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#43'
	and p_container = 'JUMBO DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=395669.47..395669.48 rows=1 width=4) (actual time=812.259..812.259 rows=1 loops=1)
   Buffers: shared hit=74569 read=9856 dirtied=83 written=3
   ->  Nested Loop  (cost=140.78..395620.13 rows=19735 width=4) (actual time=2.644..810.736 rows=5350 loops=1)
         Buffers: shared hit=74569 read=9856 dirtied=83 written=3
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7781.59 rows=1970 width=4) (actual time=0.765..41.557 rows=2022 loops=1)
               Index Cond: ((p_container = 'JUMBO DRUM'::bpchar) AND (p_brand = 'Brand#43'::bpchar))
               Heap Fetches: 2022
               Buffers: shared hit=504 read=1477
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.009..0.013 rows=3 loops=2022)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13479
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.362..0.362 rows=1 loops=2022)
                       Buffers: shared hit=60586 read=8379 dirtied=83 written=3
                       ->  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=0.048..0.350 rows=30 loops=2022)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60554
                             Buffers: shared hit=60586 read=8379 dirtied=83 written=3
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.362..0.362 rows=1 loops=2022)
                       Buffers: shared hit=60586 read=8379 dirtied=83 written=3
                       ->  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=0.048..0.350 rows=30 loops=2022)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60554
                             Buffers: shared hit=60586 read=8379 dirtied=83 written=3
 Total runtime: 812.569 ms
(26 rows)

COMMIT;
COMMIT