ABAP Select data from SAP table DTWCGRPSTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTWCGRPSTR
*  INTO TABLE @DATA(IT_DTWCGRPSTR2).
*--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_DTWCGRPSTR INDEX 1 INTO DATA(WA_DTWCGRPSTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTWCGRPSTR>-MANDT = 1.
<DTWCGRPSTR>-DRAFTUUID = 1.
<DTWCGRPSTR>-PARENTDRAFTUUID = 1.
<DTWCGRPSTR>-WORKCENTERGROUPTYPECODE = 1.
<DTWCGRPSTR>-WORKCENTERGROUPINTERNALID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTWCGRPSTR-OBJECTTYPECODE, sy-vline,
  WA_DTWCGRPSTR-OBJECTINTERNALID, sy-vline,
  WA_DTWCGRPSTR-WORKCENTERTYPECODE, sy-vline,
  WA_DTWCGRPSTR-WORKCENTERINTERNALID, sy-vline,
  WA_DTWCGRPSTR-OBJECTNAME, sy-vline,
  WA_DTWCGRPSTR-OBJECTDESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTWCGRPSTR 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_DTWCGRPSTR 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_DTWCGRPSTR INTO WA_DTWCGRPSTR.


*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_DTWCGRPSTR_STR, 
MANDT TYPE STRING,
DRAFTUUID TYPE STRING,
PARENTDRAFTUUID TYPE STRING,
WORKCENTERGROUPTYPECODE TYPE STRING,
WORKCENTERGROUPINTERNALID TYPE STRING,
OBJECTTYPECODE TYPE STRING,
OBJECTINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
OBJECTNAME TYPE STRING,
OBJECTDESCRIPTION TYPE STRING,
PLANT TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTWCGRPSTR_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_DTWCGRPSTR_STR-MANDT sy-vline 
WA_DTWCGRPSTR_STR-DRAFTUUID sy-vline 
WA_DTWCGRPSTR_STR-PARENTDRAFTUUID sy-vline 
WA_DTWCGRPSTR_STR-WORKCENTERGROUPTYPECODE sy-vline 
WA_DTWCGRPSTR_STR-WORKCENTERGROUPINTERNALID sy-vline 
WA_DTWCGRPSTR_STR-OBJECTTYPECODE sy-vline 
WA_DTWCGRPSTR_STR-OBJECTINTERNALID sy-vline 
WA_DTWCGRPSTR_STR-WORKCENTERTYPECODE sy-vline 
WA_DTWCGRPSTR_STR-WORKCENTERINTERNALID sy-vline 
WA_DTWCGRPSTR_STR-OBJECTNAME sy-vline 
WA_DTWCGRPSTR_STR-OBJECTDESCRIPTION sy-vline 
WA_DTWCGRPSTR_STR-PLANT sy-vline 
WA_DTWCGRPSTR_STR-HASACTIVEENTITY sy-vline 
WA_DTWCGRPSTR_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_DTWCGRPSTR_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_DTWCGRPSTR_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_DTWCGRPSTR_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_DTWCGRPSTR_STR-DRAFTENTITYOPERATIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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