ABAP Select data from SAP table ROIISLVCK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIISLVCK
*  INTO TABLE @DATA(IT_ROIISLVCK2).
*--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_ROIISLVCK INDEX 1 INTO DATA(WA_ROIISLVCK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIISLVCK>-MANDT = 1.
<ROIISLVCK>-SLVNR = 1.
<ROIISLVCK>-NRDEC = 1.
<ROIISLVCK>-SLVGR = 1.
<ROIISLVCK>-VOLUN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIISLVCK-LENUN, sy-vline,
  WA_ROIISLVCK-ERDAT, sy-vline,
  WA_ROIISLVCK-ERZEIT, sy-vline,
  WA_ROIISLVCK-ERNAM, sy-vline,
  WA_ROIISLVCK-AEDAT, sy-vline,
  WA_ROIISLVCK-AEZEIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIISLVCK 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_ROIISLVCK 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_ROIISLVCK INTO WA_ROIISLVCK.


*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 CUNIT, internal->external for field VOLUN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIISLVCK-VOLUN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIISLVCK-VOLUN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LENUN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIISLVCK-LENUN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIISLVCK-LENUN.
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_ROIISLVCK_STR, 
MANDT TYPE STRING,
SLVNR TYPE STRING,
NRDEC TYPE STRING,
SLVGR TYPE STRING,
VOLUN TYPE STRING,
LENUN TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
AENAM TYPE STRING,
BLOIND TYPE STRING,
DELIND TYPE STRING,
UPD_FLAG TYPE STRING,
MSEHTL TYPE STRING,
MSEHTV TYPE STRING,
SLVICL TYPE STRING,
SLVICV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIISLVCK_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_ROIISLVCK_STR-MANDT sy-vline 
WA_ROIISLVCK_STR-SLVNR sy-vline 
WA_ROIISLVCK_STR-NRDEC sy-vline 
WA_ROIISLVCK_STR-SLVGR sy-vline 
WA_ROIISLVCK_STR-VOLUN sy-vline 
WA_ROIISLVCK_STR-LENUN sy-vline 
WA_ROIISLVCK_STR-ERDAT sy-vline 
WA_ROIISLVCK_STR-ERZEIT sy-vline 
WA_ROIISLVCK_STR-ERNAM sy-vline 
WA_ROIISLVCK_STR-AEDAT sy-vline 
WA_ROIISLVCK_STR-AEZEIT sy-vline 
WA_ROIISLVCK_STR-AENAM sy-vline 
WA_ROIISLVCK_STR-BLOIND sy-vline 
WA_ROIISLVCK_STR-DELIND sy-vline 
WA_ROIISLVCK_STR-UPD_FLAG sy-vline 
WA_ROIISLVCK_STR-MSEHTL sy-vline 
WA_ROIISLVCK_STR-MSEHTV sy-vline 
WA_ROIISLVCK_STR-SLVICL sy-vline 
WA_ROIISLVCK_STR-SLVICV sy-vline      INTO ld_text SEPARATED BY SPACE.

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