ABAP Select data from SAP table TDS_CUSTOMER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_CUSTOMER 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_CUSTOMER. 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_CUSTOMER 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_CUSTOMER TYPE STANDARD TABLE OF TDS_CUSTOMER,
      WA_TDS_CUSTOMER TYPE TDS_CUSTOMER,
      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_CUSTOMER> TYPE TDS_CUSTOMER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_CUSTOMER
*  INTO TABLE @DATA(IT_TDS_CUSTOMER2).
*--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_CUSTOMER INDEX 1 INTO DATA(WA_TDS_CUSTOMER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_CUSTOMER>-KUNNR = 1.
<TDS_CUSTOMER>-VKORG = 1.
<TDS_CUSTOMER>-VTWEG = 1.
<TDS_CUSTOMER>-SPART = 1.
<TDS_CUSTOMER>-VKBUR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_CUSTOMER-VKGRP, sy-vline,
  WA_TDS_CUSTOMER-MCOD1, sy-vline,
  WA_TDS_CUSTOMER-MCOD2, sy-vline,
  WA_TDS_CUSTOMER-MCOD3, sy-vline,
  WA_TDS_CUSTOMER-SORTL, sy-vline,
  WA_TDS_CUSTOMER-NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_CUSTOMER 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_CUSTOMER 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_CUSTOMER INTO WA_TDS_CUSTOMER.


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

*Conversion exit SXIDN, internal->external for field SDEMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_TDS_CUSTOMER-SDEMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_CUSTOMER-SDEMAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field SDEMAIL_REF
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_TDS_CUSTOMER-SDEMAIL_REF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_CUSTOMER-SDEMAIL_REF.
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_CUSTOMER_STR, 
KUNNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
MCOD1 TYPE STRING,
MCOD2 TYPE STRING,
MCOD3 TYPE STRING,
SORTL TYPE STRING,
NAME TYPE STRING,
STREET TYPE STRING,
MC_STREET TYPE STRING,
STREET_NO TYPE STRING,
PCODE TYPE STRING,
CITY TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
TELF1 TYPE STRING,
AUFSDZ TYPE STRING,
AUFSDV TYPE STRING,
LIFSDZ TYPE STRING,
LIFSDV TYPE STRING,
FAKSDZ TYPE STRING,
FAKSDV TYPE STRING,
LOEVMZ TYPE STRING,
LOEVMV TYPE STRING,
NODEL TYPE STRING,
BUKRS TYPE STRING,
NAME2 TYPE STRING,
KLABC TYPE STRING,
KDGRP TYPE STRING,
KUKLA TYPE STRING,
HOMEPAGE TYPE STRING,
HOMEPAGE_REF TYPE STRING,
SDEMAIL TYPE STRING,
SDEMAIL_REF TYPE STRING,
TELFX TYPE STRING,
BEGRU TYPE STRING,
KTOKD TYPE STRING,
VKORG_T TYPE STRING,
VTWEG_T TYPE STRING,
SPART_T TYPE STRING,
VKBUR_T TYPE STRING,
VKGRP_T TYPE STRING,
BUKRS_T TYPE STRING,
KUKLA_T TYPE STRING,
KDGRP_T TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_CUSTOMER_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_CUSTOMER_STR-KUNNR sy-vline 
WA_TDS_CUSTOMER_STR-VKORG sy-vline 
WA_TDS_CUSTOMER_STR-VTWEG sy-vline 
WA_TDS_CUSTOMER_STR-SPART sy-vline 
WA_TDS_CUSTOMER_STR-VKBUR sy-vline 
WA_TDS_CUSTOMER_STR-VKGRP sy-vline 
WA_TDS_CUSTOMER_STR-MCOD1 sy-vline 
WA_TDS_CUSTOMER_STR-MCOD2 sy-vline 
WA_TDS_CUSTOMER_STR-MCOD3 sy-vline 
WA_TDS_CUSTOMER_STR-SORTL sy-vline 
WA_TDS_CUSTOMER_STR-NAME sy-vline 
WA_TDS_CUSTOMER_STR-STREET sy-vline 
WA_TDS_CUSTOMER_STR-MC_STREET sy-vline 
WA_TDS_CUSTOMER_STR-STREET_NO sy-vline 
WA_TDS_CUSTOMER_STR-PCODE sy-vline 
WA_TDS_CUSTOMER_STR-CITY sy-vline 
WA_TDS_CUSTOMER_STR-COUNTRY sy-vline 
WA_TDS_CUSTOMER_STR-REGION sy-vline 
WA_TDS_CUSTOMER_STR-TELF1 sy-vline 
WA_TDS_CUSTOMER_STR-AUFSDZ sy-vline 
WA_TDS_CUSTOMER_STR-AUFSDV sy-vline 
WA_TDS_CUSTOMER_STR-LIFSDZ sy-vline 
WA_TDS_CUSTOMER_STR-LIFSDV sy-vline 
WA_TDS_CUSTOMER_STR-FAKSDZ sy-vline 
WA_TDS_CUSTOMER_STR-FAKSDV sy-vline 
WA_TDS_CUSTOMER_STR-LOEVMZ sy-vline 
WA_TDS_CUSTOMER_STR-LOEVMV sy-vline 
WA_TDS_CUSTOMER_STR-NODEL sy-vline 
WA_TDS_CUSTOMER_STR-BUKRS sy-vline 
WA_TDS_CUSTOMER_STR-NAME2 sy-vline 
WA_TDS_CUSTOMER_STR-KLABC sy-vline 
WA_TDS_CUSTOMER_STR-KDGRP sy-vline 
WA_TDS_CUSTOMER_STR-KUKLA sy-vline 
WA_TDS_CUSTOMER_STR-HOMEPAGE sy-vline 
WA_TDS_CUSTOMER_STR-HOMEPAGE_REF sy-vline 
WA_TDS_CUSTOMER_STR-SDEMAIL sy-vline 
WA_TDS_CUSTOMER_STR-SDEMAIL_REF sy-vline 
WA_TDS_CUSTOMER_STR-TELFX sy-vline 
WA_TDS_CUSTOMER_STR-BEGRU sy-vline 
WA_TDS_CUSTOMER_STR-KTOKD sy-vline 
WA_TDS_CUSTOMER_STR-VKORG_T sy-vline 
WA_TDS_CUSTOMER_STR-VTWEG_T sy-vline 
WA_TDS_CUSTOMER_STR-SPART_T sy-vline 
WA_TDS_CUSTOMER_STR-VKBUR_T sy-vline 
WA_TDS_CUSTOMER_STR-VKGRP_T sy-vline 
WA_TDS_CUSTOMER_STR-BUKRS_T sy-vline 
WA_TDS_CUSTOMER_STR-KUKLA_T sy-vline 
WA_TDS_CUSTOMER_STR-KDGRP_T sy-vline      INTO ld_text SEPARATED BY SPACE.

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