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#55'
	and p_container = 'WRAP JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=348456.62..348456.63 rows=1 width=4) (actual time=773.070..773.070 rows=1 loops=1)
   Buffers: shared hit=50954 read=29377 dirtied=281 written=2140
   ->  Nested Loop  (cost=130.19..348406.92 rows=19879 width=4) (actual time=0.881..772.171 rows=5098 loops=1)
         Buffers: shared hit=50954 read=29377 dirtied=281 written=2140
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7745.21 rows=1961 width=4) (actual time=0.170..24.995 rows=1898 loops=1)
               Index Cond: ((p_container = 'WRAP JAR'::bpchar) AND (p_brand = 'Brand#55'::bpchar))
               Heap Fetches: 1898
               Buffers: shared hit=855 read=1018 written=90
         ->  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=1898)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12749
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.383..0.383 rows=1 loops=1898)
                       Buffers: shared hit=37350 read=28359 dirtied=281 written=2050
                       ->  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..0.375 rows=30 loops=1898)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 57822
                             Buffers: shared hit=37350 read=28359 dirtied=281 written=2050
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.383..0.383 rows=1 loops=1898)
                       Buffers: shared hit=37350 read=28359 dirtied=281 written=2050
                       ->  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..0.375 rows=30 loops=1898)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 57822
                             Buffers: shared hit=37350 read=28359 dirtied=281 written=2050
 Planning time: 2.769 ms
 Execution time: 773.244 ms
(27 rows)

COMMIT;
COMMIT