ABAP Select data from SAP table ROIISLVCH_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIISLVCH_D
*  INTO TABLE @DATA(IT_ROIISLVCH_D2).
*--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_ROIISLVCH_D INDEX 1 INTO DATA(WA_ROIISLVCH_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIISLVCH_D>-MANDT = 1.
<ROIISLVCH_D>-SLVNR = 1.
<ROIISLVCH_D>-SLVIND = 1.
<ROIISLVCH_D>-VALID = 1.
<ROIISLVCH_D>-VALFROM = 1.

ENDLOOP.

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

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


*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 ALPHA, internal->external for field MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIISLVCH_D-MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIISLVCH_D-MP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SEQNR, internal->external for field SEQNR
CALL FUNCTION 'CONVERSION_EXIT_SEQNR_OUTPUT'
  EXPORTING
    input =                      WA_ROIISLVCH_D-SEQNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIISLVCH_D-SEQNR.
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_ROIISLVCH_D_STR, 
MANDT TYPE STRING,
SLVNR TYPE STRING,
SLVIND TYPE STRING,
VALID TYPE STRING,
VALFROM TYPE STRING,
VALTO 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,
FDATE TYPE STRING,
FTIME TYPE STRING,
TDATE TYPE STRING,
TTIME TYPE STRING,
MP_NO TYPE STRING,
SOCNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
SEQNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIISLVCH_D_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_ROIISLVCH_D_STR-MANDT sy-vline 
WA_ROIISLVCH_D_STR-SLVNR sy-vline 
WA_ROIISLVCH_D_STR-SLVIND sy-vline 
WA_ROIISLVCH_D_STR-VALID sy-vline 
WA_ROIISLVCH_D_STR-VALFROM sy-vline 
WA_ROIISLVCH_D_STR-VALTO sy-vline 
WA_ROIISLVCH_D_STR-ERDAT sy-vline 
WA_ROIISLVCH_D_STR-ERZEIT sy-vline 
WA_ROIISLVCH_D_STR-ERNAM sy-vline 
WA_ROIISLVCH_D_STR-AEDAT sy-vline 
WA_ROIISLVCH_D_STR-AEZEIT sy-vline 
WA_ROIISLVCH_D_STR-AENAM sy-vline 
WA_ROIISLVCH_D_STR-BLOIND sy-vline 
WA_ROIISLVCH_D_STR-DELIND sy-vline 
WA_ROIISLVCH_D_STR-FDATE sy-vline 
WA_ROIISLVCH_D_STR-FTIME sy-vline 
WA_ROIISLVCH_D_STR-TDATE sy-vline 
WA_ROIISLVCH_D_STR-TTIME sy-vline 
WA_ROIISLVCH_D_STR-MP_NO sy-vline 
WA_ROIISLVCH_D_STR-SOCNR sy-vline 
WA_ROIISLVCH_D_STR-WERKS sy-vline 
WA_ROIISLVCH_D_STR-LGORT sy-vline 
WA_ROIISLVCH_D_STR-SEQNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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