Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/6724#discussion_r32083514
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1299,6 +1300,19 @@ object functions {
*/
def toRadians(columnName: String): Column = toRadians(Column(columnName))
+ /**
+ * Length of a given string value
+ * @group string_funcs
+ * @since 1.5.0
+ */
+ def strlen(e: Column): Column = StringLength(e.expr)
+
+ /**
+ * Length of a given string column
+ * @group string_funcs
+ * @since 1.5.0
+ */
+ def strlen(columnName: String): Column = strlen(Column(columnName))
--- End diff --
Could you also add functions for other string expressions like substring?
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