ABAP Select data from SAP table JIT_LAB_HDREF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP JIT_LAB_HDREF 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_LAB_HDREF. 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_LAB_HDREF 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_LAB_HDREF TYPE STANDARD TABLE OF JIT_LAB_HDREF,
      WA_JIT_LAB_HDREF TYPE JIT_LAB_HDREF,
      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_LAB_HDREF> TYPE JIT_LAB_HDREF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JIT_LAB_HDREF
*  INTO TABLE @DATA(IT_JIT_LAB_HDREF2).
*--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_LAB_HDREF INDEX 1 INTO DATA(WA_JIT_LAB_HDREF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JIT_LAB_HDREF>-EXP = 1.
<JIT_LAB_HDREF>-MANDT = 1.
<JIT_LAB_HDREF>-JINUM = 1.
<JIT_LAB_HDREF>-CUSTO = 1.
<JIT_LAB_HDREF>-PRODN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JIT_LAB_HDREF-SEQNR, sy-vline,
  WA_JIT_LAB_HDREF-VETYP, sy-vline,
  WA_JIT_LAB_HDREF-VEHID, sy-vline,
  WA_JIT_LAB_HDREF-TEXHD, sy-vline,
  WA_JIT_LAB_HDREF-SSPEZ, sy-vline,
  WA_JIT_LAB_HDREF-NACHB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JIT_LAB_HDREF 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_LAB_HDREF 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_LAB_HDREF INTO WA_JIT_LAB_HDREF.


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

*Conversion exit ALPHA, internal->external for field KUNWE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JIT_LAB_HDREF-KUNWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JIT_LAB_HDREF-KUNWE.
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_LAB_HDREF_STR, 
EXP TYPE STRING,
MANDT TYPE STRING,
JINUM TYPE STRING,
CUSTO TYPE STRING,
PRODN TYPE STRING,
SEQNR TYPE STRING,
VETYP TYPE STRING,
VEHID TYPE STRING,
TEXHD TYPE STRING,
SSPEZ TYPE STRING,
NACHB TYPE STRING,
ABTYP TYPE STRING,
ARCHI TYPE STRING,
DDATA TYPE STRING,
RANGE TYPE STRING,
KUNNR TYPE STRING,
KNREF TYPE STRING,
ABRVW TYPE STRING,
TZONE TYPE STRING,
FPROF TYPE STRING,
VATYP TYPE STRING,
MTCH TYPE STRING,
IMPAC TYPE STRING,
MTMOD TYPE STRING,
CREHU TYPE STRING,
DON_PROFIL TYPE STRING,
PRIID TYPE STRING,
NOPCK TYPE STRING,
KUNWE TYPE STRING,
LPROF TYPE STRING,
RNPID TYPE STRING,
DLSLV TYPE STRING,
PRIVC TYPE STRING,
GIUPD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JIT_LAB_HDREF_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_LAB_HDREF_STR-EXP sy-vline 
WA_JIT_LAB_HDREF_STR-MANDT sy-vline 
WA_JIT_LAB_HDREF_STR-JINUM sy-vline 
WA_JIT_LAB_HDREF_STR-CUSTO sy-vline 
WA_JIT_LAB_HDREF_STR-PRODN sy-vline 
WA_JIT_LAB_HDREF_STR-SEQNR sy-vline 
WA_JIT_LAB_HDREF_STR-VETYP sy-vline 
WA_JIT_LAB_HDREF_STR-VEHID sy-vline 
WA_JIT_LAB_HDREF_STR-TEXHD sy-vline 
WA_JIT_LAB_HDREF_STR-SSPEZ sy-vline 
WA_JIT_LAB_HDREF_STR-NACHB sy-vline 
WA_JIT_LAB_HDREF_STR-ABTYP sy-vline 
WA_JIT_LAB_HDREF_STR-ARCHI sy-vline 
WA_JIT_LAB_HDREF_STR-DDATA sy-vline 
WA_JIT_LAB_HDREF_STR-RANGE sy-vline 
WA_JIT_LAB_HDREF_STR-KUNNR sy-vline 
WA_JIT_LAB_HDREF_STR-KNREF sy-vline 
WA_JIT_LAB_HDREF_STR-ABRVW sy-vline 
WA_JIT_LAB_HDREF_STR-TZONE sy-vline 
WA_JIT_LAB_HDREF_STR-FPROF sy-vline 
WA_JIT_LAB_HDREF_STR-VATYP sy-vline 
WA_JIT_LAB_HDREF_STR-MTCH sy-vline 
WA_JIT_LAB_HDREF_STR-IMPAC sy-vline 
WA_JIT_LAB_HDREF_STR-MTMOD sy-vline 
WA_JIT_LAB_HDREF_STR-CREHU sy-vline 
WA_JIT_LAB_HDREF_STR-DON_PROFIL sy-vline 
WA_JIT_LAB_HDREF_STR-PRIID sy-vline 
WA_JIT_LAB_HDREF_STR-NOPCK sy-vline 
WA_JIT_LAB_HDREF_STR-KUNWE sy-vline 
WA_JIT_LAB_HDREF_STR-LPROF sy-vline 
WA_JIT_LAB_HDREF_STR-RNPID sy-vline 
WA_JIT_LAB_HDREF_STR-DLSLV sy-vline 
WA_JIT_LAB_HDREF_STR-PRIVC sy-vline 
WA_JIT_LAB_HDREF_STR-GIUPD sy-vline      INTO ld_text SEPARATED BY SPACE.

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