Dynamic declaration for variable.

Question

Can we declare a variable dynamic with varing data type.
My req is i have to define a variable to store output from a dynamic select statement. Now since SELECT is dynamic, its output type changes each time and for the same I need a variable defined dynamically.
Regards,
Arpit

Answer 1

Hi Arpit Gattani,
    To store output of an dynamic Select statement you can use dynamic data objects and field symbols.
    To create a data object dynamically during a program, you need a data reference variable and the following statement:
CREATE DATA <dref> TYPE <type>|LIKE <obj>.
This statement creates a data object in the internal session of the current ABAP program. After the statement, the data reference in the data reference variable <dref> points to the object. The data object that you create does not have its own name. You can only address it using a data reference variable. To access the contents of the data object, you must dereference the data reference.
You must specify the data type of the object using the TYPE or LIKE addition. In the TYPE addition, you can specify the data type dynamically as the contents of a field (this is not possible with other uses of TYPE).
CREATE DATA <dref> TYPE (<name>).
Here, <name> is the name of a field that contains the name of the required data type.
<b>Example:</b>
A specific field is read from database table X031L. Neither the field name nor the table name is known until runtime:
Read a field from the table X031L
PARAMETERS:
  TAB_NAME    LIKE SY-TNAME,           "Table name
  TAB_COMP    LIKE X031L-FIELDNAME,   "Field name
  ANZAHL      TYPE I DEFAULT 10.       Number of lines
FIELD-SYMBOLS: <WA>   TYPE ANY,
               <COMP> TYPE ANY.
  DATA: WA_REF TYPE REF TO DATA.
  CREATE DATA WA_REF TYPE (TAB_NAME). "Suitable work area
  ASSIGN WA_REF->* TO <WA>.
SELECT * FROM (TAB_NAME) INTO <WA>
  UP TO anzahl ROWS.
  WRITE: / TAB_COMP, <COMP>.
  ENDSELECT.
Dont Forget to give points if it helps ;>)
Regards
Rakesh.