ABAP Select data from SAP table ROIAMMAT_ALV2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIAMMAT_ALV2 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 ROIAMMAT_ALV2. 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 ROIAMMAT_ALV2 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_ROIAMMAT_ALV2 TYPE STANDARD TABLE OF ROIAMMAT_ALV2,
      WA_ROIAMMAT_ALV2 TYPE ROIAMMAT_ALV2,
      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: <ROIAMMAT_ALV2> TYPE ROIAMMAT_ALV2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ROIAMMAT_ALV2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ROIAMMAT_ALV2
  INTO TABLE IT_ROIAMMAT_ALV2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIAMMAT_ALV2
*  INTO TABLE @DATA(IT_ROIAMMAT_ALV22).
*--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_ROIAMMAT_ALV2 INDEX 1 INTO DATA(WA_ROIAMMAT_ALV22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ROIAMMAT_ALV2 ASSIGNING <ROIAMMAT_ALV2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIAMMAT_ALV2>-LGORT = 1.
<ROIAMMAT_ALV2>-BWART = 1.
<ROIAMMAT_ALV2>-SOBKZ = 1.
<ROIAMMAT_ALV2>-MBLNR = 1.
<ROIAMMAT_ALV2>-ZEILE = 1.

ENDLOOP.

LOOP AT IT_ROIAMMAT_ALV2 INTO WA_ROIAMMAT_ALV2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIAMMAT_ALV2-BUDAT, sy-vline,
  WA_ROIAMMAT_ALV2-MENGE, sy-vline,
  WA_ROIAMMAT_ALV2-ABGANG, sy-vline,
  WA_ROIAMMAT_ALV2-LEER, sy-vline,
  WA_ROIAMMAT_ALV2-MEINS, sy-vline,
  WA_ROIAMMAT_ALV2-KONTZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIAMMAT_ALV2 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_ROIAMMAT_ALV2 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_ROIAMMAT_ALV2 INTO WA_ROIAMMAT_ALV2.


*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 MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIAMMAT_ALV2-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIAMMAT_ALV2-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIAMMAT_ALV2-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIAMMAT_ALV2-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIEXGNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIAMMAT_ALV2-OIEXGNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIAMMAT_ALV2-OIEXGNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ROIAMMAT_ALV2-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIAMMAT_ALV2-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIAMMAT_ALV2-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIAMMAT_ALV2-MATNR.
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_ROIAMMAT_ALV2_STR, 
LGORT TYPE STRING,
BWART TYPE STRING,
SOBKZ TYPE STRING,
MBLNR TYPE STRING,
ZEILE TYPE STRING,
BUDAT TYPE STRING,
MENGE TYPE STRING,
ABGANG TYPE STRING,
LEER TYPE STRING,
MEINS TYPE STRING,
KONTZ TYPE STRING,
KONTI TYPE STRING,
VKWRT TYPE STRING,
WAERS TYPE STRING,
OIEXGNUM TYPE STRING,
CHARG TYPE STRING,
BTEXT TYPE STRING,
USNAM TYPE STRING,
MJAHR TYPE STRING,
X_SELKZ TYPE STRING,
VGART TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
WERKX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIAMMAT_ALV2_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_ROIAMMAT_ALV2_STR-LGORT sy-vline 
WA_ROIAMMAT_ALV2_STR-BWART sy-vline 
WA_ROIAMMAT_ALV2_STR-SOBKZ sy-vline 
WA_ROIAMMAT_ALV2_STR-MBLNR sy-vline 
WA_ROIAMMAT_ALV2_STR-ZEILE sy-vline 
WA_ROIAMMAT_ALV2_STR-BUDAT sy-vline 
WA_ROIAMMAT_ALV2_STR-MENGE sy-vline 
WA_ROIAMMAT_ALV2_STR-ABGANG sy-vline 
WA_ROIAMMAT_ALV2_STR-LEER sy-vline 
WA_ROIAMMAT_ALV2_STR-MEINS sy-vline 
WA_ROIAMMAT_ALV2_STR-KONTZ sy-vline 
WA_ROIAMMAT_ALV2_STR-KONTI sy-vline 
WA_ROIAMMAT_ALV2_STR-VKWRT sy-vline 
WA_ROIAMMAT_ALV2_STR-WAERS sy-vline 
WA_ROIAMMAT_ALV2_STR-OIEXGNUM sy-vline 
WA_ROIAMMAT_ALV2_STR-CHARG sy-vline 
WA_ROIAMMAT_ALV2_STR-BTEXT sy-vline 
WA_ROIAMMAT_ALV2_STR-USNAM sy-vline 
WA_ROIAMMAT_ALV2_STR-MJAHR sy-vline 
WA_ROIAMMAT_ALV2_STR-X_SELKZ sy-vline 
WA_ROIAMMAT_ALV2_STR-VGART sy-vline 
WA_ROIAMMAT_ALV2_STR-MATNR sy-vline 
WA_ROIAMMAT_ALV2_STR-MAKTX sy-vline 
WA_ROIAMMAT_ALV2_STR-WERKX sy-vline      INTO ld_text SEPARATED BY SPACE.

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