ABAP Select data from SAP table /AIF/FUNCTIONS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /AIF/FUNCTIONS 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 /AIF/FUNCTIONS. 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 /AIF/FUNCTIONS 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_/AIF/FUNCTIONS TYPE STANDARD TABLE OF /AIF/FUNCTIONS,
      WA_/AIF/FUNCTIONS TYPE /AIF/FUNCTIONS,
      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: </AIF/FUNCTIONS> TYPE /AIF/FUNCTIONS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /AIF/FUNCTIONS
  INTO TABLE IT_/AIF/FUNCTIONS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /AIF/FUNCTIONS
*  INTO TABLE @DATA(IT_/AIF/FUNCTIONS2).
*--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_/AIF/FUNCTIONS INDEX 1 INTO DATA(WA_/AIF/FUNCTIONS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/AIF/FUNCTIONS ASSIGNING </AIF/FUNCTIONS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</AIF/FUNCTIONS>-IDFUNC = 1.
</AIF/FUNCTIONS>-ICON = 1.
</AIF/FUNCTIONS>-FUNCTYPE = 1.
</AIF/FUNCTIONS>-MSGID = 1.
</AIF/FUNCTIONS>-MSGNO = 1.

ENDLOOP.

LOOP AT IT_/AIF/FUNCTIONS INTO WA_/AIF/FUNCTIONS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/AIF/FUNCTIONS-INTERFACE, sy-vline,
  WA_/AIF/FUNCTIONS-NAMESPACE, sy-vline,
  WA_/AIF/FUNCTIONS-IFVERSION, sy-vline,
  WA_/AIF/FUNCTIONS-FROM, sy-vline,
  WA_/AIF/FUNCTIONS-TEXT, sy-vline,
  WA_/AIF/FUNCTIONS-TOOLTIP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/AIF/FUNCTIONS 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_/AIF/FUNCTIONS 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_/AIF/FUNCTIONS INTO WA_/AIF/FUNCTIONS.


*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_/AIF/FUNCTIONS_STR, 
IDFUNC TYPE STRING,
ICON TYPE STRING,
FUNCTYPE TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
INTERFACE TYPE STRING,
NAMESPACE TYPE STRING,
IFVERSION TYPE STRING,
FROM TYPE STRING,
TEXT TYPE STRING,
TOOLTIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/AIF/FUNCTIONS_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_/AIF/FUNCTIONS_STR-IDFUNC sy-vline 
WA_/AIF/FUNCTIONS_STR-ICON sy-vline 
WA_/AIF/FUNCTIONS_STR-FUNCTYPE sy-vline 
WA_/AIF/FUNCTIONS_STR-MSGID sy-vline 
WA_/AIF/FUNCTIONS_STR-MSGNO sy-vline 
WA_/AIF/FUNCTIONS_STR-INTERFACE sy-vline 
WA_/AIF/FUNCTIONS_STR-NAMESPACE sy-vline 
WA_/AIF/FUNCTIONS_STR-IFVERSION sy-vline 
WA_/AIF/FUNCTIONS_STR-FROM sy-vline 
WA_/AIF/FUNCTIONS_STR-TEXT sy-vline 
WA_/AIF/FUNCTIONS_STR-TOOLTIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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