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Posted to issues@flink.apache.org by "Jark Wu (JIRA)" <ji...@apache.org> on 2017/02/16 02:53:42 UTC

[jira] [Commented] (FLINK-5792) Improve “UDF/UDTF" to support constructor with parameter.

    [ https://issues.apache.org/jira/browse/FLINK-5792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15869029#comment-15869029 ] 

Jark Wu commented on FLINK-5792:
--------------------------------

+1

The serialization way will be more flexible.

> Improve “UDF/UDTF" to support constructor with parameter.
> ---------------------------------------------------------
>
>                 Key: FLINK-5792
>                 URL: https://issues.apache.org/jira/browse/FLINK-5792
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>            Reporter: sunjincheng
>            Assignee: sunjincheng
>
> Currently UDF/UDTF in the codegen phase using a nonparametric constructor to create the instance, causing the user can not include the state value in the UDF/UDTF. The UDF/UDTF's codegen phase can use a serialized mechanism so that the UDTF can contain state values.
> 1. UserDefinedFunction inherits Serializable.
> 2. Modify CodeGenerator about UDF/UDTF part.
> 3. Modify TableAPI about UDF/UDTF
> 4. Add Test.



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