ABAP Select data from SAP table AHTGL_RFCR3_JITODIAHD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AHTGL_RFCR3_JITODIAHD 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 AHTGL_RFCR3_JITODIAHD. 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 AHTGL_RFCR3_JITODIAHD 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_AHTGL_RFCR3_JITODIAHD TYPE STANDARD TABLE OF AHTGL_RFCR3_JITODIAHD,
      WA_AHTGL_RFCR3_JITODIAHD TYPE AHTGL_RFCR3_JITODIAHD,
      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: <AHTGL_RFCR3_JITODIAHD> TYPE AHTGL_RFCR3_JITODIAHD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AHTGL_RFCR3_JITODIAHD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AHTGL_RFCR3_JITODIAHD
  INTO TABLE IT_AHTGL_RFCR3_JITODIAHD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AHTGL_RFCR3_JITODIAHD
*  INTO TABLE @DATA(IT_AHTGL_RFCR3_JITODIAHD2).
*--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_AHTGL_RFCR3_JITODIAHD INDEX 1 INTO DATA(WA_AHTGL_RFCR3_JITODIAHD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AHTGL_RFCR3_JITODIAHD ASSIGNING <AHTGL_RFCR3_JITODIAHD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AHTGL_RFCR3_JITODIAHD>-MANDT = 1.
<AHTGL_RFCR3_JITODIAHD>-OUTID = 1.
<AHTGL_RFCR3_JITODIAHD>-JCTYP = 1.
<AHTGL_RFCR3_JITODIAHD>-PRODN = 1.
<AHTGL_RFCR3_JITODIAHD>-SEQNR = 1.

ENDLOOP.

LOOP AT IT_AHTGL_RFCR3_JITODIAHD INTO WA_AHTGL_RFCR3_JITODIAHD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AHTGL_RFCR3_JITODIAHD-NACHB, sy-vline,
  WA_AHTGL_RFCR3_JITODIAHD-CREAT, sy-vline,
  WA_AHTGL_RFCR3_JITODIAHD-JINUM, sy-vline,
  WA_AHTGL_RFCR3_JITODIAHD-CUSTO, sy-vline,
  WA_AHTGL_RFCR3_JITODIAHD-VETYP, sy-vline,
  WA_AHTGL_RFCR3_JITODIAHD-VEHID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AHTGL_RFCR3_JITODIAHD 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_AHTGL_RFCR3_JITODIAHD 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_AHTGL_RFCR3_JITODIAHD INTO WA_AHTGL_RFCR3_JITODIAHD.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_AHTGL_RFCR3_JITODIAHD_STR, 
MANDT TYPE STRING,
OUTID TYPE STRING,
JCTYP TYPE STRING,
PRODN TYPE STRING,
SEQNR TYPE STRING,
NACHB TYPE STRING,
CREAT TYPE STRING,
JINUM TYPE STRING,
CUSTO TYPE STRING,
VETYP TYPE STRING,
VEHID TYPE STRING,
TEXHD TYPE STRING,
SSPEZ TYPE STRING,
ABTYP TYPE STRING,
ARCHI TYPE STRING,
DDATA TYPE STRING,
SEQNR_IN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AHTGL_RFCR3_JITODIAHD_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_AHTGL_RFCR3_JITODIAHD_STR-MANDT sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-OUTID sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-JCTYP sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-PRODN sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-SEQNR sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-NACHB sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-CREAT sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-JINUM sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-CUSTO sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-VETYP sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-VEHID sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-TEXHD sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-SSPEZ sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-ABTYP sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-ARCHI sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-DDATA sy-vline 
WA_AHTGL_RFCR3_JITODIAHD_STR-SEQNR_IN sy-vline      INTO ld_text SEPARATED BY SPACE.

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