ABAP Select data from SAP table RNPNT_NK_DI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPNT_NK_DI
*  INTO TABLE @DATA(IT_RNPNT_NK_DI2).
*--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_RNPNT_NK_DI INDEX 1 INTO DATA(WA_RNPNT_NK_DI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPNT_NK_DI>-INSTN = 1.
<RNPNT_NK_DI>-PNT_GA = 1.
<RNPNT_NK_DI>-STD_LN = 1.
<RNPNT_NK_DI>-STD_FN = 1.
<RNPNT_NK_DI>-STD_BN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPNT_NK_DI-BIRTHCTRY, sy-vline,
  WA_RNPNT_NK_DI-PNT_CD, sy-vline,
  WA_RNPNT_NK_DI-DTH_IND, sy-vline,
  WA_RNPNT_NK_DI-DTM_FRM, sy-vline,
  WA_RNPNT_NK_DI-DDAT_TO, sy-vline,
  WA_RNPNT_NK_DI-DTM_TO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPNT_NK_DI 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_RNPNT_NK_DI 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_RNPNT_NK_DI INTO WA_RNPNT_NK_DI.


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

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

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

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

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

*Conversion exit NLJUS, internal->external for field DOC_NUM
CALL FUNCTION 'CONVERSION_EXIT_NLJUS_OUTPUT'
  EXPORTING
    input =                      WA_RNPNT_NK_DI-DOC_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPNT_NK_DI-DOC_NUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPNT_NK_DI-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPNT_NK_DI-PATNR.
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_RNPNT_NK_DI_STR, 
INSTN TYPE STRING,
PNT_GA TYPE STRING,
STD_LN TYPE STRING,
STD_FN TYPE STRING,
STD_BN TYPE STRING,
BIRTHCTRY TYPE STRING,
PNT_CD TYPE STRING,
DTH_IND TYPE STRING,
DTM_FRM TYPE STRING,
DDAT_TO TYPE STRING,
DTM_TO TYPE STRING,
DTH_CAU TYPE STRING,
DTH_LOC TYPE STRING,
PAT_OCCU TYPE STRING,
EMPSC TYPE STRING,
ADDRNUMBER TYPE STRING,
CN_OCCU TYPE STRING,
RELGN TYPE STRING,
RES_IND TYPE STRING,
INA_IND TYPE STRING,
ORD_IND TYPE STRING,
VIP_IND TYPE STRING,
EADM_IND TYPE STRING,
QADM_IND TYPE STRING,
RIN_IND TYPE STRING,
CRT_USR TYPE STRING,
CRT_DAT TYPE STRING,
CHG_USR TYPE STRING,
CHG_DAT TYPE STRING,
CCL_USR TYPE STRING,
CCL_DAT TYPE STRING,
CCL_IND TYPE STRING,
RACE TYPE STRING,
SI_NUM TYPE STRING,
RFPNT TYPE STRING,
RFPNT_CD TYPE STRING,
DOC_TYP TYPE STRING,
DOC_NUM TYPE STRING,
EO_IND TYPE STRING,
EO_TYPE TYPE STRING,
PNT_EXTNR TYPE STRING,
DOB_UN TYPE STRING,
USER1 TYPE STRING,
USER2 TYPE STRING,
USER3 TYPE STRING,
USER4 TYPE STRING,
