ABAP Select data from SAP table TNODE02_A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TNODE02_A 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 TNODE02_A. 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 TNODE02_A 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_TNODE02_A TYPE STANDARD TABLE OF TNODE02_A,
      WA_TNODE02_A TYPE TNODE02_A,
      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: <TNODE02_A> TYPE TNODE02_A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TNODE02_A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TNODE02_A
  INTO TABLE IT_TNODE02_A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TNODE02_A
*  INTO TABLE @DATA(IT_TNODE02_A2).
*--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_TNODE02_A INDEX 1 INTO DATA(WA_TNODE02_A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TNODE02_A ASSIGNING <TNODE02_A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TNODE02_A>-TC_NAME = 1.
<TNODE02_A>-FUSER = 1.
<TNODE02_A>-FDATE = 1.
<TNODE02_A>-FTIME = 1.
<TNODE02_A>-FRELEASE = 1.

ENDLOOP.

LOOP AT IT_TNODE02_A INTO WA_TNODE02_A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TNODE02_A-LUSER, sy-vline,
  WA_TNODE02_A-LDATE, sy-vline,
  WA_TNODE02_A-LTIME, sy-vline,
  WA_TNODE02_A-LRELEASE, sy-vline,
  WA_TNODE02_A-TWB_TYP, sy-vline,
  WA_TNODE02_A-TWB_SYSTEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TNODE02_A 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_TNODE02_A 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_TNODE02_A INTO WA_TNODE02_A.


