ABAP Select data from SAP table MIBDEFAULT_EMPLOYEE_LEAVE_RE12 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MIBDEFAULT_EMPLOYEE_LEAVE_RE12 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to MIBDEFAULT_EMPLOYEE_LEAVE_RE12. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the MIBDEFAULT_EMPLOYEE_LEAVE_RE12 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 TYPE STANDARD TABLE OF MIBDEFAULT_EMPLOYEE_LEAVE_RE12,
      WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 TYPE MIBDEFAULT_EMPLOYEE_LEAVE_RE12,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <MIBDEFAULT_EMPLOYEE_LEAVE_RE12> TYPE MIBDEFAULT_EMPLOYEE_LEAVE_RE12.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MIBDEFAULT_EMPLOYEE_LEAVE_RE12.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MIBDEFAULT_EMPLOYEE_LEAVE_RE12
  INTO TABLE IT_MIBDEFAULT_EMPLOYEE_LEAVE_RE12.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MIBDEFAULT_EMPLOYEE_LEAVE_RE12
*  INTO TABLE @DATA(IT_MIBDEFAULT_EMPLOYEE_LEAVE_RE122).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 INDEX 1 INTO DATA(WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE122).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 ASSIGNING <MIBDEFAULT_EMPLOYEE_LEAVE_RE12>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MIBDEFAULT_EMPLOYEE_LEAVE_RE12>-CONTROLLER = 1.
<MIBDEFAULT_EMPLOYEE_LEAVE_RE12>-FIRST_ADDITIONAL_INFORMATION_T = 1.
<MIBDEFAULT_EMPLOYEE_LEAVE_RE12>-CONTROLLER = 1.
<MIBDEFAULT_EMPLOYEE_LEAVE_RE12>-LANGUAGE_CODE = 1.
<MIBDEFAULT_EMPLOYEE_LEAVE_RE12>-CONTENT = 1.

ENDLOOP.

LOOP AT IT_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 INTO WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12-SECOND_ADDITIONAL_INFORMATION, sy-vline,
  WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12-CONTROLLER, sy-vline,
  WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12-LANGUAGE_CODE, sy-vline,
  WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12-CONTENT, sy-vline,
  WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12-THIRD_ADDITIONAL_INFORMATION_T, sy-vline,
  WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12-CONTROLLER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_MIBDEFAULT_EMPLOYEE_LEAVE_RE12 INTO WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR, 
CONTROLLER TYPE STRING,
FIRST_ADDITIONAL_INFORMATION_T TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
SECOND_ADDITIONAL_INFORMATION TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
THIRD_ADDITIONAL_INFORMATION_T TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
FOURTH_ADDITIONAL_INFORMATION TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
FIFTH_ADDITIONAL_INFORMATION_T TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
SIXTH_ADDITIONAL_INFORMATION_T TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
SEVENTH_ADDITIONAL_INFORMATION TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
EIGHTH_ADDITIONAL_INFORMATION TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
NINTH_ADDITIONAL_INFORMATION_T TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,
TENTH_ADDITIONAL_INFORMATION_T TYPE STRING,
CONTROLLER TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CONTENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-FIRST_ADDITIONAL_INFORMATION_T sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-SECOND_ADDITIONAL_INFORMATION sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-THIRD_ADDITIONAL_INFORMATION_T sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-FOURTH_ADDITIONAL_INFORMATION sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-FIFTH_ADDITIONAL_INFORMATION_T sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-SIXTH_ADDITIONAL_INFORMATION_T sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-SEVENTH_ADDITIONAL_INFORMATION sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-EIGHTH_ADDITIONAL_INFORMATION sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-NINTH_ADDITIONAL_INFORMATION_T sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-TENTH_ADDITIONAL_INFORMATION_T sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTROLLER sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-LANGUAGE_CODE sy-vline 
WA_MIBDEFAULT_EMPLOYEE_LEAVE_RE12_STR-CONTENT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.