Deleting a scheduled Apex job

A framework to allow your classes to not be locked due to being scheduled (Espiecally in a managed package) can be accomplished via the code located here:

https://gist.github.com/gbutt/11151983

Reposting code here (Code written by git use gbutt)

/***
This class can be used to schedule any scheduled job without risk of locking the class.
DO NOT CHANGE THIS CLASS! It is locked by the scheduler. Instead make changes to ScheduledHelper or your own IScheduleDispatched class
To use:
    1) Create a new class to handle your job. This class should implement ScheduledDispatcher.IScheduleDispatched
    2) Create a new instance of ScheduledDispatcher with the type of your new class.
    3) Schedule the ScheduledDispatcher instead of directly scheduling your new class.
    See ScheduledRenewalsHandler for a working example.
***/
global class ScheduledDispatcher implements Schedulable {
    private Type targetType; 

    public ScheduledDispatcher(Type targetType) {
        System.debug('Creating new dispatcher for class: ' + targetType.getName());
        this.targetType = targetType;
    }

    global void execute(SchedulableContext sc) {
        ((IScheduleDispatched)targetType.newInstance()).execute(sc); 
    }


    public interface IScheduleDispatched {
        void execute(SchedulableContext sc);
    }
}

An example class I used to implement it:

public class ScheduledDispatcher Implements Schedulable{


    public Interface IScheduleDispached{
        void execute(SchedulableContext sc);
    }

    public void execute(SchedulableContext sc){

        Type targetType = Type.forName('CLASSNAME');
        if(targetType != null){
            IScheduleDispached obj = (IScheduleDispached)targetType.newInstance();
            obj.execute(sc);
        }
    }



}

You can get this information by querying the CronTrigger and CronJobDetail objects:

SELECT CronJobDetail.Name, CronExpression, OwnerId 
FROM CronTrigger 
WHERE CronJobDetail.JobType = '7'

JobType 7 is Scheduled Apex.

The CronExpression is the critical Cron timing string that you can pass to System.schedule(), which allows for types of schedules that are not supported in the user-interface scheduler; that will let you rebuild the jobs on the same schedule as you expect.

The easiest place I am aware of that you can see the Apex class name, frustratingly, is the job's detail page under Scheduled Jobs in Setup:

You can find Apex class names from the AsyncApexJob object, which represents the queued run of the scheduled job, but I'm not aware of any way other than visual inspection to correlate the AsyncApexJob back to the parent CronTrigger (its ParentJobId is blank). Regardless, you can query

SELECT ApexClass.Name FROM AsyncApexJob WHERE JobType = 'ScheduledApex'

You'll be able to view the actual class code only if it's not part of a managed package.

You can schedule a job programmatically by opening Anonymous Apex in the Developer Console and entering

System.schedule('My Job Name', '0 0 * * * ?', new MySchedulableClass());

The second argument is your CronExpression from the CronTrigger query.