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#51'
	and p_container = 'MED PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=355189.44..355189.46 rows=1 width=4) (actual time=698.462..698.463 rows=1 loops=1)
   Buffers: shared hit=60771 read=22904 dirtied=259 written=62
   ->  Nested Loop  (cost=130.19..355139.03 rows=20165 width=4) (actual time=0.813..697.529 rows=5283 loops=1)
         Buffers: shared hit=60771 read=22904 dirtied=259 written=62
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7893.14 rows=1999 width=4) (actual time=0.135..13.810 rows=1986 loops=1)
               Index Cond: ((p_container = 'MED PKG'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1986
               Buffers: shared hit=1945 read=15
         ->  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..0.006 rows=3 loops=1986)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13297
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.334..0.334 rows=1 loops=1986)
                       Buffers: shared hit=45529 read=22889 dirtied=259 written=62
                       ->  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=0.037..0.326 rows=30 loops=1986)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60139
                             Buffers: shared hit=45529 read=22889 dirtied=259 written=62
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.334..0.334 rows=1 loops=1986)
                       Buffers: shared hit=45529 read=22889 dirtied=259 written=62
                       ->  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=0.037..0.326 rows=30 loops=1986)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60139
                             Buffers: shared hit=45529 read=22889 dirtied=259 written=62
 Planning time: 3.295 ms
 Execution time: 698.633 ms
(27 rows)

COMMIT;
COMMIT