Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/18026#discussion_r117312841 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala --- @@ -163,16 +163,10 @@ trait StreamSinkProvider { @InterfaceStability.Stable trait CreatableRelationProvider { /** - * Save the DataFrame to the destination and return a relation with the given parameters based on - * the contents of the given DataFrame. The mode specifies the expected behavior of createRelation - * when data already exists. - * Right now, there are three modes, Append, Overwrite, and ErrorIfExists. - * Append mode means that when saving a DataFrame to a data source, if data already exists, - * contents of the DataFrame are expected to be appended to existing data. - * Overwrite mode means that when saving a DataFrame to a data source, if data already exists, - * existing data is expected to be overwritten by the contents of the DataFrame. - * ErrorIfExists mode means that when saving a DataFrame to a data source, - * if data already exists, an exception is expected to be thrown. + * Saves a DataFrame to a destination (using data source-specific parameters) + * + * @param mode specifies what happens when the destination already exists + * @param parameters data source-specific parameters --- End diff -- Could you add the descriptions for the other two parameters here? Thanks!
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