[jira] [Updated] (FLINK-13191) Add a simplified UDF type extraction

["Timo Walther (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-13191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Timo Walther updated FLINK-13191:
---------------------------------
        Parent:     (was: FLINK-12251)
    Issue Type: New Feature  (was: Sub-task)

> Add a simplified UDF type extraction
> ------------------------------------
>
>                 Key: FLINK-13191
>                 URL: https://issues.apache.org/jira/browse/FLINK-13191
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table SQL / API
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>            Priority: Major
>
> Currently, the input, accumulator, and output types of UDFs are partially defined within an UDF and outside of the UDF in language-specific table environments (Scala vs. Java). This makes UDFs environment-dependent and not modular. It also blocks the unified {{org.apache.flink.table.api.TableEnvironment}}.
> A better approach is to perform the type extraction Table API specific within the UDF and let users add additional information through UDF annotations.
> An exact annotation and extraction design will follow.



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