ABAP Select data from SAP table REEW_FLURST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEW_FLURST
*  INTO TABLE @DATA(IT_REEW_FLURST2).
*--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_REEW_FLURST INDEX 1 INTO DATA(WA_REEW_FLURST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEW_FLURST>-MANDT = 1.
<REEW_FLURST>-INTRENO_FL = 1.
<REEW_FLURST>-LAND1 = 1.
<REEW_FLURST>-LANDX = 1.
<REEW_FLURST>-BUNDESLAND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEW_FLURST-BEZEI, sy-vline,
  WA_REEW_FLURST-GEMARKUNG, sy-vline,
  WA_REEW_FLURST-XGEMARK, sy-vline,
  WA_REEW_FLURST-FLUR, sy-vline,
  WA_REEW_FLURST-FLURSTUECK, sy-vline,
  WA_REEW_FLURST-KREIS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEW_FLURST 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_REEW_FLURST 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_REEW_FLURST INTO WA_REEW_FLURST.


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

*Conversion exit ALPHA, internal->external for field PARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEW_FLURST-PARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEW_FLURST-PARTNR.
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_REEW_FLURST_STR, 
MANDT TYPE STRING,
INTRENO_FL TYPE STRING,
LAND1 TYPE STRING,
LANDX TYPE STRING,
BUNDESLAND TYPE STRING,
BEZEI TYPE STRING,
GEMARKUNG TYPE STRING,
XGEMARK TYPE STRING,
FLUR TYPE STRING,
FLURSTUECK TYPE STRING,
KREIS TYPE STRING,
XKREIS TYPE STRING,
GEMEINDE TYPE STRING,
XGEMEINDE TYPE STRING,
GUELTIG_VON_F TYPE STRING,
GUELTIG_BIS_F TYPE STRING,
PARTNR TYPE STRING,
XWEIGE TYPE STRING,
FLURSTKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEW_FLURST_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_REEW_FLURST_STR-MANDT sy-vline 
WA_REEW_FLURST_STR-INTRENO_FL sy-vline 
WA_REEW_FLURST_STR-LAND1 sy-vline 
WA_REEW_FLURST_STR-LANDX sy-vline 
WA_REEW_FLURST_STR-BUNDESLAND sy-vline 
WA_REEW_FLURST_STR-BEZEI sy-vline 
WA_REEW_FLURST_STR-GEMARKUNG sy-vline 
WA_REEW_FLURST_STR-XGEMARK sy-vline 
WA_REEW_FLURST_STR-FLUR sy-vline 
WA_REEW_FLURST_STR-FLURSTUECK sy-vline 
WA_REEW_FLURST_STR-KREIS sy-vline 
WA_REEW_FLURST_STR-XKREIS sy-vline 
WA_REEW_FLURST_STR-GEMEINDE sy-vline 
WA_REEW_FLURST_STR-XGEMEINDE sy-vline 
WA_REEW_FLURST_STR-GUELTIG_VON_F sy-vline 
WA_REEW_FLURST_STR-GUELTIG_BIS_F sy-vline 
WA_REEW_FLURST_STR-PARTNR sy-vline 
WA_REEW_FLURST_STR-XWEIGE sy-vline 
WA_REEW_FLURST_STR-FLURSTKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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