ABAP Select data from SAP table API_VALUE_ASSIGNED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM API_VALUE_ASSIGNED
*  INTO TABLE @DATA(IT_API_VALUE_ASSIGNED2).
*--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_API_VALUE_ASSIGNED INDEX 1 INTO DATA(WA_API_VALUE_ASSIGNED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<API_VALUE_ASSIGNED>-ATINN = 1.
<API_VALUE_ASSIGNED>-ATFOR = 1.
<API_VALUE_ASSIGNED>-MSEHI = 1.
<API_VALUE_ASSIGNED>-ATZHL = 1.
<API_VALUE_ASSIGNED>-ATWRT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_API_VALUE_ASSIGNED-ATWTB, sy-vline,
  WA_API_VALUE_ASSIGNED-ATFLV, sy-vline,
  WA_API_VALUE_ASSIGNED-ATAWE, sy-vline,
  WA_API_VALUE_ASSIGNED-ATFLB, sy-vline,
  WA_API_VALUE_ASSIGNED-ATAW1, sy-vline,
  WA_API_VALUE_ASSIGNED-ATCOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_API_VALUE_ASSIGNED 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_API_VALUE_ASSIGNED 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_API_VALUE_ASSIGNED INTO WA_API_VALUE_ASSIGNED.


*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 ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_API_VALUE_ASSIGNED-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_API_VALUE_ASSIGNED-ATINN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MSEHI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_API_VALUE_ASSIGNED-MSEHI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_API_VALUE_ASSIGNED-MSEHI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAWE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_API_VALUE_ASSIGNED-ATAWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_API_VALUE_ASSIGNED-ATAWE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_API_VALUE_ASSIGNED-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_API_VALUE_ASSIGNED-ATAW1.
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_API_VALUE_ASSIGNED_STR, 
ATINN TYPE STRING,
ATFOR TYPE STRING,
MSEHI TYPE STRING,
ATZHL TYPE STRING,
ATWRT TYPE STRING,
ATWTB TYPE STRING,
ATFLV TYPE STRING,
ATAWE TYPE STRING,
ATFLB TYPE STRING,
ATAW1 TYPE STRING,
ATCOD TYPE STRING,
ATAUT TYPE STRING,
INCO TYPE STRING,
DISPLAY_ORDER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_API_VALUE_ASSIGNED_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_API_VALUE_ASSIGNED_STR-ATINN sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATFOR sy-vline 
WA_API_VALUE_ASSIGNED_STR-MSEHI sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATZHL sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATWRT sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATWTB sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATFLV sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATAWE sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATFLB sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATAW1 sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATCOD sy-vline 
WA_API_VALUE_ASSIGNED_STR-ATAUT sy-vline 
WA_API_VALUE_ASSIGNED_STR-INCO sy-vline 
WA_API_VALUE_ASSIGNED_STR-DISPLAY_ORDER sy-vline      INTO ld_text SEPARATED BY SPACE.

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