存储过程 游标

CREATE  PROCEDURE [dbo].[RuleExecute_Temp]
AS
declare @executedate varchar(20)
declare @branchcode varchar(50)
declare @rulenumber varchar(50)
declare @number varchar(20)
declare @JLWZCode varchar(20)

declare cur cursor for SELECT ExcuteDate,RuleNumber,BranchCode,number,JLWZCode FROM IM_ReRun where Flag=0
open cur
fetch cur into @executedate,@rulenumber,@branchcode,@number,@JLWZCode
while (@@Fetch_Status=0)
begin    exec RuleExecute @rulenumber,@executedate,'1',@branchcode
         declare cur1 INSENSITIVE SCROLL cursor for select result,occurdate from  dbo.IM_Result where number=@number and BranchCode=@branchcode and seriesID=0 and executedate=@executedate  and rulenumber=@rulenumber
        declare @result varchar(20)
        declare @occurdate varchar(20)
         open cur1
         fetch first from cur1 into @result,@occurdate
    if(@result='正常')
    begin
      declare cur2 INSENSITIVE SCROLL cursor for select ZBcode,ZDcode,chancode,Type,TableSource from dbo.IM_DataSource where number=@number
      declare @ZBcode varchar(20)
      declare @ZDcode varchar(20)
      declare @chanCode varchar(20)
      declare @type varchar(20)
      declare @TableSource varchar(100)
      open cur2
      fetch first from cur2 into @ZBcode,@ZDcode,@chanCode,@type,@TableSource
      declare @datet varchar(20) set @datet='DateYMD'
      if(@type='M')
      begin
       set @datet='DateYM'
       set @occurdate=substring(@occurdate,0,7)
      end
       declare @sql varchar(1000)
       set @sql='update '+@TableSource+' set flag=0 where zbcode='+@ZBcode+' and '+@datet+'='+@occurdate+' and BranchCode='+@JLWZCode+''
       exec(@sql)
      close cur2
      Deallocate cur2
    end
    close cur1
    Deallocate cur1
    update IM_ReRun set Flag=1 where RuleNumber=@rulenumber and BranchCode=@branchcode and ExcuteDate=@executedate
    fetch next from cur into @executedate,@rulenumber,@branchcode,@number,@JLWZCode
end
close cur
Deallocate cur
GO

该存储过程游标内又定义了两个游标cur1和cur2。

并且这两个游标只取select结果的第一行数据。

所以在定义时需要加上“INSENSITIVE SCROLL” scroll表示可随意移动游标指 针（否则只能向前），dynamic表示可以读写游标（否则游标只读）*/  ，不然会报错，错误会提示fetch: 提取类型first不能与只进游标一起使用。