ABAP Select data from SAP table ROIISLVCAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIISLVCAL
*  INTO TABLE @DATA(IT_ROIISLVCAL2).
*--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_ROIISLVCAL INDEX 1 INTO DATA(WA_ROIISLVCAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIISLVCAL>-TEXTLINE1 = 1.
<ROIISLVCAL>-TEXTLINE2 = 1.
<ROIISLVCAL>-TEXTLINE3 = 1.
<ROIISLVCAL>-LINCON = 1.
<ROIISLVCAL>-LINDP0 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIISLVCAL-LINDP1, sy-vline,
  WA_ROIISLVCAL-LINDP2, sy-vline,
  WA_ROIISLVCAL-LINDP3, sy-vline,
  WA_ROIISLVCAL-LINLO, sy-vline,
  WA_ROIISLVCAL-LINHI, sy-vline,
  WA_ROIISLVCAL-VOLLO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIISLVCAL 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_ROIISLVCAL 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_ROIISLVCAL INTO WA_ROIISLVCAL.


*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_ROIISLVCAL_STR, 
TEXTLINE1 TYPE STRING,
TEXTLINE2 TYPE STRING,
TEXTLINE3 TYPE STRING,
LINCON TYPE STRING,
LINDP0 TYPE STRING,
LINDP1 TYPE STRING,
LINDP2 TYPE STRING,
LINDP3 TYPE STRING,
LINLO TYPE STRING,
LINHI TYPE STRING,
VOLLO TYPE STRING,
VOLHI TYPE STRING,
SPECVOLHI TYPE STRING,
VOLOUT TYPE STRING,
WLINLO TYPE STRING,
WLINHI TYPE STRING,
WVOLLO TYPE STRING,
WVOLHI TYPE STRING,
WSPECVOLHI TYPE STRING,
WVOLOUT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIISLVCAL_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_ROIISLVCAL_STR-TEXTLINE1 sy-vline 
WA_ROIISLVCAL_STR-TEXTLINE2 sy-vline 
WA_ROIISLVCAL_STR-TEXTLINE3 sy-vline 
WA_ROIISLVCAL_STR-LINCON sy-vline 
WA_ROIISLVCAL_STR-LINDP0 sy-vline 
WA_ROIISLVCAL_STR-LINDP1 sy-vline 
WA_ROIISLVCAL_STR-LINDP2 sy-vline 
WA_ROIISLVCAL_STR-LINDP3 sy-vline 
WA_ROIISLVCAL_STR-LINLO sy-vline 
WA_ROIISLVCAL_STR-LINHI sy-vline 
WA_ROIISLVCAL_STR-VOLLO sy-vline 
WA_ROIISLVCAL_STR-VOLHI sy-vline 
WA_ROIISLVCAL_STR-SPECVOLHI sy-vline 
WA_ROIISLVCAL_STR-VOLOUT sy-vline 
WA_ROIISLVCAL_STR-WLINLO sy-vline 
WA_ROIISLVCAL_STR-WLINHI sy-vline 
WA_ROIISLVCAL_STR-WVOLLO sy-vline 
WA_ROIISLVCAL_STR-WVOLHI sy-vline 
WA_ROIISLVCAL_STR-WSPECVOLHI sy-vline 
WA_ROIISLVCAL_STR-WVOLOUT sy-vline      INTO ld_text SEPARATED BY SPACE.

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