ABAP Select data from SAP table VSRSDB_CN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VSRSDB_CN
*  INTO TABLE @DATA(IT_VSRSDB_CN2).
*--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_VSRSDB_CN INDEX 1 INTO DATA(WA_VSRSDB_CN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VSRSDB_CN>-MANDT = 1.
<VSRSDB_CN>-VSNMR = 1.
<VSRSDB_CN>-RSNUM = 1.
<VSRSDB_CN>-RSPOS = 1.
<VSRSDB_CN>-RSART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VSRSDB_CN-RSINZ, sy-vline,
  WA_VSRSDB_CN-PLNUM, sy-vline,
  WA_VSRSDB_CN-BANFN, sy-vline,
  WA_VSRSDB_CN-BNFPO, sy-vline,
  WA_VSRSDB_CN-EBELN, sy-vline,
  WA_VSRSDB_CN-EBELP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VSRSDB_CN 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_VSRSDB_CN 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_VSRSDB_CN INTO WA_VSRSDB_CN.


*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 PLNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VSRSDB_CN-PLNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VSRSDB_CN-PLNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BANFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VSRSDB_CN-BANFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VSRSDB_CN-BANFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VSRSDB_CN-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VSRSDB_CN-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VSRSDB_CN-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VSRSDB_CN-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AOBAR, internal->external for field AOBAR
CALL FUNCTION 'CONVERSION_EXIT_AOBAR_OUTPUT'
  EXPORTING
    input =                      WA_VSRSDB_CN-AOBAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VSRSDB_CN-AOBAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ZEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VSRSDB_CN-ZEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VSRSDB_CN-ZEINH.
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_VSRSDB_CN_STR, 
MANDT TYPE STRING,
VSNMR TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
RSINZ TYPE STRING,
PLNUM TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
AUFNR TYPE STRING,
AUFPO TYPE STRING,
AOBAR TYPE STRING,
ZEINH TYPE STRING,
DAUER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VSRSDB_CN_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_VSRSDB_CN_STR-MANDT sy-vline 
WA_VSRSDB_CN_STR-VSNMR sy-vline 
WA_VSRSDB_CN_STR-RSNUM sy-vline 
WA_VSRSDB_CN_STR-RSPOS sy-vline 
WA_VSRSDB_CN_STR-RSART sy-vline 
WA_VSRSDB_CN_STR-RSINZ sy-vline 
WA_VSRSDB_CN_STR-PLNUM sy-vline 
WA_VSRSDB_CN_STR-BANFN sy-vline 
WA_VSRSDB_CN_STR-BNFPO sy-vline 
WA_VSRSDB_CN_STR-EBELN sy-vline 
WA_VSRSDB_CN_STR-EBELP sy-vline 
WA_VSRSDB_CN_STR-AUFNR sy-vline 
WA_VSRSDB_CN_STR-AUFPO sy-vline 
WA_VSRSDB_CN_STR-AOBAR sy-vline 
WA_VSRSDB_CN_STR-ZEINH sy-vline 
WA_VSRSDB_CN_STR-DAUER sy-vline      INTO ld_text SEPARATED BY SPACE.

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