ABAP Select data from SAP table IDCN_FORMLINES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDCN_FORMLINES
*  INTO TABLE @DATA(IT_IDCN_FORMLINES2).
*--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_IDCN_FORMLINES INDEX 1 INTO DATA(WA_IDCN_FORMLINES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDCN_FORMLINES>-LINENR = 1.
<IDCN_FORMLINES>-LINESEC = 1.
<IDCN_FORMLINES>-LINELEV = 1.
<IDCN_FORMLINES>-LINETYPE = 1.
<IDCN_FORMLINES>-LINETEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDCN_FORMLINES-LINENREXT, sy-vline,
  WA_IDCN_FORMLINES-ERGSL, sy-vline,
  WA_IDCN_FORMLINES-BSUM, sy-vline,
  WA_IDCN_FORMLINES-VSUM, sy-vline,
  WA_IDCN_FORMLINES-SALDO, sy-vline,
  WA_IDCN_FORMLINES-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDCN_FORMLINES 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_IDCN_FORMLINES 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_IDCN_FORMLINES INTO WA_IDCN_FORMLINES.


*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 AU172, internal->external for field BSUM
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_FORMLINES-BSUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_FORMLINES-BSUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field VSUM
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_FORMLINES-VSUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_FORMLINES-VSUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field SALDO
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_IDCN_FORMLINES-SALDO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDCN_FORMLINES-SALDO.
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_IDCN_FORMLINES_STR, 
LINENR TYPE STRING,
LINESEC TYPE STRING,
LINELEV TYPE STRING,
LINETYPE TYPE STRING,
LINETEXT TYPE STRING,
LINENREXT TYPE STRING,
ERGSL TYPE STRING,
BSUM TYPE STRING,
VSUM TYPE STRING,
SALDO TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDCN_FORMLINES_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_IDCN_FORMLINES_STR-LINENR sy-vline 
WA_IDCN_FORMLINES_STR-LINESEC sy-vline 
WA_IDCN_FORMLINES_STR-LINELEV sy-vline 
WA_IDCN_FORMLINES_STR-LINETYPE sy-vline 
WA_IDCN_FORMLINES_STR-LINETEXT sy-vline 
WA_IDCN_FORMLINES_STR-LINENREXT sy-vline 
WA_IDCN_FORMLINES_STR-ERGSL sy-vline 
WA_IDCN_FORMLINES_STR-BSUM sy-vline 
WA_IDCN_FORMLINES_STR-VSUM sy-vline 
WA_IDCN_FORMLINES_STR-SALDO sy-vline 
WA_IDCN_FORMLINES_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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