topic How to pass a value by reference into a macro? Do I used eval-based definition, and if so, how does it work? in Splunk Enterprise

How to pass a value by reference into a macro? Do I used eval-based definition, and if so, how does it work?

gmagnant — Fri, 17 Mar 2023 20:58:28 GMT

I wrote a simple macro for a string builder for a full name when passed params for FirstName, MiddleName, and LastName.; first screenshot - the macro definition

I can pass the values explicitly to the macro but not by reference from the query that invokes the macro; second screenshot shows the behavior of the macro both when I explicitly pass the values to it and when I attempt to do so by reference when "Use eval-based definition": is NOT checked.

If I DO check the box for "Use eval-based definition", I get the following error:
"Error in 'SearchParser': The definition of macro 'CRE_getFullNameTEST(3)' is expected to be an eval expression that returns a string."

What do I have to do to be able to pass the values contained within FirstName, MiddleName, and LastName to my macro?

Thanks for any assistance with this.

Macro definitionSPL that invokes macro

Re: How to pass a value by reference into a macro? Do I used eval-based definition, and if so, how does it work?

ITWhisperer — Sat, 18 Mar 2023 08:14:19 GMT

Try it this way

Re: How to pass a value by reference into a macro? Do I used eval-based definition, and if so, how does it work?

gmagnant — Mon, 20 Mar 2023 12:54:05 GMT

Many thanks for pointing out the syntax for concatenating a string in the macro.

Works like a charm now.

Now I can go create my dashboard URL builder macro which will be used to send the URL via Splunk alert into a ticketing application.