ABAP Select data from SAP table U_27989C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_27989C 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_27989C. 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_27989C 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_27989C TYPE STANDARD TABLE OF U_27989C,
      WA_U_27989C TYPE U_27989C,
      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_27989C> TYPE U_27989C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_27989C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_27989C
  INTO TABLE IT_U_27989C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_27989C
*  INTO TABLE @DATA(IT_U_27989C2).
*--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_27989C INDEX 1 INTO DATA(WA_U_27989C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_27989C ASSIGNING <U_27989C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_27989C>-MANDT = 1.
<U_27989C>-TPARTDOC = 1.
<U_27989C>-ASSESSMENT = 1.
<U_27989C>-ITEM = 1.
<U_27989C>-ASSESSMENTDATE = 1.

ENDLOOP.

LOOP AT IT_U_27989C INTO WA_U_27989C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_27989C-ITEMPOSITION, sy-vline,
  WA_U_27989C-ITEMTYPE, sy-vline,
  WA_U_27989C-SCORE, sy-vline,
  WA_U_27989C-SCOREMAX, sy-vline,
  WA_U_27989C-SCOREPERCENT, sy-vline,
  WA_U_27989C-PASSEDSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_27989C 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_27989C 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_27989C INTO WA_U_27989C.


*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 TPARTDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_27989C-TPARTDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27989C-TPARTDOC.
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_U_27989C_STR, 
MANDT TYPE STRING,
TPARTDOC TYPE STRING,
ASSESSMENT TYPE STRING,
ITEM TYPE STRING,
ASSESSMENTDATE TYPE STRING,
ITEMPOSITION TYPE STRING,
ITEMTYPE TYPE STRING,
SCORE TYPE STRING,
SCOREMAX TYPE STRING,
SCOREPERCENT TYPE STRING,
PASSEDSTATUS TYPE STRING,
ANSID TYPE STRING,
ASSESSMENTDATE1 TYPE STRING,
ANSPOSITION TYPE STRING,
ANSMARKED TYPE STRING,
PASSEDSTATUS1 TYPE STRING,
ASSESSMENTDATE2 TYPE STRING,
ANSGIVEN TYPE STRING,
PASSEDSTATUS2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_27989C_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_27989C_STR-MANDT sy-vline 
WA_U_27989C_STR-TPARTDOC sy-vline 
WA_U_27989C_STR-ASSESSMENT sy-vline 
WA_U_27989C_STR-ITEM sy-vline 
WA_U_27989C_STR-ASSESSMENTDATE sy-vline 
WA_U_27989C_STR-ITEMPOSITION sy-vline 
WA_U_27989C_STR-ITEMTYPE sy-vline 
WA_U_27989C_STR-SCORE sy-vline 
WA_U_27989C_STR-SCOREMAX sy-vline 
WA_U_27989C_STR-SCOREPERCENT sy-vline 
WA_U_27989C_STR-PASSEDSTATUS sy-vline 
WA_U_27989C_STR-ANSID sy-vline 
WA_U_27989C_STR-ASSESSMENTDATE1 sy-vline 
WA_U_27989C_STR-ANSPOSITION sy-vline 
WA_U_27989C_STR-ANSMARKED sy-vline 
WA_U_27989C_STR-PASSEDSTATUS1 sy-vline 
WA_U_27989C_STR-ASSESSMENTDATE2 sy-vline 
WA_U_27989C_STR-ANSGIVEN sy-vline 
WA_U_27989C_STR-PASSEDSTATUS2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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