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#15'
	and p_container = 'JUMBO CAN'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=349342.60..349342.61 rows=1 width=4) (actual time=984.855..984.855 rows=1 loops=1)
   Buffers: shared hit=55897 read=28676 dirtied=239 written=72
   ->  Nested Loop  (cost=130.19..349292.97 rows=19851 width=4) (actual time=1.073..983.396 rows=5398 loops=1)
         Buffers: shared hit=55897 read=28676 dirtied=239 written=72
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7764.42 rows=1966 width=4) (actual time=0.186..43.287 rows=2006 loops=1)
               Index Cond: ((p_container = 'JUMBO CAN'::bpchar) AND (p_brand = 'Brand#15'::bpchar))
               Heap Fetches: 2006
               Buffers: shared hit=166 read=1802 written=2
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.008..0.010 rows=3 loops=2006)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13465
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.453..0.453 rows=1 loops=2006)
                       Buffers: shared hit=42266 read=26874 dirtied=239 written=70
                       ->  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=0.048..0.437 rows=30 loops=2006)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60828
                             Buffers: shared hit=42266 read=26874 dirtied=239 written=70
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.453..0.453 rows=1 loops=2006)
                       Buffers: shared hit=42266 read=26874 dirtied=239 written=70
                       ->  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=0.048..0.437 rows=30 loops=2006)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60828
                             Buffers: shared hit=42266 read=26874 dirtied=239 written=70
 Planning time: 5.120 ms
 Execution time: 985.100 ms
(27 rows)

COMMIT;
COMMIT