is there any way to check a global parameter is set or not?

[liuzqt]

The title said it. I have several conditional executions in my dag, so some global output parameters might not be set if some previous tasks are skipped.

[thegreymatter]

I solution that I found out to be working is to start by setting them up to some "empty" or "null" equivalent result and then override them with the conditional task. it's not very neat, but if you can define a null result, it might work for you.

[terrytangyuan]

You can assign a default value in valueFrom.default and then check whether your parameter value is the default.

      parameters:
      - name: hello-param
        valueFrom:
          default: "Foobar"
          path: /tmp/hello_world.txt