ABAP Select data from SAP table IWBKEPM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IWBKEPM 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 IWBKEPM. 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 IWBKEPM 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_IWBKEPM TYPE STANDARD TABLE OF IWBKEPM,
      WA_IWBKEPM TYPE IWBKEPM,
      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: <IWBKEPM> TYPE IWBKEPM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWBKEPM
*  INTO TABLE @DATA(IT_IWBKEPM2).
*--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_IWBKEPM INDEX 1 INTO DATA(WA_IWBKEPM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWBKEPM>-HR_KEY = 1.
<IWBKEPM>-CLASS = 1.
<IWBKEPM>-OBJID = 1.
<IWBKEPM>-COURSE = 1.
<IWBKEPM>-LANGUAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWBKEPM-RELEASE, sy-vline,
  WA_IWBKEPM-INDUSTRY, sy-vline,
  WA_IWBKEPM-COUNTRY, sy-vline,
  WA_IWBKEPM-COURSE_LAN, sy-vline,
  WA_IWBKEPM-BEGIN_TIME, sy-vline,
  WA_IWBKEPM-END_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWBKEPM 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_IWBKEPM 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_IWBKEPM INTO WA_IWBKEPM.


*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.

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IWBKEPM-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWBKEPM-LANGUAGE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_IWBKEPM_STR, 
HR_KEY TYPE STRING,
CLASS TYPE STRING,
OBJID TYPE STRING,
COURSE TYPE STRING,
LANGUAGE TYPE STRING,
RELEASE TYPE STRING,
INDUSTRY TYPE STRING,
COUNTRY TYPE STRING,
COURSE_LAN TYPE STRING,
BEGIN_TIME TYPE STRING,
END_TIME TYPE STRING,
BEGIN_DATE TYPE STRING,
BEGIN_T2 TYPE STRING,
END_DATE TYPE STRING,
END_T2 TYPE STRING,
STATUS_C TYPE STRING,
LIGHT_C TYPE STRING,
LIGHT_PC TYPE STRING,
LOG_DEST TYPE STRING,
LASTCALL TYPE STRING,
STATUS TYPE STRING,
VERSION TYPE STRING,
CYCLETIME TYPE STRING,
TRACE TYPE STRING,
MAINT TYPE STRING,
ERRORS TYPE STRING,
WARNINGS TYPE STRING,
FREESPCMIN TYPE STRING,
FREESPC TYPE STRING,
FREESPCAKT TYPE STRING,
LOCATION TYPE STRING,
BUILDING TYPE STRING,
ROOM TYPE STRING,
GENERATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWBKEPM_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_IWBKEPM_STR-HR_KEY sy-vline 
WA_IWBKEPM_STR-CLASS sy-vline 
WA_IWBKEPM_STR-OBJID sy-vline 
WA_IWBKEPM_STR-COURSE sy-vline 
WA_IWBKEPM_STR-LANGUAGE sy-vline 
WA_IWBKEPM_STR-RELEASE sy-vline 
WA_IWBKEPM_STR-INDUSTRY sy-vline 
WA_IWBKEPM_STR-COUNTRY sy-vline 
WA_IWBKEPM_STR-COURSE_LAN sy-vline 
WA_IWBKEPM_STR-BEGIN_TIME sy-vline 
WA_IWBKEPM_STR-END_TIME sy-vline 
WA_IWBKEPM_STR-BEGIN_DATE sy-vline 
WA_IWBKEPM_STR-BEGIN_T2 sy-vline 
WA_IWBKEPM_STR-END_DATE sy-vline 
WA_IWBKEPM_STR-END_T2 sy-vline 
WA_IWBKEPM_STR-STATUS_C sy-vline 
WA_IWBKEPM_STR-LIGHT_C sy-vline 
WA_IWBKEPM_STR-LIGHT_PC sy-vline 
WA_IWBKEPM_STR-LOG_DEST sy-vline 
WA_IWBKEPM_STR-LASTCALL sy-vline 
WA_IWBKEPM_STR-STATUS sy-vline 
WA_IWBKEPM_STR-VERSION sy-vline 
WA_IWBKEPM_STR-CYCLETIME sy-vline 
WA_IWBKEPM_STR-TRACE sy-vline 
WA_IWBKEPM_STR-MAINT sy-vline 
WA_IWBKEPM_STR-ERRORS sy-vline 
WA_IWBKEPM_STR-WARNINGS sy-vline 
WA_IWBKEPM_STR-FREESPCMIN sy-vline 
WA_IWBKEPM_STR-FREESPC sy-vline 
WA_IWBKEPM_STR-FREESPCAKT sy-vline 
WA_IWBKEPM_STR-LOCATION sy-vline 
WA_IWBKEPM_STR-BUILDING sy-vline 
WA_IWBKEPM_STR-ROOM sy-vline 
WA_IWBKEPM_STR-GENERATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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