Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/18144#discussion_r119124578
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1007,6 +1007,17 @@ object functions {
def map(cols: Column*): Column = withExpr { CreateMap(cols.map(_.expr)) }
/**
+ * Creates a new map column. The input columns must be grouped as
key-value pairs, e.g.
+ * (key1, value1, key2, value2, ...). The key columns must all have the
same data type, and can't
+ * be null. The value columns must all have the same data type.
+ *
+ * @group normal_funcs
+ * @since 2.3
+ */
+ @scala.annotation.varargs
+ def map(colName: String, colNames: String*): Column = map((colName +:
colNames).map(col) : _*)
--- End diff --
nit: need bracket:
```
def map(colName: String, colNames: String*): Column = {
map((colName +: colNames).map(col) : _*)
}
```
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