创建用户定义的函数来模拟MySQL功能。

Create user-defined functions to emulate MySQL features.

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Oracle 9.2 方法的功能是通过 MTK 部署到目标数据库的一系列用户定义函数来实现的。

The Oracle 9.2 method functionality is achieved through a series of user-defined functions that MTK deploys to the target database. These six supported UTL_FILE methods are

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所以，通过明智而审慎地使用变量和用户自定义函数，以及尽量使用标准工具以避免特殊的功能，我们就可以提高makefile的可移植性。

So, by judicious use of variables and user-defined functions, and by minimizing the use of exotic features and relying on standard tools, we can increase the portability of our makefiles.

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