ABAP Select data from SAP table JITDIAHD into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP JITDIAHD 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 JITDIAHD. 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 JITDIAHD 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_JITDIAHD TYPE STANDARD TABLE OF JITDIAHD,
      WA_JITDIAHD TYPE JITDIAHD,
      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: <JITDIAHD> TYPE JITDIAHD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JITDIAHD
*  INTO TABLE @DATA(IT_JITDIAHD2).
*--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_JITDIAHD INDEX 1 INTO DATA(WA_JITDIAHD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JITDIAHD>-MANDT = 1.
<JITDIAHD>-JINUM = 1.
<JITDIAHD>-CUSTO = 1.
<JITDIAHD>-LIFNR = 1.
<JITDIAHD>-KUNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JITDIAHD-KNREF, sy-vline,
  WA_JITDIAHD-ABRVW, sy-vline,
  WA_JITDIAHD-TZONE, sy-vline,
  WA_JITDIAHD-FPROF, sy-vline,
  WA_JITDIAHD-VATYP, sy-vline,
  WA_JITDIAHD-MTCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JITDIAHD 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_JITDIAHD 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_JITDIAHD INTO WA_JITDIAHD.


*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_JITDIAHD-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JITDIAHD-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNWE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JITDIAHD-KUNWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JITDIAHD-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_JITDIAHD_STR, 
MANDT TYPE STRING,
JINUM TYPE STRING,
CUSTO TYPE STRING,
LIFNR 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,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
STRAS TYPE STRING,
LAND1 TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
PERIV 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,
REFTY1 TYPE STRING,
LEVTY1 TYPE STRING,
REFTX1 TYPE STRING,
REFTY2 TYPE STRING,
LEVTY2 TYPE STRING,
REFTX2 TYPE STRING,
REFTY3 TYPE STRING,
LEVTY3 TYPE STRING,
REFTX3 TYPE STRING,
EDI_DOCNUM TYPE STRING,
MATIP TYPE STRING,
SELKZ TYPE STRING,
V_JINUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JITDIAHD_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_JITDIAHD_STR-MANDT sy-vline 
WA_JITDIAHD_STR-JINUM sy-vline 
WA_JITDIAHD_STR-CUSTO sy-vline 
WA_JITDIAHD_STR-LIFNR sy-vline 
WA_JITDIAHD_STR-KUNNR sy-vline 
WA_JITDIAHD_STR-KNREF sy-vline 
WA_JITDIAHD_STR-ABRVW sy-vline 
WA_JITDIAHD_STR-TZONE sy-vline 
WA_JITDIAHD_STR-FPROF sy-vline 
WA_JITDIAHD_STR-VATYP sy-vline 
WA_JITDIAHD_STR-MTCH sy-vline 
WA_JITDIAHD_STR-IMPAC sy-vline 
WA_JITDIAHD_STR-MTMOD sy-vline 
WA_JITDIAHD_STR-CREHU sy-vline 
WA_JITDIAHD_STR-DON_PROFIL sy-vline 
WA_JITDIAHD_STR-PRIID sy-vline 
WA_JITDIAHD_STR-NOPCK sy-vline 
WA_JITDIAHD_STR-KUNWE sy-vline 
WA_JITDIAHD_STR-LPROF sy-vline 
WA_JITDIAHD_STR-RNPID sy-vline 
WA_JITDIAHD_STR-DLSLV sy-vline 
WA_JITDIAHD_STR-PRIVC sy-vline 
WA_JITDIAHD_STR-GIUPD sy-vline 
WA_JITDIAHD_STR-NAME1 sy-vline 
WA_JITDIAHD_STR-NAME2 sy-vline 
WA_JITDIAHD_STR-NAME3 sy-vline 
WA_JITDIAHD_STR-NAME4 sy-vline 
WA_JITDIAHD_STR-STRAS sy-vline 
WA_JITDIAHD_STR-LAND1 sy-vline 
WA_JITDIAHD_STR-PSTLZ sy-vline 
WA_JITDIAHD_STR-ORT01 sy-vline 
WA_JITDIAHD_STR-ORT02 sy-vline 
WA_JITDIAHD_STR-PERIV sy-vline 
WA_JITDIAHD_STR-PRODN sy-vline 
WA_JITDIAHD_STR-SEQNR sy-vline 
WA_JITDIAHD_STR-VETYP sy-vline 
WA_JITDIAHD_STR-VEHID sy-vline 
WA_JITDIAHD_STR-TEXHD sy-vline 
WA_JITDIAHD_STR-SSPEZ sy-vline 
WA_JITDIAHD_STR-NACHB sy-vline 
WA_JITDIAHD_STR-ABTYP sy-vline 
WA_JITDIAHD_STR-ARCHI sy-vline 
WA_JITDIAHD_STR-DDATA sy-vline 
WA_JITDIAHD_STR-RANGE sy-vline 
WA_JITDIAHD_STR-REFTY1 sy-vline 
WA_JITDIAHD_STR-LEVTY1 sy-vline 
WA_JITDIAHD_STR-REFTX1 sy-vline 
WA_JITDIAHD_STR-REFTY2 sy-vline 
WA_JITDIAHD_STR-LEVTY2 sy-vline 
WA_JITDIAHD_STR-REFTX2 sy-vline 
WA_JITDIAHD_STR-REFTY3 sy-vline 
WA_JITDIAHD_STR-LEVTY3 sy-vline 
WA_JITDIAHD_STR-REFTX3 sy-vline 
WA_JITDIAHD_STR-EDI_DOCNUM sy-vline 
WA_JITDIAHD_STR-MATIP sy-vline 
WA_JITDIAHD_STR-SELKZ sy-vline 
WA_JITDIAHD_STR-V_JINUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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