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#23'
	and p_container = 'JUMBO BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=355185.67..355185.68 rows=1 width=4) (actual time=455.028..455.028 rows=1 loops=1)
   Buffers: shared hit=71048 read=9994
   ->  Nested Loop  (cost=130.19..355135.66 rows=20005 width=4) (actual time=0.590..454.164 rows=5310 loops=1)
         Buffers: shared hit=71048 read=9994
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7893.91 rows=1999 width=4) (actual time=0.119..25.934 rows=1937 loops=1)
               Index Cond: ((p_container = 'JUMBO BAG'::bpchar) AND (p_brand = 'Brand#23'::bpchar))
               Heap Fetches: 1937
               Buffers: shared hit=12 read=1893
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.004..0.005 rows=3 loops=1937)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13089
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.213..0.213 rows=1 loops=1937)
                       Buffers: shared hit=57947 read=8101
                       ->  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=0.027..0.206 rows=30 loops=1937)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 57998
                             Buffers: shared hit=57947 read=8101
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.213..0.213 rows=1 loops=1937)
                       Buffers: shared hit=57947 read=8101
                       ->  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=0.027..0.206 rows=30 loops=1937)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 57998
                             Buffers: shared hit=57947 read=8101
 Planning time: 4.980 ms
 Execution time: 455.206 ms
(27 rows)

COMMIT;
COMMIT