ABAP Select data from SAP table REIT_RFVIAB30 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REIT_RFVIAB30 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 REIT_RFVIAB30. 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 REIT_RFVIAB30 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_REIT_RFVIAB30 TYPE STANDARD TABLE OF REIT_RFVIAB30,
      WA_REIT_RFVIAB30 TYPE REIT_RFVIAB30,
      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: <REIT_RFVIAB30> TYPE REIT_RFVIAB30.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REIT_RFVIAB30.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REIT_RFVIAB30
  INTO TABLE IT_REIT_RFVIAB30.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REIT_RFVIAB30
*  INTO TABLE @DATA(IT_REIT_RFVIAB302).
*--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_REIT_RFVIAB30 INDEX 1 INTO DATA(WA_REIT_RFVIAB302).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REIT_RFVIAB30 ASSIGNING <REIT_RFVIAB30>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REIT_RFVIAB30>-BUKRS = 1.
<REIT_RFVIAB30>-SBERI = 1.
<REIT_RFVIAB30>-ANLN1 = 1.
<REIT_RFVIAB30>-ANLN2 = 1.
<REIT_RFVIAB30>-BELNR = 1.

ENDLOOP.

LOOP AT IT_REIT_RFVIAB30 INTO WA_REIT_RFVIAB30.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REIT_RFVIAB30-GJAHR, sy-vline,
  WA_REIT_RFVIAB30-MONAT, sy-vline,
  WA_REIT_RFVIAB30-BUDAT, sy-vline,
  WA_REIT_RFVIAB30-PVSTB, sy-vline,
  WA_REIT_RFVIAB30-MWSKZ, sy-vline,
  WA_REIT_RFVIAB30-BWASL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REIT_RFVIAB30 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_REIT_RFVIAB30 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_REIT_RFVIAB30 INTO WA_REIT_RFVIAB30.


*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 SBERI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIT_RFVIAB30-SBERI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIT_RFVIAB30-SBERI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIT_RFVIAB30-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIT_RFVIAB30-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIT_RFVIAB30-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIT_RFVIAB30-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIT_RFVIAB30-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIT_RFVIAB30-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REIT_RFVIAB30-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIT_RFVIAB30-GJAHR.
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_REIT_RFVIAB30_STR, 
BUKRS TYPE STRING,
SBERI TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
BUDAT TYPE STRING,
PVSTB TYPE STRING,
MWSKZ TYPE STRING,
BWASL TYPE STRING,
AFABE TYPE STRING,
GKNKZ TYPE STRING,
RDSBL TYPE STRING,
FBLSL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REIT_RFVIAB30_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_REIT_RFVIAB30_STR-BUKRS sy-vline 
WA_REIT_RFVIAB30_STR-SBERI sy-vline 
WA_REIT_RFVIAB30_STR-ANLN1 sy-vline 
WA_REIT_RFVIAB30_STR-ANLN2 sy-vline 
WA_REIT_RFVIAB30_STR-BELNR sy-vline 
WA_REIT_RFVIAB30_STR-GJAHR sy-vline 
WA_REIT_RFVIAB30_STR-MONAT sy-vline 
WA_REIT_RFVIAB30_STR-BUDAT sy-vline 
WA_REIT_RFVIAB30_STR-PVSTB sy-vline 
WA_REIT_RFVIAB30_STR-MWSKZ sy-vline 
WA_REIT_RFVIAB30_STR-BWASL sy-vline 
WA_REIT_RFVIAB30_STR-AFABE sy-vline 
WA_REIT_RFVIAB30_STR-GKNKZ sy-vline 
WA_REIT_RFVIAB30_STR-RDSBL sy-vline 
WA_REIT_RFVIAB30_STR-FBLSL sy-vline      INTO ld_text SEPARATED BY SPACE.

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