ABAP Select data from SAP table CSMBK_CL2 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP CSMBK_CL2 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 CSMBK_CL2. 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 CSMBK_CL2 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_CSMBK_CL2 TYPE STANDARD TABLE OF CSMBK_CL2,
      WA_CSMBK_CL2 TYPE CSMBK_CL2,
      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: <CSMBK_CL2> TYPE CSMBK_CL2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CSMBK_CL2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CSMBK_CL2
  INTO TABLE IT_CSMBK_CL2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSMBK_CL2
*  INTO TABLE @DATA(IT_CSMBK_CL22).
*--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_CSMBK_CL2 INDEX 1 INTO DATA(WA_CSMBK_CL22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CSMBK_CL2 ASSIGNING <CSMBK_CL2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSMBK_CL2>-RELID = 1.
<CSMBK_CL2>-NAMESPACE = 1.
<CSMBK_CL2>-SCHEME = 1.
<CSMBK_CL2>-CLASS = 1.
<CSMBK_CL2>-ACTIVE = 1.

ENDLOOP.

LOOP AT IT_CSMBK_CL2 INTO WA_CSMBK_CL2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSMBK_CL2-DOMVERS, sy-vline,
  WA_CSMBK_CL2-SUBVERS, sy-vline,
  WA_CSMBK_CL2-SRTF2, sy-vline,
  WA_CSMBK_CL2-STRUKVERSN, sy-vline,
  WA_CSMBK_CL2-SPERR, sy-vline,
  WA_CSMBK_CL2-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSMBK_CL2 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_CSMBK_CL2 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_CSMBK_CL2 INTO WA_CSMBK_CL2.


*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_CSMBK_CL2_STR, 
RELID TYPE STRING,
NAMESPACE TYPE STRING,
SCHEME TYPE STRING,
CLASS TYPE STRING,
ACTIVE TYPE STRING,
DOMVERS TYPE STRING,
SUBVERS TYPE STRING,
SRTF2 TYPE STRING,
STRUKVERSN TYPE STRING,
SPERR TYPE STRING,
AEDAT TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
CLUSTR TYPE STRING,
CLUSTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSMBK_CL2_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_CSMBK_CL2_STR-RELID sy-vline 
WA_CSMBK_CL2_STR-NAMESPACE sy-vline 
WA_CSMBK_CL2_STR-SCHEME sy-vline 
WA_CSMBK_CL2_STR-CLASS sy-vline 
WA_CSMBK_CL2_STR-ACTIVE sy-vline 
WA_CSMBK_CL2_STR-DOMVERS sy-vline 
WA_CSMBK_CL2_STR-SUBVERS sy-vline 
WA_CSMBK_CL2_STR-SRTF2 sy-vline 
WA_CSMBK_CL2_STR-STRUKVERSN sy-vline 
WA_CSMBK_CL2_STR-SPERR sy-vline 
WA_CSMBK_CL2_STR-AEDAT sy-vline 
WA_CSMBK_CL2_STR-BEGDT sy-vline 
WA_CSMBK_CL2_STR-ENDDT sy-vline 
WA_CSMBK_CL2_STR-CLUSTR sy-vline 
WA_CSMBK_CL2_STR-CLUSTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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