Data from SQL to Azure Data Lake Gen2

What I want to do:
Input: Query from a SQL MariaDB
Output: Put everything into an Azure Data Lake Gen2

What Azure wants in order to put a file on the data lake:

  • A precise count of all characters in the input

My problem:

  • How do I in my filter count every character (also { and , ) from the event from the input? (Not a specific field in the row, but the whole deal)