ABAP Select data from SAP table RGSBL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RGSBL
*  INTO TABLE @DATA(IT_RGSBL2).
*--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_RGSBL INDEX 1 INTO DATA(WA_RGSBL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RGSBL>-MARK = 1.
<RGSBL>-INITIALFLG = 1.
<RGSBL>-TEMP = 1.
<RGSBL>-LINEID = 1.
<RGSBL>-LINE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RGSBL-FNAME, sy-vline,
  WA_RGSBL-SETNR, sy-vline,
  WA_RGSBL-FIELD, sy-vline,
  WA_RGSBL-FIELDTEXT, sy-vline,
  WA_RGSBL-FROM, sy-vline,
  WA_RGSBL-TO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RGSBL 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_RGSBL 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_RGSBL INTO WA_RGSBL.


*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_RGSBL_STR, 
MARK TYPE STRING,
INITIALFLG TYPE STRING,
TEMP TYPE STRING,
LINEID TYPE STRING,
LINE TYPE STRING,
FNAME TYPE STRING,
SETNR TYPE STRING,
FIELD TYPE STRING,
FIELDTEXT TYPE STRING,
FROM TYPE STRING,
TO TYPE STRING,
TITLE TYPE STRING,
PRTCLASS TYPE STRING,
LNAME TYPE STRING,
TEXTNR TYPE STRING,
FLAG TYPE STRING,
ZPFLAG TYPE STRING,
PMFLAG TYPE STRING,
FPDOWN TYPE STRING,
PFEED TYPE STRING,
SHORTNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RGSBL_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_RGSBL_STR-MARK sy-vline 
WA_RGSBL_STR-INITIALFLG sy-vline 
WA_RGSBL_STR-TEMP sy-vline 
WA_RGSBL_STR-LINEID sy-vline 
WA_RGSBL_STR-LINE sy-vline 
WA_RGSBL_STR-FNAME sy-vline 
WA_RGSBL_STR-SETNR sy-vline 
WA_RGSBL_STR-FIELD sy-vline 
WA_RGSBL_STR-FIELDTEXT sy-vline 
WA_RGSBL_STR-FROM sy-vline 
WA_RGSBL_STR-TO sy-vline 
WA_RGSBL_STR-TITLE sy-vline 
WA_RGSBL_STR-PRTCLASS sy-vline 
WA_RGSBL_STR-LNAME sy-vline 
WA_RGSBL_STR-TEXTNR sy-vline 
WA_RGSBL_STR-FLAG sy-vline 
WA_RGSBL_STR-ZPFLAG sy-vline 
WA_RGSBL_STR-PMFLAG sy-vline 
WA_RGSBL_STR-FPDOWN sy-vline 
WA_RGSBL_STR-PFEED sy-vline 
WA_RGSBL_STR-SHORTNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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