title: Identify if proc B's caller is proc A
body: <p>Is there any way I can know, each time procedure B runs, if it was called by procedure A?</p>
  <p>I don't want to use context_info because it might be used by other procs in the call stack, and I want to avoid SESSION_CONTEXT (althought it seems the better solution) because many of my clients have versions &lt;2016.</p>