ABAP Select data from SAP table TDS_SDOC_TEST_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_SDOC_TEST_ITEM 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_SDOC_TEST_ITEM. 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_SDOC_TEST_ITEM 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_SDOC_TEST_ITEM TYPE STANDARD TABLE OF TDS_SDOC_TEST_ITEM,
      WA_TDS_SDOC_TEST_ITEM TYPE TDS_SDOC_TEST_ITEM,
      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_SDOC_TEST_ITEM> TYPE TDS_SDOC_TEST_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_SDOC_TEST_ITEM
*  INTO TABLE @DATA(IT_TDS_SDOC_TEST_ITEM2).
*--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_SDOC_TEST_ITEM INDEX 1 INTO DATA(WA_TDS_SDOC_TEST_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_SDOC_TEST_ITEM>-GUID = 1.
<TDS_SDOC_TEST_ITEM>-VBELN = 1.
<TDS_SDOC_TEST_ITEM>-POSNR = 1.
<TDS_SDOC_TEST_ITEM>-UEPOS = 1.
<TDS_SDOC_TEST_ITEM>-PSTYV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_SDOC_TEST_ITEM-MATNR, sy-vline,
  WA_TDS_SDOC_TEST_ITEM-ARKTX, sy-vline,
  WA_TDS_SDOC_TEST_ITEM-KWMENG, sy-vline,
  WA_TDS_SDOC_TEST_ITEM-VRKME, sy-vline,
  WA_TDS_SDOC_TEST_ITEM-ABGRU, sy-vline,
  WA_TDS_SDOC_TEST_ITEM-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_SDOC_TEST_ITEM 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_SDOC_TEST_ITEM 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_SDOC_TEST_ITEM INTO WA_TDS_SDOC_TEST_ITEM.


*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_SDOC_TEST_ITEM-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_SDOC_TEST_ITEM-VBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TDS_SDOC_TEST_ITEM-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_SDOC_TEST_ITEM-VRKME.
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_SDOC_TEST_ITEM_STR, 
GUID TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
UEPOS TYPE STRING,
PSTYV TYPE STRING,
MATNR TYPE STRING,
ARKTX TYPE STRING,
KWMENG TYPE STRING,
VRKME TYPE STRING,
ABGRU TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_SDOC_TEST_ITEM_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_SDOC_TEST_ITEM_STR-GUID sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-VBELN sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-POSNR sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-UEPOS sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-PSTYV sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-MATNR sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-ARKTX sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-KWMENG sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-VRKME sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-ABGRU sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-ERNAM sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-ERDAT sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-ERZET sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-AENAM sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-AEDAT sy-vline 
WA_TDS_SDOC_TEST_ITEM_STR-AEZET sy-vline      INTO ld_text SEPARATED BY SPACE.

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