ABAP Select data from SAP table TJL39 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TJL39 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 TJL39. 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 TJL39 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_TJL39 TYPE STANDARD TABLE OF TJL39,
      WA_TJL39 TYPE TJL39,
      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: <TJL39> TYPE TJL39.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TJL39.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TJL39
  INTO TABLE IT_TJL39.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TJL39
*  INTO TABLE @DATA(IT_TJL392).
*--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_TJL39 INDEX 1 INTO DATA(WA_TJL392).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TJL39 ASSIGNING <TJL39>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TJL39>-MANDT = 1.
<TJL39>-EKORG = 1.
<TJL39>-VERSERVGES = 1.
<TJL39>-LIEFERART = 1.
<TJL39>-BEZIRK = 1.

ENDLOOP.

LOOP AT IT_TJL39 INTO WA_TJL39.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TJL39-BEZRUNDE, sy-vline,
  WA_TJL39-DRERZ, sy-vline,
  WA_TJL39-DRUERZART, sy-vline,
  WA_TJL39-GUELTIGVON, sy-vline,
  WA_TJL39-JZUMOD, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_TJL39 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_TJL39 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_TJL39 INTO WA_TJL39.


*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 VERSERVGES
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TJL39-VERSERVGES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TJL39-VERSERVGES.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BEZIRK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TJL39-BEZIRK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TJL39-BEZIRK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BEZRUNDE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TJL39-BEZRUNDE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TJL39-BEZRUNDE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DRERZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TJL39-DRERZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TJL39-DRERZ.
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_TJL39_STR, 
MANDT TYPE STRING,
EKORG TYPE STRING,
VERSERVGES TYPE STRING,
LIEFERART TYPE STRING,
BEZIRK TYPE STRING,
BEZRUNDE TYPE STRING,
DRERZ TYPE STRING,
DRUERZART TYPE STRING,
GUELTIGVON TYPE STRING,
JZUMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TJL39_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_TJL39_STR-MANDT sy-vline 
WA_TJL39_STR-EKORG sy-vline 
WA_TJL39_STR-VERSERVGES sy-vline 
WA_TJL39_STR-LIEFERART sy-vline 
WA_TJL39_STR-BEZIRK sy-vline 
WA_TJL39_STR-BEZRUNDE sy-vline 
WA_TJL39_STR-DRERZ sy-vline 
WA_TJL39_STR-DRUERZART sy-vline 
WA_TJL39_STR-GUELTIGVON sy-vline 
WA_TJL39_STR-JZUMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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