ABAP Select data from SAP table RKWTP_GD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKWTP_GD
*  INTO TABLE @DATA(IT_RKWTP_GD2).
*--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_RKWTP_GD INDEX 1 INTO DATA(WA_RKWTP_GD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKWTP_GD>-FROM = 1.
<RKWTP_GD>-TO = 1.
<RKWTP_GD>-WRTTP = 1.
<RKWTP_GD>-SELART = 1.
<RKWTP_GD>-SELART_TXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKWTP_GD-OBART, sy-vline,
  WA_RKWTP_GD-SUBART, sy-vline,
  WA_RKWTP_GD-ONEOBJECT, sy-vline,
  WA_RKWTP_GD-ONEPERIOD, sy-vline,
  WA_RKWTP_GD-ALLOBJECTS, sy-vline,
  WA_RKWTP_GD-AUTH_CHECKED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKWTP_GD 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_RKWTP_GD 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_RKWTP_GD INTO WA_RKWTP_GD.


*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_RKWTP_GD_STR, 
FROM TYPE STRING,
TO TYPE STRING,
WRTTP TYPE STRING,
SELART TYPE STRING,
SELART_TXT TYPE STRING,
OBART TYPE STRING,
SUBART TYPE STRING,
ONEOBJECT TYPE STRING,
ONEPERIOD TYPE STRING,
ALLOBJECTS TYPE STRING,
AUTH_CHECKED TYPE STRING,
COIOB_NEC TYPE STRING,
BPKL TYPE STRING,
WITH_POSTEXT TYPE STRING,
VERSN_CNT TYPE STRING,
TITLETEXT TYPE STRING,
BOOKED TYPE STRING,
BOOKED_ALL TYPE STRING,
NO_CHANGE TYPE STRING,
MAX_ERROR TYPE STRING,
ERRORS TYPE STRING,
ERRORS_I TYPE STRING,
ERRORS_W TYPE STRING,
ERRORS_E TYPE STRING,
ERRORS_A TYPE STRING,
MESSAGE_ID TYPE STRING,
RFCGR TYPE STRING,
TASKNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKWTP_GD_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_RKWTP_GD_STR-FROM sy-vline 
WA_RKWTP_GD_STR-TO sy-vline 
WA_RKWTP_GD_STR-WRTTP sy-vline 
WA_RKWTP_GD_STR-SELART sy-vline 
WA_RKWTP_GD_STR-SELART_TXT sy-vline 
WA_RKWTP_GD_STR-OBART sy-vline 
WA_RKWTP_GD_STR-SUBART sy-vline 
WA_RKWTP_GD_STR-ONEOBJECT sy-vline 
WA_RKWTP_GD_STR-ONEPERIOD sy-vline 
WA_RKWTP_GD_STR-ALLOBJECTS sy-vline 
WA_RKWTP_GD_STR-AUTH_CHECKED sy-vline 
WA_RKWTP_GD_STR-COIOB_NEC sy-vline 
WA_RKWTP_GD_STR-BPKL sy-vline 
WA_RKWTP_GD_STR-WITH_POSTEXT sy-vline 
WA_RKWTP_GD_STR-VERSN_CNT sy-vline 
WA_RKWTP_GD_STR-TITLETEXT sy-vline 
WA_RKWTP_GD_STR-BOOKED sy-vline 
WA_RKWTP_GD_STR-BOOKED_ALL sy-vline 
WA_RKWTP_GD_STR-NO_CHANGE sy-vline 
WA_RKWTP_GD_STR-MAX_ERROR sy-vline 
WA_RKWTP_GD_STR-ERRORS sy-vline 
WA_RKWTP_GD_STR-ERRORS_I sy-vline 
WA_RKWTP_GD_STR-ERRORS_W sy-vline 
WA_RKWTP_GD_STR-ERRORS_E sy-vline 
WA_RKWTP_GD_STR-ERRORS_A sy-vline 
WA_RKWTP_GD_STR-MESSAGE_ID sy-vline 
WA_RKWTP_GD_STR-RFCGR sy-vline 
WA_RKWTP_GD_STR-TASKNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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