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From: clarkyzl <git@git.apache.org>
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Subject: [GitHub] flink pull request #3389: [FLINK-5881] [table] ScalarFunction(UDF) should su...
Content-Type: text/plain
Message-Id: <20170301083447.4C0AADF9AC@git1-us-west.apache.org>
Date: Wed,  1 Mar 2017 08:34:47 +0000 (UTC)
archived-at: Wed, 01 Mar 2017 08:34:51 -0000

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

    https://github.com/apache/flink/pull/3389#discussion_r103632469
  
    --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/utils/ScalarSqlFunction.scala ---
    @@ -112,9 +112,16 @@ object ScalarSqlFunction {
               .getParameterTypes(foundSignature)
               .map(typeFactory.createTypeFromTypeInfo)
     
    -        inferredTypes.zipWithIndex.foreach {
    -          case (inferredType, i) =>
    -            operandTypes(i) = inferredType
    +        operandTypes.zipWithIndex.foreach {
    +          case (_, i) =>
    +            if (i < inferredTypes.length - 1) {
    +              operandTypes(i) = inferredTypes(i)
    +            } else if (null != inferredTypes.last.getComponentType) {
    +              // last arguments is a collection, the array type
    +              operandTypes(i) = inferredTypes.last.getComponentType
    +            } else {
    +              operandTypes(i) = inferredTypes.last
    +            }
    --- End diff --
    
    The logic here has also been changed.


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