ABAP Select data from SAP table XKALXKAG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM XKALXKAG
*  INTO TABLE @DATA(IT_XKALXKAG2).
*--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_XKALXKAG INDEX 1 INTO DATA(WA_XKALXKAG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<XKALXKAG>-VERSA = 1.
<XKALXKAG>-ABGSL = 1.
<XKALXKAG>-ABGRJ = 1.
<XKALXKAG>-ABGRM = 1.
<XKALXKAG>-KNDE1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_XKALXKAG-TWAER, sy-vline,
  WA_XKALXKAG-BASIS, sy-vline,
  WA_XKALXKAG-PLKOS, sy-vline,
  WA_XKALXKAG-PLERL, sy-vline,
  WA_XKALXKAG-PLMNG, sy-vline,
  WA_XKALXKAG-PLMNG_EINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_XKALXKAG 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_XKALXKAG 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_XKALXKAG INTO WA_XKALXKAG.


*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 ALPHA, internal->external for field VERSA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_XKALXKAG-VERSA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_XKALXKAG-VERSA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field ABGRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_XKALXKAG-ABGRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_XKALXKAG-ABGRJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PLKOS
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_XKALXKAG-PLKOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_XKALXKAG-PLKOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PLERL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_XKALXKAG-PLERL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_XKALXKAG-PLERL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PLMNG_EINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_XKALXKAG-PLMNG_EINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_XKALXKAG-PLMNG_EINH.
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_XKALXKAG_STR, 
VERSA TYPE STRING,
ABGSL TYPE STRING,
ABGRJ TYPE STRING,
ABGRM TYPE STRING,
KNDE1 TYPE STRING,
TWAER TYPE STRING,
BASIS TYPE STRING,
PLKOS TYPE STRING,
PLERL TYPE STRING,
PLMNG TYPE STRING,
PLMNG_EINH TYPE STRING,
CUR_PERIOD TYPE STRING,
ABS_PERIOD TYPE STRING,
BOF_PERIOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_XKALXKAG_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_XKALXKAG_STR-VERSA sy-vline 
WA_XKALXKAG_STR-ABGSL sy-vline 
WA_XKALXKAG_STR-ABGRJ sy-vline 
WA_XKALXKAG_STR-ABGRM sy-vline 
WA_XKALXKAG_STR-KNDE1 sy-vline 
WA_XKALXKAG_STR-TWAER sy-vline 
WA_XKALXKAG_STR-BASIS sy-vline 
WA_XKALXKAG_STR-PLKOS sy-vline 
WA_XKALXKAG_STR-PLERL sy-vline 
WA_XKALXKAG_STR-PLMNG sy-vline 
WA_XKALXKAG_STR-PLMNG_EINH sy-vline 
WA_XKALXKAG_STR-CUR_PERIOD sy-vline 
WA_XKALXKAG_STR-ABS_PERIOD sy-vline 
WA_XKALXKAG_STR-BOF_PERIOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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