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 = 'JUMBO DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=344549.09..344549.10 rows=1 width=4) (actual time=793.232..793.232 rows=1 loops=1)
   Buffers: shared hit=50550 read=34962 dirtied=63
   ->  Nested Loop  (cost=130.19..344500.53 rows=19424 width=4) (actual time=0.806..792.293 rows=5374 loops=1)
         Buffers: shared hit=50550 read=34962 dirtied=63
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7660.03 rows=1939 width=4) (actual time=0.160..33.952 rows=2044 loops=1)
               Index Cond: ((p_container = 'JUMBO DRUM'::bpchar) AND (p_brand = 'Brand#55'::bpchar))
               Heap Fetches: 2044
               Buffers: shared hit=5 read=2003
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.005..0.007 rows=3 loops=2044)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13591
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.361..0.361 rows=1 loops=2044)
                       Buffers: shared hit=36954 read=32959 dirtied=63
                       ->  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..0.352 rows=30 loops=2044)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61408
                             Buffers: shared hit=36954 read=32959 dirtied=63
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.361..0.361 rows=1 loops=2044)
                       Buffers: shared hit=36954 read=32959 dirtied=63
                       ->  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..0.352 rows=30 loops=2044)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61408
                             Buffers: shared hit=36954 read=32959 dirtied=63
 Planning time: 3.538 ms
 Execution time: 793.412 ms
(27 rows)

COMMIT;
COMMIT