SQL Server 验证身份证合法性函数（使用VBScript.RegExp）

原文:SQL Server 验证身份证合法性函数（使用VBScript.RegExp）

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-- 建立正则表达式测试函数
CREATE FUNCTION dbo.RegExpTest
    (
      @source VARCHAR(5000),   --需要匹配的源字符串
      @regexp VARCHAR(1000),  --正则表达式
      @ignorecase BIT = 0  --是否区分大小写，默认为false
    )
RETURNS BIT  --返回结果0-false，1-true
AS BEGIN  

 --0（成功）或非零数字（失败），是由 OLE 自动化对象返回的 HRESULT 的整数值。
    DECLARE @hr INTEGER  

--用于保存返回的对象令牌，以便之后对该对象进行操作
    DECLARE @objRegExp INTEGER
    DECLARE @objMatches INTEGER  

--保存结果
    DECLARE @results BIT  

/*
创建 OLE 对象实例,只有 sysadmin 固定服务器角色的成员才能执行 sp_OACreate,并确定机器中有VBScript.RegExp类库
*/
    EXEC @hr = sp_OACreate 'VBScript.RegExp', @objRegExp OUTPUT
    IF @hr <> 0
        BEGIN
            SET @results = 0
            RETURN @results
        END
/*
以下三个分别是设置新建对象的三个属性。下面是'VBScript.RegExp'中常用的属性举例：
    Dim regEx,Match,Matches         '建立变量。
    Set regEx = New RegExp         '建立一般表达式。
    regEx.Pattern= patrn         '设置模式。
    regEx.IgnoreCase = True         '设置是否区分大小写。
    regEx.Global=True                             '设置全局可用性。
    set Matches=regEx.Execute(string)             '重复匹配集合
    RegExpTest = regEx.Execute(strng)      '执行搜索。
   for each match in matches                    '重复匹配集合
   RetStr=RetStr &"Match found at position "
   RetStr=RetStr&Match.FirstIndex&".Match Value is '"
   RetStr=RetStr&Match.Value&"'."&vbCRLF Next
   RegExpTest=RetStr  

*/
    EXEC @hr = sp_OASetProperty @objRegExp, 'Pattern', @regexp
    IF @hr <> 0
        BEGIN
            SET @results = 0
            RETURN @results
        END
    EXEC @hr = sp_OASetProperty @objRegExp, 'Global', false
    IF @hr <> 0
        BEGIN
            SET @results = 0
            RETURN @results
        END
    EXEC @hr = sp_OASetProperty @objRegExp, 'IgnoreCase', @ignorecase
    IF @hr <> 0
        BEGIN
            SET @results = 0
            RETURN @results
        END
--调用对象方法
    EXEC @hr = sp_OAMethod @objRegExp, 'Test', @results OUTPUT, @source
    IF @hr <> 0
        BEGIN
            SET @results = 0
            RETURN @results
        END
--释放已创建的 OLE 对象
    EXEC @hr = sp_OADestroy @objRegExp
    IF @hr <> 0
        BEGIN
            SET @results = 0
            RETURN @results
        END
    RETURN @results
   END  

-- 建立身份证验证函数
ALTER  FUNCTION dbo.fn_checkidcard ( @p_idcard VARCHAR(18) )
RETURNS INT
AS BEGIN
    DECLARE @v_regstr VARCHAR(2000) ;
    DECLARE @v_sum INT ;
    DECLARE @v_mod INT ;
    DECLARE @v_checkcode CHAR(11) ;
    SET @v_checkcode = '10X98765432' ;
    DECLARE @v_checkbit CHAR(1) ;
    DECLARE @v_areacode VARCHAR(2000) ;
    SET @v_areacode = '11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,44,45,46,50,51,52,53,54,61,62,63,64,65,71,81,82,91,' ;  

    DECLARE @l INT ;
    SET @l = LEN(@p_idcard) ;  

    DECLARE @r INT ;
    SET @r = 0 ;  

    IF @l = 15
        BEGIN
            IF CHARINDEX(SUBSTRING(@p_idcard, 1, 2) + ',', @v_areacode) = 0
                RETURN 0 ;  

