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#51'
	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=350929.36..350929.37 rows=1 width=4) (actual time=505.176..505.176 rows=1 loops=1)
   Buffers: shared hit=73338 read=10278
   ->  Nested Loop  (cost=130.19..350879.95 rows=19765 width=4) (actual time=0.902..504.223 rows=5474 loops=1)
         Buffers: shared hit=73338 read=10278
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7800.59 rows=1975 width=4) (actual time=0.185..27.972 rows=1995 loops=1)
               Index Cond: ((p_container = 'LG CASE'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1995
               Buffers: shared hit=12 read=1944
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.004..0.005 rows=3 loops=1995)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13485
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.230..0.230 rows=1 loops=1995)
                       Buffers: shared hit=59841 read=8334
                       ->  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=0.027..0.224 rows=30 loops=1995)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59910
                             Buffers: shared hit=59841 read=8334
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.230..0.230 rows=1 loops=1995)
                       Buffers: shared hit=59841 read=8334
                       ->  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=0.027..0.224 rows=30 loops=1995)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59910
                             Buffers: shared hit=59841 read=8334
 Planning time: 4.895 ms
 Execution time: 505.448 ms
(27 rows)

COMMIT;
COMMIT