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#24'
	and p_container = 'LG CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=406187.10..406187.11 rows=1 width=4) (actual time=2750.845..2750.845 rows=1 loops=1)
   Buffers: shared hit=43426 read=35965 dirtied=364
   ->  Nested Loop  (cost=144.80..406137.81 rows=19717 width=4) (actual time=1.889..2748.467 rows=5139 loops=1)
         Buffers: shared hit=43426 read=35965 dirtied=364
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7684.33 rows=1945 width=4) (actual time=0.328..96.444 rows=1887 loops=1)
               Index Cond: ((p_container = 'LG CASE'::bpchar) AND (p_brand = 'Brand#24'::bpchar))
               Heap Fetches: 1887
               Buffers: shared hit=58 read=1791
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=144.80..204.75 rows=11 width=12) (actual time=0.062..0.084 rows=3 loops=1887)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12734
               SubPlan 1
                 ->  Aggregate  (cost=144.79..144.80 rows=1 width=4) (actual time=1.308..1.308 rows=1 loops=1887)
                       Buffers: shared hit=30634 read=34174 dirtied=364
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..144.70 rows=32 width=4) (actual time=0.143..1.287 rows=30 loops=1887)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 56981
                             Buffers: shared hit=30634 read=34174 dirtied=364
               SubPlan 1
                 ->  Aggregate  (cost=144.79..144.80 rows=1 width=4) (actual time=1.308..1.308 rows=1 loops=1887)
                       Buffers: shared hit=30634 read=34174 dirtied=364
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..144.70 rows=32 width=4) (actual time=0.143..1.287 rows=30 loops=1887)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 56981
                             Buffers: shared hit=30634 read=34174 dirtied=364
 Total runtime: 2751.134 ms
(26 rows)

COMMIT;
COMMIT