ArcGISEngine问答:为什么地理数据库中不能产生同名要素类
之所以产生这样的问题,其原因是无论一个要素类是直接放在工作空问中,还是放在工作空问的一个要素数据集中,这些差别仅仅是逻辑上的,而它们的物理组成都是数据库中的一张二维表,并目表名就是要素类的名字,在一个数据库中不能出现两个同名的二维表,因此
之所以产生这样的问题,其原因是无论一个要素类是直接放在工作空问中,还是放在工作空问的一个要素数据集中,这些差别仅仅是逻辑上的,而它们的物理组成都是数据库中的一张二维表,并目表名就是要素类的名字,在一个数据库中不能出现两个同名的二维表,因此也就不能产生两个同名的要素类。
也就是说如果在工作空问中存在一个名为A的要素类和B的要素数据集,B中如果再产生一个名为A的要素类是不会成功的。
因此可以使用IFeatureWorkspace::OpenFeatureClass方法可以打开工作空问中的任何一个要素类,无论它是直接存放在工作空问还是存放在工作空问中的一个要素数据集中。

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