ABAP Select data from SAP table RNASCO00 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNASCO00 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 RNASCO00. 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 RNASCO00 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_RNASCO00 TYPE STANDARD TABLE OF RNASCO00,
      WA_RNASCO00 TYPE RNASCO00,
      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: <RNASCO00> TYPE RNASCO00.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNASCO00.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNASCO00
  INTO TABLE IT_RNASCO00.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNASCO00
*  INTO TABLE @DATA(IT_RNASCO002).
*--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_RNASCO00 INDEX 1 INTO DATA(WA_RNASCO002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNASCO00 ASSIGNING <RNASCO00>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNASCO00>-GRP = 1.
<RNASCO00>-KNO = 1.
<RNASCO00>-BDU = 1.
<RNASCO00>-BDO = 1.
<RNASCO00>-BDM = 1.

ENDLOOP.

LOOP AT IT_RNASCO00 INTO WA_RNASCO00.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNASCO00-LDFPTK, sy-vline,
  WA_RNASCO00-LDFPLK, sy-vline,
  WA_RNASCO00-SCUTK, sy-vline,
  WA_RNASCO00-SCULK, sy-vline,
  WA_RNASCO00-BDZU, sy-vline,
  WA_RNASCO00-INTZU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNASCO00 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_RNASCO00 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_RNASCO00 INTO WA_RNASCO00.


*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.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNASCO00-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNASCO00-AUFNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RNASCO00_STR, 
GRP TYPE STRING,
KNO TYPE STRING,
BDU TYPE STRING,
BDO TYPE STRING,
BDM TYPE STRING,
LDFPTK TYPE STRING,
LDFPLK TYPE STRING,
SCUTK TYPE STRING,
SCULK TYPE STRING,
BDZU TYPE STRING,
INTZU TYPE STRING,
MELZU TYPE STRING,
SCSPEZ TYPE STRING,
SCGES TYPE STRING,
GESBD TYPE STRING,
HD TYPE STRING,
AUFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNASCO00_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_RNASCO00_STR-GRP sy-vline 
WA_RNASCO00_STR-KNO sy-vline 
WA_RNASCO00_STR-BDU sy-vline 
WA_RNASCO00_STR-BDO sy-vline 
WA_RNASCO00_STR-BDM sy-vline 
WA_RNASCO00_STR-LDFPTK sy-vline 
WA_RNASCO00_STR-LDFPLK sy-vline 
WA_RNASCO00_STR-SCUTK sy-vline 
WA_RNASCO00_STR-SCULK sy-vline 
WA_RNASCO00_STR-BDZU sy-vline 
WA_RNASCO00_STR-INTZU sy-vline 
WA_RNASCO00_STR-MELZU sy-vline 
WA_RNASCO00_STR-SCSPEZ sy-vline 
WA_RNASCO00_STR-SCGES sy-vline 
WA_RNASCO00_STR-GESBD sy-vline 
WA_RNASCO00_STR-HD sy-vline 
WA_RNASCO00_STR-AUFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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