Github user wzhfy commented on a diff in the pull request:
https://github.com/apache/spark/pull/16422#discussion_r138510770
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala ---
@@ -626,6 +624,74 @@ case class DescribeTableCommand(
}
}
+/**
+ * A command to list the info for a column, including name, data type,
column stats and comment.
+ * This function creates a [[DescribeColumnCommand]] logical plan.
--- End diff --
A followup PR to improve the comments is sent:
https://github.com/apache/spark/pull/19213
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