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#11'
	and p_container = 'SM CAN'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=345795.89..345795.90 rows=1 width=4) (actual time=890.820..890.821 rows=1 loops=1)
   Buffers: shared hit=52690 read=32162 dirtied=238 written=74
   ->  Nested Loop  (cost=130.19..345746.81 rows=19630 width=4) (actual time=1.102..889.761 rows=5411 loops=1)
         Buffers: shared hit=52690 read=32162 dirtied=238 written=74
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7688.06 rows=1946 width=4) (actual time=0.210..38.999 rows=2015 loops=1)
               Index Cond: ((p_container = 'SM CAN'::bpchar) AND (p_brand = 'Brand#11'::bpchar))
               Heap Fetches: 2015
               Buffers: shared hit=52 read=1923 written=4
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.006..0.007 rows=3 loops=2015)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13524
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.411..0.411 rows=1 loops=2015)
                       Buffers: shared hit=39114 read=30239 dirtied=238 written=70
                       ->  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=0.043..0.401 rows=30 loops=2015)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60987
                             Buffers: shared hit=39114 read=30239 dirtied=238 written=70
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.411..0.411 rows=1 loops=2015)
                       Buffers: shared hit=39114 read=30239 dirtied=238 written=70
                       ->  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=0.043..0.401 rows=30 loops=2015)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60987
                             Buffers: shared hit=39114 read=30239 dirtied=238 written=70
 Planning time: 3.740 ms
 Execution time: 891.029 ms
(27 rows)

COMMIT;
COMMIT