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From marmbrus <>
Subject [GitHub] spark pull request: [SPARK-5595][SPARK-5603][SQL] Add a rule to do...
Date Wed, 04 Feb 2015 23:38:53 GMT
Github user marmbrus commented on a diff in the pull request:
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala ---
    @@ -158,6 +158,20 @@ trait CatalystScan extends BaseRelation {
    + * ::DeveloperApi::
    + * A BaseRelation that can be used to insert data into it through the insert method.
    + * If overwrite in insert method is true, the old data in the relation should be overwritten
    + * the new data. If overwrite in insert method is false, the new data should be appended.
    + *
    + * InsertableRelation assumes that the data (Rows in the DataFrame) provided to the insert
    + * exactly matches the ordinal of fields in the schema of the BaseRelation.
    + * InsertableRelation assumes that the schema of this relation will not be changed.
    + * Even if the insert method updates the schema, the new schema cannot be used.
    + */
     trait InsertableRelation extends BaseRelation {
    +  /** If this relation treats fields with different nullability as the same fields */
    +  def ignoreNullability: Boolean
    --- End diff --
    I'd remove this and always assume `true`.

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