*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 SXIDN, internal->external for field TWB_RESP
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_TNODE02_A-TWB_RESP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNODE02_A-TWB_RESP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field TWB_WKUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TNODE02_A-TWB_WKUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNODE02_A-TWB_WKUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TWB_LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TNODE02_A-TWB_LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNODE02_A-TWB_LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TWB_DEPV_S
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TNODE02_A-TWB_DEPV_S
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNODE02_A-TWB_DEPV_S.
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_TNODE02_A_STR, 
TC_NAME TYPE STRING,
FUSER TYPE STRING,
FDATE TYPE STRING,
FTIME TYPE STRING,
FRELEASE TYPE STRING,
LUSER TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,
LRELEASE TYPE STRING,
TWB_TYP TYPE STRING,
TWB_SYSTEM TYPE STRING,
TWB_SYST_L TYPE STRING,
TWB_RESP TYPE STRING,
TWB_DISTL TYPE STRING,
TWB_REFTC TYPE STRING,
CLASS TYPE STRING,
OBJID TYPE STRING,
TWB_PRIO TYPE STRING,
TWB_WKREQ TYPE STRING,
TWB_WKUNIT TYPE STRING,
TWB_EUBOBJ TYPE STRING,
TWB_EUTYPE TYPE STRING,
TWB_EUOBJL TYPE STRING,
TWB_EUOBJT TYPE STRING,
TWB_DEVCLS TYPE STRING,
TWB_FRANGE TYPE STRING,
TWB_PRPE TYPE STRING,
TWB_EDTX TYPE STRING,
TWB_STATUS TYPE STRING,
TWB_RELE TYPE STRING,
TWB_LANGU TYPE STRING,
TWB_DEP_S TYPE STRING,
TWB_DEPV_S TYPE STRING,
TWB_DEP_L TYPE STRING,
TWB_DEPV_L TYPE STRING,
TWB_DEP_C TYPE STRING,
TWB_DEP_VC TYPE STRING,
TWB_DEP_F TYPE STRING,
TWB_DEP_VF TYPE STRING,
TWB_DEP_P TYPE STRING,
TWB_DEP_VP TYPE STRING,
PRODUCT_S TYPE STRING,
TWB_DEP_RF TYPE STRING,
TWB_DEP_RT TYPE STRING,
TWB_DEPRFT TYPE STRING,
TWB_DEP_DB TYPE STRING,
TWB_DEPVDB TYPE STRING,
TWB_USE_A TYPE STRING,
TWB_USE_P TYPE STRING,
TWB_USE_H TYPE STRING,
TWB_USE_E TYPE STRING,
TWB_S_TXT TYPE STRING,
DOC_ID TYPE STRING,
PRODUCT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TNODE02_A_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_TNODE02_A_STR-TC_NAME sy-vline 
WA_TNODE02_A_STR-FUSER sy-vline 
WA_TNODE02_A_STR-FDATE sy-vline 
WA_TNODE02_A_STR-FTIME sy-vline 
WA_TNODE02_A_STR-FRELEASE sy-vline 
WA_TNODE02_A_STR-LUSER sy-vline 
WA_TNODE02_A_STR-LDATE sy-vline 
WA_TNODE02_A_STR-LTIME sy-vline 
WA_TNODE02_A_STR-LRELEASE sy-vline 
WA_TNODE02_A_STR-TWB_TYP sy-vline 
WA_TNODE02_A_STR-TWB_SYSTEM sy-vline 
WA_TNODE02_A_STR-TWB_SYST_L sy-vline 
WA_TNODE02_A_STR-TWB_RESP sy-vline 
WA_TNODE02_A_STR-TWB_DISTL sy-vline 
WA_TNODE02_A_STR-TWB_REFTC sy-vline 
WA_TNODE02_A_STR-CLASS sy-vline 
WA_TNODE02_A_STR-OBJID sy-vline 
WA_TNODE02_A_STR-TWB_PRIO sy-vline 
WA_TNODE02_A_STR-TWB_WKREQ sy-vline 
WA_TNODE02_A_STR-TWB_WKUNIT sy-vline 
WA_TNODE02_A_STR-TWB_EUBOBJ sy-vline 
WA_TNODE02_A_STR-TWB_EUTYPE sy-vline 
WA_TNODE02_A_STR-TWB_EUOBJL sy-vline 
WA_TNODE02_A_STR-TWB_EUOBJT sy-vline 
WA_TNODE02_A_STR-TWB_DEVCLS sy-vline 
WA_TNODE02_A_STR-TWB_FRANGE sy-vline 
WA_TNODE02_A_STR-TWB_PRPE sy-vline 
WA_TNODE02_A_STR-TWB_EDTX sy-vline 
WA_TNODE02_A_STR-TWB_STATUS sy-vline 
WA_TNODE02_A_STR-TWB_RELE sy-vline 
WA_TNODE02_A_STR-TWB_LANGU sy-vline 
WA_TNODE02_A_STR-TWB_DEP_S sy-vline 
WA_TNODE02_A_STR-TWB_DEPV_S sy-vline 
WA_TNODE02_A_STR-TWB_DEP_L sy-vline 
WA_TNODE02_A_STR-TWB_DEPV_L sy-vline 
WA_TNODE02_A_STR-TWB_DEP_C sy-vline 
WA_TNODE02_A_STR-TWB_DEP_VC sy-vline 
WA_TNODE02_A_STR-TWB_DEP_F sy-vline 
WA_TNODE02_A_STR-TWB_DEP_VF sy-vline 
WA_TNODE02_A_STR-TWB_DEP_P sy-vline 
WA_TNODE02_A_STR-TWB_DEP_VP sy-vline 
WA_TNODE02_A_STR-PRODUCT_S sy-vline 
WA_TNODE02_A_STR-TWB_DEP_RF sy-vline 
WA_TNODE02_A_STR-TWB_DEP_RT sy-vline 
WA_TNODE02_A_STR-TWB_DEPRFT sy-vline 
WA_TNODE02_A_STR-TWB_DEP_DB sy-vline 
WA_TNODE02_A_STR-TWB_DEPVDB sy-vline 
WA_TNODE02_A_STR-TWB_USE_A sy-vline 
WA_TNODE02_A_STR-TWB_USE_P sy-vline 
WA_TNODE02_A_STR-TWB_USE_H sy-vline 
WA_TNODE02_A_STR-TWB_USE_E sy-vline 
WA_TNODE02_A_STR-TWB_S_TXT sy-vline 
WA_TNODE02_A_STR-DOC_ID sy-vline 
WA_TNODE02_A_STR-PRODUCT sy-vline      INTO ld_text SEPARATED BY SPACE.

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