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 = 'JUMBO JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=356614.72..356614.74 rows=1 width=4) (actual time=693.247..693.247 rows=1 loops=1)
   Buffers: shared hit=59192 read=25286 dirtied=275 written=23
   ->  Nested Loop  (cost=130.19..356563.91 rows=20326 width=4) (actual time=1.364..692.260 rows=5471 loops=1)
         Buffers: shared hit=59192 read=25286 dirtied=275 written=23
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7926.08 rows=2007 width=4) (actual time=0.172..30.506 rows=2001 loops=1)
               Index Cond: ((p_container = 'JUMBO JAR'::bpchar) AND (p_brand = 'Brand#55'::bpchar))
               Heap Fetches: 2001
               Buffers: shared hit=364 read=1609 written=3
         ->  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=2001)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13517
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.321..0.321 rows=1 loops=2001)
                       Buffers: shared hit=45311 read=23677 dirtied=275 written=20
                       ->  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=0.035..0.313 rows=30 loops=2001)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60694
                             Buffers: shared hit=45311 read=23677 dirtied=275 written=20
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.321..0.321 rows=1 loops=2001)
                       Buffers: shared hit=45311 read=23677 dirtied=275 written=20
                       ->  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=0.035..0.313 rows=30 loops=2001)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60694
                             Buffers: shared hit=45311 read=23677 dirtied=275 written=20
 Planning time: 3.194 ms
 Execution time: 693.459 ms
(27 rows)

COMMIT;
COMMIT