Github user maropu commented on a diff in the pull request: https://github.com/apache/spark/pull/22320#discussion_r214609005 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala --- @@ -460,9 +460,9 @@ case class DataSource( * @param mode The save mode for this writing. * @param data The input query plan that produces the data to be written. Note that this plan * is analyzed and optimized. - * @param outputColumns The original output columns of the input query plan. The optimizer may not - * preserve the output column's names' case, so we need this parameter - * instead of `data.output`. + * @param outputColumnNames The original output column names of the input query plan. The + * optimizer may not preserve the output column's names' case, so we need + * this parameter instead of `data.output`. --- End diff -- nit: ``` * @param outputColumnNames The original output column names of the input query plan. The * optimizer may not preserve the output column's names' case, so we need * this parameter instead of `data.output`. ```
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