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#12'
	and p_container = 'SM CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=365104.04..365104.05 rows=1 width=4) (actual time=775.858..775.858 rows=1 loops=1)
   Buffers: shared hit=57560 read=25513 dirtied=62 written=719
   ->  Nested Loop  (cost=130.19..365052.60 rows=20575 width=4) (actual time=1.245..774.874 rows=5336 loops=1)
         Buffers: shared hit=57560 read=25513 dirtied=62 written=719
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..8110.06 rows=2055 width=4) (actual time=0.256..23.068 rows=1983 loops=1)
               Index Cond: ((p_container = 'SM CASE'::bpchar) AND (p_brand = 'Brand#12'::bpchar))
               Heap Fetches: 1983
               Buffers: shared hit=1337 read=617 written=11
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.59 rows=10 width=12) (actual time=0.006..0.008 rows=3 loops=1983)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13299
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.367..0.367 rows=1 loops=1983)
                       Buffers: shared hit=42924 read=24896 dirtied=62 written=708
                       ->  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=0.039..0.357 rows=30 loops=1983)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59601
                             Buffers: shared hit=42924 read=24896 dirtied=62 written=708
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.367..0.367 rows=1 loops=1983)
                       Buffers: shared hit=42924 read=24896 dirtied=62 written=708
                       ->  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=0.039..0.357 rows=30 loops=1983)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59601
                             Buffers: shared hit=42924 read=24896 dirtied=62 written=708
 Planning time: 9.313 ms
 Execution time: 776.132 ms
(27 rows)

COMMIT;
COMMIT