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 = 'SM DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=358553.40..358553.41 rows=1 width=4) (actual time=654.306..654.306 rows=1 loops=1)
   Buffers: shared hit=57045 read=24398 dirtied=45
   ->  Nested Loop  (cost=130.19..358502.81 rows=20236 width=4) (actual time=0.688..653.376 rows=5274 loops=1)
         Buffers: shared hit=57045 read=24398 dirtied=45
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7965.95 rows=2018 width=4) (actual time=0.113..29.093 rows=1935 loops=1)
               Index Cond: ((p_container = 'SM DRUM'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 1935
               Buffers: shared hit=382 read=1520
         ->  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=1935)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13065
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.313..0.313 rows=1 loops=1935)
                       Buffers: shared hit=43598 read=22878 dirtied=45
                       ->  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..0.305 rows=30 loops=1935)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58438
                             Buffers: shared hit=43598 read=22878 dirtied=45
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.313..0.313 rows=1 loops=1935)
                       Buffers: shared hit=43598 read=22878 dirtied=45
                       ->  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..0.305 rows=30 loops=1935)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58438
                             Buffers: shared hit=43598 read=22878 dirtied=45
 Planning time: 3.509 ms
 Execution time: 654.493 ms
(27 rows)

COMMIT;
COMMIT