Validate Alpha Numeric Variable .

[Former Member]

i have a company variable and i need to validate it  with all abcde...z and 1234567890 .

and i know only one procedure to do this :

if v_comp co 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789''

is there any other way to do in void hard code ??

[Former Member]

Hello,

For the A to Z part u can use the system variable SY-ABCDE.

data g_var type string.

g_var = 'A0131V'.

IF g_var ca sy-abcde and g_var ca '0123456789'.

   write 'Alphanumeric'.

ENDIF.

Thanks and Kind Regards,

Yovish.

[Former Member]

can you come up with example that includes 1234567890

[Former Member]

Is this example you are refering to?

A1234567890

Result : Alphanumeric

[former_member209120]

Hi Praveen Bindla

Try like this

PARAMETERS : p_data TYPE string.

IF p_data CO '0123456789'.
   WRITE: 'NUMERIC ONLY'.
ELSEIF p_data CO sy-abcde.
   WRITE: 'ALPHABETS ONLY'.
ELSE.
   WRITE: 'ALPHANUMERIC'.
ENDIF.

[Former Member]

The last else statement can include 'space' special symbol ?

[Former Member]

Hi,

  Please check this..

You can use the RegEx '[[:punct:]]' to achieve this requirement:

1. PARAMETERS: p_data TYPE c LENGTH 10 OBLIGATORY. 
2.  
3. AT SELECTION-SCREEN ON p_data. 
4.    FIND FIRST OCCURRENCE OF REGEX `[[:punct:]]` IN p_data. 
5.    IF sy-subrc = 0. "Special character is found 
6.      MESSAGE 'Please input alphanumeric values only' TYPE 'E'. 
7.    ENDIF. 

[Former Member]

Hi kusuma ,

am in a class method , the code is in method ,

can u tell with an example .

[Former Member]

Regex can be used. ALNUM stands for alpha-numeric character. Sy-subrc will be zero if string has only alpha-numeric characters.

FIND REGEX '^[[:alnum:]]+$' IN v_comp.

Message was edited by: Manish Kumar

[Former Member]

i have given your same code and executed and given 'a234' as input , but sy-subrc is '4' ..

[Former Member]

The code works for string type.

Your variable is probably of char type, which means trailing spaces, which means you need to search for alpha-numeric, followed by any number of spaces.

DATA v_comp TYPE char10 VALUE 'a123'.
DATA v_comp_str TYPE string VALUE 'a123'.

FIND REGEX '^[[:alnum:]]+$' IN v_comp_str.
WRITE:/ sy-subrc.
FIND REGEX '^[[:alnum:]]+$' IN v_comp.
WRITE:/ sy-subrc.
FIND REGEX '^[[:alnum:]]+\s*$' IN v_comp.
WRITE:/ sy-subrc.

[SuhaSaha]

FIND REGEX '^[[:alnum:]]+$' IN v_comp.

Why do you negate the alpha numeric([[:alnum:]]) character set? The OP wants to check if the input string is alpha-numeric.

I'm a novice in RegEx but i think the following construct looks for aplhanumeric correctly -

Message was edited by: Suhas Saha

Stupid me! Moday afternoon blues

BR,

Suhas

[Former Member]

Hi Suhas

When ^ is used with character set [ ], it works as negation.

When ^ is used at start of pattern, it means start of line.

$ at end of pattern means end of line.

Instead of matching pattern with any substring, I am matching the pattern with full input string by specifying start and end of line.

So, [[:alnum:]] matches any alpha-numeric character, and FIND REGEX means find first occurrence. Your construct with get successful match as 'a', irrespective of subsequent characters. For example gv_compare = 'a123%' will get positive match.

I have checked for 'contains only' by specifying ^ and $.

[SuhaSaha]

Please check the update

[Former Member]

Saw the update right after hitting save button.

Too bad SCN does not show warning that stuff you are replying to has changed.

GMail does alert the user when new email in same thread arrives while drafting a reply.

Even better would be show popup to user saying, 'Hey, you are too slow. 4 new replies came in from the moment you started drafting this lengthy reply ', and one of the buttons would say 'Continue anyways, I don't care'.

[SuhaSaha]

I should have checked once before replying I don't use RegEx regularly & hence tend to forget the syntax.

- Suhas

[Former Member]

Hello manish ,

                it worked . good solution man .

