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#52'
	and p_container = 'SM DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=356606.21..356606.22 rows=1 width=4) (actual time=835.286..835.286 rows=1 loops=1)
   Buffers: shared hit=52846 read=32615 dirtied=100 written=42
   ->  Nested Loop  (cost=130.19..356555.90 rows=20125 width=4) (actual time=0.798..834.304 rows=5501 loops=1)
         Buffers: shared hit=52846 read=32615 dirtied=100 written=42
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7925.28 rows=2007 width=4) (actual time=0.152..26.821 rows=2040 loops=1)
               Index Cond: ((p_container = 'SM DRUM'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 2040
               Buffers: shared hit=963 read=1046 written=2
         ->  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=2040)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13699
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.386..0.386 rows=1 loops=2040)
                       Buffers: shared hit=38184 read=31569 dirtied=100 written=40
                       ->  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=0.037..0.377 rows=30 loops=2040)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61325
                             Buffers: shared hit=38184 read=31569 dirtied=100 written=40
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.386..0.386 rows=1 loops=2040)
                       Buffers: shared hit=38184 read=31569 dirtied=100 written=40
                       ->  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=0.037..0.377 rows=30 loops=2040)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61325
                             Buffers: shared hit=38184 read=31569 dirtied=100 written=40
 Planning time: 3.284 ms
 Execution time: 835.459 ms
(27 rows)

COMMIT;
COMMIT