ABAP Select data from SAP table TDS_IDFLOW_NODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_IDFLOW_NODE
*  INTO TABLE @DATA(IT_TDS_IDFLOW_NODE2).
*--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_TDS_IDFLOW_NODE INDEX 1 INTO DATA(WA_TDS_IDFLOW_NODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_IDFLOW_NODE>-ID = 1.
<TDS_IDFLOW_NODE>-TEXT = 1.
<TDS_IDFLOW_NODE>-PARENT_ID = 1.
<TDS_IDFLOW_NODE>-IS_LEAF = 1.
<TDS_IDFLOW_NODE>-EXPANDED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_IDFLOW_NODE-HANDLE_ITEM, sy-vline,
  WA_TDS_IDFLOW_NODE-DOCTYPE, sy-vline,
  WA_TDS_IDFLOW_NODE-DOCNUM, sy-vline,
  WA_TDS_IDFLOW_NODE-ITEMNUM, sy-vline,
  WA_TDS_IDFLOW_NODE-PRE_DOCNUM, sy-vline,
  WA_TDS_IDFLOW_NODE-PRE_ITEMNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_IDFLOW_NODE 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_TDS_IDFLOW_NODE 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_TDS_IDFLOW_NODE INTO WA_TDS_IDFLOW_NODE.


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

*Conversion exit ALPHA, internal->external for field PRE_DOCNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_IDFLOW_NODE-PRE_DOCNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_IDFLOW_NODE-PRE_DOCNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TDS_IDFLOW_NODE-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_IDFLOW_NODE-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_IDFLOW_NODE-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_IDFLOW_NODE-LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_TDS_IDFLOW_NODE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_IDFLOW_NODE-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TDS_IDFLOW_NODE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_IDFLOW_NODE-MEINS.
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_TDS_IDFLOW_NODE_STR, 
ID TYPE STRING,
TEXT TYPE STRING,
PARENT_ID TYPE STRING,
IS_LEAF TYPE STRING,
EXPANDED TYPE STRING,
HANDLE_ITEM TYPE STRING,
DOCTYPE TYPE STRING,
DOCNUM TYPE STRING,
ITEMNUM TYPE STRING,
PRE_DOCNUM TYPE STRING,
PRE_ITEMNUM TYPE STRING,
HIERARCHY_LEVEL TYPE STRING,
DESCRIPTION TYPE STRING,
ERZET TYPE STRING,
ERDAT TYPE STRING,
RFWRT TYPE STRING,
WAERS TYPE STRING,
STATUS TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
LOGSYS TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
RFMNG TYPE STRING,
MEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_IDFLOW_NODE_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_TDS_IDFLOW_NODE_STR-ID sy-vline 
WA_TDS_IDFLOW_NODE_STR-TEXT sy-vline 
WA_TDS_IDFLOW_NODE_STR-PARENT_ID sy-vline 
WA_TDS_IDFLOW_NODE_STR-IS_LEAF sy-vline 
WA_TDS_IDFLOW_NODE_STR-EXPANDED sy-vline 
WA_TDS_IDFLOW_NODE_STR-HANDLE_ITEM sy-vline 
WA_TDS_IDFLOW_NODE_STR-DOCTYPE sy-vline 
WA_TDS_IDFLOW_NODE_STR-DOCNUM sy-vline 
WA_TDS_IDFLOW_NODE_STR-ITEMNUM sy-vline 
WA_TDS_IDFLOW_NODE_STR-PRE_DOCNUM sy-vline 
WA_TDS_IDFLOW_NODE_STR-PRE_ITEMNUM sy-vline 
WA_TDS_IDFLOW_NODE_STR-HIERARCHY_LEVEL sy-vline 
WA_TDS_IDFLOW_NODE_STR-DESCRIPTION sy-vline 
WA_TDS_IDFLOW_NODE_STR-ERZET sy-vline 
WA_TDS_IDFLOW_NODE_STR-ERDAT sy-vline 
WA_TDS_IDFLOW_NODE_STR-RFWRT sy-vline 
WA_TDS_IDFLOW_NODE_STR-WAERS sy-vline 
WA_TDS_IDFLOW_NODE_STR-STATUS sy-vline 
WA_TDS_IDFLOW_NODE_STR-VKORG sy-vline 
WA_TDS_IDFLOW_NODE_STR-VTWEG sy-vline 
WA_TDS_IDFLOW_NODE_STR-BUKRS sy-vline 
WA_TDS_IDFLOW_NODE_STR-GJAHR sy-vline 
WA_TDS_IDFLOW_NODE_STR-LOGSYS sy-vline 
WA_TDS_IDFLOW_NODE_STR-MATNR sy-vline 
WA_TDS_IDFLOW_NODE_STR-MAKTX sy-vline 
WA_TDS_IDFLOW_NODE_STR-RFMNG sy-vline 
WA_TDS_IDFLOW_NODE_STR-MEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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