ABAP Select data from SAP table MSR20_CUSTOMER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MSR20_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 MSR20_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 MSR20_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_MSR20_CUSTOMER TYPE STANDARD TABLE OF MSR20_CUSTOMER,
      WA_MSR20_CUSTOMER TYPE MSR20_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: <MSR20_CUSTOMER> TYPE MSR20_CUSTOMER.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MSR20_CUSTOMER.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MSR20_CUSTOMER
  INTO TABLE IT_MSR20_CUSTOMER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSR20_CUSTOMER
*  INTO TABLE @DATA(IT_MSR20_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_MSR20_CUSTOMER INDEX 1 INTO DATA(WA_MSR20_CUSTOMER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MSR20_CUSTOMER ASSIGNING <MSR20_CUSTOMER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSR20_CUSTOMER>-CUSTOMER_CODE = 1.
<MSR20_CUSTOMER>-SORT_FIELD = 1.
<MSR20_CUSTOMER>-FORM_OF_AD = 1.
<MSR20_CUSTOMER>-NAME = 1.
<MSR20_CUSTOMER>-NAME_2 = 1.

ENDLOOP.

LOOP AT IT_MSR20_CUSTOMER INTO WA_MSR20_CUSTOMER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSR20_CUSTOMER-NAME_3, sy-vline,
  WA_MSR20_CUSTOMER-NAME_4, sy-vline,
  WA_MSR20_CUSTOMER-DATE_BIRTH, sy-vline,
  WA_MSR20_CUSTOMER-HOUSE_NO, sy-vline,
  WA_MSR20_CUSTOMER-STREET, sy-vline,
  WA_MSR20_CUSTOMER-POSTL_COD1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSR20_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_MSR20_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_MSR20_CUSTOMER INTO WA_MSR20_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 CUSTOMER_CODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MSR20_CUSTOMER-CUSTOMER_CODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSR20_CUSTOMER-CUSTOMER_CODE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field DATE_BIRTH
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_MSR20_CUSTOMER-DATE_BIRTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSR20_CUSTOMER-DATE_BIRTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field E_MAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_MSR20_CUSTOMER-E_MAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSR20_CUSTOMER-E_MAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MSR20_CUSTOMER-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSR20_CUSTOMER-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VSORT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MSR20_CUSTOMER-VSORT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSR20_CUSTOMER-VSORT.
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_MSR20_CUSTOMER_STR, 
CUSTOMER_CODE TYPE STRING,
SORT_FIELD TYPE STRING,
FORM_OF_AD TYPE STRING,
NAME TYPE STRING,
NAME_2 TYPE STRING,
NAME_3 TYPE STRING,
NAME_4 TYPE STRING,
DATE_BIRTH TYPE STRING,
HOUSE_NO TYPE STRING,
STREET TYPE STRING,
POSTL_COD1 TYPE STRING,
CITY TYPE STRING,
REGION TYPE STRING,
COUNTRY TYPE STRING,
COUNTRYISO TYPE STRING,
E_MAIL TYPE STRING,
FAX_NUMBER TYPE STRING,
FAX_EXTENS TYPE STRING,
TEL1_NUMBR TYPE STRING,
TEL1_EXT TYPE STRING,
LANGU TYPE STRING,
LANGU_ISO TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
ONLY_CHANGE_COMADDRESS TYPE STRING,
ONE_TIME_FLAG TYPE STRING,
BLOCKED TYPE STRING,
SAL_DIS TYPE STRING,
SAL_DIV TYPE STRING,
SALES_ORG TYPE STRING,
ZTERM TYPE STRING,
VWERK TYPE STRING,
VSORT TYPE STRING,
SHIPPING_COND TYPE STRING,
PARTNER_EMPLOYEE TYPE STRING,
PAR_EMP_UNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSR20_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_MSR20_CUSTOMER_STR-CUSTOMER_CODE sy-vline 
WA_MSR20_CUSTOMER_STR-SORT_FIELD sy-vline 
WA_MSR20_CUSTOMER_STR-FORM_OF_AD sy-vline 
WA_MSR20_CUSTOMER_STR-NAME sy-vline 
WA_MSR20_CUSTOMER_STR-NAME_2 sy-vline 
WA_MSR20_CUSTOMER_STR-NAME_3 sy-vline 
WA_MSR20_CUSTOMER_STR-NAME_4 sy-vline 
WA_MSR20_CUSTOMER_STR-DATE_BIRTH sy-vline 
WA_MSR20_CUSTOMER_STR-HOUSE_NO sy-vline 
WA_MSR20_CUSTOMER_STR-STREET sy-vline 
WA_MSR20_CUSTOMER_STR-POSTL_COD1 sy-vline 
WA_MSR20_CUSTOMER_STR-CITY sy-vline 
WA_MSR20_CUSTOMER_STR-REGION sy-vline 
WA_MSR20_CUSTOMER_STR-COUNTRY sy-vline 
WA_MSR20_CUSTOMER_STR-COUNTRYISO sy-vline 
WA_MSR20_CUSTOMER_STR-E_MAIL sy-vline 
WA_MSR20_CUSTOMER_STR-FAX_NUMBER sy-vline 
WA_MSR20_CUSTOMER_STR-FAX_EXTENS sy-vline 
WA_MSR20_CUSTOMER_STR-TEL1_NUMBR sy-vline 
WA_MSR20_CUSTOMER_STR-TEL1_EXT sy-vline 
WA_MSR20_CUSTOMER_STR-LANGU sy-vline 
WA_MSR20_CUSTOMER_STR-LANGU_ISO sy-vline 
WA_MSR20_CUSTOMER_STR-CURRENCY sy-vline 
WA_MSR20_CUSTOMER_STR-CURRENCY_ISO sy-vline 
WA_MSR20_CUSTOMER_STR-ONLY_CHANGE_COMADDRESS sy-vline 
WA_MSR20_CUSTOMER_STR-ONE_TIME_FLAG sy-vline 
WA_MSR20_CUSTOMER_STR-BLOCKED sy-vline 
WA_MSR20_CUSTOMER_STR-SAL_DIS sy-vline 
WA_MSR20_CUSTOMER_STR-SAL_DIV sy-vline 
WA_MSR20_CUSTOMER_STR-SALES_ORG sy-vline 
WA_MSR20_CUSTOMER_STR-ZTERM sy-vline 
WA_MSR20_CUSTOMER_STR-VWERK sy-vline 
WA_MSR20_CUSTOMER_STR-VSORT sy-vline 
WA_MSR20_CUSTOMER_STR-SHIPPING_COND sy-vline 
WA_MSR20_CUSTOMER_STR-PARTNER_EMPLOYEE sy-vline 
WA_MSR20_CUSTOMER_STR-PAR_EMP_UNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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