ABAP Select data from SAP table CNV_10940_VARDET into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNV_10940_VARDET 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 CNV_10940_VARDET. 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 CNV_10940_VARDET 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_CNV_10940_VARDET TYPE STANDARD TABLE OF CNV_10940_VARDET,
      WA_CNV_10940_VARDET TYPE CNV_10940_VARDET,
      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: <CNV_10940_VARDET> TYPE CNV_10940_VARDET.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNV_10940_VARDET.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNV_10940_VARDET
  INTO TABLE IT_CNV_10940_VARDET.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_10940_VARDET
*  INTO TABLE @DATA(IT_CNV_10940_VARDET2).
*--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_CNV_10940_VARDET INDEX 1 INTO DATA(WA_CNV_10940_VARDET2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNV_10940_VARDET ASSIGNING <CNV_10940_VARDET>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_10940_VARDET>-MANDT = 1.
<CNV_10940_VARDET>-RUNID = 1.
<CNV_10940_VARDET>-PCLPACKID = 1.
<CNV_10940_VARDET>-REPORT = 1.
<CNV_10940_VARDET>-VARNAME = 1.

ENDLOOP.

LOOP AT IT_CNV_10940_VARDET INTO WA_CNV_10940_VARDET.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_10940_VARDET-SELNAME, sy-vline,
  WA_CNV_10940_VARDET-OLD_NEW, sy-vline,
  WA_CNV_10940_VARDET-COUNTER, sy-vline,
  WA_CNV_10940_VARDET-STRING, sy-vline,
  WA_CNV_10940_VARDET-STATUS, sy-vline,
  WA_CNV_10940_VARDET-SEQNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_10940_VARDET 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_CNV_10940_VARDET 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_CNV_10940_VARDET INTO WA_CNV_10940_VARDET.


*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_CNV_10940_VARDET_STR, 
MANDT TYPE STRING,
RUNID TYPE STRING,
PCLPACKID TYPE STRING,
REPORT TYPE STRING,
VARNAME TYPE STRING,
SELNAME TYPE STRING,
OLD_NEW TYPE STRING,
COUNTER TYPE STRING,
STRING TYPE STRING,
STATUS TYPE STRING,
SEQNUM TYPE STRING,
EXCLUDE TYPE STRING,
SEVERITY TYPE STRING,
KIND TYPE STRING,
SIGN TYPE STRING,
OPT TYPE STRING,
LOW_OLD TYPE STRING,
HIGH_OLD TYPE STRING,
LOW_NEW TYPE STRING,
HIGH_NEW TYPE STRING,
HAS_CHANGED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_10940_VARDET_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_CNV_10940_VARDET_STR-MANDT sy-vline 
WA_CNV_10940_VARDET_STR-RUNID sy-vline 
WA_CNV_10940_VARDET_STR-PCLPACKID sy-vline 
WA_CNV_10940_VARDET_STR-REPORT sy-vline 
WA_CNV_10940_VARDET_STR-VARNAME sy-vline 
WA_CNV_10940_VARDET_STR-SELNAME sy-vline 
WA_CNV_10940_VARDET_STR-OLD_NEW sy-vline 
WA_CNV_10940_VARDET_STR-COUNTER sy-vline 
WA_CNV_10940_VARDET_STR-STRING sy-vline 
WA_CNV_10940_VARDET_STR-STATUS sy-vline 
WA_CNV_10940_VARDET_STR-SEQNUM sy-vline 
WA_CNV_10940_VARDET_STR-EXCLUDE sy-vline 
WA_CNV_10940_VARDET_STR-SEVERITY sy-vline 
WA_CNV_10940_VARDET_STR-KIND sy-vline 
WA_CNV_10940_VARDET_STR-SIGN sy-vline 
WA_CNV_10940_VARDET_STR-OPT sy-vline 
WA_CNV_10940_VARDET_STR-LOW_OLD sy-vline 
WA_CNV_10940_VARDET_STR-HIGH_OLD sy-vline 
WA_CNV_10940_VARDET_STR-LOW_NEW sy-vline 
WA_CNV_10940_VARDET_STR-HIGH_NEW sy-vline 
WA_CNV_10940_VARDET_STR-HAS_CHANGED sy-vline      INTO ld_text SEPARATED BY SPACE.

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