作为一名开发人员，您的任务就是创建实现vti目的函数的访问方法以及必要的额外用户定义例程(udrs)来访问您的外部数据源。
As a developer, your task is to create an access method that implements VTI purpose functions and as many additional user-defined routines (UDRs) as necessary to access your external data source.
我希望这个系列的文章能启发其他开发人员出于乐趣、技术或学习挑战的目的而用php来实现数学例程。
I hope that this series of articles inspires other developers to implement math routines in PHP for the pleasure, technical, or learning challenges involved.
Python为处理所有类型的异常提供了广泛的支持，但是出于这些示例程序的目的，我尽量保持其简单。
Python has extensive support for handling all types of exceptions but, for the purposes of these example programs, I've kept it simple.
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