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 = 'MED JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=358200.92..358200.93 rows=1 width=4) (actual time=1101.344..1101.344 rows=1 loops=1)
   Buffers: shared hit=56504 read=29894 dirtied=47
   ->  Nested Loop  (cost=130.19..358150.38 rows=20216 width=4) (actual time=1.567..1099.833 rows=5507 loops=1)
         Buffers: shared hit=56504 read=29894 dirtied=47
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7961.34 rows=2016 width=4) (actual time=0.231..49.711 rows=2062 loops=1)
               Index Cond: ((p_container = 'MED JAR'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 2062
               Buffers: shared hit=188 read=1838
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.60 rows=10 width=12) (actual time=0.009..0.011 rows=3 loops=2062)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13797
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.492..0.493 rows=1 loops=2062)
                       Buffers: shared hit=42519 read=28056 dirtied=47
                       ->  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=0.054..0.476 rows=30 loops=2062)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62014
                             Buffers: shared hit=42519 read=28056 dirtied=47
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.492..0.493 rows=1 loops=2062)
                       Buffers: shared hit=42519 read=28056 dirtied=47
                       ->  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=0.054..0.476 rows=30 loops=2062)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62014
                             Buffers: shared hit=42519 read=28056 dirtied=47
 Planning time: 5.718 ms
 Execution time: 1101.641 ms
(27 rows)

COMMIT;
COMMIT