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#53'
	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=352889.82..352889.83 rows=1 width=4) (actual time=745.073..745.074 rows=1 loops=1)
   Buffers: shared hit=49970 read=34298 dirtied=239 written=26
   ->  Nested Loop  (cost=130.19..352839.63 rows=20074 width=4) (actual time=0.754..744.076 rows=5381 loops=1)
         Buffers: shared hit=49970 read=34298 dirtied=239 written=26
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7845.68 rows=1986 width=4) (actual time=0.122..22.506 rows=2008 loops=1)
               Index Cond: ((p_container = 'JUMBO CASE'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 2008
               Buffers: shared hit=1036 read=936
         ->  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=2008)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13459
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.349..0.349 rows=1 loops=2008)
                       Buffers: shared hit=35475 read=33362 dirtied=239 written=26
                       ->  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=0.037..0.340 rows=30 loops=2008)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60495
                             Buffers: shared hit=35475 read=33362 dirtied=239 written=26
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.349..0.349 rows=1 loops=2008)
                       Buffers: shared hit=35475 read=33362 dirtied=239 written=26
                       ->  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=0.037..0.340 rows=30 loops=2008)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60495
                             Buffers: shared hit=35475 read=33362 dirtied=239 written=26
 Planning time: 3.055 ms
 Execution time: 745.279 ms
(27 rows)

COMMIT;
COMMIT