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#23'
	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=358202.05..358202.06 rows=1 width=4) (actual time=733.486..733.486 rows=1 loops=1)
   Buffers: shared hit=53774 read=27286 dirtied=46
   ->  Nested Loop  (cost=130.19..358151.51 rows=20216 width=4) (actual time=0.722..732.612 rows=5155 loops=1)
         Buffers: shared hit=53774 read=27286 dirtied=46
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7962.23 rows=2016 width=4) (actual time=0.142..34.495 rows=1944 loops=1)
               Index Cond: ((p_container = 'SM DRUM'::bpchar) AND (p_brand = 'Brand#23'::bpchar))
               Heap Fetches: 1944
               Buffers: shared read=1918
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.60 rows=10 width=12) (actual time=0.005..0.006 rows=3 loops=1944)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12974
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.349..0.349 rows=1 loops=1944)
                       Buffers: shared hit=40800 read=25368 dirtied=46
                       ->  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..0.341 rows=30 loops=1944)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58104
                             Buffers: shared hit=40800 read=25368 dirtied=46
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.349..0.349 rows=1 loops=1944)
                       Buffers: shared hit=40800 read=25368 dirtied=46
                       ->  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..0.341 rows=30 loops=1944)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58104
                             Buffers: shared hit=40800 read=25368 dirtied=46
 Planning time: 3.780 ms
 Execution time: 733.670 ms
(27 rows)

COMMIT;
COMMIT