ABAP Select data from SAP table RKSBL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKSBL
*  INTO TABLE @DATA(IT_RKSBL2).
*--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_RKSBL INDEX 1 INTO DATA(WA_RKSBL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKSBL>-SEQNR = 1.
<RKSBL>-LINE = 1.
<RKSBL>-LEVEL = 1.
<RKSBL>-FIELD = 1.
<RKSBL>-SETNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKSBL-TYPE, sy-vline,
  WA_RKSBL-FLAG, sy-vline,
  WA_RKSBL-UNIQUE, sy-vline,
  WA_RKSBL-PTUP, sy-vline,
  WA_RKSBL-PUP, sy-vline,
  WA_RKSBL-PTDOWN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKSBL 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_RKSBL 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_RKSBL INTO WA_RKSBL.


*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_RKSBL_STR, 
SEQNR TYPE STRING,
LINE TYPE STRING,
LEVEL TYPE STRING,
FIELD TYPE STRING,
SETNR TYPE STRING,
TYPE TYPE STRING,
FLAG TYPE STRING,
UNIQUE TYPE STRING,
PTUP TYPE STRING,
PUP TYPE STRING,
PTDOWN TYPE STRING,
PDOWN TYPE STRING,
PNEXT TYPE STRING,
PPREV TYPE STRING,
VCOUNT TYPE STRING,
MIN TYPE STRING,
MAX TYPE STRING,
MAXPTUP TYPE STRING,
MAXPUP TYPE STRING,
MAXLINE TYPE STRING,
TABLE TYPE STRING,
TITLE TYPE STRING,
SNAME TYPE STRING,
LNAME TYPE STRING,
SLEVEL TYPE STRING,
PRTCLASS TYPE STRING,
TEXTNR TYPE STRING,
PMFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKSBL_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_RKSBL_STR-SEQNR sy-vline 
WA_RKSBL_STR-LINE sy-vline 
WA_RKSBL_STR-LEVEL sy-vline 
WA_RKSBL_STR-FIELD sy-vline 
WA_RKSBL_STR-SETNR sy-vline 
WA_RKSBL_STR-TYPE sy-vline 
WA_RKSBL_STR-FLAG sy-vline 
WA_RKSBL_STR-UNIQUE sy-vline 
WA_RKSBL_STR-PTUP sy-vline 
WA_RKSBL_STR-PUP sy-vline 
WA_RKSBL_STR-PTDOWN sy-vline 
WA_RKSBL_STR-PDOWN sy-vline 
WA_RKSBL_STR-PNEXT sy-vline 
WA_RKSBL_STR-PPREV sy-vline 
WA_RKSBL_STR-VCOUNT sy-vline 
WA_RKSBL_STR-MIN sy-vline 
WA_RKSBL_STR-MAX sy-vline 
WA_RKSBL_STR-MAXPTUP sy-vline 
WA_RKSBL_STR-MAXPUP sy-vline 
WA_RKSBL_STR-MAXLINE sy-vline 
WA_RKSBL_STR-TABLE sy-vline 
WA_RKSBL_STR-TITLE sy-vline 
WA_RKSBL_STR-SNAME sy-vline 
WA_RKSBL_STR-LNAME sy-vline 
WA_RKSBL_STR-SLEVEL sy-vline 
WA_RKSBL_STR-PRTCLASS sy-vline 
WA_RKSBL_STR-TEXTNR sy-vline 
WA_RKSBL_STR-PMFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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