ABAP Select data from SAP table U_27028 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_27028 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 U_27028. 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 U_27028 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_U_27028 TYPE STANDARD TABLE OF U_27028,
      WA_U_27028 TYPE U_27028,
      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: <U_27028> TYPE U_27028.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_27028.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_27028
  INTO TABLE IT_U_27028.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_27028
*  INTO TABLE @DATA(IT_U_270282).
*--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_U_27028 INDEX 1 INTO DATA(WA_U_270282).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_27028 ASSIGNING <U_27028>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_27028>-MANDT = 1.
<U_27028>-MOREI = 1.
<U_27028>-KZPAH = 1.
<U_27028>-KZREA = 1.
<U_27028>-KZTKT = 1.

ENDLOOP.

LOOP AT IT_U_27028 INTO WA_U_27028.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_27028-LNDGR, sy-vline,
  WA_U_27028-RGION, sy-vline,
  WA_U_27028-BEREI, sy-vline,
  WA_U_27028-ERKLA, sy-vline,
  WA_U_27028-ERGRU, sy-vline,
  WA_U_27028-ANZTA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_27028 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_U_27028 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_U_27028 INTO WA_U_27028.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_U_27028_STR, 
MANDT TYPE STRING,
MOREI TYPE STRING,
KZPAH TYPE STRING,
KZREA TYPE STRING,
KZTKT TYPE STRING,
LNDGR TYPE STRING,
RGION TYPE STRING,
BEREI TYPE STRING,
ERKLA TYPE STRING,
ERGRU TYPE STRING,
ANZTA TYPE STRING,
ANSTD TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
NUMFZ TYPE STRING,
NUMFA TYPE STRING,
DENTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_27028_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_U_27028_STR-MANDT sy-vline 
WA_U_27028_STR-MOREI sy-vline 
WA_U_27028_STR-KZPAH sy-vline 
WA_U_27028_STR-KZREA sy-vline 
WA_U_27028_STR-KZTKT sy-vline 
WA_U_27028_STR-LNDGR sy-vline 
WA_U_27028_STR-RGION sy-vline 
WA_U_27028_STR-BEREI sy-vline 
WA_U_27028_STR-ERKLA sy-vline 
WA_U_27028_STR-ERGRU sy-vline 
WA_U_27028_STR-ANZTA sy-vline 
WA_U_27028_STR-ANSTD sy-vline 
WA_U_27028_STR-ENDDA sy-vline 
WA_U_27028_STR-BEGDA sy-vline 
WA_U_27028_STR-NUMFZ sy-vline 
WA_U_27028_STR-NUMFA sy-vline 
WA_U_27028_STR-DENTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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