刷新表Refresh Table

REFRESH TABLE [db_name.]table_name

刷新与该表关联的所有缓存条目。Refresh all cached entries associated with the table. 如果以前缓存过该表,则会在下次扫描时延迟缓存该表。If the table was previously cached, then it would be cached lazily the next time it is scanned.