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 = 'MED JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=355363.39..355363.40 rows=1 width=4) (actual time=746.366..746.366 rows=1 loops=1)
   Buffers: shared hit=62060 read=24487 dirtied=86 written=37
   ->  Nested Loop  (cost=130.19..355313.15 rows=20095 width=4) (actual time=1.083..745.471 rows=5515 loops=1)
         Buffers: shared hit=62060 read=24487 dirtied=86 written=37
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7897.94 rows=2000 width=4) (actual time=0.154..33.973 rows=2062 loops=1)
               Index Cond: ((p_container = 'MED JAR'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 2062
               Buffers: shared hit=295 read=1731 written=2
         ->  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=2062)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13810
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.335..0.335 rows=1 loops=2062)
                       Buffers: shared hit=47955 read=22756 dirtied=86 written=35
                       ->  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=0.038..0.327 rows=30 loops=2062)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62150
                             Buffers: shared hit=47955 read=22756 dirtied=86 written=35
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.335..0.335 rows=1 loops=2062)
                       Buffers: shared hit=47955 read=22756 dirtied=86 written=35
                       ->  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=0.038..0.327 rows=30 loops=2062)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62150
                             Buffers: shared hit=47955 read=22756 dirtied=86 written=35
 Planning time: 3.777 ms
 Execution time: 746.563 ms
(27 rows)

COMMIT;
COMMIT