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#41'
	and p_container = 'JUMBO DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=347382.95..347382.96 rows=1 width=4) (actual time=651.988..651.988 rows=1 loops=1)
   Buffers: shared hit=61358 read=24386 dirtied=75 written=447
   ->  Nested Loop  (cost=130.19..347333.99 rows=19584 width=4) (actual time=0.661..651.008 rows=5520 loops=1)
         Buffers: shared hit=61358 read=24386 dirtied=75 written=447
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7720.78 rows=1955 width=4) (actual time=0.124..32.019 rows=2036 loops=1)
               Index Cond: ((p_container = 'JUMBO DRUM'::bpchar) AND (p_brand = 'Brand#41'::bpchar))
               Heap Fetches: 2036
               Buffers: shared read=1989 written=45
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.005..0.006 rows=3 loops=2036)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13698
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.295..0.295 rows=1 loops=2036)
                       Buffers: shared hit=47660 read=22397 dirtied=75 written=402
                       ->  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=0.036..0.287 rows=30 loops=2036)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61613
                             Buffers: shared hit=47660 read=22397 dirtied=75 written=402
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.295..0.295 rows=1 loops=2036)
                       Buffers: shared hit=47660 read=22397 dirtied=75 written=402
                       ->  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=0.036..0.287 rows=30 loops=2036)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61613
                             Buffers: shared hit=47660 read=22397 dirtied=75 written=402
 Planning time: 3.462 ms
 Execution time: 652.148 ms
(27 rows)

COMMIT;
COMMIT