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#51'
	and p_container = 'JUMBO PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=348981.99..348982.01 rows=1 width=4) (actual time=856.039..856.039 rows=1 loops=1)
   Buffers: shared hit=56869 read=28388 dirtied=41
   ->  Nested Loop  (cost=130.19..348932.76 rows=19694 width=4) (actual time=1.056..855.017 rows=5348 loops=1)
         Buffers: shared hit=56869 read=28388 dirtied=41
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7756.39 rows=1964 width=4) (actual time=0.207..40.074 rows=2027 loops=1)
               Index Cond: ((p_container = 'JUMBO PKG'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 2027
               Buffers: shared hit=60 read=1926
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.006..0.008 rows=3 loops=2027)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13497
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.390..0.390 rows=1 loops=2027)
                       Buffers: shared hit=43312 read=26462 dirtied=41
                       ->  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=0.042..0.381 rows=30 loops=2027)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61384
                             Buffers: shared hit=43312 read=26462 dirtied=41
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.390..0.390 rows=1 loops=2027)
                       Buffers: shared hit=43312 read=26462 dirtied=41
                       ->  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=0.042..0.381 rows=30 loops=2027)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61384
                             Buffers: shared hit=43312 read=26462 dirtied=41
 Planning time: 3.956 ms
 Execution time: 856.277 ms
(27 rows)

COMMIT;
COMMIT