* User-defined variables 用户自定义的变量 * User-defined functions 用户自定义的函数 * Complex numbers supported by any operation and any function 对任意运作及功能，复杂数字的支持 ..
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这里的业务逻辑是由用户自定义的函数子实现，并且这些函数子只能用在逻辑记录处理的工作上，而不用关心多个处理操作的问题。
The business logic is implemented in user-definable functors that only work on logical record processing and aren't concerned with multiprocessing issues.
你可以可以为变量指明数据类型，输入参数，来自函数的返回值，用户自定义函数以及模板。
You are also able to specify data types for variables, input parameters, return values from functions, user-defined functions and templates.
RDA具有向导、编辑器以及DB2的调试程序，可以帮助开发sql语句、存储过程和用户自定义函数。
RDA has wizards, an editor, and a debugger for DB2 that helps in the development of SQL statements, stored procedures and user-defined functions.
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