Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/16561#discussion_r96167779 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/view.scala --- @@ -28,22 +28,56 @@ import org.apache.spark.sql.catalyst.rules.Rule */ /** - * Make sure that a view's child plan produces the view's output attributes. We wrap the child - * with a Project and add an alias for each output attribute. The attributes are resolved by - * name. This should be only done after the batch of Resolution, because the view attributes are - * not completely resolved during the batch of Resolution. + * Make sure that a view's child plan produces the view's output attributes. We try to wrap the + * child by: + * 1. Generate the `queryOutput` by: + * 1.1. If the query column names are defined, map the column names to attributes in the child + * output by name; --- End diff -- should we mention that, this is mostly for `SELECT * ...`?
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