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#52'
	and p_container = 'WRAP DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=352889.53..352889.54 rows=1 width=4) (actual time=648.874..648.874 rows=1 loops=1)
   Buffers: shared hit=56208 read=25545 dirtied=270
   ->  Nested Loop  (cost=130.19..352839.34 rows=20073 width=4) (actual time=0.803..648.010 rows=5128 loops=1)
         Buffers: shared hit=56208 read=25545 dirtied=270
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7845.35 rows=1986 width=4) (actual time=0.104..30.983 rows=1949 loops=1)
               Index Cond: ((p_container = 'WRAP DRUM'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 1949
               Buffers: shared hit=2 read=1921
         ->  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..0.006 rows=3 loops=1949)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12966
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.307..0.307 rows=1 loops=1949)
                       Buffers: shared hit=43240 read=23624 dirtied=270
                       ->  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=0.036..0.299 rows=30 loops=1949)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58747
                             Buffers: shared hit=43240 read=23624 dirtied=270
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.307..0.307 rows=1 loops=1949)
                       Buffers: shared hit=43240 read=23624 dirtied=270
                       ->  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=0.036..0.299 rows=30 loops=1949)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58747
                             Buffers: shared hit=43240 read=23624 dirtied=270
 Planning time: 3.388 ms
 Execution time: 649.027 ms
(27 rows)

COMMIT;
COMMIT