ABAP Select data from SAP table CUS_S_GEN_D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CUS_S_GEN_D 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 CUS_S_GEN_D. 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 CUS_S_GEN_D 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_CUS_S_GEN_D TYPE STANDARD TABLE OF CUS_S_GEN_D,
      WA_CUS_S_GEN_D TYPE CUS_S_GEN_D,
      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: <CUS_S_GEN_D> TYPE CUS_S_GEN_D.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CUS_S_GEN_D
*  INTO TABLE @DATA(IT_CUS_S_GEN_D2).
*--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_CUS_S_GEN_D INDEX 1 INTO DATA(WA_CUS_S_GEN_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CUS_S_GEN_D>-BUSINESSPARTNER = 1.
<CUS_S_GEN_D>-BUSINESSPARTNERUUID = 1.
<CUS_S_GEN_D>-BUSINESSPARTNERFOREDIT = 1.
<CUS_S_GEN_D>-CUSTOMER = 1.
<CUS_S_GEN_D>-CUSTOMERACCOUNTGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CUS_S_GEN_D-KTOKK, sy-vline,
  WA_CUS_S_GEN_D-ALTERNATIVEPAYERACCOUNT, sy-vline,
  WA_CUS_S_GEN_D-DATAMEDIUMEXCHANGEINDICATOR, sy-vline,
  WA_CUS_S_GEN_D-SUPPLIER, sy-vline,
  WA_CUS_S_GEN_D-CUSTOMERCLASSIFICATION, sy-vline,
  WA_CUS_S_GEN_D-VATLIABILITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CUS_S_GEN_D 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_CUS_S_GEN_D 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_CUS_S_GEN_D INTO WA_CUS_S_GEN_D.


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

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

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

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

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CUS_S_GEN_D-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CUS_S_GEN_D-SUPPLIER.
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_CUS_S_GEN_D_STR, 
BUSINESSPARTNER TYPE STRING,
BUSINESSPARTNERUUID TYPE STRING,
BUSINESSPARTNERFOREDIT TYPE STRING,
CUSTOMER TYPE STRING,
CUSTOMERACCOUNTGROUP TYPE STRING,
KTOKK TYPE STRING,
ALTERNATIVEPAYERACCOUNT TYPE STRING,
DATAMEDIUMEXCHANGEINDICATOR TYPE STRING,
SUPPLIER TYPE STRING,
CUSTOMERCLASSIFICATION TYPE STRING,
VATLIABILITY TYPE STRING,
POSTINGISBLOCKED TYPE STRING,
DELIVERYISBLOCKED TYPE STRING,
BILLINGISBLOCKEDFORCUSTOMER TYPE STRING,
ORDERISBLOCKEDFORCUSTOMER TYPE STRING,
ISNATURALPERSON TYPE STRING,
KNA1_EEW_CUST TYPE STRING,
RULE_EXCLUSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CUS_S_GEN_D_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_CUS_S_GEN_D_STR-BUSINESSPARTNER sy-vline 
WA_CUS_S_GEN_D_STR-BUSINESSPARTNERUUID sy-vline 
WA_CUS_S_GEN_D_STR-BUSINESSPARTNERFOREDIT sy-vline 
WA_CUS_S_GEN_D_STR-CUSTOMER sy-vline 
WA_CUS_S_GEN_D_STR-CUSTOMERACCOUNTGROUP sy-vline 
WA_CUS_S_GEN_D_STR-KTOKK sy-vline 
WA_CUS_S_GEN_D_STR-ALTERNATIVEPAYERACCOUNT sy-vline 
WA_CUS_S_GEN_D_STR-DATAMEDIUMEXCHANGEINDICATOR sy-vline 
WA_CUS_S_GEN_D_STR-SUPPLIER sy-vline 
WA_CUS_S_GEN_D_STR-CUSTOMERCLASSIFICATION sy-vline 
WA_CUS_S_GEN_D_STR-VATLIABILITY sy-vline 
WA_CUS_S_GEN_D_STR-POSTINGISBLOCKED sy-vline 
WA_CUS_S_GEN_D_STR-DELIVERYISBLOCKED sy-vline 
WA_CUS_S_GEN_D_STR-BILLINGISBLOCKEDFORCUSTOMER sy-vline 
WA_CUS_S_GEN_D_STR-ORDERISBLOCKEDFORCUSTOMER sy-vline 
WA_CUS_S_GEN_D_STR-ISNATURALPERSON sy-vline 
WA_CUS_S_GEN_D_STR-KNA1_EEW_CUST sy-vline 
WA_CUS_S_GEN_D_STR-RULE_EXCLUSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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