            IF ( ( CAST(( SUBSTRING(@p_idcard, 6, 2) ) AS INT) + 1900 ) % 400 = 0 )
                OR ( ( ( CAST(( SUBSTRING(@p_idcard, 6, 2) ) AS INT) + 1900 )
                       % 100 <> 0 )
                     AND ( ( CAST(( SUBSTRING(@p_idcard, 6, 2) ) AS INT)
                             + 1900 ) % 4 = 0 )
                   )
                SET @v_regstr = '^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$' ;
            ELSE
                SET @v_regstr = '^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$' ;                    

            IF dbo.RegExpTest(@p_idcard, @v_regstr, 0) = 1
                SET @r = 1 ;
            ELSE
                SET @r = 0 ;
        END ;
    ELSE
        IF @l = 18
            BEGIN
                IF CHARINDEX(SUBSTRING(@p_idcard, 1, 2) + ',', @v_areacode) = 0
                    RETURN 0 ;  

                IF ( ( CAST(( SUBSTRING(@p_idcard, 6, 4) ) AS INT) + 1900 )
                     % 400 = 0 )
                    OR ( ( ( CAST(( SUBSTRING(@p_idcard, 6, 4) ) AS INT)
                             + 1900 ) % 100 <> 0 )
                         AND ( ( CAST(( SUBSTRING(@p_idcard, 6, 4) ) AS INT)
                                 + 1900 ) % 4 = 0 )
                       )
                    SET @v_regstr = '^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$' ;
                ELSE
                    SET @v_regstr = '^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$' ;  

                IF dbo.RegExpTest(@p_idcard, @v_regstr, 0) = 1
                    BEGIN
                        SET @v_sum = ( CAST(SUBSTRING(@p_idcard, 1, 1) AS INT)
                                       + CAST(SUBSTRING(@p_idcard, 11, 1) AS INT) )
                            * 7 + ( CAST(SUBSTRING(@p_idcard, 2, 1) AS INT)
                                    + CAST(SUBSTRING(@p_idcard, 12, 1) AS INT) )
                            * 9 + ( CAST(SUBSTRING(@p_idcard, 3, 1) AS INT)
                                    + CAST(SUBSTRING(@p_idcard, 13, 1) AS INT) )
                            * 10 + ( CAST(SUBSTRING(@p_idcard, 4, 1) AS INT)
                                     + CAST(SUBSTRING(@p_idcard, 14, 1) AS INT) )
                            * 5 + ( CAST(SUBSTRING(@p_idcard, 5, 1) AS INT)
                                    + CAST(SUBSTRING(@p_idcard, 15, 1) AS INT) )
                            * 8 + ( CAST(SUBSTRING(@p_idcard, 6, 1) AS INT)
                                    + CAST(SUBSTRING(@p_idcard, 16, 1) AS INT) )
                            * 4 + ( CAST(SUBSTRING(@p_idcard, 7, 1) AS INT)
                                    + CAST(SUBSTRING(@p_idcard, 17, 1) AS INT) )
                            * 2 + CAST(SUBSTRING(@p_idcard, 8, 1) AS INT) * 1
                            + CAST(SUBSTRING(@p_idcard, 9, 1) AS INT) * 6
                            + CAST(SUBSTRING(@p_idcard, 10, 1) AS INT) * 3 ;  

                        SET @v_mod = @v_sum % 11 ;
                        SET @v_checkbit = SUBSTRING(@v_checkcode, @v_mod + 1,
                                                    1) ;  

                        IF @v_checkbit = SUBSTRING(@p_idcard, 18, 1)
                            SET @r = 1 ;
                        ELSE
                            SET @r = 0 ;
                    END ;
                ELSE
                    RETURN 0 ;
            END ;
    RETURN @r ;
   -- 身份证号码位数不对
   END ;
;  

-- 开启Ole Automation Procedures配置
EXEC sp_configure 'show advanced options', 1
RECONFIGURE
EXEC sp_configure 'Ole Automation Procedures', 1
RECONFIGURE
EXEC sp_configure 'show advanced options', 0
RECONFIGURE  

-- 测试
SELECT dbo.fn_checkidcard('110102197203270816');  

问题：这种方法对每一行都要创建对象、设置对象属性、释放对象等一系列操作，数据量大时性能很差。但这种在SQL Server中使用正则表达式的方法比较简单。