SFDC Input component getFields - Use parameters for generic transformation

Hi Everyone

I am trying to create a generic transform so that I can pass parameters including SOQL for different tables and get the data and write to text file. But even when I have parametrized it the getfields option needs to be manually clicked for populating the fields when the query changes, which defeats the purpose. Is there a way to make the SFDC input generic for different tables in sfdc and use same transform for all tables by calling it with different parameters?
Any help is appreciated.
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