ABAP Select data from SAP table RNPOL_CASE_TO_PERSON into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPOL_CASE_TO_PERSON
*  INTO TABLE @DATA(IT_RNPOL_CASE_TO_PERSON2).
*--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_RNPOL_CASE_TO_PERSON INDEX 1 INTO DATA(WA_RNPOL_CASE_TO_PERSON2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPOL_CASE_TO_PERSON>-BARNR = 1.
<RNPOL_CASE_TO_PERSON>-FARNR = 1.
<RNPOL_CASE_TO_PERSON>-EARNR = 1.
<RNPOL_CASE_TO_PERSON>-HARNR = 1.
<RNPOL_CASE_TO_PERSON>-UARNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPOL_CASE_TO_PERSON-DARNR, sy-vline,
  WA_RNPOL_CASE_TO_PERSON-OARNR, sy-vline,
  WA_RNPOL_CASE_TO_PERSON-AARNR, sy-vline,
  WA_RNPOL_CASE_TO_PERSON-NARNR, sy-vline,
  WA_RNPOL_CASE_TO_PERSON-GARNR, sy-vline,
  WA_RNPOL_CASE_TO_PERSON-LANR_BARNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPOL_CASE_TO_PERSON 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_RNPOL_CASE_TO_PERSON 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_RNPOL_CASE_TO_PERSON INTO WA_RNPOL_CASE_TO_PERSON.


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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field P115_VA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPOL_CASE_TO_PERSON-P115_VA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPOL_CASE_TO_PERSON-P115_VA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field P115_BA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPOL_CASE_TO_PERSON-P115_BA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPOL_CASE_TO_PERSON-P115_BA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field P115_VA2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPOL_CASE_TO_PERSON-P115_VA2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPOL_CASE_TO_PERSON-P115_VA2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field P115_BA2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPOL_CASE_TO_PERSON-P115_BA2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPOL_CASE_TO_PERSON-P115_BA2.
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_RNPOL_CASE_TO_PERSON_STR, 
BARNR TYPE STRING,
FARNR TYPE STRING,
EARNR TYPE STRING,
HARNR TYPE STRING,
UARNR TYPE STRING,
DARNR TYPE STRING,
OARNR TYPE STRING,
AARNR TYPE STRING,
NARNR TYPE STRING,
GARNR TYPE STRING,
LANR_BARNR TYPE STRING,
BSNR_EARNR TYPE STRING,
LANR_EARNR TYPE STRING,
BSNR_UARNR TYPE STRING,
LANR_UARNR TYPE STRING,
P115_VA TYPE STRING,
LANR_P115_VA TYPE STRING,
P115_BA TYPE STRING,
LANR_P115_BA TYPE STRING,
P115_VA2 TYPE STRING,
LANR_P115_VA2 TYPE STRING,
P115_BA2 TYPE STRING,
LANR_P115_BA2 TYPE STRING,
BARNRX TYPE STRING,
FARNRX TYPE STRING,
EARNRX TYPE STRING,
HARNRX TYPE STRING,
UARNRX TYPE STRING,
DARNRX TYPE STRING,
OARNRX TYPE STRING,
AARNRX TYPE STRING,
NARNRX TYPE STRING,
GARNRX TYPE STRING,
LANR_BARNRX TYPE STRING,
BSNR_EARNRX TYPE STRING,
LANR_EARNRX TYPE STRING,
BSNR_UARNRX TYPE STRING,
LANR_UARNRX TYPE STRING,
P115_VAX TYPE STRING,
LANR_P115_VAX TYPE STRING,
P115_BAX TYPE STRING,
LANR_P115_BAX TYPE STRING,
P115_VA2X TYPE STRING,
LANR_P115_VA2X TYPE STRING,
P115_BA2X TYPE STRING,
LANR_P115_BA2X TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPOL_CASE_TO_PERSON_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_RNPOL_CASE_TO_PERSON_STR-BARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-FARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-EARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-HARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-UARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-DARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-OARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-AARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-NARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-GARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_BARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-BSNR_EARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_EARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-BSNR_UARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_UARNR sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_VA sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_VA sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_BA sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_BA sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_VA2 sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_VA2 sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_BA2 sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_BA2 sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-BARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-FARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-EARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-HARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-UARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-DARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-OARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-AARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-NARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-GARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_BARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-BSNR_EARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_EARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-BSNR_UARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_UARNRX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_VAX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_VAX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_BAX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_BAX sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_VA2X sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_VA2X sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-P115_BA2X sy-vline 
WA_RNPOL_CASE_TO_PERSON_STR-LANR_P115_BA2X sy-vline      INTO ld_text SEPARATED BY SPACE.

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