240.333 ms
(26 rows)

COMMIT;
COMMIT