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 = 'JUMBO DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=347383.23..347383.25 rows=1 width=4) (actual time=462.549..462.549 rows=1 loops=1)
   Buffers: shared hit=71453 read=10144
   ->  Nested Loop  (cost=130.19..347334.32 rows=19565 width=4) (actual time=1.056..461.661 rows=5253 loops=1)
         Buffers: shared hit=71453 read=10144
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7720.57 rows=1955 width=4) (actual time=0.199..28.176 rows=1945 loops=1)
               Index Cond: ((p_container = 'JUMBO DRUM'::bpchar) AND (p_brand = 'Brand#23'::bpchar))
               Heap Fetches: 1945
               Buffers: shared hit=14 read=1904
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.004..0.006 rows=3 loops=1945)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13070
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.214..0.214 rows=1 loops=1945)
                       Buffers: shared hit=58369 read=8240
                       ->  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=0.028..0.207 rows=30 loops=1945)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58531
                             Buffers: shared hit=58369 read=8240
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.214..0.214 rows=1 loops=1945)
                       Buffers: shared hit=58369 read=8240
                       ->  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=0.028..0.207 rows=30 loops=1945)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58531
                             Buffers: shared hit=58369 read=8240
 Planning time: 4.739 ms
 Execution time: 462.832 ms
(27 rows)

COMMIT;
COMMIT