SQL 2005身份证函数包含验证和15位转18位

SELECT
[姓名]
,[身份证号]
,b.*
FROM [EmployeeWorks].[Base].[职员] 
CROSS APPLY [LzmTWWorks].[Helper].[IDCard](身份证号) b
WHERE NOT [身份证号] IS NULL AND Valid = 0

USE [LzmTWWorks]
GO
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [Helper].[IDCard] 
(
    @Card    varchar(18)
)
RETURNS 
@TCard TABLE 
(
     Input    varchar(18)
    ,IDCard    varchar(18)
    ,Sex    bit
    ,Birthday varchar(8)
    ,Region    varchar(6)
    ,RegionName nvarchar(50)
    ,RegionFullName nvarchar(100)
    ,Valid    bit
)
AS
BEGIN
    DECLARE    
             @Input        varchar(18)
            ,@IDCard    varchar(18)
            ,@Sex        bit
            ,@Birthday    varchar(8)
            ,@Region    varchar(6)
            ,@RegionName varchar(50)
            ,@RegionFullName varchar(100)
            ,@Valid        bit

    DECLARE     
             @Length    as smallint
            ,@TmpCard    as varchar(18)
            ,@IsOld        as bit

    SET @Valid = 0
    SET @IDCard = ''
    SET @Input = ''

    IF @Card IS NULL GOTO Finish

    SET @Input = LTRIM(RTRIM(@Card)) /*去空格*/
    SET @Length = LEN(@Input)

    IF NOT @Length IN (15, 18) GOTO Finish /*非15、18位*/

    IF @Length = 15
        BEGIN
            IF ISNUMERIC(@Input) = 0 GOTO Finish /*非数字*/
            SET @TmpCard = LEFT(@Input, 6) + '19' + RIGHT(@input, 9) /*补充为17位*/
            SET @IsOld = 1
        END
    ELSE
        BEGIN
            IF ISNUMERIC(LEFT(@Input, 17)) = 0 GOTO Finish /*非数字*/
            SET @TmpCard = LEFT(@Input, 17) /*取前17位*/
            SET @IsOld = 0
        END

    SET @Birthday = SUBSTRING(@TmpCard, 7, 8)
    IF ISDATE(@birthday) = 0 GOTO Finish /*非日期*/

    --前17位数与相应加权因子的积的和
    DECLARE 
             @Sum as smallint
            ,@WI as tinyint
            ,@Index as tinyint
            ,@Num as tinyint

    SET @Sum = 0
    SET @Index = 1

    WHILE @Index < 18
        BEGIN
            SET @Num = CAST(SUBSTRING(@TmpCard, @Index, 1) AS tinyint)

            SELECT @WI =
                CASE @Index
                    WHEN 1 THEN 7
                    WHEN 2 THEN 9
                    WHEN 3 THEN 10
                    WHEN 4 THEN 5
                    WHEN 5 THEN 8
                    WHEN 6 THEN 4
                    WHEN 7 THEN 2
                    WHEN 8 THEN 1
                    WHEN 9 THEN 6
                    WHEN 10 THEN 3
                    WHEN 11 THEN 7
                    WHEN 12 THEN 9
                    WHEN 13 THEN 10
                    WHEN 14 THEN 5
                    WHEN 15 THEN 8
                    WHEN 16 THEN 4
                    WHEN 17 THEN 2
                END

            SET @Sum = @Sum + @Num * @WI
            SET @Index = @Index + 1
        END

    --模11
    DECLARE @Mod as tinyint
    SET @Mod = @Sum % 11

    --校验码
    DECLARE @Parity as varchar(1)
    SELECT @Parity =
        CASE @Mod
            WHEN 0 THEN '1'
            WHEN 1 THEN '0'
            WHEN 2 THEN 'X'
            WHEN 3 THEN '9'
            WHEN 4 THEN '8'
            WHEN 5 THEN '7'
            WHEN 6 THEN '6'
            WHEN 7 THEN '5'
            WHEN 8 THEN '4'
            WHEN 9 THEN '3'
            WHEN 10 THEN '2'
        END

    --完整的18位身份证号码
    SET @TmpCard = @TmpCard + @Parity

    IF @IsOld = 1
        SET @Valid = 1
    ELSE 
        IF @Parity = RIGHT(@Input, 1) /*校验*/
            SET @Valid = 1

    --无论正确与否，都给出有效身份证号码
    SET @IDCard = @tmpCard

    --取其它信息
    SET @Sex = SUBSTRING(@tmpCard, 17, 1) % 2

    SET @Region = SUBSTRING(@tmpCard, 1, 6)

    SELECT 
         @RegionName = [Name]
        ,@RegionFullName = [Full]
    FROM [Helper].[RegionCodeFullName](Default, @Region) 
    /*从最新版本数据中取区域信息*/

    IF @RegionName IS NULL
    BEGIN
   DECLARE @FirstDate varchar(8) 
/*第一代身份证的区划码，目前很多已经不在使用。
所以，需要从最旧版本的数据中取区域信息*/

        SELECT @FirstDate = MIN(FirstDate) 
        FROM [Private].[RegionCode]    
    
        SELECT 
             @RegionName = [Name]
            ,@RegionFullName = [Full]
        FROM [Helper].[RegionCodeFullName](
             @FirstDate
            ,@Region)    
    END

Finish:
    INSERT INTO @TCard 
    VALUES( 
         @Input
        ,@IDCard
        ,@Sex
        ,@Birthday
        ,@Region
        ,@RegionName
        ,@RegionFullName
        ,@Valid)    
    RETURN 
END

SELECT * FROM [LzmTWWorks].[Helper].[IDCard] ('110116200808080010')

/*
Input            IDCard   Sex   Birthday Region RegionName   RegionFullName    Valid
---------- ----------- ---- ----- -------- ------ ------------ ------------ -----
110116200808080010 110116200808080014 1     20080808 110116 宽城区  长春市宽城区    0

*/