[GitHub] spark pull request #16561: [SPARK-18801][SQL][FOLLOWUP] Alias the view with ...

[cloud-fan <gi...@git.apache.org>]

Github user cloud-fan commented on a diff in the pull request:

    https://github.com/apache/spark/pull/16561#discussion_r96157156
  
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/interface.scala ---
    @@ -198,9 +203,44 @@ case class CatalogTable(
     
       /**
        * Return the default database name we use to resolve a view, should be None if the CatalogTable
    -   * is not a View.
    +   * is not a View or created by older versions of Spark(before 2.2.0).
    +   */
    +  def viewDefaultDatabase: Option[String] = properties.get(VIEW_DEFAULT_DATABASE)
    +
    +  /**
    +   * Return the output column names of the query that creates a view, the column names are used to
    +   * resolve a view, should be None if the CatalogTable is not a View or created by older versions
    --- End diff --
    
    should be `Nil`


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