ABAP Select data from SAP table RBD_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RBD_ALV
*  INTO TABLE @DATA(IT_RBD_ALV2).
*--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_RBD_ALV INDEX 1 INTO DATA(WA_RBD_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RBD_ALV>-ICON = 1.
<RBD_ALV>-MESTYP = 1.
<RBD_ALV>-VBELN = 1.
<RBD_ALV>-VBPOS = 1.
<RBD_ALV>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RBD_ALV-WERKS, sy-vline,
  WA_RBD_ALV-STLAN, sy-vline,
  WA_RBD_ALV-STLNR, sy-vline,
  WA_RBD_ALV-DOKNR, sy-vline,
  WA_RBD_ALV-DOKAR, sy-vline,
  WA_RBD_ALV-DOKTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RBD_ALV 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_RBD_ALV 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_RBD_ALV INTO WA_RBD_ALV.


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

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

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RBD_ALV-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RBD_ALV-STLNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field ALE_AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RBD_ALV-ALE_AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RBD_ALV-ALE_AENNR.
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_RBD_ALV_STR, 
ICON TYPE STRING,
MESTYP TYPE STRING,
VBELN TYPE STRING,
VBPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
STLAN TYPE STRING,
STLNR TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
STLAL TYPE STRING,
AUSKZ TYPE STRING,
SELKZ TYPE STRING,
INPKZ TYPE STRING,
FLG_VAR TYPE STRING,
FLG_ALT TYPE STRING,
FLG_WRK TYPE STRING,
CSLTY TYPE STRING,
FLG_EOA TYPE STRING,
FLG_SENT TYPE STRING,
FLG_LOEKZ TYPE STRING,
DATUV TYPE STRING,
AENNR TYPE STRING,
ALE_DATUV TYPE STRING,
ALE_AENNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RBD_ALV_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_RBD_ALV_STR-ICON sy-vline 
WA_RBD_ALV_STR-MESTYP sy-vline 
WA_RBD_ALV_STR-VBELN sy-vline 
WA_RBD_ALV_STR-VBPOS sy-vline 
WA_RBD_ALV_STR-MATNR sy-vline 
WA_RBD_ALV_STR-WERKS sy-vline 
WA_RBD_ALV_STR-STLAN sy-vline 
WA_RBD_ALV_STR-STLNR sy-vline 
WA_RBD_ALV_STR-DOKNR sy-vline 
WA_RBD_ALV_STR-DOKAR sy-vline 
WA_RBD_ALV_STR-DOKTL sy-vline 
WA_RBD_ALV_STR-DOKVR sy-vline 
WA_RBD_ALV_STR-STLAL sy-vline 
WA_RBD_ALV_STR-AUSKZ sy-vline 
WA_RBD_ALV_STR-SELKZ sy-vline 
WA_RBD_ALV_STR-INPKZ sy-vline 
WA_RBD_ALV_STR-FLG_VAR sy-vline 
WA_RBD_ALV_STR-FLG_ALT sy-vline 
WA_RBD_ALV_STR-FLG_WRK sy-vline 
WA_RBD_ALV_STR-CSLTY sy-vline 
WA_RBD_ALV_STR-FLG_EOA sy-vline 
WA_RBD_ALV_STR-FLG_SENT sy-vline 
WA_RBD_ALV_STR-FLG_LOEKZ sy-vline 
WA_RBD_ALV_STR-DATUV sy-vline 
WA_RBD_ALV_STR-AENNR sy-vline 
WA_RBD_ALV_STR-ALE_DATUV sy-vline 
WA_RBD_ALV_STR-ALE_AENNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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