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 = 'SM CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=358731.81..358731.83 rows=1 width=4) (actual time=764.561..764.561 rows=1 loops=1)
   Buffers: shared hit=51181 read=31415 dirtied=43
   ->  Nested Loop  (cost=130.19..358681.20 rows=20246 width=4) (actual time=0.548..763.528 rows=5259 loops=1)
         Buffers: shared hit=51181 read=31415 dirtied=43
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7969.50 rows=2019 width=4) (actual time=0.128..34.778 rows=1979 loops=1)
               Index Cond: ((p_container = 'SM CASE'::bpchar) AND (p_brand = 'Brand#15'::bpchar))
               Heap Fetches: 1979
               Buffers: shared read=1948
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.005..0.007 rows=3 loops=1979)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13222
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.358..0.358 rows=1 loops=1979)
                       Buffers: shared hit=37959 read=29467 dirtied=43
                       ->  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..0.349 rows=30 loops=1979)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59199
                             Buffers: shared hit=37959 read=29467 dirtied=43
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.358..0.358 rows=1 loops=1979)
                       Buffers: shared hit=37959 read=29467 dirtied=43
                       ->  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..0.349 rows=30 loops=1979)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59199
                             Buffers: shared hit=37959 read=29467 dirtied=43
 Planning time: 3.600 ms
 Execution time: 764.733 ms
(27 rows)

COMMIT;
COMMIT