0

可能重复：
没有游标的存储过程

如何在没有光标的情况下编写以下 sp？更重要的是它没有给我想要的输出。我没有写这个，我试图解释这有什么问题。

ALTER PROCEDURE [dbo].[AccreditationExpiryCheck]
AS
BEGIN
    SET NOCOUNT ON;

    declare @taskTypeId int = 19 -- Accreditations, automated
    declare @firstActionTypeId int = 23 -- Accreditation expiring
    declare @nextActionTypeId int = 3 -- Call company

    declare @companyId int
    declare @accreditationId int
    declare @comment nvarchar(max) = N' accreditation for this company has expired.'

    -- find all companies and accreditations expiring
    declare companies cursor local forward_only read_only for 
        select c.Company_Id, a.Accred_ID
        from COMPANY c
            inner join MEMBERSHIP m on c.Company_ID = m.Company_ID
            inner join ACCREDITATION a on c.Company_ID = a.Company_ID
        where
            -- Accreditation expired yesterday
            cast(a.Accred_ExpDate as DATE) = cast(DATEADD(DAY, -1, GETDATE()) as DATE)
            and m.IsMember_Ind = 1
            and (c.HQ_ID IS NULL OR c.HQ_ID = c.Company_ID)  -- FB4640: this isn't a 'team' co (with an HQ)
            -- and there is no action of this type created within 1 day
            -- of the expiry date
            and not exists (
                select * from TaskAction ta where
                    ta.FirstActionTypeId = @firstActionTypeId and
                    ta.TaskTypeId = @taskTypeId and
                    ta.TaskCreatedOn BETWEEN a.Accred_ExpDate AND DATEADD(DAY, 1, a.Accred_ExpDate) and
                    ta.EntityId = c.Company_ID and 
                    ta.EntityTypeId = 1 )

    open companies

    fetch next from companies into @companyId, @accreditationId

    declare @title nvarchar(max) = 
        (select AccredType_Name from ACCREDITATION_TYPE at 
        inner join ACCREDITATION a on at.AccredType_ID = a.AccredType_ID
        where a.Accred_ID = @accreditationId)

    declare @comment2 nvarchar(max) = isnull(@title, '') + ' accreditation for this company has expired.'
    while @@FETCH_STATUS = 0
    begin
        exec CreateSystemTask 
            @taskTypeId, 
            @firstActionTypeId,
            @nextActionTypeId,
            @companyid,
            @comment2,
            @title

        fetch next from companies into @companyId,@accreditationId
    end

    close companies
    deallocate companies
END

上面 sp 中的以下 select 语句为我提供了正确的数据集，但循环的光标给了我不同的输出。

select c.Company_Id, a.Accred_ID
        from COMPANY c
            inner join MEMBERSHIP m on c.Company_ID = m.Company_ID
            inner join ACCREDITATION a on c.Company_ID = a.Company_ID
        where
            -- Accreditation expired yesterday
            cast(a.Accred_ExpDate as DATE) = cast(DATEADD(DAY, -1, GETDATE()) as DATE)
            and m.IsMember_Ind = 1
            and (c.HQ_ID IS NULL OR c.HQ_ID = c.Company_ID)  -- FB4640: this isn't a 'team' co (with an HQ)
            -- and there is no action of this type created within 1 day
            -- of the expiry date
            and not exists (
                select * from TaskAction ta where
                    ta.FirstActionTypeId = @firstActionTypeId and
                    ta.TaskTypeId = @taskTypeId and
                    ta.TaskCreatedOn BETWEEN a.Accred_ExpDate AND DATEADD(DAY, 1, a.Accred_ExpDate) and
                    ta.EntityId = c.Company_ID and 
                    ta.EntityTypeId = 1 )
4

1 回答 1

0

您可以使用 while 循环摆脱光标，如下图所示。如果您查询的数据包含一个唯一标识符，您可以取消临时表，但对于您的示例，我使用了一个临时表并包含了一个 recordId。

ALTER PROCEDURE [dbo].[AccreditationExpiryCheck] 
AS 
BEGIN 
    SET NOCOUNT ON; 

    declare @taskTypeId int = 19 -- Accreditations, automated 
    declare @firstActionTypeId int = 23 -- Accreditation expiring 
    declare @nextActionTypeId int = 3 -- Call company 

    declare @companyId int 
    declare @accreditationId int 
    declare @comment nvarchar(max) = N' accreditation for this company has expired.'

    -- find all companies and accreditations expiring 
    select ROW_NUMBER() OVER(ORDER BY c.Company_Id, a.Accred_ID) as [RecordId], c.Company_Id as [Company_Id], a.Accred_ID as [Accred_ID]
    into #COMPANIES
        from COMPANY c 
            inner join MEMBERSHIP m on c.Company_ID = m.Company_ID 
            inner join ACCREDITATION a on c.Company_ID = a.Company_ID 
        where 
            -- Accreditation expired yesterday 
            cast(a.Accred_ExpDate as DATE) = cast(DATEADD(DAY, -1, GETDATE()) as DATE) 
            and m.IsMember_Ind = 1 
            and (c.HQ_ID IS NULL OR c.HQ_ID = c.Company_ID)  -- FB4640: this isn't a 'team' co (with an HQ) 
            -- and there is no action of this type created within 1 day 
            -- of the expiry date 
            and not exists ( 
                select * from TaskAction ta where 
                    ta.FirstActionTypeId = @firstActionTypeId and 
                    ta.TaskTypeId = @taskTypeId and 
                    ta.TaskCreatedOn BETWEEN a.Accred_ExpDate AND DATEADD(DAY, 1, a.Accred_ExpDate) and 
                    ta.EntityId = c.Company_ID and  
                    ta.EntityTypeId = 1 )

    declare @recordId int = 0;
    declare @title nvarchar(max);
    declare @comment2 nvarchar(max);

    while(1=1)
        begin
            select top 1 @recordId = [RecordId]
                        ,@companyId = [CompanyId]
                        ,@accreditationId = [Accred_ID]
            from #COMPANIES
            where [RecordId] > @recordId

            if @@ROWCOUNT = 0 break;

            set @title =  
                (select AccredType_Name from ACCREDITATION_TYPE at  
                inner join ACCREDITATION a on at.AccredType_ID = a.AccredType_ID 
                where a.Accred_ID = @accreditationId) 

            set @comment2 = isnull(@title, '') + ' accreditation for this company has expired.' 

                exec CreateSystemTask  
                    @taskTypeId,  
                    @firstActionTypeId, 
                    @nextActionTypeId, 
                    @companyid, 
                    @comment2, 
                    @title        
        end 

    drop table #COMPANIES 
END
于 2012-08-16T15:58:22.747 回答