ABAP Select data from SAP table RPCBLAD0_ALV_MAIN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCBLAD0_ALV_MAIN 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 RPCBLAD0_ALV_MAIN. 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 RPCBLAD0_ALV_MAIN 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_RPCBLAD0_ALV_MAIN TYPE STANDARD TABLE OF RPCBLAD0_ALV_MAIN,
      WA_RPCBLAD0_ALV_MAIN TYPE RPCBLAD0_ALV_MAIN,
      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: <RPCBLAD0_ALV_MAIN> TYPE RPCBLAD0_ALV_MAIN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCBLAD0_ALV_MAIN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCBLAD0_ALV_MAIN
  INTO TABLE IT_RPCBLAD0_ALV_MAIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCBLAD0_ALV_MAIN
*  INTO TABLE @DATA(IT_RPCBLAD0_ALV_MAIN2).
*--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_RPCBLAD0_ALV_MAIN INDEX 1 INTO DATA(WA_RPCBLAD0_ALV_MAIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCBLAD0_ALV_MAIN ASSIGNING <RPCBLAD0_ALV_MAIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCBLAD0_ALV_MAIN>-WERKS = 1.
<RPCBLAD0_ALV_MAIN>-BTRTL = 1.
<RPCBLAD0_ALV_MAIN>-SBMOD = 1.
<RPCBLAD0_ALV_MAIN>-SACHA = 1.
<RPCBLAD0_ALV_MAIN>-PERNR = 1.

ENDLOOP.

LOOP AT IT_RPCBLAD0_ALV_MAIN INTO WA_RPCBLAD0_ALV_MAIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCBLAD0_ALV_MAIN-SNAME, sy-vline,
  WA_RPCBLAD0_ALV_MAIN-BSLKR, sy-vline,
  WA_RPCBLAD0_ALV_MAIN-LAG12, sy-vline,
  WA_RPCBLAD0_ALV_MAIN-LAG01, sy-vline,
  WA_RPCBLAD0_ALV_MAIN-BSLTX, sy-vline,
  WA_RPCBLAD0_ALV_MAIN-LAGTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCBLAD0_ALV_MAIN 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_RPCBLAD0_ALV_MAIN 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_RPCBLAD0_ALV_MAIN INTO WA_RPCBLAD0_ALV_MAIN.


*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_RPCBLAD0_ALV_MAIN_STR, 
WERKS TYPE STRING,
BTRTL TYPE STRING,
SBMOD TYPE STRING,
SACHA TYPE STRING,
PERNR TYPE STRING,
SNAME TYPE STRING,
BSLKR TYPE STRING,
LAG12 TYPE STRING,
LAG01 TYPE STRING,
BSLTX TYPE STRING,
LAGTX TYPE STRING,
TLZKP TYPE STRING,
STDAZ TYPE STRING,
BSLMO TYPE STRING,
BSLBR TYPE STRING,
BSLST TYPE STRING,
BSLAZ TYPE STRING,
WOKNZ TYPE STRING,
LAGSU TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCBLAD0_ALV_MAIN_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_RPCBLAD0_ALV_MAIN_STR-WERKS sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-BTRTL sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-SBMOD sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-SACHA sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-PERNR sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-SNAME sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-BSLKR sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-LAG12 sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-LAG01 sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-BSLTX sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-LAGTX sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-TLZKP sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-STDAZ sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-BSLMO sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-BSLBR sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-BSLST sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-BSLAZ sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-WOKNZ sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-LAGSU sy-vline 
WA_RPCBLAD0_ALV_MAIN_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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