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#14'
	and p_container = 'WRAP CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=353594.04..353594.05 rows=1 width=4) (actual time=695.252..695.252 rows=1 loops=1)
   Buffers: shared hit=58813 read=27285 dirtied=116
   ->  Nested Loop  (cost=130.19..353544.05 rows=19995 width=4) (actual time=0.553..694.305 rows=5411 loops=1)
         Buffers: shared hit=58813 read=27285 dirtied=116
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7860.97 rows=1990 width=4) (actual time=0.144..33.562 rows=2056 loops=1)
               Index Cond: ((p_container = 'WRAP CASE'::bpchar) AND (p_brand = 'Brand#14'::bpchar))
               Heap Fetches: 2056
               Buffers: shared read=2025
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.005..0.007 rows=3 loops=2056)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13687
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.311..0.311 rows=1 loops=2056)
                       Buffers: shared hit=45126 read=25260 dirtied=116
                       ->  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=0.035..0.303 rows=30 loops=2056)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61850
                             Buffers: shared hit=45126 read=25260 dirtied=116
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.311..0.311 rows=1 loops=2056)
                       Buffers: shared hit=45126 read=25260 dirtied=116
                       ->  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=0.035..0.303 rows=30 loops=2056)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61850
                             Buffers: shared hit=45126 read=25260 dirtied=116
 Planning time: 3.235 ms
 Execution time: 695.448 ms
(27 rows)

COMMIT;
COMMIT