Github user fhueske commented on a diff in the pull request:
    --- Diff: 
    @@ -0,0 +1,108 @@
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
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    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
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    +package org.apache.flink.api.table.typeutils
    +import java.util.Objects
    +import org.apache.flink.api.common.ExecutionConfig
    +import org.apache.flink.api.common.typeinfo.{AtomicType, TypeInformation}
    +import org.apache.flink.api.common.typeutils.base.{LongComparator, 
    +import org.apache.flink.api.common.typeutils.{TypeComparator, 
    +import org.apache.flink.util.Preconditions._
    +  * TypeInformation for row intervals.
    +  */
    +class RowIntervalTypeInfo[T](
    --- End diff --
    I know why we need this class, but IMO it doesn't look like a clean design 
to require a `TypeInformation` for things that will never be serialized or 
compared during execution. Did we consider using Calcite's type system during 

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