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 = 'WRAP JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=347921.49..347921.50 rows=1 width=4) (actual time=1019.482..1019.482 rows=1 loops=1)
   Buffers: shared hit=46218 read=36497 dirtied=258 written=52
   ->  Nested Loop  (cost=130.19..347872.11 rows=19751 width=4) (actual time=1.145..1018.089 rows=5320 loops=1)
         Buffers: shared hit=46218 read=36497 dirtied=258 written=52
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7732.28 rows=1958 width=4) (actual time=0.200..40.789 rows=1967 loops=1)
               Index Cond: ((p_container = 'WRAP JAR'::bpchar) AND (p_brand = 'Brand#13'::bpchar))
               Heap Fetches: 1967
               Buffers: shared hit=218 read=1715 written=2
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.008..0.011 rows=3 loops=1967)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13228
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.480..0.480 rows=1 loops=1967)
                       Buffers: shared hit=32772 read=34782 dirtied=258 written=50
                       ->  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=0.049..0.466 rows=30 loops=1967)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59415
                             Buffers: shared hit=32772 read=34782 dirtied=258 written=50
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.480..0.480 rows=1 loops=1967)
                       Buffers: shared hit=32772 read=34782 dirtied=258 written=50
                       ->  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=0.049..0.466 rows=30 loops=1967)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59415
                             Buffers: shared hit=32772 read=34782 dirtied=258 written=50
 Planning time: 4.530 ms
 Execution time: 1019.726 ms
(27 rows)

COMMIT;
COMMIT