Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/6775#discussion_r32400743
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -914,6 +914,42 @@ object functions {
def ceil(columnName: String): Column = ceil(Column(columnName))
/**
+ * Computes the concat of the given values.
+ *
+ * @group normal_funcs
+ * @since 1.5.0
+ */
+ @scala.annotation.varargs
+ def concat(exprs: Column*): Column = Concat(exprs.map(_.expr): _*)
+
+ /**
+ * Computes the concat of the given column names.
+ *
+ * @group normal_funcs
+ * @since 1.5.0
+ */
+ @scala.annotation.varargs
+ def concat(columnName: String, columnNames: String*): Column =
+ concat((columnName +: columnNames).map(Column.apply): _*)
+
+ /**
+ * Computes the concat_ws of the given columns with given separator.
+ *
+ * @group normal_funcs
+ * @since 1.5.0
+ */
+ @scala.annotation.varargs
+ def concat_ws(sep: Column, exprs: Column*): Column = concat_ws(sep,
array(exprs: _*))
+
+ /**
+ * Computes the concat_ws of the given columns with given separator.
+ *
+ * @group normal_funcs
+ * @since 1.5.0
+ */
+ def concat_ws(sep: Column, exprs: Column): Column = ConcatWS(sep.expr,
exprs.expr)
--- End diff --
I don't think that's necessary, the `ConcatWS` can handle the `array` stuff
internally.
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