ABAP Select data from SAP table JIT_KMP_LISTE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JIT_KMP_LISTE
*  INTO TABLE @DATA(IT_JIT_KMP_LISTE2).
*--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_JIT_KMP_LISTE INDEX 1 INTO DATA(WA_JIT_KMP_LISTE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JIT_KMP_LISTE>-SEL = 1.
<JIT_KMP_LISTE>-MATID = 1.
<JIT_KMP_LISTE>-MATNR = 1.
<JIT_KMP_LISTE>-MICON = 1.
<JIT_KMP_LISTE>-KDMAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JIT_KMP_LISTE-MAKTX, sy-vline,
  WA_JIT_KMP_LISTE-LABST, sy-vline,
  WA_JIT_KMP_LISTE-DIFF, sy-vline,
  WA_JIT_KMP_LISTE-RUECK, sy-vline,
  WA_JIT_KMP_LISTE-PREV, sy-vline,
  WA_JIT_KMP_LISTE-ACT0, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JIT_KMP_LISTE 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_JIT_KMP_LISTE 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_JIT_KMP_LISTE INTO WA_JIT_KMP_LISTE.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_JIT_KMP_LISTE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JIT_KMP_LISTE-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_JIT_KMP_LISTE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JIT_KMP_LISTE-MEINS.
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_JIT_KMP_LISTE_STR, 
SEL TYPE STRING,
MATID TYPE STRING,
MATNR TYPE STRING,
MICON TYPE STRING,
KDMAT TYPE STRING,
MAKTX TYPE STRING,
LABST TYPE STRING,
DIFF TYPE STRING,
RUECK TYPE STRING,
PREV TYPE STRING,
ACT0 TYPE STRING,
ACT1 TYPE STRING,
ACT2 TYPE STRING,
ACT3 TYPE STRING,
ACT4 TYPE STRING,
ACT5 TYPE STRING,
REST TYPE STRING,
QUANT TYPE STRING,
MEINS TYPE STRING,
MAABC TYPE STRING,
BAFLU TYPE STRING,
WERKS TYPE STRING,
KLABS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JIT_KMP_LISTE_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_JIT_KMP_LISTE_STR-SEL sy-vline 
WA_JIT_KMP_LISTE_STR-MATID sy-vline 
WA_JIT_KMP_LISTE_STR-MATNR sy-vline 
WA_JIT_KMP_LISTE_STR-MICON sy-vline 
WA_JIT_KMP_LISTE_STR-KDMAT sy-vline 
WA_JIT_KMP_LISTE_STR-MAKTX sy-vline 
WA_JIT_KMP_LISTE_STR-LABST sy-vline 
WA_JIT_KMP_LISTE_STR-DIFF sy-vline 
WA_JIT_KMP_LISTE_STR-RUECK sy-vline 
WA_JIT_KMP_LISTE_STR-PREV sy-vline 
WA_JIT_KMP_LISTE_STR-ACT0 sy-vline 
WA_JIT_KMP_LISTE_STR-ACT1 sy-vline 
WA_JIT_KMP_LISTE_STR-ACT2 sy-vline 
WA_JIT_KMP_LISTE_STR-ACT3 sy-vline 
WA_JIT_KMP_LISTE_STR-ACT4 sy-vline 
WA_JIT_KMP_LISTE_STR-ACT5 sy-vline 
WA_JIT_KMP_LISTE_STR-REST sy-vline 
WA_JIT_KMP_LISTE_STR-QUANT sy-vline 
WA_JIT_KMP_LISTE_STR-MEINS sy-vline 
WA_JIT_KMP_LISTE_STR-MAABC sy-vline 
WA_JIT_KMP_LISTE_STR-BAFLU sy-vline 
WA_JIT_KMP_LISTE_STR-WERKS sy-vline 
WA_JIT_KMP_LISTE_STR-KLABS sy-vline      INTO ld_text SEPARATED BY SPACE.

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