ABAP Select data from SAP table RNG13 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNG13 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 RNG13. 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 RNG13 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_RNG13 TYPE STANDARD TABLE OF RNG13,
      WA_RNG13 TYPE RNG13,
      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: <RNG13> TYPE RNG13.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNG13.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNG13
  INTO TABLE IT_RNG13.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNG13
*  INTO TABLE @DATA(IT_RNG132).
*--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_RNG13 INDEX 1 INTO DATA(WA_RNG132).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNG13 ASSIGNING <RNG13>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNG13>-MANDT = 1.
<RNG13>-BANKS = 1.
<RNG13>-BANKL = 1.
<RNG13>-BANKN = 1.
<RNG13>-XEZER = 1.

ENDLOOP.

LOOP AT IT_RNG13 INTO WA_RNG13.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNG13-BANKA, sy-vline,
  WA_RNG13-PROVZ, sy-vline,
  WA_RNG13-STRAS, sy-vline,
  WA_RNG13-ORT01, sy-vline,
  WA_RNG13-SWIFT, sy-vline,
  WA_RNG13-BGRUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNG13 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_RNG13 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_RNG13 INTO WA_RNG13.


*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_RNG13_STR, 
MANDT TYPE STRING,
BANKS TYPE STRING,
BANKL TYPE STRING,
BANKN TYPE STRING,
XEZER TYPE STRING,
BANKA TYPE STRING,
PROVZ TYPE STRING,
STRAS TYPE STRING,
ORT01 TYPE STRING,
SWIFT TYPE STRING,
BGRUP TYPE STRING,
XPGRO TYPE STRING,
INSERT TYPE STRING,
BKONT TYPE STRING,
BVTYP TYPE STRING,
BKREF TYPE STRING,
KOINH TYPE STRING,
IBAN TYPE STRING,
IBAN_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNG13_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_RNG13_STR-MANDT sy-vline 
WA_RNG13_STR-BANKS sy-vline 
WA_RNG13_STR-BANKL sy-vline 
WA_RNG13_STR-BANKN sy-vline 
WA_RNG13_STR-XEZER sy-vline 
WA_RNG13_STR-BANKA sy-vline 
WA_RNG13_STR-PROVZ sy-vline 
WA_RNG13_STR-STRAS sy-vline 
WA_RNG13_STR-ORT01 sy-vline 
WA_RNG13_STR-SWIFT sy-vline 
WA_RNG13_STR-BGRUP sy-vline 
WA_RNG13_STR-XPGRO sy-vline 
WA_RNG13_STR-INSERT sy-vline 
WA_RNG13_STR-BKONT sy-vline 
WA_RNG13_STR-BVTYP sy-vline 
WA_RNG13_STR-BKREF sy-vline 
WA_RNG13_STR-KOINH sy-vline 
WA_RNG13_STR-IBAN sy-vline 
WA_RNG13_STR-IBAN_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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