ABAP Select data from SAP table RDRAW_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDRAW_FIELDS
*  INTO TABLE @DATA(IT_RDRAW_FIELDS2).
*--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_RDRAW_FIELDS INDEX 1 INTO DATA(WA_RDRAW_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDRAW_FIELDS>-DWNAM = 1.
<RDRAW_FIELDS>-DOKST = 1.
<RDRAW_FIELDS>-LOEDK = 1.
<RDRAW_FIELDS>-DTTRG = 1.
<RDRAW_FIELDS>-DAPPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDRAW_FIELDS-DTTRG1, sy-vline,
  WA_RDRAW_FIELDS-VRLDAT, sy-vline,
  WA_RDRAW_FIELDS-RES1, sy-vline,
  WA_RDRAW_FIELDS-RES2, sy-vline,
  WA_RDRAW_FIELDS-RES3, sy-vline,
  WA_RDRAW_FIELDS-RES4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDRAW_FIELDS 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_RDRAW_FIELDS 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_RDRAW_FIELDS INTO WA_RDRAW_FIELDS.


*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_RDRAW_FIELDS_STR, 
DWNAM TYPE STRING,
DOKST TYPE STRING,
LOEDK TYPE STRING,
DTTRG TYPE STRING,
DAPPL TYPE STRING,
DTTRG1 TYPE STRING,
VRLDAT TYPE STRING,
RES1 TYPE STRING,
RES2 TYPE STRING,
RES3 TYPE STRING,
RES4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDRAW_FIELDS_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_RDRAW_FIELDS_STR-DWNAM sy-vline 
WA_RDRAW_FIELDS_STR-DOKST sy-vline 
WA_RDRAW_FIELDS_STR-LOEDK sy-vline 
WA_RDRAW_FIELDS_STR-DTTRG sy-vline 
WA_RDRAW_FIELDS_STR-DAPPL sy-vline 
WA_RDRAW_FIELDS_STR-DTTRG1 sy-vline 
WA_RDRAW_FIELDS_STR-VRLDAT sy-vline 
WA_RDRAW_FIELDS_STR-RES1 sy-vline 
WA_RDRAW_FIELDS_STR-RES2 sy-vline 
WA_RDRAW_FIELDS_STR-RES3 sy-vline 
WA_RDRAW_FIELDS_STR-RES4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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