ABAP Select data from SAP table RPCDTAQ0_ALV2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCDTAQ0_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 RPCDTAQ0_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 RPCDTAQ0_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_RPCDTAQ0_ALV2 TYPE STANDARD TABLE OF RPCDTAQ0_ALV2,
      WA_RPCDTAQ0_ALV2 TYPE RPCDTAQ0_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: <RPCDTAQ0_ALV2> TYPE RPCDTAQ0_ALV2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCDTAQ0_ALV2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCDTAQ0_ALV2
  INTO TABLE IT_RPCDTAQ0_ALV2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCDTAQ0_ALV2
*  INTO TABLE @DATA(IT_RPCDTAQ0_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_RPCDTAQ0_ALV2 INDEX 1 INTO DATA(WA_RPCDTAQ0_ALV22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCDTAQ0_ALV2 ASSIGNING <RPCDTAQ0_ALV2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCDTAQ0_ALV2>-MANDT = 1.
<RPCDTAQ0_ALV2>-VBLNR = 1.
<RPCDTAQ0_ALV2>-LAUFD = 1.
<RPCDTAQ0_ALV2>-LAUFI = 1.
<RPCDTAQ0_ALV2>-RZAWE = 1.

ENDLOOP.

LOOP AT IT_RPCDTAQ0_ALV2 INTO WA_RPCDTAQ0_ALV2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCDTAQ0_ALV2-ZBUKR, sy-vline,
  WA_RPCDTAQ0_ALV2-HBKID, sy-vline,
  WA_RPCDTAQ0_ALV2-HKTID, sy-vline,
  WA_RPCDTAQ0_ALV2-RBETR, sy-vline,
  WA_RPCDTAQ0_ALV2-WAERS, sy-vline,
  WA_RPCDTAQ0_ALV2-ZNME1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCDTAQ0_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_RPCDTAQ0_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_RPCDTAQ0_ALV2 INTO WA_RPCDTAQ0_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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RPCDTAQ0_ALV2_STR, 
MANDT TYPE STRING,
VBLNR TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
RZAWE TYPE STRING,
ZBUKR TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
RBETR TYPE STRING,
WAERS TYPE STRING,
ZNME1 TYPE STRING,
ZPSTL TYPE STRING,
ZORT1 TYPE STRING,
ZBNKS TYPE STRING,
ZBNKL TYPE STRING,
ZBNKN TYPE STRING,
BKREF TYPE STRING,
XBLNR TYPE STRING,
SGTXT TYPE STRING,
DUMMY1 TYPE STRING,
DUMMY2 TYPE STRING,
DUMMY3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCDTAQ0_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_RPCDTAQ0_ALV2_STR-MANDT sy-vline 
WA_RPCDTAQ0_ALV2_STR-VBLNR sy-vline 
WA_RPCDTAQ0_ALV2_STR-LAUFD sy-vline 
WA_RPCDTAQ0_ALV2_STR-LAUFI sy-vline 
WA_RPCDTAQ0_ALV2_STR-RZAWE sy-vline 
WA_RPCDTAQ0_ALV2_STR-ZBUKR sy-vline 
WA_RPCDTAQ0_ALV2_STR-HBKID sy-vline 
WA_RPCDTAQ0_ALV2_STR-HKTID sy-vline 
WA_RPCDTAQ0_ALV2_STR-RBETR sy-vline 
WA_RPCDTAQ0_ALV2_STR-WAERS sy-vline 
WA_RPCDTAQ0_ALV2_STR-ZNME1 sy-vline 
WA_RPCDTAQ0_ALV2_STR-ZPSTL sy-vline 
WA_RPCDTAQ0_ALV2_STR-ZORT1 sy-vline 
WA_RPCDTAQ0_ALV2_STR-ZBNKS sy-vline 
WA_RPCDTAQ0_ALV2_STR-ZBNKL sy-vline 
WA_RPCDTAQ0_ALV2_STR-ZBNKN sy-vline 
WA_RPCDTAQ0_ALV2_STR-BKREF sy-vline 
WA_RPCDTAQ0_ALV2_STR-XBLNR sy-vline 
WA_RPCDTAQ0_ALV2_STR-SGTXT sy-vline 
WA_RPCDTAQ0_ALV2_STR-DUMMY1 sy-vline 
WA_RPCDTAQ0_ALV2_STR-DUMMY2 sy-vline 
WA_RPCDTAQ0_ALV2_STR-DUMMY3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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