处理SQLServer作业无法删除的问题

use [msdb]
 
declare @job_name varchar(100)
 
set @job_name = N'正式库每天凌晨3:00第二次完整备份.Subplan_1'
 
--注：job_name为维护计划对应的job name
 
--删除在计划里面的日志
 
delete sysmaintplan_log from sysmaintplan_subplans as subplans
 
inner join sysjobs_view as syjobs on subplans.job_id = syjobs.job_id
 
inner join sysmaintplan_log on subplans.subplan_id =sysmaintplan_log.subplan_id
 
where (syjobs.name = @job_name)
 
--删除代理的作业
 
delete sysjobschedules from sysjobs_view v
 
inner join sysjobschedules o on v.job_id=o.job_id where v.name=@job_name
 
--删除子计划
 
delete sysmaintplan_subplans from sysmaintplan_subplans as subplans
 
inner join sysjobs_view as syjobs on subplans.job_id = syjobs.job_id
 
where (syjobs.name = @job_name)
 
--删除作业
 
delete from msdb.dbo.sysjobs_view where name = @job_name
 
 
--查询有哪些作业
select * from msdb.dbo.sysjobs_view

　　错误现象：delete  语句与 reference 约束"FK_subplan_job_id"冲突。该冲突发生于数据库"msdb"，表"dbo.sysmaintplan_subplans", column 'job_id'。语句已终止。 (Microsoft SQL Server，错误: 547)