ABAP Select data from SAP table RECNVIKOKO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECNVIKOKO
*  INTO TABLE @DATA(IT_RECNVIKOKO2).
*--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_RECNVIKOKO INDEX 1 INTO DATA(WA_RECNVIKOKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECNVIKOKO>-MANDT = 1.
<RECNVIKOKO>-BUKRS = 1.
<RECNVIKOKO>-SANLF = 1.
<RECNVIKOKO>-RKEY1 = 1.
<RECNVIKOKO>-RKEY2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECNVIKOKO-RKEY3, sy-vline,
  WA_RECNVIKOKO-DGUEL_KK, sy-vline,
  WA_RECNVIKOKO-NLFD_ANG, sy-vline,
  WA_RECNVIKOKO-SSTATI, sy-vline,
  WA_RECNVIKOKO-SINKASSO, sy-vline,
  WA_RECNVIKOKO-SWHRKOND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECNVIKOKO 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_RECNVIKOKO 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_RECNVIKOKO INTO WA_RECNVIKOKO.


*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_RECNVIKOKO_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
SANLF TYPE STRING,
RKEY1 TYPE STRING,
RKEY2 TYPE STRING,
RKEY3 TYPE STRING,
DGUEL_KK TYPE STRING,
NLFD_ANG TYPE STRING,
SSTATI TYPE STRING,
SINKASSO TYPE STRING,
SWHRKOND TYPE STRING,
AMMRHY TYPE STRING,
JPROR TYPE STRING,
SFART TYPE STRING,
SZAWS TYPE STRING,
MWSKZ TYPE STRING,
DMIEND TYPE STRING,
JLASTOP TYPE STRING,
DLSTSP TYPE STRING,
ZLSCH TYPE STRING,
SVSTSOND TYPE STRING,
JBMONAT TYPE STRING,
JVSTOPT TYPE STRING,
GZLSCH TYPE STRING,
SZEITANT TYPE STRING,
SZBMETH TYPE STRING,
TXJCD TYPE STRING,
SFKALRI TYPE STRING,
ATTRHY TYPE STRING,
OLD_ATTRHY TYPE STRING,
OLD_AMMRHY TYPE STRING,
TXJCDTEXT TYPE STRING,
MWSKZTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECNVIKOKO_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_RECNVIKOKO_STR-MANDT sy-vline 
WA_RECNVIKOKO_STR-BUKRS sy-vline 
WA_RECNVIKOKO_STR-SANLF sy-vline 
WA_RECNVIKOKO_STR-RKEY1 sy-vline 
WA_RECNVIKOKO_STR-RKEY2 sy-vline 
WA_RECNVIKOKO_STR-RKEY3 sy-vline 
WA_RECNVIKOKO_STR-DGUEL_KK sy-vline 
WA_RECNVIKOKO_STR-NLFD_ANG sy-vline 
WA_RECNVIKOKO_STR-SSTATI sy-vline 
WA_RECNVIKOKO_STR-SINKASSO sy-vline 
WA_RECNVIKOKO_STR-SWHRKOND sy-vline 
WA_RECNVIKOKO_STR-AMMRHY sy-vline 
WA_RECNVIKOKO_STR-JPROR sy-vline 
WA_RECNVIKOKO_STR-SFART sy-vline 
WA_RECNVIKOKO_STR-SZAWS sy-vline 
WA_RECNVIKOKO_STR-MWSKZ sy-vline 
WA_RECNVIKOKO_STR-DMIEND sy-vline 
WA_RECNVIKOKO_STR-JLASTOP sy-vline 
WA_RECNVIKOKO_STR-DLSTSP sy-vline 
WA_RECNVIKOKO_STR-ZLSCH sy-vline 
WA_RECNVIKOKO_STR-SVSTSOND sy-vline 
WA_RECNVIKOKO_STR-JBMONAT sy-vline 
WA_RECNVIKOKO_STR-JVSTOPT sy-vline 
WA_RECNVIKOKO_STR-GZLSCH sy-vline 
WA_RECNVIKOKO_STR-SZEITANT sy-vline 
WA_RECNVIKOKO_STR-SZBMETH sy-vline 
WA_RECNVIKOKO_STR-TXJCD sy-vline 
WA_RECNVIKOKO_STR-SFKALRI sy-vline 
WA_RECNVIKOKO_STR-ATTRHY sy-vline 
WA_RECNVIKOKO_STR-OLD_ATTRHY sy-vline 
WA_RECNVIKOKO_STR-OLD_AMMRHY sy-vline 
WA_RECNVIKOKO_STR-TXJCDTEXT sy-vline 
WA_RECNVIKOKO_STR-MWSKZTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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