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#25'
	and p_container = 'LG BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=351286.82..351286.83 rows=1 width=4) (actual time=708.006..708.006 rows=1 loops=1)
   Buffers: shared hit=51167 read=27657 dirtied=51 written=1287
   ->  Nested Loop  (cost=130.19..351237.27 rows=19821 width=4) (actual time=0.591..707.094 rows=5058 loops=1)
         Buffers: shared hit=51167 read=27657 dirtied=51 written=1287
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7809.50 rows=1977 width=4) (actual time=0.140..29.320 rows=1884 loops=1)
               Index Cond: ((p_container = 'LG BAG'::bpchar) AND (p_brand = 'Brand#25'::bpchar))
               Heap Fetches: 1884
               Buffers: shared hit=326 read=1539 written=70
         ->  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=1884)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12638
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.350..0.350 rows=1 loops=1884)
                       Buffers: shared hit=38203 read=26118 dirtied=51 written=1217
                       ->  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=0.035..0.341 rows=30 loops=1884)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 56491
                             Buffers: shared hit=38203 read=26118 dirtied=51 written=1217
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.350..0.350 rows=1 loops=1884)
                       Buffers: shared hit=38203 read=26118 dirtied=51 written=1217
                       ->  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=0.035..0.341 rows=30 loops=1884)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 56491
                             Buffers: shared hit=38203 read=26118 dirtied=51 written=1217
 Planning time: 3.381 ms
 Execution time: 708.186 ms
(27 rows)

COMMIT;
COMMIT