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https://issues.apache.org/jira/browse/FLINK-5225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu reassigned FLINK-5225:
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Assignee: Jark Wu
> Add interface to override parameter types of UDTF's eval method
> ---------------------------------------------------------------
>
> Key: FLINK-5225
> URL: https://issues.apache.org/jira/browse/FLINK-5225
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Jark Wu
> Assignee: Jark Wu
>
> {{ScalarFunction}} has {{getParameterTypes()}} to be overridden if the
> parameter types of the eval method can not be determined automatically. This
> is missing in {{TableFunction}}.
> This needs to implement a custom Calcite's {{TableFunction}} and override
> {{getParameters()}}. But currently, the {{FlinkTableFunctionImpl}} extends
> {{ReflectiveFunctionBase}}, the {{ReflectiveFunctionBase}} determines the
> parameter types of the eval method.
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