Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18023#discussion_r117690015
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
---
@@ -84,6 +84,28 @@ case class UnresolvedTableValuedFunction(
}
/**
+ * Represents all of the input attributes to a given relational operator,
for example in
+ * "SELECT `(id)?+.+` FROM ...".
+ *
+ * @param table an optional table that should be the target of the
expansion. If omitted all
+ * tables' columns are produced.
+ */
+case class UnresolvedRegex(regexPattern: String, table: Option[String])
--- End diff --
can we move it below `UnresolvedStar`?
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