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#52'
	and p_container = 'JUMBO CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=344557.10..344557.11 rows=1 width=4) (actual time=1002.577..1002.577 rows=1 loops=1)
   Buffers: shared hit=56360 read=28267 dirtied=184 written=36
   ->  Nested Loop  (cost=130.19..344508.06 rows=19618 width=4) (actual time=0.981..1001.197 rows=5222 loops=1)
         Buffers: shared hit=56360 read=28267 dirtied=184 written=36
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7659.93 rows=1939 width=4) (actual time=0.190..48.199 rows=2013 loops=1)
               Index Cond: ((p_container = 'JUMBO CASE'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 2013
               Buffers: shared hit=14 read=1967 written=3
         ->  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=2013)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13312
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.457..0.457 rows=1 loops=2013)
                       Buffers: shared hit=43034 read=26300 dirtied=184 written=33
                       ->  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=0.050..0.442 rows=30 loops=2013)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60965
                             Buffers: shared hit=43034 read=26300 dirtied=184 written=33
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.457..0.457 rows=1 loops=2013)
                       Buffers: shared hit=43034 read=26300 dirtied=184 written=33
                       ->  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=0.050..0.442 rows=30 loops=2013)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60965
                             Buffers: shared hit=43034 read=26300 dirtied=184 written=33
 Planning time: 4.916 ms
 Execution time: 1002.866 ms
(27 rows)

COMMIT;
COMMIT