Fabian Hueske commented on FLINK-6810:

Hi [~fdiazgon], sure :).

I suggest to pick one that does not have an open PR and no dependencies. You 
can have a look at the resolved issues to get an idea of what changes are 

Best, Fabian

> Add Some built-in Scalar Function supported
> -------------------------------------------
>                 Key: FLINK-6810
>                 URL: https://issues.apache.org/jira/browse/FLINK-6810
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>    Affects Versions: 1.4.0
>            Reporter: sunjincheng
>            Assignee: sunjincheng
>            Priority: Major
>              Labels: starter
> In this JIRA, will create some sub-task for add specific scalar function, 
> such as mathematical-function {{LOG}}, date-functions
>  {{DATEADD}},string-functions {{LPAD}}, etc. 
> I think is good way to let SQL work, and then add TableAPI to supported. So I 
> suggest one scalar function create two sub-task, one is for SQL. another for 
> TableAPI.
> *Note:*
> Every scalar function should add TableAPI doc in  
> {{./docs/dev/table/tableApi.md#built-in-functions}}. 
> Add SQL doc in {{./docs/dev/table/sql.md#built-in-functions}}.
> Welcome anybody to add the sub-task about standard database scalar function.

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