Declaring a variable based on the value of other variable

[Former Member]

Hi,

I need to declare a variable with reference to the value got from another variable.

Ex: var1 type string.

so, the value optained in var1 is '10'. Based on this value, i need to declare a variable of type CHAR with length equal to the value got in the var1.

i.e. var2 TYPE CHAR10. This 10 is the value got in var1.

I need the var2 in only CHAR format but not in any other format.

Is this possible.

Thanks

rohith

Edited by: Rob Burbank on Nov 16, 2009 9:44 AM

[Former Member]

Hi,

I need to declare a variable with reference to the value got from another variable.

Ex: var1 type string.

so, the value optained in var1 is '10'. Based on this value, i need to declare a variable of type CHAR with length equal to the value got in the var1.

i.e. var2 TYPE CHAR10. This 10 is the value got in var1.

I need the var2 in only CHAR format but not in any other format.

Is this possible.

Thanks

rohith

Edited by: Rob Burbank on Nov 16, 2009 9:44 AM

[kesavadas_thekkillath]

define declare.

data:var1(&1) type c.

end-of-definition.

declare 10.

var1 = '1234567890'.

write var1.

[SuhaSaha]

Hello,

You can make use of the method GET_C of the RTTS class CL_ABAP_ELEMDESCR for this:

PARAMETER: P_LEN TYPE I OBLIGATORY.

DATA:
ELEM_TYPE TYPE REF TO CL_ABAP_ELEMDESCR,
DREF      TYPE REF TO DATA.

FIELD-SYMBOLS: <DYN> TYPE ANY.

TRY.
    CALL METHOD CL_ABAP_ELEMDESCR=>GET_C
      EXPORTING
        P_LENGTH = P_LEN
      RECEIVING
        P_RESULT = ELEM_TYPE.
  CATCH CX_PARAMETER_INVALID_RANGE .
ENDTRY.

CREATE DATA DREF TYPE HANDLE ELEM_TYPE.

ASSIGN DREF->* TO <DYN>.

<DYN> = '1234567890'.

WRITE: <DYN>.

@Keshu: I did not know you can use macros for this Anyways i am always skeptical about using them !!

BR,

Suhas

[vinod_vemuru2]

Hi Rohith,

Why can't you use field symbols. Just check below example.

FIELD-SYMBOLS: <fs_var> TYPE ANY.
DATA: l_num TYPE n VALUE '1',
      l_char TYPe c VALUE 'X'.

ASSIGN l_num TO <fs_var>.
WRITE <fs_var>.

UNASSIGN <fs_var>.
ASSIGN l_char TO <fs_var>.
WRITE <fs_var>.

Field symbols works not only for length but you can assign data type also dynamically.

thanks,

Vinod.

[SuhaSaha]

>

> Field symbols works not only for length but you can assign data type also dynamically.

Hello Vinod,

You should rather add 'generically typed' field-symbol to your statement.

Also in the method you have suggested the field-symbol is of generic type, it can hold ANY type of data (I, P, N, D etc.)

If you use the RTTS method to assign the data object to your generic field symbol, the field symbol actually references the characteristics of the data object.

In the code i have suggested reduce the value of P_LEN & see the difference.

Hope i am clear.

BR,

Suhas

[Former Member]

Hi Suhas,

thanx for the solution..

Now, the point is like i need to declare an internal table based on this P_RESULT.

As per the below code, i can create a work area but not the internal table

CREATE DATA DREF TYPE HANDLE ELEM_TYPE.

ASSIGN DREF->* TO <DYN>...

I tried to create it but error says that ASSIGN_TYPE_CONFLICT..

Any help plz..

Thanks

rohith