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#22'
	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=360501.74..360501.75 rows=1 width=4) (actual time=623.532..623.532 rows=1 loops=1)
   Buffers: shared hit=57550 read=25875 dirtied=57 written=25
   ->  Nested Loop  (cost=130.19..360450.92 rows=20326 width=4) (actual time=0.748..622.625 rows=5409 loops=1)
         Buffers: shared hit=57550 read=25875 dirtied=57 written=25
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..8010.48 rows=2029 width=4) (actual time=0.130..28.557 rows=1979 loops=1)
               Index Cond: ((p_container = 'JUMBO DRUM'::bpchar) AND (p_brand = 'Brand#22'::bpchar))
               Heap Fetches: 1979
               Buffers: shared read=1932
         ->  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=1979)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13362
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.291..0.291 rows=1 loops=1979)
                       Buffers: shared hit=44188 read=23943 dirtied=57 written=25
                       ->  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=0.033..0.282 rows=30 loops=1979)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59911
                             Buffers: shared hit=44188 read=23943 dirtied=57 written=25
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.291..0.291 rows=1 loops=1979)
                       Buffers: shared hit=44188 read=23943 dirtied=57 written=25
                       ->  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=0.033..0.282 rows=30 loops=1979)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59911
                             Buffers: shared hit=44188 read=23943 dirtied=57 written=25
 Planning time: 3.282 ms
 Execution time: 623.750 ms
(27 rows)

COMMIT;
COMMIT