数据库触发器和作业结合讲解
/*--作业处理实例  
根据sendTab的SendTime定制作业
并且在该作业完成时,可以自动删除作业
--*/  
--示例  
--测试表
create table sendTab(ID int identity(1,1),Name varchar(10)
,SendTime datetime,AcceptUnit varchar(10)
,SendUnit varchar(10),Content varchar(8000))  
create table accepteTab(ID int identity(1,1),Name varchar(10)
,SendUnit varchar(10),AcceptUnit varchar(10),Content varchar(8000))
go  
--创建处理的
存储
过程
create proc p_JobSet
@id int,  --要处理的sendTab的id
@is_delete bit=0 --是否仅删除,为0则否,为1则是
as
declare @dbname sysname,@jobname sysname
,@date int,@time int  
select @jobname='定时发送作业_' cast(@id as varchar)
,@date=convert(varchar,SendTime,112)
,@time=replace(convert(varchar,SendTime,108),':','')
from sendTab where id=@id  
if exists(select 1 from msdb..sysjobs where name=@jobname)
exec msdb..sp_delete_job @job_name=@jobname  
if @is_delete=1 return  
--创建作业
exec msdb..sp_add_job @job_name=@jobname,@delete_level=1  
--创建作业步骤
declare @sql varchar(800)
select @sql='insert accepteTab(name,SendUnit,AcceptUnit,Content)
  select name,AcceptUnit,SendUnit,Content from sendTab where id='
  cast(@id as varchar)
,@dbname=db_name()  
exec msdb..sp_add_jobstep @job_name=@jobname,
@step_name = '发送处理步骤',
@subsystem = 'TSQL',
@database_name=@dbname,
@command = @sql,
@retry_attempts = 5,  --重试次数
@retry_interval = 5    --重试间隔  
--创建调度
EXEC msdb..sp_add_jobschedule @job_name = @jobname,
@name = '时间安排',
@enabled = 1,
@freq_type = 1,
@active_start_date = @date,
@active_start_time = @time  
-- 添加目标
服务器

EXEC msdb.dbo.sp_add_jobserver
@job_name = @jobname ,
@server_name = N'(local)'
go  
--创建处理的触发器(新增/修改)
create trigger tr_insert_update on sendTab
for insert,update
as
declare @id int
declare tb cursor local for select id from inserted
open tb
fetch next from tb into @id
while @@fetch_status=0
begin
exec p_JobSet @id
fetch next from tb into @id
end
close tb
deallocate tb
go  
--创建处理的触发器(删除)
create trigger tr_delete on sendTab
for delete
as
declare @id int
declare tb cursor local for select id from deleted
open tb
fetch next from tb into @id
while @@fetch_status=0
begin
exec p_JobSet @id,1
fetch next from tb into @id
end
close tb
deallocate tb
go  
--测试  
--插入数据
insert sendTab
select '文书1','2004/5/1 12:00:00','UnitA','UnitB','txt'
union all select '文书2','2004/5/12 12:00:00','UnitA','UnitB','txt'
union all select '文书3','2004/5/21 12:00:00','UnitA','UnitB','txt'  
--修改
update sendTab set name='档案1',SendTime='2004/5/1 15:00:00'
where id=1  
--删除
delete sendtab where id=3
go
--删除测试
drop table sendTab,accepteTab
drop proc p_JobSet