ABAP Select data from SAP table TDS_MY_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_MY_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_MY_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_MY_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_MY_CUSTOMER TYPE STANDARD TABLE OF TDS_MY_CUSTOMER,
      WA_TDS_MY_CUSTOMER TYPE TDS_MY_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_MY_CUSTOMER> TYPE TDS_MY_CUSTOMER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_MY_CUSTOMER
*  INTO TABLE @DATA(IT_TDS_MY_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_MY_CUSTOMER INDEX 1 INTO DATA(WA_TDS_MY_CUSTOMER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_MY_CUSTOMER>-CUSTOMERID = 1.
<TDS_MY_CUSTOMER>-CUSTOMERNAME = 1.
<TDS_MY_CUSTOMER>-SALESORGANIZATION = 1.
<TDS_MY_CUSTOMER>-DISTRIBUTIONCHANNEL = 1.
<TDS_MY_CUSTOMER>-DIVISION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_MY_CUSTOMER-SALESORGNAME, sy-vline,
  WA_TDS_MY_CUSTOMER-DISTRIBUTIONCHANNELNAME, sy-vline,
  WA_TDS_MY_CUSTOMER-DIVISIONNAME, sy-vline,
  WA_TDS_MY_CUSTOMER-CITY, sy-vline,
  WA_TDS_MY_CUSTOMER-POSTALCODE, sy-vline,
  WA_TDS_MY_CUSTOMER-SEARCHTERM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_MY_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_MY_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_MY_CUSTOMER INTO WA_TDS_MY_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 CUSTOMERID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_MY_CUSTOMER-CUSTOMERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_MY_CUSTOMER-CUSTOMERID.
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_MY_CUSTOMER_STR, 
CUSTOMERID TYPE STRING,
CUSTOMERNAME TYPE STRING,
SALESORGANIZATION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
DIVISION TYPE STRING,
SALESORGNAME TYPE STRING,
DISTRIBUTIONCHANNELNAME TYPE STRING,
DIVISIONNAME TYPE STRING,
CITY TYPE STRING,
POSTALCODE TYPE STRING,
SEARCHTERM TYPE STRING,
DUMMY_INCLUDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_MY_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_MY_CUSTOMER_STR-CUSTOMERID sy-vline 
WA_TDS_MY_CUSTOMER_STR-CUSTOMERNAME sy-vline 
WA_TDS_MY_CUSTOMER_STR-SALESORGANIZATION sy-vline 
WA_TDS_MY_CUSTOMER_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_TDS_MY_CUSTOMER_STR-DIVISION sy-vline 
WA_TDS_MY_CUSTOMER_STR-SALESORGNAME sy-vline 
WA_TDS_MY_CUSTOMER_STR-DISTRIBUTIONCHANNELNAME sy-vline 
WA_TDS_MY_CUSTOMER_STR-DIVISIONNAME sy-vline 
WA_TDS_MY_CUSTOMER_STR-CITY sy-vline 
WA_TDS_MY_CUSTOMER_STR-POSTALCODE sy-vline 
WA_TDS_MY_CUSTOMER_STR-SEARCHTERM sy-vline 
WA_TDS_MY_CUSTOMER_STR-DUMMY_INCLUDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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