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#13'
	and p_container = 'LG CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=352528.61..352528.62 rows=1 width=4) (actual time=794.401..794.401 rows=1 loops=1)
   Buffers: shared hit=56842 read=26135 dirtied=69
   ->  Nested Loop  (cost=130.19..352478.92 rows=19875 width=4) (actual time=0.734..793.316 rows=5352 loops=1)
         Buffers: shared hit=56842 read=26135 dirtied=69
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7836.76 rows=1984 width=4) (actual time=0.106..37.684 rows=1978 loops=1)
               Index Cond: ((p_container = 'LG CASE'::bpchar) AND (p_brand = 'Brand#13'::bpchar))
               Heap Fetches: 1978
               Buffers: shared hit=1 read=1948
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.006..0.008 rows=3 loops=1978)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13297
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.370..0.370 rows=1 loops=1978)
                       Buffers: shared hit=43544 read=24187 dirtied=69
                       ->  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=0.043..0.359 rows=30 loops=1978)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59506
                             Buffers: shared hit=43544 read=24187 dirtied=69
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.370..0.370 rows=1 loops=1978)
                       Buffers: shared hit=43544 read=24187 dirtied=69
                       ->  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=0.043..0.359 rows=30 loops=1978)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59506
                             Buffers: shared hit=43544 read=24187 dirtied=69
 Planning time: 3.548 ms
 Execution time: 794.599 ms
(27 rows)

COMMIT;
COMMIT