根据以上所述,如果找不到DB 2中具有相同功能的函数,那么可以重写SQL,以不同的方式访问数据。
As just described, if you can't find a DB2 equivalent function, you can rewrite your SQL to access data a different way.
如果找不到位置将调用第二个函数。
如果在检查了所有实参后,仍找不到唯一最佳匹配函数,则该调用错误。编译器将提示该调用具有二义性。
If after looking at each argument there is no single function that is preferable, then the call is in error. The compiler will complain that the call is ambiguous.
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