ABAP Select data from SAP table BSS_CUIL_CLASS_CHAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BSS_CUIL_CLASS_CHAR
*  INTO TABLE @DATA(IT_BSS_CUIL_CLASS_CHAR2).
*--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_BSS_CUIL_CLASS_CHAR INDEX 1 INTO DATA(WA_BSS_CUIL_CLASS_CHAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BSS_CUIL_CLASS_CHAR>-CHARID = 1.
<BSS_CUIL_CLASS_CHAR>-CLASSTYPE = 1.
<BSS_CUIL_CLASS_CHAR>-ECOCNTR = 1.
<BSS_CUIL_CLASS_CHAR>-VALCNT = 1.
<BSS_CUIL_CLASS_CHAR>-ATAUT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BSS_CUIL_CLASS_CHAR-ATAW1, sy-vline,
  WA_BSS_CUIL_CLASS_CHAR-ATAWE, sy-vline,
  WA_BSS_CUIL_CLASS_CHAR-ATCOD, sy-vline,
  WA_BSS_CUIL_CLASS_CHAR-ATFLB, sy-vline,
  WA_BSS_CUIL_CLASS_CHAR-ATFLV, sy-vline,
  WA_BSS_CUIL_CLASS_CHAR-ATIMB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BSS_CUIL_CLASS_CHAR 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_BSS_CUIL_CLASS_CHAR 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_BSS_CUIL_CLASS_CHAR INTO WA_BSS_CUIL_CLASS_CHAR.


*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 ATINN, internal->external for field CHARID
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_BSS_CUIL_CLASS_CHAR-CHARID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSS_CUIL_CLASS_CHAR-CHARID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BSS_CUIL_CLASS_CHAR-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSS_CUIL_CLASS_CHAR-ATAW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAWE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BSS_CUIL_CLASS_CHAR-ATAWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSS_CUIL_CLASS_CHAR-ATAWE.
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_BSS_CUIL_CLASS_CHAR_STR, 
CHARID TYPE STRING,
CLASSTYPE TYPE STRING,
ECOCNTR TYPE STRING,
VALCNT TYPE STRING,
ATAUT TYPE STRING,
ATAW1 TYPE STRING,
ATAWE TYPE STRING,
ATCOD TYPE STRING,
ATFLB TYPE STRING,
ATFLV TYPE STRING,
ATIMB TYPE STRING,
ATSRT TYPE STRING,
ATWRT TYPE STRING,
ATZIS TYPE STRING,
VADEL TYPE STRING,
VADVF TYPE STRING,
VGLAR TYPE STRING,
ATNAM TYPE STRING,
UI_ONLY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BSS_CUIL_CLASS_CHAR_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_BSS_CUIL_CLASS_CHAR_STR-CHARID sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-CLASSTYPE sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ECOCNTR sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-VALCNT sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATAUT sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATAW1 sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATAWE sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATCOD sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATFLB sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATFLV sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATIMB sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATSRT sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATWRT sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATZIS sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-VADEL sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-VADVF sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-VGLAR sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-ATNAM sy-vline 
WA_BSS_CUIL_CLASS_CHAR_STR-UI_ONLY sy-vline      INTO ld_text SEPARATED BY SPACE.

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