Finally, the validity criterion of the scan variable table built is given by analyzing the maximum waiting time.
通过对周期性变量最大等待时间的分析，给出判断扫描变量表有效性判据。
Furthermore, deleted rows are skipped unconditionally on table scan access while deleted keys are not skipped for type-2 index scans unless the registry variable DB2_SKIPDELETED is also set.
而且，虽然在type - 2索引扫描中，被删除的行不会被跳过，但是除非同时设置了注册表变量db2_skipdeleted，否则在表扫描访问中，被删除的行将被无条件跳过。
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