ABAP Select data from SAP table RPCDUPD0_ALV into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCDUPD0_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 RPCDUPD0_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 RPCDUPD0_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_RPCDUPD0_ALV TYPE STANDARD TABLE OF RPCDUPD0_ALV,
      WA_RPCDUPD0_ALV TYPE RPCDUPD0_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: <RPCDUPD0_ALV> TYPE RPCDUPD0_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCDUPD0_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCDUPD0_ALV
  INTO TABLE IT_RPCDUPD0_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCDUPD0_ALV
*  INTO TABLE @DATA(IT_RPCDUPD0_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_RPCDUPD0_ALV INDEX 1 INTO DATA(WA_RPCDUPD0_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCDUPD0_ALV ASSIGNING <RPCDUPD0_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCDUPD0_ALV>-PERNR = 1.
<RPCDUPD0_ALV>-ENAME = 1.
<RPCDUPD0_ALV>-PERIOD = 1.
<RPCDUPD0_ALV>-FALL1 = 1.
<RPCDUPD0_ALV>-FALL2 = 1.

ENDLOOP.

LOOP AT IT_RPCDUPD0_ALV INTO WA_RPCDUPD0_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCDUPD0_ALV-FALL3, sy-vline,
  WA_RPCDUPD0_ALV-FALL4, sy-vline,
  WA_RPCDUPD0_ALV-FALL5, sy-vline,
  WA_RPCDUPD0_ALV-FALL6, sy-vline,
  WA_RPCDUPD0_ALV-FALL7, sy-vline,
  WA_RPCDUPD0_ALV-FALL8, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCDUPD0_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_RPCDUPD0_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_RPCDUPD0_ALV INTO WA_RPCDUPD0_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.
ENDFORM. 

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

TYPES: BEGIN OF T_RPCDUPD0_ALV_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
PERIOD TYPE STRING,
FALL1 TYPE STRING,
FALL2 TYPE STRING,
FALL3 TYPE STRING,
FALL4 TYPE STRING,
FALL5 TYPE STRING,
FALL6 TYPE STRING,
FALL7 TYPE STRING,
FALL8 TYPE STRING,
FALL9 TYPE STRING,
FALL10 TYPE STRING,
FALL11 TYPE STRING,
FALL12 TYPE STRING,
FALL13 TYPE STRING,
FALL14 TYPE STRING,
FALL15 TYPE STRING,
FALL16 TYPE STRING,
FALL17 TYPE STRING,
FALL18 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCDUPD0_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_RPCDUPD0_ALV_STR-PERNR sy-vline 
WA_RPCDUPD0_ALV_STR-ENAME sy-vline 
WA_RPCDUPD0_ALV_STR-PERIOD sy-vline 
WA_RPCDUPD0_ALV_STR-FALL1 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL2 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL3 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL4 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL5 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL6 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL7 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL8 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL9 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL10 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL11 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL12 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL13 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL14 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL15 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL16 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL17 sy-vline 
WA_RPCDUPD0_ALV_STR-FALL18 sy-vline      INTO ld_text SEPARATED BY SPACE.

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