[Res] How to avoid property transfer if the value is null?

Hi

I have some properties defined for the testcase with default values

I run a database test step and property transfer test step

I am transferring the properties to the testcase properties to update them to my database results

But , I do not want to transfer the values if the database result is null as it will override the existing default test case property values

Is there a way to make Soap stop/not/ignore transfer if the parameter value is null

Hope this explanation is good enough