viirya commented on a change in pull request #29107:
URL: https://github.com/apache/spark/pull/29107#discussion_r458369336
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
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@@ -220,8 +220,15 @@ object Union {
/**
* Logical plan for unioning two plans, without a distinct. This is UNION ALL
in SQL.
+ *
+ * @param byName Whether resolves columns in the children by column
names.
+ * @param allowMissingCol Allows missing columns in children query plans. If
it is true,
+ * this function allows different set of column names
between two Datasets.
*/
-case class Union(children: Seq[LogicalPlan]) extends LogicalPlan {
+case class Union(
+ children: Seq[LogicalPlan],
+ byName: Boolean = false,
+ allowMissingCol: Boolean = false) extends LogicalPlan {
Review comment:
Added.
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