Thanks .

[Former Member]

Hi techies,

Am concatenating sy abcde  and '0123456789' to var .

And using 'co' to compare it with company code.

So as of now it's comparing correctly.

But manish can you be clear in explaining Regex concept .

Am very new to concept what said.

I want to use your Regex way..

Thanks...

[arindam_m]

Hi,

Check program 'DEMO_REGEX_TOY' should help you get a fair idea and play around with REGEX.

Cheers,

Arindam

[Former Member]

This message was moderated.

[Former Member]

Hi Praveen,

I wonder why this solution that I had posted before was rejected.

If you want to acheive this using REGEX command, use one of the following statement. Both will work fine.

FIND REGEX '[^[:alnum:]]' IN input.

or

FIND REGEX '[^A-Za-z0-9]+' IN input.

IF sy-subrc = 0.
   WRITE 😕 'Not alphanumeric ' .
ELSE.
   WRITE 😕 'Alphanumeric'.
ENDIF.

[Former Member]

if sy-subrc = 0 . then it should be alpha neumaric right ?

and if sy-subrc neq 0 then its not alpha neumaric ?

[Former Member]

No, its the way I have written.

If sy-subrc = 0 , it means that it has come across some character that is not alphanumeric.

if sy-subre ne 0, it means it has not found any character that is not alphanumeric. Hence its an alphanumeric string.

[Former Member]

Hi sushmitha ,

i have checked ur code , but it is always showing the sy=subrc as 0

either for alpha neumaric or non alpha neumaric .

i have given input as 'A1234' and '@1234' for both cases it was giving sy-subrc = 0 .

FYI : my input is char type .

[Former Member]

Well, this is my complete code. And its always working correctly for me whichever statement I use. FIND REGEX '[^[:alnum:]]' IN input or  FIND REGEX '[^A-Za-z0-9]+' IN input.

DATA : input TYPE  string.

input = 'a234a%##y4'.

WRITE 😕 input.
FIND REGEX '[^[:alnum:]]' IN input.
*FIND REGEX '[^A-Za-z0-9]+' IN input.

IF sy-subrc = 0.
   WRITE 😕 'Not alphanumeric ' .
ELSE.
   WRITE 😕 'Alphanumeric'.
ENDIF.

Output on changing the value of input

Note : Data type is string. 

[Former Member]

Instead of Char Type use String Type .

PARAMETERS: input type string .

FIND REGEX '[^A-Za-z0-9]+' IN input.

IF sy-subrc = 0.

    WRITE :/ 'Not alphanumeric ' .

ELSE.

    WRITE :/ 'Alphanumeric'.

ENDIF.

Regard's

Smruti

[Former Member]

Cheers ,

urs is working only for string type .

but what if my input is char type ?

[Former Member]

If you are using char type, then there is a small change to the regex.

FIND REGEX '[^[:alnum:]\s]' IN input.

or

FIND REGEX '[^A-Za-z0-9\s]+' IN input.

[Former Member]

Again cheers sushmitha ,

its working .

[Former Member]

if u dont mind can you explain me .

see REGEX checks for a-z or 0-9 in input then if it finds then sysubrc should 0 .

and if it finds special character then it should ne 0 .

but in ur case its vice versa ?

[Former Member]

'[^A-Za-z0-9]+'

This character ^ is the negation of a value set.

So when ^ is added to the expression, it will find a character that is not in A-Z, a-z, 0-9.

The search is for any character outside this set. So when it comes across one such character, sy-subrc becomes 0 and you know that its not alphanumeric.

If sy-subrc ne 0, it means the regex could not find any character that is not in the given set, hence its purely alphanumeric.

Hope its clear now. 🙂

[Former Member]

Perfect and thanks..

[AkankshaWagh]

It is giving sy-subrc = 4 for both alpahnumeric and non-alphanumeric values.

[Former Member]

Hi,

Check 'NUMERIC_CHECK' function

[Former Member]

You can use the FM CONVERSION_EXIT_ALFAN_INPUT.

This would give an error if any special character is entered, only alphabets, numbers and underscore is allowed.

[Former Member]

Susmitha,

But he will got error by using this FM if his string or variable contains any space or invalid char.

Regards

Vivek

[Former Member]

Hello manish ,

i checked your solution , it worked .

Thanks ..