Clew: This method just conceals driver icon, the user still can use other method to visit the content of driver, if key in the catalog method on driver directly in address column.

提示：这个方法只是隐藏驱动器图标，用户仍可使用其他方法访问驱动器的内容，如在地址栏中直接键入驱动器上的目录路径。

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I'll discuss this method in the section Alternative ways of collecting catalog statistics.

我将在收集目录统计信息的备选方法小节中讨论该方法。

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The DB2 optimizer then queries system information and statistics stored in the DB2 system catalog to determine the best method of accomplishing the tasks necessary to satisfy the SQL request.

DB 2优化器然后查询存储在DB 2系统目录中的系统信息和统计信息，以确定完成满足SQL请求所必需的任务的最佳方法。

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