ABAP Select data from SAP table TDS_LODATA_OR_HEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_LODATA_OR_HEAD 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_LODATA_OR_HEAD. 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_LODATA_OR_HEAD 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_LODATA_OR_HEAD TYPE STANDARD TABLE OF TDS_LODATA_OR_HEAD,
      WA_TDS_LODATA_OR_HEAD TYPE TDS_LODATA_OR_HEAD,
      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_LODATA_OR_HEAD> TYPE TDS_LODATA_OR_HEAD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_LODATA_OR_HEAD
*  INTO TABLE @DATA(IT_TDS_LODATA_OR_HEAD2).
*--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_LODATA_OR_HEAD INDEX 1 INTO DATA(WA_TDS_LODATA_OR_HEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_LODATA_OR_HEAD>-VBELN = 1.
<TDS_LODATA_OR_HEAD>-AUART = 1.
<TDS_LODATA_OR_HEAD>-AUART_T = 1.
<TDS_LODATA_OR_HEAD>-VKORG = 1.
<TDS_LODATA_OR_HEAD>-VKORG_T = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_LODATA_OR_HEAD-VTWEG, sy-vline,
  WA_TDS_LODATA_OR_HEAD-VTWEG_T, sy-vline,
  WA_TDS_LODATA_OR_HEAD-SPART, sy-vline,
  WA_TDS_LODATA_OR_HEAD-SPART_T, sy-vline,
  WA_TDS_LODATA_OR_HEAD-KUNAG, sy-vline,
  WA_TDS_LODATA_OR_HEAD-KUNAG_T, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_LODATA_OR_HEAD 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_LODATA_OR_HEAD 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_LODATA_OR_HEAD INTO WA_TDS_LODATA_OR_HEAD.


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

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

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_LODATA_OR_HEAD-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_LODATA_OR_HEAD-KUNAG.
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_LODATA_OR_HEAD_STR, 
VBELN TYPE STRING,
AUART TYPE STRING,
AUART_T TYPE STRING,
VKORG TYPE STRING,
VKORG_T TYPE STRING,
VTWEG TYPE STRING,
VTWEG_T TYPE STRING,
SPART TYPE STRING,
SPART_T TYPE STRING,
KUNAG TYPE STRING,
KUNAG_T TYPE STRING,
BSTKD TYPE STRING,
BSTDK TYPE STRING,
VDATU TYPE STRING,
LIFSK TYPE STRING,
LIFSK_T TYPE STRING,
FAKSK TYPE STRING,
FAKSK_T TYPE STRING,
ERNAM_R TYPE STRING,
ERDAT_R TYPE STRING,
NETWR_R TYPE STRING,
ENDBK_R TYPE STRING,
MWSBK_R TYPE STRING,
WAERK TYPE STRING,
ZTERM TYPE STRING,
ZTERM_T TYPE STRING,
DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_LODATA_OR_HEAD_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_LODATA_OR_HEAD_STR-VBELN sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-AUART sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-AUART_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-VKORG sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-VKORG_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-VTWEG sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-VTWEG_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-SPART sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-SPART_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-KUNAG sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-KUNAG_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-BSTKD sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-BSTDK sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-VDATU sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-LIFSK sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-LIFSK_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-FAKSK sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-FAKSK_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-ERNAM_R sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-ERDAT_R sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-NETWR_R sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-ENDBK_R sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-MWSBK_R sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-WAERK sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-ZTERM sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-ZTERM_T sy-vline 
WA_TDS_LODATA_OR_HEAD_STR-DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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