explain analyze select * from tes ;
QUERY PLAN
---------------------------------------------------------------------------------------------
Seq Scan on tes (cost=0.00..1.02 rows=2 width=4) (actual time=0.006..0.007 rows=2 loops=1)
Planning time: 0.074 ms
Execution time: 0.059 ms

这个plan -time > exec time，怎么理解

pg-10中

select * from tes;
id
----
1
2