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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /AIF/V_LFA_CONF
*  INTO TABLE @DATA(IT_/AIF/V_LFA_CONF2).
*--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/V_LFA_CONF INDEX 1 INTO DATA(WA_/AIF/V_LFA_CONF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</AIF/V_LFA_CONF>-MANDT = 1.
</AIF/V_LFA_CONF>-FILECONFNS = 1.
</AIF/V_LFA_CONF>-FILECONF = 1.
</AIF/V_LFA_CONF>-FILETYPE = 1.
</AIF/V_LFA_CONF>-FILECONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/AIF/V_LFA_CONF-TEXTTYPE, sy-vline,
  WA_/AIF/V_LFA_CONF-CODEPAGE, sy-vline,
  WA_/AIF/V_LFA_CONF-SEPARATOR, sy-vline,
  WA_/AIF/V_LFA_CONF-QUOTMARK, sy-vline,
  WA_/AIF/V_LFA_CONF-STORE_FILE, sy-vline,
  WA_/AIF/V_LFA_CONF-TRANSFORMATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/AIF/V_LFA_CONF 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/V_LFA_CONF 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/V_LFA_CONF INTO WA_/AIF/V_LFA_CONF.


*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/V_LFA_CONF_STR, 
MANDT TYPE STRING,
FILECONFNS TYPE STRING,
FILECONF TYPE STRING,
FILETYPE TYPE STRING,
FILECONT TYPE STRING,
TEXTTYPE TYPE STRING,
CODEPAGE TYPE STRING,
SEPARATOR TYPE STRING,
QUOTMARK TYPE STRING,
STORE_FILE TYPE STRING,
TRANSFORMATION TYPE STRING,
FUNCTION_MODULE TYPE STRING,
HEADERLINE TYPE STRING,
FOOTERLINE TYPE STRING,
OFFSET_TDET TYPE STRING,
CHARS_TDET TYPE STRING,
STRUCTURE TYPE STRING,
FIELDNAME TYPE STRING,
NOSHOW TYPE STRING,
IGN_CONV TYPE STRING,
TRANS_PARAM TYPE STRING,
USE_PROXY_TRANS TYPE STRING,
FIELDNAME_ADM TYPE STRING,
REMOVE_DET_VALUE TYPE STRING,
OUTPUT_SETTINGS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/AIF/V_LFA_CONF_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/V_LFA_CONF_STR-MANDT sy-vline 
WA_/AIF/V_LFA_CONF_STR-FILECONFNS sy-vline 
WA_/AIF/V_LFA_CONF_STR-FILECONF sy-vline 
WA_/AIF/V_LFA_CONF_STR-FILETYPE sy-vline 
WA_/AIF/V_LFA_CONF_STR-FILECONT sy-vline 
WA_/AIF/V_LFA_CONF_STR-TEXTTYPE sy-vline 
WA_/AIF/V_LFA_CONF_STR-CODEPAGE sy-vline 
WA_/AIF/V_LFA_CONF_STR-SEPARATOR sy-vline 
WA_/AIF/V_LFA_CONF_STR-QUOTMARK sy-vline 
WA_/AIF/V_LFA_CONF_STR-STORE_FILE sy-vline 
WA_/AIF/V_LFA_CONF_STR-TRANSFORMATION sy-vline 
WA_/AIF/V_LFA_CONF_STR-FUNCTION_MODULE sy-vline 
WA_/AIF/V_LFA_CONF_STR-HEADERLINE sy-vline 
WA_/AIF/V_LFA_CONF_STR-FOOTERLINE sy-vline 
WA_/AIF/V_LFA_CONF_STR-OFFSET_TDET sy-vline 
WA_/AIF/V_LFA_CONF_STR-CHARS_TDET sy-vline 
WA_/AIF/V_LFA_CONF_STR-STRUCTURE sy-vline 
WA_/AIF/V_LFA_CONF_STR-FIELDNAME sy-vline 
WA_/AIF/V_LFA_CONF_STR-NOSHOW sy-vline 
WA_/AIF/V_LFA_CONF_STR-IGN_CONV sy-vline 
WA_/AIF/V_LFA_CONF_STR-TRANS_PARAM sy-vline 
WA_/AIF/V_LFA_CONF_STR-USE_PROXY_TRANS sy-vline 
WA_/AIF/V_LFA_CONF_STR-FIELDNAME_ADM sy-vline 
WA_/AIF/V_LFA_CONF_STR-REMOVE_DET_VALUE sy-vline 
WA_/AIF/V_LFA_CONF_STR-OUTPUT_SETTINGS sy-vline      INTO ld_text SEPARATED BY SPACE.

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