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https://issues.apache.org/jira/browse/FLINK-5881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15881789#comment-15881789
 ] 

ASF GitHub Bot commented on FLINK-5881:
---------------------------------------

Github user clarkyzl commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3389#discussion_r102865002
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/utils/UserDefinedFunctionUtils.scala
 ---
    @@ -78,20 +78,7 @@ object UserDefinedFunctionUtils {
           function: UserDefinedFunction,
           signature: Seq[TypeInformation[_]])
         : Option[Array[Class[_]]] = {
    -    // We compare the raw Java classes not the TypeInformation.
    -    // TypeInformation does not matter during runtime (e.g. within a 
MapFunction).
    -    val actualSignature = typeInfoToClass(signature)
    -    val signatures = getSignatures(function)
    -
    -    signatures
    -      // go over all signatures and find one matching actual signature
    -      .find { curSig =>
    -      // match parameters of signature to actual parameters
    -      actualSignature.length == curSig.length &&
    -        curSig.zipWithIndex.forall { case (clazz, i) =>
    -          parameterTypeEquals(actualSignature(i), clazz)
    -        }
    -    }
    --- End diff --
    
    I deleted them, because both methods are simply copy and paste. One was 
used for ScalarFunction, the other was used for TableFunction.


> ScalarFunction(UDF) should support variable types and variable arguments      
> -------------------------------------------------------------------------
>
>                 Key: FLINK-5881
>                 URL: https://issues.apache.org/jira/browse/FLINK-5881
>             Project: Flink
>          Issue Type: Sub-task
>            Reporter: Zhuoluo Yang
>            Assignee: Zhuoluo Yang
>
> As a sub-task of FLINK-5826. We would like to support the ScalarFunction 
> first and make the review a little bit easier.



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