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#12'
	and p_container = 'JUMBO PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=352533.44..352533.45 rows=1 width=4) (actual time=833.382..833.382 rows=1 loops=1)
   Buffers: shared hit=49044 read=37839 dirtied=186 written=9
   ->  Nested Loop  (cost=130.19..352483.40 rows=20013 width=4) (actual time=0.943..832.402 rows=5553 loops=1)
         Buffers: shared hit=49044 read=37839 dirtied=186 written=9
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7836.86 rows=1984 width=4) (actual time=0.138..29.033 rows=2056 loops=1)
               Index Cond: ((p_container = 'JUMBO PKG'::bpchar) AND (p_brand = 'Brand#12'::bpchar))
               Heap Fetches: 2056
               Buffers: shared hit=592 read=1430
         ->  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=2056)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13819
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.380..0.380 rows=1 loops=2056)
                       Buffers: shared hit=34633 read=36409 dirtied=186 written=9
                       ->  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=0.039..0.371 rows=30 loops=2056)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62531
                             Buffers: shared hit=34633 read=36409 dirtied=186 written=9
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.380..0.380 rows=1 loops=2056)
                       Buffers: shared hit=34633 read=36409 dirtied=186 written=9
                       ->  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=0.039..0.371 rows=30 loops=2056)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62531
                             Buffers: shared hit=34633 read=36409 dirtied=186 written=9
 Planning time: 2.975 ms
 Execution time: 833.574 ms
(27 rows)

COMMIT;
COMMIT