Hi Ashutosh,
We have ever encountered a similar problem when we need to support 'fake'
Hive functions in Calcite and push it down.
Our approach is to use Object.class to define functions.
e.g.
public static class Dummy {
public String trim(Object arg) {
......
}
}
Best,
Feng
Ashutosh Marathe <[email protected]> 于2020年1月16日周四
上午4:06写道：
> Hi,
>
> This mail was requesting for help for the problem we are facing in apache
> calcite to have custom function support with different datatypes. We want
> to support same function name with different datatype (e.g. We want to have
> a trim function to be supported for int, float, String etc. datatypes).
> Currently we register the custom functions via making entry for custom
> functions in model.json. Currently by that approach, I can only add one
> entry for trim function and hence I can only use trim for one of the
> datatypes and not all. How can I achieve the requirement explained above in
> apache calcite. We are using apache calcite version 1.17.0.
>
> Thanking you in advance for the help.
>
> Awaiting a response on this query.
>
> Regards,
>
> Ashutosh Marathe
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