ABAP Select data from SAP table TDS_CONF_CHANGED into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_CONF_CHANGED 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_CONF_CHANGED. 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_CONF_CHANGED 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_CONF_CHANGED TYPE STANDARD TABLE OF TDS_CONF_CHANGED,
      WA_TDS_CONF_CHANGED TYPE TDS_CONF_CHANGED,
      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_CONF_CHANGED> TYPE TDS_CONF_CHANGED.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_CONF_CHANGED
*  INTO TABLE @DATA(IT_TDS_CONF_CHANGED2).
*--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_CONF_CHANGED INDEX 1 INTO DATA(WA_TDS_CONF_CHANGED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_CONF_CHANGED>-VBELN = 1.
<TDS_CONF_CHANGED>-KUNNR = 1.
<TDS_CONF_CHANGED>-MATNR = 1.
<TDS_CONF_CHANGED>-POSNR = 1.
<TDS_CONF_CHANGED>-ETENR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_CONF_CHANGED-EDATU_ALT, sy-vline,
  WA_TDS_CONF_CHANGED-EDATU_NEU, sy-vline,
  WA_TDS_CONF_CHANGED-WMENG, sy-vline,
  WA_TDS_CONF_CHANGED-BMENG_ALT, sy-vline,
  WA_TDS_CONF_CHANGED-BMENG_NEU, sy-vline,
  WA_TDS_CONF_CHANGED-VRKME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_CONF_CHANGED 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_CONF_CHANGED 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_CONF_CHANGED INTO WA_TDS_CONF_CHANGED.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field BANFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_CONF_CHANGED-BANFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_CONF_CHANGED-BANFN.
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_CONF_CHANGED_STR, 
VBELN TYPE STRING,
KUNNR TYPE STRING,
MATNR TYPE STRING,
POSNR TYPE STRING,
ETENR TYPE STRING,
EDATU_ALT TYPE STRING,
EDATU_NEU TYPE STRING,
WMENG TYPE STRING,
BMENG_ALT TYPE STRING,
BMENG_NEU TYPE STRING,
VRKME TYPE STRING,
VKGRP TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
UPDKZ TYPE STRING,
ISORT TYPE STRING,
ISORT_ET TYPE STRING,
ARKTX TYPE STRING,
NAME1 TYPE STRING,
BEZEI TYPE STRING,
TRVOG TYPE STRING,
WERKS TYPE STRING,
DOCTYPE TYPE STRING,
SGT_RCAT TYPE STRING,
POSAR TYPE STRING,
RESWK TYPE STRING,
EBELN TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
VKBUR TYPE STRING,
SPART TYPE STRING,
ZPERS TYPE STRING,
AUART TYPE STRING,
BANFN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_CONF_CHANGED_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_CONF_CHANGED_STR-VBELN sy-vline 
WA_TDS_CONF_CHANGED_STR-KUNNR sy-vline 
WA_TDS_CONF_CHANGED_STR-MATNR sy-vline 
WA_TDS_CONF_CHANGED_STR-POSNR sy-vline 
WA_TDS_CONF_CHANGED_STR-ETENR sy-vline 
WA_TDS_CONF_CHANGED_STR-EDATU_ALT sy-vline 
WA_TDS_CONF_CHANGED_STR-EDATU_NEU sy-vline 
WA_TDS_CONF_CHANGED_STR-WMENG sy-vline 
WA_TDS_CONF_CHANGED_STR-BMENG_ALT sy-vline 
WA_TDS_CONF_CHANGED_STR-BMENG_NEU sy-vline 
WA_TDS_CONF_CHANGED_STR-VRKME sy-vline 
WA_TDS_CONF_CHANGED_STR-VKGRP sy-vline 
WA_TDS_CONF_CHANGED_STR-ERNAM sy-vline 
WA_TDS_CONF_CHANGED_STR-ERDAT sy-vline 
WA_TDS_CONF_CHANGED_STR-UPDKZ sy-vline 
WA_TDS_CONF_CHANGED_STR-ISORT sy-vline 
WA_TDS_CONF_CHANGED_STR-ISORT_ET sy-vline 
WA_TDS_CONF_CHANGED_STR-ARKTX sy-vline 
WA_TDS_CONF_CHANGED_STR-NAME1 sy-vline 
WA_TDS_CONF_CHANGED_STR-BEZEI sy-vline 
WA_TDS_CONF_CHANGED_STR-TRVOG sy-vline 
WA_TDS_CONF_CHANGED_STR-WERKS sy-vline 
WA_TDS_CONF_CHANGED_STR-DOCTYPE sy-vline 
WA_TDS_CONF_CHANGED_STR-SGT_RCAT sy-vline 
WA_TDS_CONF_CHANGED_STR-POSAR sy-vline 
WA_TDS_CONF_CHANGED_STR-RESWK sy-vline 
WA_TDS_CONF_CHANGED_STR-EBELN sy-vline 
WA_TDS_CONF_CHANGED_STR-VKORG sy-vline 
WA_TDS_CONF_CHANGED_STR-VTWEG sy-vline 
WA_TDS_CONF_CHANGED_STR-VKBUR sy-vline 
WA_TDS_CONF_CHANGED_STR-SPART sy-vline 
WA_TDS_CONF_CHANGED_STR-ZPERS sy-vline 
WA_TDS_CONF_CHANGED_STR-AUART sy-vline 
WA_TDS_CONF_CHANGED_STR-BANFN sy-vline      INTO ld_text SEPARATED BY SPACE.

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