Changing Schedules For A Job Outside SQL Server

Below is the script of a Job called "eFIMS_SendEmail" that I wish to
run. The intention is that every day of the week the job will execute
a SPROC at timed intervals. For example, the SundayRun schedule will
run once every 1 hours from 00:30:00 to 23:59:59

However, the clients have stated that they want an interface to this to
enable them easily to change the start time and frequency interval for
each day. It's an easy matter for me to paint them a form from within
the target application to enable the user to enter the start time and
interval for each day. I can then pass these as parameters to a SPROC.
How can I use these values to change the schedules for the job? For
example, if wanted to change SundayRun from once every 1 hours to once
every 30 mins? I know I could do it the hard way, by using string
manipulation (e.g. find string 'SundayRun', then look for the next
occurrence of @active_start_time, @freq_subday_type,
@freq_subday_interval etc. and do some replacement) but this seems
somewhat tricky.

Many thanks

Edward

-- Script generated on 8/31/2006 9:27 AM
-- By: sa
-- Server: BISMARK

BEGIN TRANSACTION
DECLARE @JobID BINARY(16)
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
IF (SELECT COUNT(*) FROM msdb.dbo.syscategories WHERE name =
N'[Uncategorized (Local)]') < 1
EXECUTE msdb.dbo.sp_add_category @name = N'[Uncategorized (Local)]'

-- Delete the job with the same name (if it exists)
SELECT @JobID = job_id
FROM msdb.dbo.sysjobs
WHERE (name = N'eFIMS_SendEmail')
IF (@JobID IS NOT NULL)
BEGIN
-- Check if the job is a multi-server job
IF (EXISTS (SELECT *
FROM msdb.dbo.sysjobservers
WHERE (job_id = @JobID) AND (server_id <0)))
BEGIN
-- There is, so abort the script
RAISERROR (N'Unable to import job ''eFIMS_SendEmail'' since there
is already a multi-server job with this name.', 16, 1)
GOTO QuitWithRollback
END
ELSE
-- Delete the [local] job
EXECUTE msdb.dbo.sp_delete_job @job_name = N'eFIMS_SendEmail'
SELECT @JobID = NULL
END

BEGIN

-- Add the job
EXECUTE @ReturnCode = msdb.dbo.sp_add_job @job_id = @JobID OUTPUT ,
@job_name = N'eFIMS_SendEmail', @owner_login_name = N'sa', @description
= N'No description available.', @category_name = N'[Uncategorized
(Local)]', @enabled = 0, @notify_level_email = 0, @notify_level_page =
0, @notify_level_netsend = 0, @notify_level_eventlog = 2,
@delete_level= 0
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback

-- Add the job steps
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobstep @job_id = @JobID,
@step_id = 1, @step_name = N'SendEmail', @command = N'EXEC
stpSendEmailConfirmation', @database_name = N'194-eFIMS', @server =
N'', @database_user_name = N'', @subsystem = N'TSQL',
@cmdexec_success_code = 0, @flags = 4, @retry_attempts = 0,
@retry_interval = 1, @output_file_name = N'', @on_success_step_id = 0,
@on_success_action = 1, @on_fail_step_id = 0, @on_fail_action = 2
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_update_job @job_id = @JobID,
@start_step_id = 1

IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback

-- Add the job schedules
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'SundayRun', @enabled = 1, @freq_type = 8, @active_start_date
= 20060831, @active_start_time = 3000, @freq_interval = 1,
@freq_subday_type = 8, @freq_subday_interval = 1,
@freq_relative_interval = 0, @freq_recurrence_factor = 1,
@active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'MondayRun', @enabled = 1, @freq_type = 8, @active_start_date
= 20060831, @active_start_time = 3000, @freq_interval = 2,
@freq_subday_type = 4, @freq_subday_interval = 30,
@freq_relative_interval = 0, @freq_recurrence_factor = 1,
@active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'TuesdayRun', @enabled = 1, @freq_type = 8, @active_start_date
= 20060831, @active_start_time = 4000, @freq_interval = 4,
@freq_subday_type = 4, @freq_subday_interval = 40,
@freq_relative_interval = 0, @freq_recurrence_factor = 1,
@active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'WednesdayRun', @enabled = 1, @freq_type = 8,
@active_start_date = 20060830, @active_start_time = 3000,
@freq_interval = 8, @freq_subday_type = 4, @freq_subday_interval = 30,
@freq_relative_interval = 0, @freq_recurrence_factor = 1,
@active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'ThursdayRun', @enabled = 1, @freq_type = 8,
@active_start_date = 20060831, @active_start_time = 3500,
@freq_interval = 16, @freq_subday_type = 4, @freq_subday_interval = 35,
@freq_relative_interval = 0, @freq_recurrence_factor = 1,
@active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'FridayRun', @enabled = 1, @freq_type = 8, @active_start_date
= 20060831, @active_start_time = 3000, @freq_interval = 32,
@freq_subday_type = 4, @freq_subday_interval = 30,
@freq_relative_interval = 0, @freq_recurrence_factor = 1,
@active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'SaturdayRun', @enabled = 1, @freq_type = 8,
@active_start_date = 20060831, @active_start_time = 0, @freq_interval =
64, @freq_subday_type = 8, @freq_subday_interval = 1,
@freq_relative_interval = 0, @freq_recurrence_factor = 1,
@active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback

-- Add the Target Servers
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobserver @job_id = @JobID,
@server_name = N'(local)'
IF (@@ERROR <0 OR @ReturnCode <0) GOTO QuitWithRollback

END
COMMIT TRANSACTION
GOTO EndSave
QuitWithRollback:
IF (@@TRANCOUNT 0) ROLLBACK TRANSACTION
EndSave: