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#34'
	and p_container = 'SM PACK'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=401282.92..401282.93 rows=1 width=4) (actual time=1295.347..1295.347 rows=1 loops=1)
   Buffers: shared hit=60379 read=22882 dirtied=66
   ->  Nested Loop  (cost=140.78..401232.83 rows=20035 width=4) (actual time=3.529..1293.630 rows=5376 loops=1)
         Buffers: shared hit=60379 read=22882 dirtied=66
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7890.19 rows=1998 width=4) (actual time=0.505..65.305 rows=1976 loops=1)
               Index Cond: ((p_container = 'SM PACK'::bpchar) AND (p_brand = 'Brand#34'::bpchar))
               Heap Fetches: 1976
               Buffers: shared hit=173 read=1766
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.016..0.022 rows=3 loops=1976)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13326
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.593..0.593 rows=1 loops=1976)
                       Buffers: shared hit=46880 read=21116 dirtied=66
                       ->  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=0.065..0.576 rows=30 loops=1976)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59799
                             Buffers: shared hit=46880 read=21116 dirtied=66
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.593..0.593 rows=1 loops=1976)
                       Buffers: shared hit=46880 read=21116 dirtied=66
                       ->  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=0.065..0.576 rows=30 loops=1976)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59799
                             Buffers: shared hit=46880 read=21116 dirtied=66
 Total runtime: 1295.736 ms
(26 rows)

COMMIT;
COMMIT