ABAP Select data from SAP table RELS_FLURST_NART into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELS_FLURST_NART
*  INTO TABLE @DATA(IT_RELS_FLURST_NART2).
*--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_RELS_FLURST_NART INDEX 1 INTO DATA(WA_RELS_FLURST_NART2).


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

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

ENDLOOP.

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

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


*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_RELS_FLURST_NART-FLUR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_FLURST_NART-FLUR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field FEINS_KAT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELS_FLURST_NART-FEINS_KAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_FLURST_NART-FEINS_KAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field FEINS_NA
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELS_FLURST_NART-FEINS_NA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_FLURST_NART-FEINS_NA.
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_RELS_FLURST_NART_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,
PARTNR_KATAMT TYPE STRING,
PARTNR_KATAMT_EXT TYPE STRING,
NAME_KATAMT TYPE STRING,
FLAECHE_KAT TYPE STRING,
FEINS_KAT TYPE STRING,
COUNTRY TYPE STRING,
STATE TYPE STRING,
SLIDENUM TYPE STRING,
CLASSIFICATION TYPE STRING,
XMCLASS TYPE STRING,
FLAECHE_NA TYPE STRING,
FEINS_NA TYPE STRING,
BODENKLASSE TYPE STRING,
XBODENKLASSE TYPE STRING,
ZUSTANDSSTUFE TYPE STRING,
BODENART TYPE STRING,
XBODENART TYPE STRING,
EMZ TYPE STRING,
FARMLANDDIGIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELS_FLURST_NART_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_RELS_FLURST_NART_STR-MANDT sy-vline 
WA_RELS_FLURST_NART_STR-INTRENO_FL sy-vline 
WA_RELS_FLURST_NART_STR-LAND1 sy-vline 
WA_RELS_FLURST_NART_STR-LANDX sy-vline 
WA_RELS_FLURST_NART_STR-BUNDESLAND sy-vline 
WA_RELS_FLURST_NART_STR-BEZEI sy-vline 
WA_RELS_FLURST_NART_STR-GEMARKUNG sy-vline 
WA_RELS_FLURST_NART_STR-XGEMARK sy-vline 
WA_RELS_FLURST_NART_STR-FLUR sy-vline 
WA_RELS_FLURST_NART_STR-FLURSTUECK sy-vline 
WA_RELS_FLURST_NART_STR-KREIS sy-vline 
WA_RELS_FLURST_NART_STR-XKREIS sy-vline 
WA_RELS_FLURST_NART_STR-GEMEINDE sy-vline 
WA_RELS_FLURST_NART_STR-XGEMEINDE sy-vline 
WA_RELS_FLURST_NART_STR-PARTNR_KATAMT sy-vline 
WA_RELS_FLURST_NART_STR-PARTNR_KATAMT_EXT sy-vline 
WA_RELS_FLURST_NART_STR-NAME_KATAMT sy-vline 
WA_RELS_FLURST_NART_STR-FLAECHE_KAT sy-vline 
WA_RELS_FLURST_NART_STR-FEINS_KAT sy-vline 
WA_RELS_FLURST_NART_STR-COUNTRY sy-vline 
WA_RELS_FLURST_NART_STR-STATE sy-vline 
WA_RELS_FLURST_NART_STR-SLIDENUM sy-vline 
WA_RELS_FLURST_NART_STR-CLASSIFICATION sy-vline 
WA_RELS_FLURST_NART_STR-XMCLASS sy-vline 
WA_RELS_FLURST_NART_STR-FLAECHE_NA sy-vline 
WA_RELS_FLURST_NART_STR-FEINS_NA sy-vline 
WA_RELS_FLURST_NART_STR-BODENKLASSE sy-vline 
WA_RELS_FLURST_NART_STR-XBODENKLASSE sy-vline 
WA_RELS_FLURST_NART_STR-ZUSTANDSSTUFE sy-vline 
WA_RELS_FLURST_NART_STR-BODENART sy-vline 
WA_RELS_FLURST_NART_STR-XBODENART sy-vline 
WA_RELS_FLURST_NART_STR-EMZ sy-vline 
WA_RELS_FLURST_NART_STR-FARMLANDDIGIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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