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Posted to issues@flink.apache.org by "sunjincheng (JIRA)" <ji...@apache.org> on 2017/08/03 05:44:00 UTC

[jira] [Created] (FLINK-7358) Add implicitly converts support for User-defined function

sunjincheng created FLINK-7358:
----------------------------------

             Summary: Add  implicitly converts support for User-defined function
                 Key: FLINK-7358
                 URL: https://issues.apache.org/jira/browse/FLINK-7358
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: sunjincheng
            Assignee: sunjincheng


Currently if user defined a UDF as follows:
{code}
object Func extends ScalarFunction {
  def eval(a: Int, b: Long): String = {
    ...
  }
}
{code}

And if the table schema is (a: Int, b: int, c: String), then we can not call the UDF `Func('a, 'b)`. So
I want add implicitly converts when we call UDF. 

*Note:
In this JIRA. only for TableAPI, And SQL will be fixed in https://issues.apache.org/jira/browse/CALCITE-1908.*

What do you think? [~fhueske]



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