Rexgex Extractor - always in upper case?

Hi, Graylog-friends,
i have a regex extrator for a Symantec Endpoint Protection Log. Unfortunately, Symantec sometimes writes the username in upper case, sometimes lower case. Like

…,Username: peter, …
…,Username: PETER, …

Regular expressions:
,Username: (.+?),

Is there a way in Graylog regular expressions, to get the resul always in upper case?

No, but you could use a custom pipeline rule to make the string upper case:

Thank you for this quick response! I will take a look at the custom pipelines.

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