ABAP Select data from SAP table TJKWBZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TJKWBZ
*  INTO TABLE @DATA(IT_TJKWBZ2).
*--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_TJKWBZ INDEX 1 INTO DATA(WA_TJKWBZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TJKWBZ>-MANDT = 1.
<TJKWBZ>-JKTOKD_WE = 1.
<TJKWBZ>-TDFORM_BEGLEIT = 1.
<TJKWBZ>-FILEINTERN_IN = 1.
<TJKWBZ>-FILEINTERN_ERR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TJKWBZ-FILEINTERN_OUT, sy-vline,
  WA_TJKWBZ-FILEINTERN_STOCK, sy-vline,
  WA_TJKWBZ-FILEINTERN_EXCHG, sy-vline,
  WA_TJKWBZ-TDPRINTER, sy-vline,
  WA_TJKWBZ-TDCOPIES, sy-vline,
  WA_TJKWBZ-TDIMMED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TJKWBZ 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_TJKWBZ 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_TJKWBZ INTO WA_TJKWBZ.


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

*Conversion exit SPDEV, internal->external for field TDPRINTER
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_TJKWBZ-TDPRINTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TJKWBZ-TDPRINTER.
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_TJKWBZ_STR, 
MANDT TYPE STRING,
JKTOKD_WE TYPE STRING,
TDFORM_BEGLEIT TYPE STRING,
FILEINTERN_IN TYPE STRING,
FILEINTERN_ERR TYPE STRING,
FILEINTERN_OUT TYPE STRING,
FILEINTERN_STOCK TYPE STRING,
FILEINTERN_EXCHG TYPE STRING,
TDPRINTER TYPE STRING,
TDCOPIES TYPE STRING,
TDIMMED TYPE STRING,
TDDELETE TYPE STRING,
TDLIFETIME TYPE STRING,
TDCOVER TYPE STRING,
TDCOVTITLE TYPE STRING,
DSNAM TYPE STRING,
DSUF1 TYPE STRING,
DSUF2 TYPE STRING,
TDRECEIVER TYPE STRING,
TDDIVISION TYPE STRING,
XONLY_GERM_ADDR TYPE STRING,
XPDU_ADR_CHANGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TJKWBZ_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_TJKWBZ_STR-MANDT sy-vline 
WA_TJKWBZ_STR-JKTOKD_WE sy-vline 
WA_TJKWBZ_STR-TDFORM_BEGLEIT sy-vline 
WA_TJKWBZ_STR-FILEINTERN_IN sy-vline 
WA_TJKWBZ_STR-FILEINTERN_ERR sy-vline 
WA_TJKWBZ_STR-FILEINTERN_OUT sy-vline 
WA_TJKWBZ_STR-FILEINTERN_STOCK sy-vline 
WA_TJKWBZ_STR-FILEINTERN_EXCHG sy-vline 
WA_TJKWBZ_STR-TDPRINTER sy-vline 
WA_TJKWBZ_STR-TDCOPIES sy-vline 
WA_TJKWBZ_STR-TDIMMED sy-vline 
WA_TJKWBZ_STR-TDDELETE sy-vline 
WA_TJKWBZ_STR-TDLIFETIME sy-vline 
WA_TJKWBZ_STR-TDCOVER sy-vline 
WA_TJKWBZ_STR-TDCOVTITLE sy-vline 
WA_TJKWBZ_STR-DSNAM sy-vline 
WA_TJKWBZ_STR-DSUF1 sy-vline 
WA_TJKWBZ_STR-DSUF2 sy-vline 
WA_TJKWBZ_STR-TDRECEIVER sy-vline 
WA_TJKWBZ_STR-TDDIVISION sy-vline 
WA_TJKWBZ_STR-XONLY_GERM_ADDR sy-vline 
WA_TJKWBZ_STR-XPDU_ADR_CHANGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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