The Workers can be used to prefetchdata or perform other ahead-of-time operations to provide a much more lively UI.
这些Workers可用于预取数据或执行其他预先操作,从而提供一个更加实时的UI。
2
When DB2 does not have an index in the appropriate order for sort avoidance or when DB2 USES any index the LIST PREFETCH way, then an order BY will most certainly cause a data sort.