ABAP Select data from SAP table KALAUSER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KALAUSER
*  INTO TABLE @DATA(IT_KALAUSER2).
*--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_KALAUSER INDEX 1 INTO DATA(WA_KALAUSER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KALAUSER>-MANDT = 1.
<KALAUSER>-KALUSER = 1.
<KALAUSER>-APPLICATION = 1.
<KALAUSER>-KALAID = 1.
<KALAUSER>-KALADAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KALAUSER-DISPLAY, sy-vline,
  WA_KALAUSER-COMSTATE, sy-vline,
  WA_KALAUSER-COMVISIBLE, sy-vline,
  WA_KALAUSER-PROCSTATE, sy-vline,
  WA_KALAUSER-PROCVISIBLE, sy-vline,
  WA_KALAUSER-RESSTATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KALAUSER 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_KALAUSER 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_KALAUSER INTO WA_KALAUSER.


*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_KALAUSER_STR, 
MANDT TYPE STRING,
KALUSER TYPE STRING,
APPLICATION TYPE STRING,
KALAID TYPE STRING,
KALADAT TYPE STRING,
DISPLAY TYPE STRING,
COMSTATE TYPE STRING,
COMVISIBLE TYPE STRING,
PROCSTATE TYPE STRING,
PROCVISIBLE TYPE STRING,
RESSTATE TYPE STRING,
RESSIZE TYPE STRING,
RESVISIBLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KALAUSER_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_KALAUSER_STR-MANDT sy-vline 
WA_KALAUSER_STR-KALUSER sy-vline 
WA_KALAUSER_STR-APPLICATION sy-vline 
WA_KALAUSER_STR-KALAID sy-vline 
WA_KALAUSER_STR-KALADAT sy-vline 
WA_KALAUSER_STR-DISPLAY sy-vline 
WA_KALAUSER_STR-COMSTATE sy-vline 
WA_KALAUSER_STR-COMVISIBLE sy-vline 
WA_KALAUSER_STR-PROCSTATE sy-vline 
WA_KALAUSER_STR-PROCVISIBLE sy-vline 
WA_KALAUSER_STR-RESSTATE sy-vline 
WA_KALAUSER_STR-RESSIZE sy-vline 
WA_KALAUSER_STR-RESVISIBLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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