SAP ABAP Change User's Default Parameters

In ABAP, you can set user-specific default parameters using the SAP user-specific parameter setting. Here's a sample ABAP code snippet that demonstrates how to set user default parameters for a specific user.

REPORT z_set_user_defaults.

DATA: lv_username TYPE sy-uname VALUE 'YOUR_USER_NAME',  
      lv_parameter TYPE sy-repid VALUE 'ZUSER_PARAM',
      lv_value TYPE string VALUE 'DEFAULT_VALUE'.

* Check if the user exists
DATA: lt_user TYPE STANDARD TABLE OF s_user,
      lv_user_exists TYPE abap_bool.

CALL FUNCTION 'S_USER_AUTHORITY'
  EXPORTING
    username = lv_username
  TABLES
    user     = lt_user.

READ TABLE lt_user TRANSPORTING NO FIELDS WITH KEY username = lv_username TRANSPORTING NO FIELDS.

IF sy-subrc = 0.
  lv_user_exists = abap_true.

  * Set the user-specific parameter
  CALL FUNCTION 'SET_USER_DEFAULTS'
    EXPORTING
      username     = lv_username
      parameter    = lv_parameter
      parameter_v  = lv_value
      overwrite    = abap_true
    EXCEPTIONS
      others       = 1.

  IF sy-subrc = 0.
    WRITE: 'User-specific default parameter set successfully.'.
  ELSE.
    WRITE: 'Error setting user-specific default parameter.'.
  ENDIF.
ELSE.
  WRITE: 'User', lv_username, 'does not exist.'.
ENDIF.

In this code:

Replace 'YOUR_USER_NAME' with the username for which you want to set the default parameter.

lv_parameter represents the parameter name, and lv_value is the value you want to set as the default for that parameter.

We check if the user exists using the S_USER_AUTHORITY function module.

If the user exists (lv_user_exists is abap_true), we call the SET_USER_DEFAULTS function module to set the user-specific default parameter. The overwrite parameter is set to abap_true to overwrite the parameter if it already exists.

The code then checks the return code (sy-subrc) to determine if the parameter was set successfully or if there was an error.

Please ensure that you have the necessary authorization to modify user-specific parameters, and adapt the code to your specific requirements, such as changing the default parameter name and value.