ABAP Select data from SAP table FKKCOLLERR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKCOLLERR
*  INTO TABLE @DATA(IT_FKKCOLLERR2).
*--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_FKKCOLLERR INDEX 1 INTO DATA(WA_FKKCOLLERR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKCOLLERR>-MSGTY = 1.
<FKKCOLLERR>-MSGID = 1.
<FKKCOLLERR>-MSGNR = 1.
<FKKCOLLERR>-MSGV1 = 1.
<FKKCOLLERR>-MSGV2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKCOLLERR-MSGV3, sy-vline,
  WA_FKKCOLLERR-MSGV4, sy-vline,
  WA_FKKCOLLERR-AMPEL, sy-vline,
  WA_FKKCOLLERR-LINENR, sy-vline,
  WA_FKKCOLLERR-TABNAME, sy-vline,
  WA_FKKCOLLERR-FLDNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKCOLLERR 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_FKKCOLLERR 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_FKKCOLLERR INTO WA_FKKCOLLERR.


*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_FKKCOLLERR_STR, 
MSGTY TYPE STRING,
MSGID TYPE STRING,
MSGNR TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
AMPEL TYPE STRING,
LINENR TYPE STRING,
TABNAME TYPE STRING,
FLDNAME TYPE STRING,
MSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKCOLLERR_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_FKKCOLLERR_STR-MSGTY sy-vline 
WA_FKKCOLLERR_STR-MSGID sy-vline 
WA_FKKCOLLERR_STR-MSGNR sy-vline 
WA_FKKCOLLERR_STR-MSGV1 sy-vline 
WA_FKKCOLLERR_STR-MSGV2 sy-vline 
WA_FKKCOLLERR_STR-MSGV3 sy-vline 
WA_FKKCOLLERR_STR-MSGV4 sy-vline 
WA_FKKCOLLERR_STR-AMPEL sy-vline 
WA_FKKCOLLERR_STR-LINENR sy-vline 
WA_FKKCOLLERR_STR-TABNAME sy-vline 
WA_FKKCOLLERR_STR-FLDNAME sy-vline 
WA_FKKCOLLERR_STR-MSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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