ABAP Select data from SAP table USMDZ_S_CCTRG_HIENODES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USMDZ_S_CCTRG_HIENODES
*  INTO TABLE @DATA(IT_USMDZ_S_CCTRG_HIENODES2).
*--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_USMDZ_S_CCTRG_HIENODES INDEX 1 INTO DATA(WA_USMDZ_S_CCTRG_HIENODES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USMDZ_S_CCTRG_HIENODES>-NODEID = 1.
<USMDZ_S_CCTRG_HIENODES>-IOBJNM = 1.
<USMDZ_S_CCTRG_HIENODES>-NODENAME = 1.
<USMDZ_S_CCTRG_HIENODES>-TLEVEL = 1.
<USMDZ_S_CCTRG_HIENODES>-LINK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USMDZ_S_CCTRG_HIENODES-PARENTID, sy-vline,
  WA_USMDZ_S_CCTRG_HIENODES-CHILDID, sy-vline,
  WA_USMDZ_S_CCTRG_HIENODES-NEXTID, sy-vline,
  WA_USMDZ_S_CCTRG_HIENODES-DATEFROM, sy-vline,
  WA_USMDZ_S_CCTRG_HIENODES-DATETO, sy-vline,
  WA_USMDZ_S_CCTRG_HIENODES-INTERVL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USMDZ_S_CCTRG_HIENODES 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_USMDZ_S_CCTRG_HIENODES 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_USMDZ_S_CCTRG_HIENODES INTO WA_USMDZ_S_CCTRG_HIENODES.


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

*Conversion exit ALPHA, internal->external for field CCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_USMDZ_S_CCTRG_HIENODES-CCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USMDZ_S_CCTRG_HIENODES-CCTR.
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_USMDZ_S_CCTRG_HIENODES_STR, 
NODEID TYPE STRING,
IOBJNM TYPE STRING,
NODENAME TYPE STRING,
TLEVEL TYPE STRING,
LINK TYPE STRING,
PARENTID TYPE STRING,
CHILDID TYPE STRING,
NEXTID TYPE STRING,
DATEFROM TYPE STRING,
DATETO TYPE STRING,
INTERVL TYPE STRING,
FIELDNM TYPE STRING,
COAREA TYPE STRING,
CCTRH TYPE STRING,
CCTRG TYPE STRING,
CCTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USMDZ_S_CCTRG_HIENODES_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_USMDZ_S_CCTRG_HIENODES_STR-NODEID sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-IOBJNM sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-NODENAME sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-TLEVEL sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-LINK sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-PARENTID sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-CHILDID sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-NEXTID sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-DATEFROM sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-DATETO sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-INTERVL sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-FIELDNM sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-COAREA sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-CCTRH sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-CCTRG sy-vline 
WA_USMDZ_S_CCTRG_HIENODES_STR-CCTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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