USER5 TYPE STRING,
USER6 TYPE STRING,
PATNR TYPE STRING,
PNT_ADR_KIND TYPE STRING,
INSID TYPE STRING,
IT_ISTAT_BPL TYPE STRING,
IT_TAXNUM_IND TYPE STRING,
IT_STP TYPE STRING,
IT_STP_ENDDT TYPE STRING,
IT_CONS_PERSDATA TYPE STRING,
/ISHFR/BIRTHRK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPNT_NK_DI_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_RNPNT_NK_DI_STR-INSTN sy-vline 
WA_RNPNT_NK_DI_STR-PNT_GA sy-vline 
WA_RNPNT_NK_DI_STR-STD_LN sy-vline 
WA_RNPNT_NK_DI_STR-STD_FN sy-vline 
WA_RNPNT_NK_DI_STR-STD_BN sy-vline 
WA_RNPNT_NK_DI_STR-BIRTHCTRY sy-vline 
WA_RNPNT_NK_DI_STR-PNT_CD sy-vline 
WA_RNPNT_NK_DI_STR-DTH_IND sy-vline 
WA_RNPNT_NK_DI_STR-DTM_FRM sy-vline 
WA_RNPNT_NK_DI_STR-DDAT_TO sy-vline 
WA_RNPNT_NK_DI_STR-DTM_TO sy-vline 
WA_RNPNT_NK_DI_STR-DTH_CAU sy-vline 
WA_RNPNT_NK_DI_STR-DTH_LOC sy-vline 
WA_RNPNT_NK_DI_STR-PAT_OCCU sy-vline 
WA_RNPNT_NK_DI_STR-EMPSC sy-vline 
WA_RNPNT_NK_DI_STR-ADDRNUMBER sy-vline 
WA_RNPNT_NK_DI_STR-CN_OCCU sy-vline 
WA_RNPNT_NK_DI_STR-RELGN sy-vline 
WA_RNPNT_NK_DI_STR-RES_IND sy-vline 
WA_RNPNT_NK_DI_STR-INA_IND sy-vline 
WA_RNPNT_NK_DI_STR-ORD_IND sy-vline 
WA_RNPNT_NK_DI_STR-VIP_IND sy-vline 
WA_RNPNT_NK_DI_STR-EADM_IND sy-vline 
WA_RNPNT_NK_DI_STR-QADM_IND sy-vline 
WA_RNPNT_NK_DI_STR-RIN_IND sy-vline 
WA_RNPNT_NK_DI_STR-CRT_USR sy-vline 
WA_RNPNT_NK_DI_STR-CRT_DAT sy-vline 
WA_RNPNT_NK_DI_STR-CHG_USR sy-vline 
WA_RNPNT_NK_DI_STR-CHG_DAT sy-vline 
WA_RNPNT_NK_DI_STR-CCL_USR sy-vline 
WA_RNPNT_NK_DI_STR-CCL_DAT sy-vline 
WA_RNPNT_NK_DI_STR-CCL_IND sy-vline 
WA_RNPNT_NK_DI_STR-RACE sy-vline 
WA_RNPNT_NK_DI_STR-SI_NUM sy-vline 
WA_RNPNT_NK_DI_STR-RFPNT sy-vline 
WA_RNPNT_NK_DI_STR-RFPNT_CD sy-vline 
WA_RNPNT_NK_DI_STR-DOC_TYP sy-vline 
WA_RNPNT_NK_DI_STR-DOC_NUM sy-vline 
WA_RNPNT_NK_DI_STR-EO_IND sy-vline 
WA_RNPNT_NK_DI_STR-EO_TYPE sy-vline 
WA_RNPNT_NK_DI_STR-PNT_EXTNR sy-vline 
WA_RNPNT_NK_DI_STR-DOB_UN sy-vline 
WA_RNPNT_NK_DI_STR-USER1 sy-vline 
WA_RNPNT_NK_DI_STR-USER2 sy-vline 
WA_RNPNT_NK_DI_STR-USER3 sy-vline 
WA_RNPNT_NK_DI_STR-USER4 sy-vline 
WA_RNPNT_NK_DI_STR-USER5 sy-vline 
WA_RNPNT_NK_DI_STR-USER6 sy-vline 
WA_RNPNT_NK_DI_STR-PATNR sy-vline 
WA_RNPNT_NK_DI_STR-PNT_ADR_KIND sy-vline 
WA_RNPNT_NK_DI_STR-INSID sy-vline 
WA_RNPNT_NK_DI_STR-IT_ISTAT_BPL sy-vline 
WA_RNPNT_NK_DI_STR-IT_TAXNUM_IND sy-vline 
WA_RNPNT_NK_DI_STR-IT_STP sy-vline 
WA_RNPNT_NK_DI_STR-IT_STP_ENDDT sy-vline 
WA_RNPNT_NK_DI_STR-IT_CONS_PERSDATA sy-vline 
WA_RNPNT_NK_DI_STR-/ISHFR/BIRTHRK sy-vline      INTO ld_text SEPARATED BY SPACE.

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