Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7606#discussion_r35290210
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1720,4 +1720,11 @@ object functions {
UnresolvedFunction(udfName, cols.map(_.expr))
}
+ /**
+ * Parsers the comma separated expression strings into the columns they
represent, similar to
+ * DataFrame.selectExpr
--- End diff --
can you add groups for this?
Also I think this should just return a single Column. Otherwise users have
to keep doing : _*
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