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#12'
	and p_container = 'JUMBO CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=347383.79..347383.80 rows=1 width=4) (actual time=570.833..570.833 rows=1 loops=1)
   Buffers: shared hit=54052 read=29523 dirtied=75 written=2060
   ->  Nested Loop  (cost=130.19..347334.83 rows=19584 width=4) (actual time=0.736..569.965 rows=5373 loops=1)
         Buffers: shared hit=54052 read=29523 dirtied=75 written=2060
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7720.89 rows=1955 width=4) (actual time=0.141..25.313 rows=1992 loops=1)
               Index Cond: ((p_container = 'JUMBO CASE'::bpchar) AND (p_brand = 'Brand#12'::bpchar))
               Heap Fetches: 1992
               Buffers: shared read=1955 written=138
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.004..0.006 rows=3 loops=1992)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13385
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.265..0.265 rows=1 loops=1992)
                       Buffers: shared hit=40667 read=27568 dirtied=75 written=1922
                       ->  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=0.028..0.256 rows=30 loops=1992)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59956
                             Buffers: shared hit=40667 read=27568 dirtied=75 written=1922
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.265..0.265 rows=1 loops=1992)
                       Buffers: shared hit=40667 read=27568 dirtied=75 written=1922
                       ->  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=0.028..0.256 rows=30 loops=1992)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59956
                             Buffers: shared hit=40667 read=27568 dirtied=75 written=1922
 Planning time: 2.227 ms
 Execution time: 571.006 ms
(27 rows)

COMMIT;
COMMIT