EXITS-PARAM in user exit

Question

Hi ,
   When we do substitution in FICO by user exit there are three types of EXITS-PARAM
    EXITS-PARAM = C_EXIT_PARAM_NONE.
    EXITS-PARAM = C_EXIT_PARAM_FIELD
    EXITS-PARAM = C_EXIT_PARAM_CLASS.
   Could you tell me the difference among them? Thanks.

Answer 1

There are three values for this parameter, and are defined as constants:
C_EXIT_PARAM_NONE:
This constant means that no parameters are defined for this user exit. In truth, there is one parameter defined and that is a boolean flag that is used to specify whether there is an error in the data or not. A value of false for this parameter means that the data is valid(!) and a value of true means that there is an error.
This parameter is valid for rules, validations and substitutions.
C_EXIT_PARAM_FIELD:
This constant is valid for substitutions only and means that one parameter can be defined for the user exit which is the field to be sustituted.
C_EXIT_PARAM_CLASS
valid for Rules, Validations and Substitutions, this parameter signifies that all the data (BKPF and BSEG data) will be passed as one parameter to the user exit. You will be passed a table containing all the relevant information. Have a look at the routine U101 to see how to access this data.
The last thing to include before the append is a text sting which is used to display the title of the user exit in an upcoming transaction
===========================================================================
'register' your exit in ZGGBS000, subroutine (FORM) GET_EXIT_TITLES, for example:
exits-name = 'U999'.
exits-param = c_exit_param_field.
exits-title = 'Substitute ZUONR from SGTXT'.
append exits.
Then add the subroutine (FORM) to hold the code:
form U999.
bseg-zuonr = bseg-sgtxt+0(10).
endform.
===========================================================================
===========================================================================
The substitution like this:
BSEG-SGTXT = '' AND BKPF-BLART = 'WE'
Our exit name is U900 and below is the code for the text substitution as
applied in the ABAP:
(in form get_exit_titles:)
exits-name = 'U900'.
exits-param = c_exit_param_none.
exits-title = 'Substitute BSEG-SGTXT with EKPO-TXZ01'.
APPEND exits
===========================================================================
===========================================================================
Substitutions allows you to populate vendor number (BSEG-LIFNR).
Create a STEP for item
The prerequisite:
SYST-TCODE = 'FB60' AND BSEG-KOART = 'S'
Create anx EXIT where you'll create the text for item.
To create the exit: copy the std program RGGBS000 in your ZGGBS000.
Here insert your exit, for example Z001.
So in the routine GET_EXIT_TITLES insert the name of your routine:
FORM get_exit_titles TABLES etab.
exits-name = 'Z001'.
exits-param = c_exit_param_class.
exits-title = 'MY EXIT'.
APPEND exits.
And the define the exit:
FORM z001.
ENDFORM.
Insert the name of your program in the table T80D
===========================================================================
Regards
Venkat