Hi Billy - I’m assuming you’re calling the stored proc from a flow service. I believe webMethods handles this for you. The input value you pass to your stored procedure will be a String in the pipeline that you map into the ‘call’ service. You shouldn’t need to convert it to a String - since it already is one.
Using a transformer has no relevance to your problem and the makeString concatenates an array of strings into one string (again no relevance to your problem).
Will
#Flow-and-Java-services#webMethods#Integration-Server-and-ESB