ABAP Select data from SAP table ARS_W_APIV_ND into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ARS_W_APIV_ND
*  INTO TABLE @DATA(IT_ARS_W_APIV_ND2).
*--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_ARS_W_APIV_ND INDEX 1 INTO DATA(WA_ARS_W_APIV_ND2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ARS_W_APIV_ND>-API_ID = 1.
<ARS_W_APIV_ND>-MAJOR_RELEASE = 1.
<ARS_W_APIV_ND>-MINOR_RELEASE = 1.
<ARS_W_APIV_ND>-VERSION = 1.
<ARS_W_APIV_ND>-SUB_OBJECT_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ARS_W_APIV_ND-SUB_OBJECT_NAME, sy-vline,
  WA_ARS_W_APIV_ND-COMPATIBILITY_CONTRACT, sy-vline,
  WA_ARS_W_APIV_ND-NODE_ID, sy-vline,
  WA_ARS_W_APIV_ND-PARENT_NODE_ID, sy-vline,
  WA_ARS_W_APIV_ND-NODE_NAME, sy-vline,
  WA_ARS_W_APIV_ND-NODE_KIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ARS_W_APIV_ND 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_ARS_W_APIV_ND 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_ARS_W_APIV_ND INTO WA_ARS_W_APIV_ND.


*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_ARS_W_APIV_ND_STR, 
API_ID TYPE STRING,
MAJOR_RELEASE TYPE STRING,
MINOR_RELEASE TYPE STRING,
VERSION TYPE STRING,
SUB_OBJECT_TYPE TYPE STRING,
SUB_OBJECT_NAME TYPE STRING,
COMPATIBILITY_CONTRACT TYPE STRING,
NODE_ID TYPE STRING,
PARENT_NODE_ID TYPE STRING,
NODE_NAME TYPE STRING,
NODE_KIND TYPE STRING,
NODE_VALUE TYPE STRING,
BASETYPE TYPE STRING,
REFERENCE TYPE STRING,
LENGTH TYPE STRING,
DECIMALS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ARS_W_APIV_ND_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_ARS_W_APIV_ND_STR-API_ID sy-vline 
WA_ARS_W_APIV_ND_STR-MAJOR_RELEASE sy-vline 
WA_ARS_W_APIV_ND_STR-MINOR_RELEASE sy-vline 
WA_ARS_W_APIV_ND_STR-VERSION sy-vline 
WA_ARS_W_APIV_ND_STR-SUB_OBJECT_TYPE sy-vline 
WA_ARS_W_APIV_ND_STR-SUB_OBJECT_NAME sy-vline 
WA_ARS_W_APIV_ND_STR-COMPATIBILITY_CONTRACT sy-vline 
WA_ARS_W_APIV_ND_STR-NODE_ID sy-vline 
WA_ARS_W_APIV_ND_STR-PARENT_NODE_ID sy-vline 
WA_ARS_W_APIV_ND_STR-NODE_NAME sy-vline 
WA_ARS_W_APIV_ND_STR-NODE_KIND sy-vline 
WA_ARS_W_APIV_ND_STR-NODE_VALUE sy-vline 
WA_ARS_W_APIV_ND_STR-BASETYPE sy-vline 
WA_ARS_W_APIV_ND_STR-REFERENCE sy-vline 
WA_ARS_W_APIV_ND_STR-LENGTH sy-vline 
WA_ARS_W_APIV_ND_STR-DECIMALS sy-vline      INTO ld_text SEPARATED BY SPACE.

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