ABAP Select data from SAP table TDS_RFC_IDFLOW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_RFC_IDFLOW 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_RFC_IDFLOW. 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_RFC_IDFLOW 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_RFC_IDFLOW TYPE STANDARD TABLE OF TDS_RFC_IDFLOW,
      WA_TDS_RFC_IDFLOW TYPE TDS_RFC_IDFLOW,
      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_RFC_IDFLOW> TYPE TDS_RFC_IDFLOW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_RFC_IDFLOW
*  INTO TABLE @DATA(IT_TDS_RFC_IDFLOW2).
*--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_RFC_IDFLOW INDEX 1 INTO DATA(WA_TDS_RFC_IDFLOW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_RFC_IDFLOW>-VBELN_N = 1.
<TDS_RFC_IDFLOW>-POSNR_N = 1.
<TDS_RFC_IDFLOW>-VBTYP_N = 1.
<TDS_RFC_IDFLOW>-VBELN_V = 1.
<TDS_RFC_IDFLOW>-POSNR_V = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_RFC_IDFLOW-VBTYP_V, sy-vline,
  WA_TDS_RFC_IDFLOW-DESCRIPTION, sy-vline,
  WA_TDS_RFC_IDFLOW-HLEVEL, sy-vline,
  WA_TDS_RFC_IDFLOW-VKORG, sy-vline,
  WA_TDS_RFC_IDFLOW-VTWEG, sy-vline,
  WA_TDS_RFC_IDFLOW-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_RFC_IDFLOW 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_RFC_IDFLOW 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_RFC_IDFLOW INTO WA_TDS_RFC_IDFLOW.


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

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

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

*Conversion exit MATN5, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_TDS_RFC_IDFLOW-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_RFC_IDFLOW-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATNR_LONG
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_TDS_RFC_IDFLOW-MATNR_LONG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_RFC_IDFLOW-MATNR_LONG.
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_RFC_IDFLOW_STR, 
VBELN_N TYPE STRING,
POSNR_N TYPE STRING,
VBTYP_N TYPE STRING,
VBELN_V TYPE STRING,
POSNR_V TYPE STRING,
VBTYP_V TYPE STRING,
DESCRIPTION TYPE STRING,
HLEVEL TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
STATUS TYPE STRING,
RFWRT TYPE STRING,
WAERS TYPE STRING,
RFMNG TYPE STRING,
MEINS TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
BWART TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
LGNUM TYPE STRING,
VBTYP_N_LONG TYPE STRING,
VBTYP_V_LONG TYPE STRING,
MATNR_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_RFC_IDFLOW_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_RFC_IDFLOW_STR-VBELN_N sy-vline 
WA_TDS_RFC_IDFLOW_STR-POSNR_N sy-vline 
WA_TDS_RFC_IDFLOW_STR-VBTYP_N sy-vline 
WA_TDS_RFC_IDFLOW_STR-VBELN_V sy-vline 
WA_TDS_RFC_IDFLOW_STR-POSNR_V sy-vline 
WA_TDS_RFC_IDFLOW_STR-VBTYP_V sy-vline 
WA_TDS_RFC_IDFLOW_STR-DESCRIPTION sy-vline 
WA_TDS_RFC_IDFLOW_STR-HLEVEL sy-vline 
WA_TDS_RFC_IDFLOW_STR-VKORG sy-vline 
WA_TDS_RFC_IDFLOW_STR-VTWEG sy-vline 
WA_TDS_RFC_IDFLOW_STR-ERDAT sy-vline 
WA_TDS_RFC_IDFLOW_STR-ERZET sy-vline 
WA_TDS_RFC_IDFLOW_STR-STATUS sy-vline 
WA_TDS_RFC_IDFLOW_STR-RFWRT sy-vline 
WA_TDS_RFC_IDFLOW_STR-WAERS sy-vline 
WA_TDS_RFC_IDFLOW_STR-RFMNG sy-vline 
WA_TDS_RFC_IDFLOW_STR-MEINS sy-vline 
WA_TDS_RFC_IDFLOW_STR-MATNR sy-vline 
WA_TDS_RFC_IDFLOW_STR-MAKTX sy-vline 
WA_TDS_RFC_IDFLOW_STR-BWART sy-vline 
WA_TDS_RFC_IDFLOW_STR-BUKRS sy-vline 
WA_TDS_RFC_IDFLOW_STR-GJAHR sy-vline 
WA_TDS_RFC_IDFLOW_STR-LGNUM sy-vline 
WA_TDS_RFC_IDFLOW_STR-VBTYP_N_LONG sy-vline 
WA_TDS_RFC_IDFLOW_STR-VBTYP_V_LONG sy-vline 
WA_TDS_RFC_IDFLOW_STR-MATNR_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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