As a web service consumer , ibm db2 web service consumer user - defined functions udfs enables database applications to invoke web services directly using sql statements 作为web服务的用户, ibm db2 web服务客户的用户定义的功能( udf )启用数据库应用程序来使用sql声明直接调用web服务。
The solution for aggregation of timestamp durations is to use timestampdiff , a built - in udf user defined function that is included with db2 udb , as shown in the following example 解决持续时间的聚合问题可以使用timestampdiff ,如下面的样本实例中所显示,它是使用db2 udb实现的嵌入式udf (用户定义的功能) 。
There are various potential enhancements for the next version of w3eval , including the ability to add user - defined functions ; support for fractions , complex numbers , and matrices ; an improved gui ; size and speed optimization ; and security enhacements 下一版w3eval有望在各方面得到增强,包括有能力添加用户定义的功能;支持分数、复数和矩阵;改良的图形用户界面( gui ) ;大小和速度优化以及安全性方面的增强。