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#24'
	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=399284.26..399284.28 rows=1 width=4) (actual time=3408.418..3408.418 rows=1 loops=1)
   Buffers: shared hit=46448 read=32944 dirtied=109 written=1585
   ->  Nested Loop  (cost=140.78..399234.29 rows=19988 width=4) (actual time=2.921..3405.722 rows=5062 loops=1)
         Buffers: shared hit=46448 read=32944 dirtied=109 written=1585
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7853.12 rows=1988 width=4) (actual time=1.228..128.452 rows=1902 loops=1)
               Index Cond: ((p_container = 'SM JAR'::bpchar) AND (p_brand = 'Brand#24'::bpchar))
               Heap Fetches: 1902
               Buffers: shared hit=189 read=1686 written=80
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.071..0.094 rows=3 loops=1902)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12720
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.620..1.620 rows=1 loops=1902)
                       Buffers: shared hit=33539 read=31258 dirtied=109 written=1505
                       ->  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=0.158..1.598 rows=30 loops=1902)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 56897
                             Buffers: shared hit=33539 read=31258 dirtied=109 written=1505
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.620..1.620 rows=1 loops=1902)
                       Buffers: shared hit=33539 read=31258 dirtied=109 written=1505
                       ->  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=0.158..1.598 rows=30 loops=1902)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 56897
                             Buffers: shared hit=33539 read=31258 dirtied=109 written=1505
 Total runtime: 3408.805 ms
(26 rows)

COMMIT;
COMMIT