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#54'
	and p_container = 'JUMBO JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=351998.36..351998.37 rows=1 width=4) (actual time=1083.327..1083.327 rows=1 loops=1)
   Buffers: shared hit=58628 read=28836 dirtied=160 written=112
   ->  Nested Loop  (cost=130.19..351948.60 rows=19904 width=4) (actual time=1.070..1081.827 rows=5536 loops=1)
         Buffers: shared hit=58628 read=28836 dirtied=160 written=112
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7824.70 rows=1981 width=4) (actual time=0.225..66.925 rows=2074 loops=1)
               Index Cond: ((p_container = 'JUMBO JAR'::bpchar) AND (p_brand = 'Brand#54'::bpchar))
               Heap Fetches: 2074
               Buffers: shared read=2037 written=6
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.008..0.011 rows=3 loops=2074)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13869
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.473..0.473 rows=1 loops=2074)
                       Buffers: shared hit=44759 read=26799 dirtied=160 written=106
                       ->  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=0.047..0.458 rows=30 loops=2074)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62954
                             Buffers: shared hit=44759 read=26799 dirtied=160 written=106
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.473..0.473 rows=1 loops=2074)
                       Buffers: shared hit=44759 read=26799 dirtied=160 written=106
                       ->  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=0.047..0.458 rows=30 loops=2074)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62954
                             Buffers: shared hit=44759 read=26799 dirtied=160 written=106
 Planning time: 4.916 ms
 Execution time: 1083.589 ms
(27 rows)

COMMIT;
COMMIT