ABAP Select data from SAP table U_27952 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_27952 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_27952. 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_27952 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_27952 TYPE STANDARD TABLE OF U_27952,
      WA_U_27952 TYPE U_27952,
      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_27952> TYPE U_27952.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_27952.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_27952
  INTO TABLE IT_U_27952.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_27952
*  INTO TABLE @DATA(IT_U_279522).
*--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_27952 INDEX 1 INTO DATA(WA_U_279522).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_27952 ASSIGNING <U_27952>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_27952>-SPRSL = 1.
<U_27952>-PROCL = 1.
<U_27952>-OPNAM = 1.
<U_27952>-OPFLD = 1.
<U_27952>-OSIGN = 1.

ENDLOOP.

LOOP AT IT_U_27952 INTO WA_U_27952.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_27952-CNTRY, sy-vline,
  WA_U_27952-OPTXT, sy-vline,
  WA_U_27952-TYPEV, sy-vline,
  WA_U_27952-LENGV, sy-vline,
  WA_U_27952-REACT, sy-vline,
  WA_U_27952-TYPEK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_27952 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_27952 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_27952 INTO WA_U_27952.


*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 ISOLA, internal->external for field SPRSL
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_U_27952-SPRSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_27952-SPRSL.
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_27952_STR, 
SPRSL TYPE STRING,
PROCL TYPE STRING,
OPNAM TYPE STRING,
OPFLD TYPE STRING,
OSIGN TYPE STRING,
CNTRY TYPE STRING,
OPTXT TYPE STRING,
TYPEV TYPE STRING,
LENGV TYPE STRING,
REACT TYPE STRING,
TYPEK TYPE STRING,
LENGK TYPE STRING,
NUMOF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_27952_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_27952_STR-SPRSL sy-vline 
WA_U_27952_STR-PROCL sy-vline 
WA_U_27952_STR-OPNAM sy-vline 
WA_U_27952_STR-OPFLD sy-vline 
WA_U_27952_STR-OSIGN sy-vline 
WA_U_27952_STR-CNTRY sy-vline 
WA_U_27952_STR-OPTXT sy-vline 
WA_U_27952_STR-TYPEV sy-vline 
WA_U_27952_STR-LENGV sy-vline 
WA_U_27952_STR-REACT sy-vline 
WA_U_27952_STR-TYPEK sy-vline 
WA_U_27952_STR-LENGK sy-vline 
WA_U_27952_STR-NUMOF sy-vline      INTO ld_text SEPARATED BY SPACE.

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