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Posted to issues@flink.apache.org by "Kurt Young (JIRA)" <ji...@apache.org> on 2019/01/30 10:28:00 UTC

[jira] [Closed] (FLINK-6457) Clean up ScalarFunction and TableFunction interface

     [ https://issues.apache.org/jira/browse/FLINK-6457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kurt Young closed FLINK-6457.
-----------------------------
    Resolution: Unresolved

> Clean up ScalarFunction and TableFunction interface
> ---------------------------------------------------
>
>                 Key: FLINK-6457
>                 URL: https://issues.apache.org/jira/browse/FLINK-6457
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API &amp; SQL
>            Reporter: Ruidong Li
>            Assignee: Ruidong Li
>            Priority: Major
>              Labels: pull-request-available
>
> Motivation:
> Some methods in ScalarFunction and TableFunction are unnecessary, e.g toString() and getResultType in ScalarFunction
> this issue intend to clear the interface.
> Goal:
>  only methods related to `Collector` will remain in TableFunction interface, and ScalarFunction interface shall have no methods , user can choose whether to implement the `getResultType` method, which will be called by reflection, and the Flink document will have instructions for user.
> Future:
> There should be some Annotations for user to implement methods like `@Eval` for eval method, it be will in the next issue



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