ABAP Select data from SAP table ROIKWVIH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIKWVIH
*  INTO TABLE @DATA(IT_ROIKWVIH2).
*--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_ROIKWVIH INDEX 1 INTO DATA(WA_ROIKWVIH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIKWVIH>-LGORT = 1.
<ROIKWVIH>-IBLNR = 1.
<ROIKWVIH>-GJAHR = 1.
<ROIKWVIH>-SOBKZ = 1.
<ROIKWVIH>-GIDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIKWVIH-XBLNI, sy-vline,
  WA_ROIKWVIH-DNAME, sy-vline,
  WA_ROIKWVIH-DDATE, sy-vline,
  WA_ROIKWVIH-DTIME, sy-vline,
  WA_ROIKWVIH-LGOBE, sy-vline,
  WA_ROIKWVIH-SOTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIKWVIH 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_ROIKWVIH 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_ROIKWVIH INTO WA_ROIKWVIH.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ROIKWVIH-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIKWVIH-GJAHR.
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_ROIKWVIH_STR, 
LGORT TYPE STRING,
IBLNR TYPE STRING,
GJAHR TYPE STRING,
SOBKZ TYPE STRING,
GIDAT TYPE STRING,
XBLNI TYPE STRING,
DNAME TYPE STRING,
DDATE TYPE STRING,
DTIME TYPE STRING,
LGOBE TYPE STRING,
SOTXT TYPE STRING,
FILIALE TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
VPDAT TYPE STRING,
KEORD TYPE STRING,
ORDNG TYPE STRING,
INVNU TYPE STRING,
SEGNUM TYPE STRING,
PSGNUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIKWVIH_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_ROIKWVIH_STR-LGORT sy-vline 
WA_ROIKWVIH_STR-IBLNR sy-vline 
WA_ROIKWVIH_STR-GJAHR sy-vline 
WA_ROIKWVIH_STR-SOBKZ sy-vline 
WA_ROIKWVIH_STR-GIDAT sy-vline 
WA_ROIKWVIH_STR-XBLNI sy-vline 
WA_ROIKWVIH_STR-DNAME sy-vline 
WA_ROIKWVIH_STR-DDATE sy-vline 
WA_ROIKWVIH_STR-DTIME sy-vline 
WA_ROIKWVIH_STR-LGOBE sy-vline 
WA_ROIKWVIH_STR-SOTXT sy-vline 
WA_ROIKWVIH_STR-FILIALE sy-vline 
WA_ROIKWVIH_STR-NAME1 sy-vline 
WA_ROIKWVIH_STR-NAME2 sy-vline 
WA_ROIKWVIH_STR-VPDAT sy-vline 
WA_ROIKWVIH_STR-KEORD sy-vline 
WA_ROIKWVIH_STR-ORDNG sy-vline 
WA_ROIKWVIH_STR-INVNU sy-vline 
WA_ROIKWVIH_STR-SEGNUM sy-vline 
WA_ROIKWVIH_STR-PSGNUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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