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#33'
	and p_container = 'WRAP BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=360862.15..360862.17 rows=1 width=4) (actual time=760.689..760.689 rows=1 loops=1)
   Buffers: shared hit=56652 read=28503 dirtied=97 written=44
   ->  Nested Loop  (cost=130.19..360811.14 rows=20407 width=4) (actual time=0.823..759.736 rows=5480 loops=1)
         Buffers: shared hit=56652 read=28503 dirtied=97 written=44
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..8018.51 rows=2031 width=4) (actual time=0.133..36.427 rows=2029 loops=1)
               Index Cond: ((p_container = 'WRAP BAG'::bpchar) AND (p_brand = 'Brand#33'::bpchar))
               Heap Fetches: 2029
               Buffers: shared read=1979 written=5
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.60 rows=10 width=12) (actual time=0.005..0.007 rows=3 loops=2029)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13635
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.346..0.346 rows=1 loops=2029)
                       Buffers: shared hit=43017 read=26524 dirtied=97 written=39
                       ->  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=0.039..0.337 rows=30 loops=2029)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61126
                             Buffers: shared hit=43017 read=26524 dirtied=97 written=39
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.346..0.346 rows=1 loops=2029)
                       Buffers: shared hit=43017 read=26524 dirtied=97 written=39
                       ->  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=0.039..0.337 rows=30 loops=2029)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61126
                             Buffers: shared hit=43017 read=26524 dirtied=97 written=39
 Planning time: 3.531 ms
 Execution time: 760.865 ms
(27 rows)

COMMIT;
COMMIT