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From maropu <...@git.apache.org>
Subject [GitHub] spark pull request #20929: [SPARK-23772][SQL][WIP] Provide an option to igno...
Date Sat, 31 Mar 2018 00:37:03 GMT
Github user maropu commented on a diff in the pull request:

    https://github.com/apache/spark/pull/20929#discussion_r178415303
  
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/types/TypePlaceholder.scala
---
    @@ -0,0 +1,23 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information 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 with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +package org.apache.spark.sql.types
    +
    +/**
    + * An internal type that is a not yet available and will be replaced by an actual type
later.
    + */
    +case object TypePlaceholder extends StringType
    --- End diff --
    
    I just added this weird type for this prototype, so we need to consider more here. I don't
have better idea now, so I'd like to have any suggestion about this.


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