DataWeave 2.1 is compatible with Mule 4.1. Standard Support for Mule 4.1 ended on November 2, 2020, and this version of Mule will reach its End of Life on November 2, 2022, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

upper(String): String

Returns the provided string in upper-case characters.


Name Description


The string to convert to uppercase.


This example converts lowercase characters to uppercase.


%dw 2.0
output application/json
  "name" : upper("mulesoft")


  "name": "MULESOFT"

upper(Null): Null

Helper function that allows upper to work with null values.

Was this article helpful?

💙 Thanks for your feedback!

Edit on GitHub
Submit your feedback!
Share your thoughts to help us build the best documentation experience for you!
Take our latest survey!