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

    https://github.com/apache/flink/pull/2562#discussion_r82968570
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/typeutils/TimeIntervalTypeInfo.scala
 ---
    @@ -24,14 +24,14 @@ import org.apache.flink.api.common.ExecutionConfig
     import org.apache.flink.api.common.typeinfo.{AtomicType, TypeInformation}
     import org.apache.flink.api.common.typeutils.base.{IntComparator, 
IntSerializer, LongComparator, LongSerializer}
     import org.apache.flink.api.common.typeutils.{TypeComparator, 
TypeSerializer}
    -import 
org.apache.flink.api.table.typeutils.IntervalTypeInfo.instantiateComparator
    +import 
org.apache.flink.api.table.typeutils.TimeIntervalTypeInfo.instantiateComparator
     import org.apache.flink.util.Preconditions._
     
     /**
       * TypeInformation for SQL INTERVAL types.
       */
     @SerialVersionUID(-1816179424364825258L)
    -class IntervalTypeInfo[T](
    +class TimeIntervalTypeInfo[T](
    --- End diff --
    
    Define `TimeIntervalTypeInfo` as 
    ```
    class TimeIntervalTypeInfo[T](
        val clazz: Class[T],
        val serializer: TypeSerializer[T],
        val comparatorClazz: Class[_ <: TypeComparator[T]])
      extends IntegerTypeInfo[T](
        clazz,
        Array[Class[_]](classOf[Float], classOf[Double], classOf[Character]),
        serializer,
        comparatorClazz)
    
    object TimeIntervalTypeInfo {
    
      val INTERVAL_MONTHS = new TimeIntervalTypeInfo(
        classOf[java.lang.Integer],
        IntSerializer.INSTANCE,
        classOf[IntComparator])
    
      val INTERVAL_MILLIS = new TimeIntervalTypeInfo(
        classOf[java.lang.Long],
        LongSerializer.INSTANCE,
        classOf[LongComparator])
    
    }
    ```


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