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#41'
	and p_container = 'MED DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=398483.97..398483.99 rows=1 width=4) (actual time=1517.784..1517.785 rows=1 loops=1)
   Buffers: shared hit=47123 read=36763 dirtied=306 written=1308
   ->  Nested Loop  (cost=140.78..398433.89 rows=20033 width=4) (actual time=1.630..1515.962 rows=5368 loops=1)
         Buffers: shared hit=47123 read=36763 dirtied=306 written=1308
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7837.86 rows=1984 width=4) (actual time=0.429..58.830 rows=1985 loops=1)
               Index Cond: ((p_container = 'MED DRUM'::bpchar) AND (p_brand = 'Brand#41'::bpchar))
               Heap Fetches: 1985
               Buffers: shared hit=14 read=1944 written=89
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.014..0.018 rows=3 loops=1985)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13359
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.709..0.710 rows=1 loops=1985)
                       Buffers: shared hit=33750 read=34819 dirtied=306 written=1219
                       ->  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=0.069..0.692 rows=30 loops=1985)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60316
                             Buffers: shared hit=33750 read=34819 dirtied=306 written=1219
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.709..0.710 rows=1 loops=1985)
                       Buffers: shared hit=33750 read=34819 dirtied=306 written=1219
                       ->  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=0.069..0.692 rows=30 loops=1985)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60316
                             Buffers: shared hit=33750 read=34819 dirtied=306 written=1219
 Total runtime: 1518.081 ms
(26 rows)

COMMIT;
COMMIT