ABAP Select data from SAP table RNCUS_SEARCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNCUS_SEARCH
*  INTO TABLE @DATA(IT_RNCUS_SEARCH2).
*--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_RNCUS_SEARCH INDEX 1 INTO DATA(WA_RNCUS_SEARCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNCUS_SEARCH>-PARTNER_NUMBER = 1.
<RNCUS_SEARCH>-SEARCH1 = 1.
<RNCUS_SEARCH>-SEARCH2 = 1.
<RNCUS_SEARCH>-EXTERNAL_NUMBER = 1.
<RNCUS_SEARCH>-CITY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNCUS_SEARCH-STREET, sy-vline,
  WA_RNCUS_SEARCH-HOUSE_NUMBER, sy-vline,
  WA_RNCUS_SEARCH-PARTNER_ROLE, sy-vline,
  WA_RNCUS_SEARCH-POST_CODE1, sy-vline,
  WA_RNCUS_SEARCH-COUNTRY, sy-vline,
  WA_RNCUS_SEARCH-NATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNCUS_SEARCH 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_RNCUS_SEARCH 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_RNCUS_SEARCH INTO WA_RNCUS_SEARCH.


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

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

*Conversion exit ALPHA, internal->external for field GPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNCUS_SEARCH-GPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNCUS_SEARCH-GPARTNER.
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_RNCUS_SEARCH_STR, 
PARTNER_NUMBER TYPE STRING,
SEARCH1 TYPE STRING,
SEARCH2 TYPE STRING,
EXTERNAL_NUMBER TYPE STRING,
CITY TYPE STRING,
STREET TYPE STRING,
HOUSE_NUMBER TYPE STRING,
PARTNER_ROLE TYPE STRING,
POST_CODE1 TYPE STRING,
COUNTRY TYPE STRING,
NATION TYPE STRING,
CITY_MC TYPE STRING,
STREET_MC TYPE STRING,
COUNTY TYPE STRING,
TOWNSHIP TYPE STRING,
COUNTY_MC TYPE STRING,
TOWNSHIP_MC TYPE STRING,
IDTYPE TYPE STRING,
IDNUMBER TYPE STRING,
FIRST_NAME TYPE STRING,
LAST_NAME TYPE STRING,
BIRTH_DATE TYPE STRING,
BIRTH_PLACE TYPE STRING,
ORG_NAME1 TYPE STRING,
ORG_NAME2 TYPE STRING,
ORG_NAME3 TYPE STRING,
ORG_NAME4 TYPE STRING,
LOCATION1 TYPE STRING,
LOCATION2 TYPE STRING,
LOCATION3 TYPE STRING,
NAME_GRP1 TYPE STRING,
NAME_GRP2 TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
INSTN TYPE STRING,
CCODE TYPE STRING,
SHORT_NAME TYPE STRING,
DEL_FLG TYPE STRING,
BLK_IND TYPE STRING,
GPARTNER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNCUS_SEARCH_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_RNCUS_SEARCH_STR-PARTNER_NUMBER sy-vline 
WA_RNCUS_SEARCH_STR-SEARCH1 sy-vline 
WA_RNCUS_SEARCH_STR-SEARCH2 sy-vline 
WA_RNCUS_SEARCH_STR-EXTERNAL_NUMBER sy-vline 
WA_RNCUS_SEARCH_STR-CITY sy-vline 
WA_RNCUS_SEARCH_STR-STREET sy-vline 
WA_RNCUS_SEARCH_STR-HOUSE_NUMBER sy-vline 
WA_RNCUS_SEARCH_STR-PARTNER_ROLE sy-vline 
WA_RNCUS_SEARCH_STR-POST_CODE1 sy-vline 
WA_RNCUS_SEARCH_STR-COUNTRY sy-vline 
WA_RNCUS_SEARCH_STR-NATION sy-vline 
WA_RNCUS_SEARCH_STR-CITY_MC sy-vline 
WA_RNCUS_SEARCH_STR-STREET_MC sy-vline 
WA_RNCUS_SEARCH_STR-COUNTY sy-vline 
WA_RNCUS_SEARCH_STR-TOWNSHIP sy-vline 
WA_RNCUS_SEARCH_STR-COUNTY_MC sy-vline 
WA_RNCUS_SEARCH_STR-TOWNSHIP_MC sy-vline 
WA_RNCUS_SEARCH_STR-IDTYPE sy-vline 
WA_RNCUS_SEARCH_STR-IDNUMBER sy-vline 
WA_RNCUS_SEARCH_STR-FIRST_NAME sy-vline 
WA_RNCUS_SEARCH_STR-LAST_NAME sy-vline 
WA_RNCUS_SEARCH_STR-BIRTH_DATE sy-vline 
WA_RNCUS_SEARCH_STR-BIRTH_PLACE sy-vline 
WA_RNCUS_SEARCH_STR-ORG_NAME1 sy-vline 
WA_RNCUS_SEARCH_STR-ORG_NAME2 sy-vline 
WA_RNCUS_SEARCH_STR-ORG_NAME3 sy-vline 
WA_RNCUS_SEARCH_STR-ORG_NAME4 sy-vline 
WA_RNCUS_SEARCH_STR-LOCATION1 sy-vline 
WA_RNCUS_SEARCH_STR-LOCATION2 sy-vline 
WA_RNCUS_SEARCH_STR-LOCATION3 sy-vline 
WA_RNCUS_SEARCH_STR-NAME_GRP1 sy-vline 
WA_RNCUS_SEARCH_STR-NAME_GRP2 sy-vline 
WA_RNCUS_SEARCH_STR-NAME1 sy-vline 
WA_RNCUS_SEARCH_STR-NAME2 sy-vline 
WA_RNCUS_SEARCH_STR-INSTN sy-vline 
WA_RNCUS_SEARCH_STR-CCODE sy-vline 
WA_RNCUS_SEARCH_STR-SHORT_NAME sy-vline 
WA_RNCUS_SEARCH_STR-DEL_FLG sy-vline 
WA_RNCUS_SEARCH_STR-BLK_IND sy-vline 
WA_RNCUS_SEARCH_STR-GPARTNER sy-vline      INTO ld_text SEPARATED BY SPACE.

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