oracle自定义函数身份证15位和18位的转换

CREATE OR REPLACE Function IDCARD15TO18(CARD Varchar2) Return Varchar2 Is
    Type TIARRAY Is Table Of Integer;
    Type TCARRAY Is Table Of Char(1);
    RESULTS Varchar2(18);
    W       TIARRAY; --数字数组
    A       TCARRAY; --字符数组
    S       Integer;
Begin
    If CARD Is Null Then
        Return '';
    End If;
    If LENGTH(CARD) <> 15 Then
        Return CARD;
    End If;
    W       := TIARRAY(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1);
    A       := TCARRAY('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
    RESULTS := SUBSTR(CARD, 1, 6) || '19' || SUBSTR(CARD, 7, 9);
    S       := 0;
    Begin
        For I In 1 .. 17 Loop
            S := S + To_Number(SUBSTR(RESULTS, I, 1)) * W(I);
        End Loop;
    Exception
        When Others Then
            Return '';
    End;
    S       := S Mod 11;
    RESULTS := RESULTS || A(S + 1);
    Return(RESULTS);
End IDCARD15TO18;

　　

CREATE OR REPLACE Function IDCARD18TO15(CARD Varchar2) Return Varchar2 Is

    RESULTS Varchar2(18);
Begin
    If CARD Is Null Then
        Return '';
    End If;
    If LENGTH(CARD) <> 18 Then
        Return CARD;
    End If;
    RESULTS := substr(CARD,1,6)||substr(CARD,9,9);
    Return(RESULTS);
End IDCARD18TO15;