Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/7208#discussion_r35216178
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1765,6 +1765,24 @@ object functions {
}
/**
+ * Returns string, with the first letter of each word in uppercase,
+ * all other letters in lowercase. Words are delimited by whitespace.
+ *
+ * @group string_funcs
+ * @since 1.5.0
+ */
+ def initcap(e: Column): Column = InitCap(e.expr)
+
+ /**
+ * Returns string, with the first letter of each word in uppercase,
+ * all other letters in lowercase. Words are delimited by whitespace.
+ *
+ * @group string_funcs
+ * @since 1.5.0
+ */
+ def initcap(columnName: String): Column = initcap(Column(columnName))
--- End diff --
As @rxin made some clean up for the DF function, we'd better remove the
`columnName` version of API.
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