ABAP Select data from SAP table ROIA09H_ALV30 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIA09H_ALV30 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 ROIA09H_ALV30. 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 ROIA09H_ALV30 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_ROIA09H_ALV30 TYPE STANDARD TABLE OF ROIA09H_ALV30,
      WA_ROIA09H_ALV30 TYPE ROIA09H_ALV30,
      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: <ROIA09H_ALV30> TYPE ROIA09H_ALV30.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ROIA09H_ALV30.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ROIA09H_ALV30
  INTO TABLE IT_ROIA09H_ALV30.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIA09H_ALV30
*  INTO TABLE @DATA(IT_ROIA09H_ALV302).
*--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_ROIA09H_ALV30 INDEX 1 INTO DATA(WA_ROIA09H_ALV302).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ROIA09H_ALV30 ASSIGNING <ROIA09H_ALV30>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIA09H_ALV30>-BUKRS = 1.
<ROIA09H_ALV30>-DOCUM = 1.
<ROIA09H_ALV30>-ITEM = 1.
<ROIA09H_ALV30>-INTQTY_SUM = 1.
<ROIA09H_ALV30>-SMENGE_SUM = 1.

ENDLOOP.

LOOP AT IT_ROIA09H_ALV30 INTO WA_ROIA09H_ALV30.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIA09H_ALV30-OPNQTY_SUM, sy-vline,
  WA_ROIA09H_ALV30-MEINS, sy-vline,
  WA_ROIA09H_ALV30-BISDAT, sy-vline,
  WA_ROIA09H_ALV30-MATNR, sy-vline,
  WA_ROIA09H_ALV30-EXGPTR, sy-vline,
  WA_ROIA09H_ALV30-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIA09H_ALV30 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_ROIA09H_ALV30 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_ROIA09H_ALV30 INTO WA_ROIA09H_ALV30.


*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 MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIA09H_ALV30-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIA09H_ALV30-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIA09H_ALV30-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIA09H_ALV30-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXGPTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIA09H_ALV30-EXGPTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIA09H_ALV30-EXGPTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXGNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIA09H_ALV30-EXGNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIA09H_ALV30-EXGNUM.
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_ROIA09H_ALV30_STR, 
BUKRS TYPE STRING,
DOCUM TYPE STRING,
ITEM TYPE STRING,
INTQTY_SUM TYPE STRING,
SMENGE_SUM TYPE STRING,
OPNQTY_SUM TYPE STRING,
MEINS TYPE STRING,
BISDAT TYPE STRING,
MATNR TYPE STRING,
EXGPTR TYPE STRING,
WERKS TYPE STRING,
EXGNUM TYPE STRING,
EXGTYP TYPE STRING,
CNTTYP TYPE STRING,
ENTLU TYPE STRING,
MAXET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIA09H_ALV30_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_ROIA09H_ALV30_STR-BUKRS sy-vline 
WA_ROIA09H_ALV30_STR-DOCUM sy-vline 
WA_ROIA09H_ALV30_STR-ITEM sy-vline 
WA_ROIA09H_ALV30_STR-INTQTY_SUM sy-vline 
WA_ROIA09H_ALV30_STR-SMENGE_SUM sy-vline 
WA_ROIA09H_ALV30_STR-OPNQTY_SUM sy-vline 
WA_ROIA09H_ALV30_STR-MEINS sy-vline 
WA_ROIA09H_ALV30_STR-BISDAT sy-vline 
WA_ROIA09H_ALV30_STR-MATNR sy-vline 
WA_ROIA09H_ALV30_STR-EXGPTR sy-vline 
WA_ROIA09H_ALV30_STR-WERKS sy-vline 
WA_ROIA09H_ALV30_STR-EXGNUM sy-vline 
WA_ROIA09H_ALV30_STR-EXGTYP sy-vline 
WA_ROIA09H_ALV30_STR-CNTTYP sy-vline 
WA_ROIA09H_ALV30_STR-ENTLU sy-vline 
WA_ROIA09H_ALV30_STR-MAXET sy-vline      INTO ld_text SEPARATED BY SPACE.

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