ABAP Select data from SAP table RELS_FLURST_AN 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_AN 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_AN. 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_AN 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_AN TYPE STANDARD TABLE OF RELS_FLURST_AN,
      WA_RELS_FLURST_AN TYPE RELS_FLURST_AN,
      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_AN> TYPE RELS_FLURST_AN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELS_FLURST_AN
*  INTO TABLE @DATA(IT_RELS_FLURST_AN2).
*--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_AN INDEX 1 INTO DATA(WA_RELS_FLURST_AN2).


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

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

ENDLOOP.

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

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


*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_AN-FLUR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_FLURST_AN-FLUR.
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_AN-FEINS_KAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_FLURST_AN-FEINS_KAT.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_RELS_FLURST_AN-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_FLURST_AN-SWENR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ANLKL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RELS_FLURST_AN-ANLKL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_FLURST_AN-ANLKL.
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_AN_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,
FLAECHE_KAT TYPE STRING,
FEINS_KAT TYPE STRING,
PARTNR_WEIGE TYPE STRING,
PARTNR_WEIGE_EXT TYPE STRING,
VBUND_WEIGE TYPE STRING,
NAME_WEIGE TYPE STRING,
BESITZFLAECHE TYPE STRING,
BESITZFLAECHE_FEINS TYPE STRING,
FLAECHE_AN TYPE STRING,
FEINS_AN TYPE STRING,
BUKRS_AN TYPE STRING,
SWENR TYPE STRING,
ANL_TEXT TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
ANLKL TYPE STRING,
TXK50 TYPE STRING,
KANSW_HR TYPE STRING,
WAERS_HR TYPE STRING,
KANSW_HR_FE TYPE STRING,
KANSW_SB TYPE STRING,
WAERS_SB TYPE STRING,
KANSW_SB_FE TYPE STRING,
KANSW_KO TYPE STRING,
WAERS_KO TYPE STRING,
KANSW_KO_FE TYPE STRING,
KANSW_S1 TYPE STRING,
WAERS_S1 TYPE STRING,
KANSW_S1_FE TYPE STRING,
KANSW_S2 TYPE STRING,
WAERS_S2 TYPE STRING,
KANSW_S2_FE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELS_FLURST_AN_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_AN_STR-MANDT sy-vline 
WA_RELS_FLURST_AN_STR-INTRENO_FL sy-vline 
WA_RELS_FLURST_AN_STR-LAND1 sy-vline 
WA_RELS_FLURST_AN_STR-LANDX sy-vline 
WA_RELS_FLURST_AN_STR-BUNDESLAND sy-vline 
WA_RELS_FLURST_AN_STR-BEZEI sy-vline 
WA_RELS_FLURST_AN_STR-GEMARKUNG sy-vline 
WA_RELS_FLURST_AN_STR-XGEMARK sy-vline 
WA_RELS_FLURST_AN_STR-FLUR sy-vline 
WA_RELS_FLURST_AN_STR-FLURSTUECK sy-vline 
WA_RELS_FLURST_AN_STR-KREIS sy-vline 
WA_RELS_FLURST_AN_STR-XKREIS sy-vline 
WA_RELS_FLURST_AN_STR-GEMEINDE sy-vline 
WA_RELS_FLURST_AN_STR-XGEMEINDE sy-vline 
WA_RELS_FLURST_AN_STR-FLAECHE_KAT sy-vline 
WA_RELS_FLURST_AN_STR-FEINS_KAT sy-vline 
WA_RELS_FLURST_AN_STR-PARTNR_WEIGE sy-vline 
WA_RELS_FLURST_AN_STR-PARTNR_WEIGE_EXT sy-vline 
WA_RELS_FLURST_AN_STR-VBUND_WEIGE sy-vline 
WA_RELS_FLURST_AN_STR-NAME_WEIGE sy-vline 
WA_RELS_FLURST_AN_STR-BESITZFLAECHE sy-vline 
WA_RELS_FLURST_AN_STR-BESITZFLAECHE_FEINS sy-vline 
WA_RELS_FLURST_AN_STR-FLAECHE_AN sy-vline 
WA_RELS_FLURST_AN_STR-FEINS_AN sy-vline 
WA_RELS_FLURST_AN_STR-BUKRS_AN sy-vline 
WA_RELS_FLURST_AN_STR-SWENR sy-vline 
WA_RELS_FLURST_AN_STR-ANL_TEXT sy-vline 
WA_RELS_FLURST_AN_STR-ANLN1 sy-vline 
WA_RELS_FLURST_AN_STR-ANLN2 sy-vline 
WA_RELS_FLURST_AN_STR-ANLKL sy-vline 
WA_RELS_FLURST_AN_STR-TXK50 sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_HR sy-vline 
WA_RELS_FLURST_AN_STR-WAERS_HR sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_HR_FE sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_SB sy-vline 
WA_RELS_FLURST_AN_STR-WAERS_SB sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_SB_FE sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_KO sy-vline 
WA_RELS_FLURST_AN_STR-WAERS_KO sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_KO_FE sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_S1 sy-vline 
WA_RELS_FLURST_AN_STR-WAERS_S1 sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_S1_FE sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_S2 sy-vline 
WA_RELS_FLURST_AN_STR-WAERS_S2 sy-vline 
WA_RELS_FLURST_AN_STR-KANSW_S2_FE sy-vline      INTO ld_text SEPARATED BY SPACE.

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