ABAP Select data from SAP table EWFGRUS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWFGRUS
*  INTO TABLE @DATA(IT_EWFGRUS2).
*--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_EWFGRUS INDEX 1 INTO DATA(WA_EWFGRUS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWFGRUS>-MANDT = 1.
<EWFGRUS>-ACTSTAT = 1.
<EWFGRUS>-LANGU = 1.
<EWFGRUS>-CONFIG = 1.
<EWFGRUS>-CALLGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWFGRUS-DESCRIPT, sy-vline,
  WA_EWFGRUS-POSGROUP, sy-vline,
  WA_EWFGRUS-POSNR, sy-vline,
  WA_EWFGRUS-ICONNAME, sy-vline,
  WA_EWFGRUS-OBJTYPE, sy-vline,
  WA_EWFGRUS-LOGICALSYSTEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWFGRUS 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_EWFGRUS 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_EWFGRUS INTO WA_EWFGRUS.


*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 LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EWFGRUS-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWFGRUS-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWFGRUS-LOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWFGRUS-LOGICALSYSTEM.
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_EWFGRUS_STR, 
MANDT TYPE STRING,
ACTSTAT TYPE STRING,
LANGU TYPE STRING,
CONFIG TYPE STRING,
CALLGROUP TYPE STRING,
DESCRIPT TYPE STRING,
POSGROUP TYPE STRING,
POSNR TYPE STRING,
ICONNAME TYPE STRING,
OBJTYPE TYPE STRING,
LOGICALSYSTEM TYPE STRING,
POSGR_1 TYPE STRING,
POSGR_2 TYPE STRING,
OLD_CALLGR TYPE STRING,
OBJTYPDESCR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWFGRUS_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_EWFGRUS_STR-MANDT sy-vline 
WA_EWFGRUS_STR-ACTSTAT sy-vline 
WA_EWFGRUS_STR-LANGU sy-vline 
WA_EWFGRUS_STR-CONFIG sy-vline 
WA_EWFGRUS_STR-CALLGROUP sy-vline 
WA_EWFGRUS_STR-DESCRIPT sy-vline 
WA_EWFGRUS_STR-POSGROUP sy-vline 
WA_EWFGRUS_STR-POSNR sy-vline 
WA_EWFGRUS_STR-ICONNAME sy-vline 
WA_EWFGRUS_STR-OBJTYPE sy-vline 
WA_EWFGRUS_STR-LOGICALSYSTEM sy-vline 
WA_EWFGRUS_STR-POSGR_1 sy-vline 
WA_EWFGRUS_STR-POSGR_2 sy-vline 
WA_EWFGRUS_STR-OLD_CALLGR sy-vline 
WA_EWFGRUS_STR-OBJTYPDESCR sy-vline      INTO ld_text SEPARATED BY SPACE.

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