ABAP Select data from SAP table CNVTABLESC 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 CNVTABLESC 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 CNVTABLESC. 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 CNVTABLESC 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_CNVTABLESC TYPE STANDARD TABLE OF CNVTABLESC,
      WA_CNVTABLESC TYPE CNVTABLESC,
      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: <CNVTABLESC> TYPE CNVTABLESC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVTABLESC
*  INTO TABLE @DATA(IT_CNVTABLESC2).
*--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_CNVTABLESC INDEX 1 INTO DATA(WA_CNVTABLESC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVTABLESC>-MANDT = 1.
<CNVTABLESC>-PACKID = 1.
<CNVTABLESC>-PACKOLD = 1.
<CNVTABLESC>-TABNAME = 1.
<CNVTABLESC>-SUMUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVTABLESC-COPYROWS, sy-vline,
  WA_CNVTABLESC-KEYCHVIEWS, sy-vline,
  WA_CNVTABLESC-NOVIEW, sy-vline,
  WA_CNVTABLESC-SEQNUM, sy-vline,
  WA_CNVTABLESC-MASTERTAB, sy-vline,
  WA_CNVTABLESC-NOTUSE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVTABLESC 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_CNVTABLESC 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_CNVTABLESC INTO WA_CNVTABLESC.


*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_CNVTABLESC_STR, 
MANDT TYPE STRING,
PACKID TYPE STRING,
PACKOLD TYPE STRING,
TABNAME TYPE STRING,
SUMUP TYPE STRING,
COPYROWS TYPE STRING,
KEYCHVIEWS TYPE STRING,
NOVIEW TYPE STRING,
SEQNUM TYPE STRING,
MASTERTAB TYPE STRING,
NOTUSE TYPE STRING,
USECLTECH TYPE STRING,
USEDROPINS TYPE STRING,
GETDUPREC TYPE STRING,
STATUS TYPE STRING,
GETENTRY TYPE STRING,
MULTICOPY TYPE STRING,
NODATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVTABLESC_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_CNVTABLESC_STR-MANDT sy-vline 
WA_CNVTABLESC_STR-PACKID sy-vline 
WA_CNVTABLESC_STR-PACKOLD sy-vline 
WA_CNVTABLESC_STR-TABNAME sy-vline 
WA_CNVTABLESC_STR-SUMUP sy-vline 
WA_CNVTABLESC_STR-COPYROWS sy-vline 
WA_CNVTABLESC_STR-KEYCHVIEWS sy-vline 
WA_CNVTABLESC_STR-NOVIEW sy-vline 
WA_CNVTABLESC_STR-SEQNUM sy-vline 
WA_CNVTABLESC_STR-MASTERTAB sy-vline 
WA_CNVTABLESC_STR-NOTUSE sy-vline 
WA_CNVTABLESC_STR-USECLTECH sy-vline 
WA_CNVTABLESC_STR-USEDROPINS sy-vline 
WA_CNVTABLESC_STR-GETDUPREC sy-vline 
WA_CNVTABLESC_STR-STATUS sy-vline 
WA_CNVTABLESC_STR-GETENTRY sy-vline 
WA_CNVTABLESC_STR-MULTICOPY sy-vline 
WA_CNVTABLESC_STR-NODATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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