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#13'
	and p_container = 'JUMBO JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=352715.29..352715.30 rows=1 width=4) (actual time=805.530..805.530 rows=1 loops=1)
   Buffers: shared hit=46678 read=41367 dirtied=325 written=4
   ->  Nested Loop  (cost=130.19..352665.03 rows=20103 width=4) (actual time=0.684..804.653 rows=5532 loops=1)
         Buffers: shared hit=46678 read=41367 dirtied=325 written=4
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7840.77 rows=1985 width=4) (actual time=0.116..19.894 rows=2091 loops=1)
               Index Cond: ((p_container = 'JUMBO JAR'::bpchar) AND (p_brand = 'Brand#13'::bpchar))
               Heap Fetches: 2091
               Buffers: shared hit=1462 read=593
         ->  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=2091)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13951
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.366..0.366 rows=1 loops=2091)
                       Buffers: shared hit=31265 read=40774 dirtied=325 written=4
                       ->  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..0.357 rows=30 loops=2091)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 63365
                             Buffers: shared hit=31265 read=40774 dirtied=325 written=4
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.366..0.366 rows=1 loops=2091)
                       Buffers: shared hit=31265 read=40774 dirtied=325 written=4
                       ->  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..0.357 rows=30 loops=2091)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 63365
                             Buffers: shared hit=31265 read=40774 dirtied=325 written=4
 Planning time: 3.246 ms
 Execution time: 805.699 ms
(27 rows)

COMMIT;
COMMIT