4

I am developing a system for scheduling task & I am following Microsoft SQL agent approach to schedule task. I have replicated sysschedules table for capturing users scheduling occurrences and timings. Now I need to know how SQL Server get the Next_run_date and time from this table.

I have found solution on internet which are using sysjobhistory table to get the next run date, but in my case I have only sysschedules table. So, what is the formula to calculate the next_run_date and time for any job.

Note: I am not looking for entire code, concept/algorithm will work for me.

0

1 Answer 1

2

In the dbo.sysschedules table you will see all of the data needed to calculate the schedules.

The columns named active_* delimit the periods in which the jobs can run.

The columns named freq_* define the frequency of the job runs. You will notice a freq_type, which defines a type of frequency, which drives how the freq_interval and other columns are interpreted.

Please read the definitions at: http://msdn.microsoft.com/en-us/library/ms178644.aspx

EDIT: You can calculate the next_run_datetime by using one of the following:

sp_help_jobschedule @job_name = 'Jobname'
sp_help_jobschedule @job_id= '<job id guid>'

Since there can be several schedules you can also use the schedule_id as such:

sp_help_jobschedule @schedule_id = 1, @job_name = 'Jobname'

This will return a data set in which the last columns give the data, such as:

next_run_date   next_run_time   schedule_uid                             job_count
20141110        190000          301DC5D5-9569-49FA-8BC5-9129109AFA6A     1

And you can script out the msdb procedure sp_help_jobschedule to see the code in the procedure, in case you want to include some of that in your own script.

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.