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 BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=356075.91..356075.92 rows=1 width=4) (actual time=743.623..743.624 rows=1 loops=1)
   Buffers: shared hit=53459 read=29058 dirtied=90 written=3
   ->  Nested Loop  (cost=130.19..356025.57 rows=20135 width=4) (actual time=0.608..742.628 rows=5330 loops=1)
         Buffers: shared hit=53459 read=29058 dirtied=90 written=3
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7913.23 rows=2004 width=4) (actual time=0.148..34.322 rows=1961 loops=1)
               Index Cond: ((p_container = 'SM BAG'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 1961
               Buffers: shared hit=2 read=1938
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.006..0.007 rows=3 loops=1961)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13226
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.351..0.351 rows=1 loops=1961)
                       Buffers: shared hit=40231 read=27120 dirtied=90 written=3
                       ->  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..0.342 rows=30 loops=1961)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59206
                             Buffers: shared hit=40231 read=27120 dirtied=90 written=3
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.351..0.351 rows=1 loops=1961)
                       Buffers: shared hit=40231 read=27120 dirtied=90 written=3
                       ->  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..0.342 rows=30 loops=1961)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59206
                             Buffers: shared hit=40231 read=27120 dirtied=90 written=3
 Planning time: 2.838 ms
 Execution time: 743.802 ms
(27 rows)

COMMIT;
COMMIT