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