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#21'
	and p_container = 'SM JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=403889.98..403890.00 rows=1 width=4) (actual time=1497.954..1497.955 rows=1 loops=1)
   Buffers: shared hit=43177 read=40673 dirtied=120 written=5
   ->  Nested Loop  (cost=140.78..403839.47 rows=20206 width=4) (actual time=1.292..1496.218 rows=5467 loops=1)
         Buffers: shared hit=43177 read=40673 dirtied=120 written=5
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7941.54 rows=2011 width=4) (actual time=0.349..27.392 rows=1992 loops=1)
               Index Cond: ((p_container = 'SM JAR'::bpchar) AND (p_brand = 'Brand#21'::bpchar))
               Heap Fetches: 1992
               Buffers: shared hit=1805 read=145
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.021..0.029 rows=3 loops=1992)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13500
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.701..0.701 rows=1 loops=1992)
                       Buffers: shared hit=27872 read=40528 dirtied=120 written=5
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.067..0.684 rows=30 loops=1992)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60120
                             Buffers: shared hit=27872 read=40528 dirtied=120 written=5
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.701..0.701 rows=1 loops=1992)
                       Buffers: shared hit=27872 read=40528 dirtied=120 written=5
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.067..0.684 rows=30 loops=1992)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60120
                             Buffers: shared hit=27872 read=40528 dirtied=120 written=5
 Total runtime: 1498.149 ms
(26 rows)

COMMIT;
COMMIT