How to apply rex on a field/variable?

[viggor]

I have a basic rex question:

In my splunk query I have:

| eval foo = ....

and I would like to be able to apply rex on foo but I don't seem to able to do so?

Does anybody know how to apply splunk regex on a variable defined in a query, such a foo above?

[micahkemp · Accepted solution]

| rex field=<field> "<regex>"