ABAP Select data from SAP table TKB9G into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP TKB9G 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 TKB9G. 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 TKB9G 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_TKB9G TYPE STANDARD TABLE OF TKB9G,
      WA_TKB9G TYPE TKB9G,
      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: <TKB9G> TYPE TKB9G.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TKB9G.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TKB9G
  INTO TABLE IT_TKB9G.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKB9G
*  INTO TABLE @DATA(IT_TKB9G2).
*--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_TKB9G INDEX 1 INTO DATA(WA_TKB9G2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TKB9G ASSIGNING <TKB9G>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKB9G>-MANDT = 1.
<TKB9G>-ERSCH = 1.
<TKB9G>-ERZUO = 1.
<TKB9G>-KOKRS = 1.
<TKB9G>-CLASS = 1.

ENDLOOP.

LOOP AT IT_TKB9G INTO WA_TKB9G.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKB9G-SETNR, sy-vline,
  WA_TKB9G-VALMIN, sy-vline,
  WA_TKB9G-VALMAX, sy-vline,
  WA_TKB9G-ABKAT, sy-vline,
  WA_TKB9G-BEMOT, sy-vline,
  WA_TKB9G-RECIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKB9G 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_TKB9G 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_TKB9G INTO WA_TKB9G.


*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 ERSCH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TKB9G-ERSCH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKB9G-ERSCH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERZUO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TKB9G-ERZUO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKB9G-ERZUO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABKAT, internal->external for field ABKAT
CALL FUNCTION 'CONVERSION_EXIT_ABKAT_OUTPUT'
  EXPORTING
    input =                      WA_TKB9G-ABKAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKB9G-ABKAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECIND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TKB9G-RECIND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKB9G-RECIND.
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_TKB9G_STR, 
MANDT TYPE STRING,
ERSCH TYPE STRING,
ERZUO TYPE STRING,
KOKRS TYPE STRING,
CLASS TYPE STRING,
SETNR TYPE STRING,
VALMIN TYPE STRING,
VALMAX TYPE STRING,
ABKAT TYPE STRING,
BEMOT TYPE STRING,
RECIND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKB9G_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_TKB9G_STR-MANDT sy-vline 
WA_TKB9G_STR-ERSCH sy-vline 
WA_TKB9G_STR-ERZUO sy-vline 
WA_TKB9G_STR-KOKRS sy-vline 
WA_TKB9G_STR-CLASS sy-vline 
WA_TKB9G_STR-SETNR sy-vline 
WA_TKB9G_STR-VALMIN sy-vline 
WA_TKB9G_STR-VALMAX sy-vline 
WA_TKB9G_STR-ABKAT sy-vline 
WA_TKB9G_STR-BEMOT sy-vline 
WA_TKB9G_STR-RECIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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