Creating a multivalue field from a result?

Hey everyone,

So this feels like something I should be able to do with the standard search language, but I am failing at it.

I have a result, coming from a custom command, that contains field like this:

entries.0.category\_name, entries.1.category\_name,...,entries.n.category\_name

I would like to take all of these and either create a multi-value field with all of the values in them, or create just one string joining all of the values of entries.*.category_name together, with a comma.

I want something like:

| eval mvjoin(entries.*.category_name, ",")

But Splunk does not like that.

Any thoughts?

Thanks,

Dave