Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19977#discussion_r158501454
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -2171,7 +2171,8 @@ object functions {
def base64(e: Column): Column = withExpr { Base64(e.expr) }
/**
- * Concatenates multiple input string columns together into a single
string column.
+ * Concatenates multiple input columns together into a single column.
+ * If all inputs are binary, concat returns an output as binary.
Otherwise, it returns as string.
--- End diff --
shall we update document for python and R?
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
