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#11'
	and p_container = 'JUMBO CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=341714.53..341714.54 rows=1 width=4) (actual time=773.403..773.404 rows=1 loops=1)
   Buffers: shared hit=54066 read=29029 dirtied=38 written=22
   ->  Nested Loop  (cost=130.19..341666.32 rows=19283 width=4) (actual time=0.712..772.432 rows=5202 loops=1)
         Buffers: shared hit=54066 read=29029 dirtied=38 written=22
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7599.64 rows=1923 width=4) (actual time=0.152..35.746 rows=1985 loops=1)
               Index Cond: ((p_container = 'JUMBO CASE'::bpchar) AND (p_brand = 'Brand#11'::bpchar))
               Heap Fetches: 1985
               Buffers: shared hit=59 read=1888
         ->  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..0.007 rows=3 loops=1985)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13187
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.361..0.361 rows=1 loops=1985)
                       Buffers: shared hit=40820 read=27141 dirtied=38 written=22
                       ->  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=0.038..0.352 rows=30 loops=1985)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59703
                             Buffers: shared hit=40820 read=27141 dirtied=38 written=22
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.361..0.361 rows=1 loops=1985)
                       Buffers: shared hit=40820 read=27141 dirtied=38 written=22
                       ->  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=0.038..0.352 rows=30 loops=1985)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59703
                             Buffers: shared hit=40820 read=27141 dirtied=38 written=22
 Planning time: 3.452 ms
 Execution time: 773.597 ms
(27 rows)

COMMIT;
COMMIT