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#53'
	and p_container = 'WRAP BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=354480.28..354480.29 rows=1 width=4) (actual time=727.284..727.284 rows=1 loops=1)
   Buffers: shared hit=51889 read=31027 dirtied=102
   ->  Nested Loop  (cost=130.19..354430.32 rows=19985 width=4) (actual time=0.694..726.304 rows=5313 loops=1)
         Buffers: shared hit=51889 read=31027 dirtied=102
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7881.52 rows=1995 width=4) (actual time=0.139..21.107 rows=1986 loops=1)
               Index Cond: ((p_container = 'WRAP BAG'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 1986
               Buffers: shared hit=1148 read=797
         ->  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=1986)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13303
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.345..0.345 rows=1 loops=1986)
                       Buffers: shared hit=37438 read=30230 dirtied=102
                       ->  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..0.337 rows=30 loops=1986)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59395
                             Buffers: shared hit=37438 read=30230 dirtied=102
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.345..0.345 rows=1 loops=1986)
                       Buffers: shared hit=37438 read=30230 dirtied=102
                       ->  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..0.337 rows=30 loops=1986)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59395
                             Buffers: shared hit=37438 read=30230 dirtied=102
 Planning time: 3.513 ms
 Execution time: 727.450 ms
(27 rows)

COMMIT;
COMMIT