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#44'
	and p_container = 'JUMBO PACK'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=410896.77..410896.78 rows=1 width=4) (actual time=728.258..728.259 rows=1 loops=1)
   Buffers: shared hit=76767 read=13030 dirtied=82 written=857
   ->  Nested Loop  (cost=140.78..410845.53 rows=20496 width=4) (actual time=1.130..727.049 rows=5721 loops=1)
         Buffers: shared hit=76767 read=13030 dirtied=82 written=857
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..8075.12 rows=2046 width=4) (actual time=0.264..35.675 rows=2147 loops=1)
               Index Cond: ((p_container = 'JUMBO PACK'::bpchar) AND (p_brand = 'Brand#44'::bpchar))
               Heap Fetches: 2147
               Buffers: shared hit=505 read=1611 written=85
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.76 rows=10 width=12) (actual time=0.007..0.011 rows=3 loops=2147)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=14355
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.307..0.307 rows=1 loops=2147)
                       Buffers: shared hit=61907 read=11419 dirtied=82 written=772
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.039..0.297 rows=30 loops=2147)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 64402
                             Buffers: shared hit=61907 read=11419 dirtied=82 written=772
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.307..0.307 rows=1 loops=2147)
                       Buffers: shared hit=61907 read=11419 dirtied=82 written=772
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.039..0.297 rows=30 loops=2147)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 64402
                             Buffers: shared hit=61907 read=11419 dirtied=82 written=772
 Total runtime: 728.503 ms
(26 rows)

COMMIT;
COMMIT