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#32'
	and p_container = 'JUMBO BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=350226.07..350226.09 rows=1 width=4) (actual time=811.564..811.564 rows=1 loops=1)
   Buffers: shared hit=51872 read=32985 dirtied=75 written=120
   ->  Nested Loop  (cost=130.19..350176.61 rows=19784 width=4) (actual time=1.032..810.608 rows=5408 loops=1)
         Buffers: shared hit=51872 read=32985 dirtied=75 written=120
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7785.39 rows=1971 width=4) (actual time=0.159..36.151 rows=2006 loops=1)
               Index Cond: ((p_container = 'JUMBO BAG'::bpchar) AND (p_brand = 'Brand#32'::bpchar))
               Heap Fetches: 2006
               Buffers: shared hit=82 read=1891 written=8
         ->  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=2006)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13479
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.376..0.376 rows=1 loops=2006)
                       Buffers: shared hit=38311 read=31094 dirtied=75 written=112
                       ->  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..0.367 rows=30 loops=2006)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61059
                             Buffers: shared hit=38311 read=31094 dirtied=75 written=112
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.376..0.376 rows=1 loops=2006)
                       Buffers: shared hit=38311 read=31094 dirtied=75 written=112
                       ->  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..0.367 rows=30 loops=2006)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61059
                             Buffers: shared hit=38311 read=31094 dirtied=75 written=112
 Planning time: 2.987 ms
 Execution time: 811.746 ms
(27 rows)

COMMIT;
COMMIT