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#55'
	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=353593.98..353594.00 rows=1 width=4) (actual time=692.818..692.818 rows=1 loops=1)
   Buffers: shared hit=54651 read=28820 dirtied=45 written=1314
   ->  Nested Loop  (cost=130.19..353544.07 rows=19967 width=4) (actual time=0.989..691.746 rows=5410 loops=1)
         Buffers: shared hit=54651 read=28820 dirtied=45 written=1314
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7861.76 rows=1990 width=4) (actual time=0.119..31.351 rows=1993 loops=1)
               Index Cond: ((p_container = 'SM CASE'::bpchar) AND (p_brand = 'Brand#55'::bpchar))
               Heap Fetches: 1993
               Buffers: shared hit=110 read=1838 written=87
         ->  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=1993)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13432
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.321..0.321 rows=1 loops=1993)
                       Buffers: shared hit=41109 read=26982 dirtied=45 written=1227
                       ->  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=0.033..0.313 rows=30 loops=1993)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59834
                             Buffers: shared hit=41109 read=26982 dirtied=45 written=1227
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.321..0.321 rows=1 loops=1993)
                       Buffers: shared hit=41109 read=26982 dirtied=45 written=1227
                       ->  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=0.033..0.313 rows=30 loops=1993)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59834
                             Buffers: shared hit=41109 read=26982 dirtied=45 written=1227
 Planning time: 3.010 ms
 Execution time: 692.991 ms
(27 rows)

COMMIT;
COMMIT