As you all know, "name" is still not exposed in the CronTrigger table.

The only way to handle this is to store, permanently, the CronTrigger ID as returned by System.schedule:

MyConfigObj__c.CronJobId__c = System.schedule(...);
update MyConfigObj__c;

So you can then delete it by ID.

If you, like us, have a bunch of these in the wild without having stored their ID (b/c it wasn't clear, at first, that System.schedule() returned the CronTrigger ID), then you (like us) will want to delete your old job & reschedule it so you can store the Job ID.

There are two things that can help you do this, even without a CronTrigger.Name field:

1.  If you try to schedule a job w/ the same name, you will get an exception

2.  Your CronExpression may be somewhat unique.

We actually have update code that leverages the above two facts to ensure we delete the old job (if it still exists) and then re-create it and store the Job ID that we get back.

The basic logic is this:  Loop through all jobs whose CronExpression matches yours, delete the candidate job & try to reschedule your job.  If you are able to reschedule, it means you deleted the right one.  If not, you deleted the wrong one and need to rollback your changes.

void rescheduleMyJob() {
  // corner case: it's possible they've already deleted the job by hand b/c they are crazy
  // if so, all we need to do is schedule it
  try {
    scheduleMyJob();
    return; // succeeded = we're done here
    }
  catch (Exception ok) { // prev job still exists in CronTrigger - must loop
    }

  Savepoint nothingDone = null;
  for (CronTrigger t : [select Id, CronExpression from CronTrigger where CronExpression = :myCronExpression order by CreatedDate asc]) {
    try {
       // checkpoint within the loop so we can log in the exception handler
      nothingDone = Database.setSavepoint();

      System.abortJob(t.Id);

      // scheduleMyJob throws Exception if my job still exists in CronTrigger
      scheduleMyJob();
      return; // job is rescheduled! get out!
      }
    catch (Exception e) {
      // can't schedule the job = aborted the wrong job = rollback!
      Database.rollback(nothingDone);
      }
    }
  }
 
void scheduleMyJob() {
  // only works if job "myName" not already scheduled
  MyConfigObj__c.CronJobId__c = System.schedule(myName, myCronExpression, ...);
  update MyConfigObj__c;
  }