ABAP Select data from SAP table /SAPSLL/CLSNR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPSLL/CLSNR 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 /SAPSLL/CLSNR. 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 /SAPSLL/CLSNR 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_/SAPSLL/CLSNR TYPE STANDARD TABLE OF /SAPSLL/CLSNR,
      WA_/SAPSLL/CLSNR TYPE /SAPSLL/CLSNR,
      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: </SAPSLL/CLSNR> TYPE /SAPSLL/CLSNR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPSLL/CLSNR
  INTO TABLE IT_/SAPSLL/CLSNR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPSLL/CLSNR
*  INTO TABLE @DATA(IT_/SAPSLL/CLSNR2).
*--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_/SAPSLL/CLSNR INDEX 1 INTO DATA(WA_/SAPSLL/CLSNR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPSLL/CLSNR ASSIGNING </SAPSLL/CLSNR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPSLL/CLSNR>-MANDT = 1.
</SAPSLL/CLSNR>-NOSCT = 1.
</SAPSLL/CLSNR>-CCNGN = 1.
</SAPSLL/CLSNR>-DATAB = 1.
</SAPSLL/CLSNR>-DATBI = 1.

ENDLOOP.

LOOP AT IT_/SAPSLL/CLSNR INTO WA_/SAPSLL/CLSNR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPSLL/CLSNR-TCNID, sy-vline,
  WA_/SAPSLL/CLSNR-BEMEH, sy-vline,
  WA_/SAPSLL/CLSNR-BEME2, sy-vline,
  WA_/SAPSLL/CLSNR-CUOM1, sy-vline,
  WA_/SAPSLL/CLSNR-CUOM2, sy-vline,
  WA_/SAPSLL/CLSNR-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPSLL/CLSNR 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_/SAPSLL/CLSNR 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_/SAPSLL/CLSNR INTO WA_/SAPSLL/CLSNR.


*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 CUNIT, internal->external for field BEMEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPSLL/CLSNR-BEMEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPSLL/CLSNR-BEMEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BEME2
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPSLL/CLSNR-BEME2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPSLL/CLSNR-BEME2.
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_/SAPSLL/CLSNR_STR, 
MANDT TYPE STRING,
NOSCT TYPE STRING,
CCNGN TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
TCNID TYPE STRING,
BEMEH TYPE STRING,
BEME2 TYPE STRING,
CUOM1 TYPE STRING,
CUOM2 TYPE STRING,
ERNAM TYPE STRING,
CRTSP TYPE STRING,
AENAM TYPE STRING,
CHTSP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPSLL/CLSNR_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_/SAPSLL/CLSNR_STR-MANDT sy-vline 
WA_/SAPSLL/CLSNR_STR-NOSCT sy-vline 
WA_/SAPSLL/CLSNR_STR-CCNGN sy-vline 
WA_/SAPSLL/CLSNR_STR-DATAB sy-vline 
WA_/SAPSLL/CLSNR_STR-DATBI sy-vline 
WA_/SAPSLL/CLSNR_STR-TCNID sy-vline 
WA_/SAPSLL/CLSNR_STR-BEMEH sy-vline 
WA_/SAPSLL/CLSNR_STR-BEME2 sy-vline 
WA_/SAPSLL/CLSNR_STR-CUOM1 sy-vline 
WA_/SAPSLL/CLSNR_STR-CUOM2 sy-vline 
WA_/SAPSLL/CLSNR_STR-ERNAM sy-vline 
WA_/SAPSLL/CLSNR_STR-CRTSP sy-vline 
WA_/SAPSLL/CLSNR_STR-AENAM sy-vline 
WA_/SAPSLL/CLSNR_STR-CHTSP sy-vline      INTO ld_text SEPARATED BY SPACE.

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