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#52'
	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=348804.40..348804.41 rows=1 width=4) (actual time=860.071..860.071 rows=1 loops=1)
   Buffers: shared hit=51621 read=33664 dirtied=43 written=69
   ->  Nested Loop  (cost=130.19..348755.14 rows=19704 width=4) (actual time=0.727..859.011 rows=5487 loops=1)
         Buffers: shared hit=51621 read=33664 dirtied=43 written=69
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7753.25 rows=1963 width=4) (actual time=0.175..35.639 rows=2038 loops=1)
               Index Cond: ((p_container = 'LG JAR'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 2038
               Buffers: shared hit=87 read=1920 written=3
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.006..0.007 rows=3 loops=2038)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13680
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.393..0.393 rows=1 loops=2038)
                       Buffers: shared hit=37854 read=31744 dirtied=43 written=66
                       ->  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=0.038..0.385 rows=30 loops=2038)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61131
                             Buffers: shared hit=37854 read=31744 dirtied=43 written=66
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.393..0.393 rows=1 loops=2038)
                       Buffers: shared hit=37854 read=31744 dirtied=43 written=66
                       ->  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=0.038..0.385 rows=30 loops=2038)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61131
                             Buffers: shared hit=37854 read=31744 dirtied=43 written=66
 Planning time: 3.174 ms
 Execution time: 860.265 ms
(27 rows)

COMMIT;
COMMIT