ABAP Select data from SAP table ROIU_OIISLVCKO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIU_OIISLVCKO
*  INTO TABLE @DATA(IT_ROIU_OIISLVCKO2).
*--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_ROIU_OIISLVCKO INDEX 1 INTO DATA(WA_ROIU_OIISLVCKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIU_OIISLVCKO>-MAXDP = 1.
<ROIU_OIISLVCKO>-MINDP = 1.
<ROIU_OIISLVCKO>-UNPKZ = 1.
<ROIU_OIISLVCKO>-UNPPC = 1.
<ROIU_OIISLVCKO>-FLMAS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIU_OIISLVCKO-EXPCOEFF, sy-vline,
  WA_ROIU_OIISLVCKO-CALFILHGT, sy-vline,
  WA_ROIU_OIISLVCKO-DIPDATDIF, sy-vline,
  WA_ROIU_OIISLVCKO-CALTEMP, sy-vline,
  WA_ROIU_OIISLVCKO-CALDENS, sy-vline,
  WA_ROIU_OIISLVCKO-CALNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIU_OIISLVCKO 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_ROIU_OIISLVCKO 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_ROIU_OIISLVCKO INTO WA_ROIU_OIISLVCKO.


*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_ROIU_OIISLVCKO_STR, 
MAXDP TYPE STRING,
MINDP TYPE STRING,
UNPKZ TYPE STRING,
UNPPC TYPE STRING,
FLMAS TYPE STRING,
EXPCOEFF TYPE STRING,
CALFILHGT TYPE STRING,
DIPDATDIF TYPE STRING,
CALTEMP TYPE STRING,
CALDENS TYPE STRING,
CALNAME TYPE STRING,
CALDATE TYPE STRING,
MIN_FLTROOF TYPE STRING,
KAPAZ TYPE STRING,
INCH_INCREMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIU_OIISLVCKO_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_ROIU_OIISLVCKO_STR-MAXDP sy-vline 
WA_ROIU_OIISLVCKO_STR-MINDP sy-vline 
WA_ROIU_OIISLVCKO_STR-UNPKZ sy-vline 
WA_ROIU_OIISLVCKO_STR-UNPPC sy-vline 
WA_ROIU_OIISLVCKO_STR-FLMAS sy-vline 
WA_ROIU_OIISLVCKO_STR-EXPCOEFF sy-vline 
WA_ROIU_OIISLVCKO_STR-CALFILHGT sy-vline 
WA_ROIU_OIISLVCKO_STR-DIPDATDIF sy-vline 
WA_ROIU_OIISLVCKO_STR-CALTEMP sy-vline 
WA_ROIU_OIISLVCKO_STR-CALDENS sy-vline 
WA_ROIU_OIISLVCKO_STR-CALNAME sy-vline 
WA_ROIU_OIISLVCKO_STR-CALDATE sy-vline 
WA_ROIU_OIISLVCKO_STR-MIN_FLTROOF sy-vline 
WA_ROIU_OIISLVCKO_STR-KAPAZ sy-vline 
WA_ROIU_OIISLVCKO_STR-INCH_INCREMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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