ABAP Select data from SAP table RNPAT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNPAT 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 RNPAT. 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 RNPAT 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_RNPAT TYPE STANDARD TABLE OF RNPAT,
      WA_RNPAT TYPE RNPAT,
      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: <RNPAT> TYPE RNPAT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPAT
*  INTO TABLE @DATA(IT_RNPAT2).
*--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_RNPAT INDEX 1 INTO DATA(WA_RNPAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPAT>-MANDT = 1.
<RNPAT>-EINRI = 1.
<RNPAT>-NNAME = 1.
<RNPAT>-VNAME = 1.
<RNPAT>-GBNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPAT-GBDAT, sy-vline,
  WA_RNPAT-GSCHL, sy-vline,
  WA_RNPAT-GSCHLE, sy-vline,
  WA_RNPAT-GSCHLTXT, sy-vline,
  WA_RNPAT-ANREX, sy-vline,
  WA_RNPAT-TITEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPAT 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_RNPAT 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_RNPAT INTO WA_RNPAT.


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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RNPAT-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPAT-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRSL
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RNPAT-SPRSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPAT-SPRSL.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field AGNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPAT-AGNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPAT-AGNUM.
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_RNPAT_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
NNAME TYPE STRING,
VNAME TYPE STRING,
GBNAM TYPE STRING,
GBDAT TYPE STRING,
GSCHL TYPE STRING,
GSCHLE TYPE STRING,
GSCHLTXT TYPE STRING,
ANREX TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
NAME2 TYPE STRING,
NATIO TYPE STRING,
NATXT TYPE STRING,
RESID TYPE STRING,
UNKNOWN_GBDAT TYPE STRING,
SPRAS TYPE STRING,
SPTXT TYPE STRING,
GLAND TYPE STRING,
GLANT TYPE STRING,
GBORT TYPE STRING,
FAMST TYPE STRING,
SPRSL TYPE STRING,
FATXT TYPE STRING,
KONFE TYPE STRING,
KOTXT TYPE STRING,
KTEXT TYPE STRING,
KZTXT TYPE STRING,
LGTXT TYPE STRING,
EXTNR TYPE STRING,
RVNUM TYPE STRING,
PASSTY TYPE STRING,
PASSTX TYPE STRING,
PASSNR TYPE STRING,
PFARR TYPE STRING,
PFTXT TYPE STRING,
RACE TYPE STRING,
RACETXT TYPE STRING,
INSID TYPE STRING,
ISTAT_BPL TYPE STRING,
ISTAT_BPLTXT TYPE STRING,
TAXNUM TYPE STRING,
TAXNUM_IND TYPE STRING,
STP TYPE STRING,
STP_ENDDT TYPE STRING,
SPEND TYPE STRING,
SPENT TYPE STRING,
SPELT TYPE STRING,
VIPKZ TYPE STRING,
NOTAN TYPE STRING,
KRZAN TYPE STRING,
PFORT TYPE STRING,
PFAKZ TYPE STRING,
RISKF TYPE STRING,
TODKZ TYPE STRING,
INACT TYPE STRING,
CONS_PERSDATA TYPE STRING,
AGNUM TYPE STRING,
AGNAM TYPE STRING,
BERUF TYPE STRING,
EMPSC TYPE STRING,
ANNA1 TYPE STRING,
ANVN1 TYPE STRING,
ANVV1 TYPE STRING,
ANTX1 TYPE STRING,
VMKZ1 TYPE STRING,
ANEX1 TYPE STRING,
ANNA2 TYPE STRING,
ANVN2 TYPE STRING,
ANVV2 TYPE STRING,
ANTX2 TYPE STRING,
VMKZ2 TYPE STRING,
ANEX2 TYPE STRING,
/ISHFR/BIRTHRK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPAT_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_RNPAT_STR-MANDT sy-vline 
WA_RNPAT_STR-EINRI sy-vline 
WA_RNPAT_STR-NNAME sy-vline 
WA_RNPAT_STR-VNAME sy-vline 
WA_RNPAT_STR-GBNAM sy-vline 
WA_RNPAT_STR-GBDAT sy-vline 
WA_RNPAT_STR-GSCHL sy-vline 
WA_RNPAT_STR-GSCHLE sy-vline 
WA_RNPAT_STR-GSCHLTXT sy-vline 
WA_RNPAT_STR-ANREX sy-vline 
WA_RNPAT_STR-TITEL sy-vline 
WA_RNPAT_STR-NAMZU sy-vline 
WA_RNPAT_STR-VORSW sy-vline 
WA_RNPAT_STR-NAME2 sy-vline 
WA_RNPAT_STR-NATIO sy-vline 
WA_RNPAT_STR-NATXT sy-vline 
WA_RNPAT_STR-RESID sy-vline 
WA_RNPAT_STR-UNKNOWN_GBDAT sy-vline 
WA_RNPAT_STR-SPRAS sy-vline 
WA_RNPAT_STR-SPTXT sy-vline 
WA_RNPAT_STR-GLAND sy-vline 
WA_RNPAT_STR-GLANT sy-vline 
WA_RNPAT_STR-GBORT sy-vline 
WA_RNPAT_STR-FAMST sy-vline 
WA_RNPAT_STR-SPRSL sy-vline 
WA_RNPAT_STR-FATXT sy-vline 
WA_RNPAT_STR-KONFE sy-vline 
WA_RNPAT_STR-KOTXT sy-vline 
WA_RNPAT_STR-KTEXT sy-vline 
WA_RNPAT_STR-KZTXT sy-vline 
WA_RNPAT_STR-LGTXT sy-vline 
WA_RNPAT_STR-EXTNR sy-vline 
WA_RNPAT_STR-RVNUM sy-vline 
WA_RNPAT_STR-PASSTY sy-vline 
WA_RNPAT_STR-PASSTX sy-vline 
WA_RNPAT_STR-PASSNR sy-vline 
WA_RNPAT_STR-PFARR sy-vline 
WA_RNPAT_STR-PFTXT sy-vline 
WA_RNPAT_STR-RACE sy-vline 
WA_RNPAT_STR-RACETXT sy-vline 
WA_RNPAT_STR-INSID sy-vline 
WA_RNPAT_STR-ISTAT_BPL sy-vline 
WA_RNPAT_STR-ISTAT_BPLTXT sy-vline 
WA_RNPAT_STR-TAXNUM sy-vline 
WA_RNPAT_STR-TAXNUM_IND sy-vline 
WA_RNPAT_STR-STP sy-vline 
WA_RNPAT_STR-STP_ENDDT sy-vline 
WA_RNPAT_STR-SPEND sy-vline 
WA_RNPAT_STR-SPENT sy-vline 
WA_RNPAT_STR-SPELT sy-vline 
WA_RNPAT_STR-VIPKZ sy-vline 
WA_RNPAT_STR-NOTAN sy-vline 
WA_RNPAT_STR-KRZAN sy-vline 
WA_RNPAT_STR-PFORT sy-vline 
WA_RNPAT_STR-PFAKZ sy-vline 
WA_RNPAT_STR-RISKF sy-vline 
WA_RNPAT_STR-TODKZ sy-vline 
WA_RNPAT_STR-INACT sy-vline 
WA_RNPAT_STR-CONS_PERSDATA sy-vline 
WA_RNPAT_STR-AGNUM sy-vline 
WA_RNPAT_STR-AGNAM sy-vline 
WA_RNPAT_STR-BERUF sy-vline 
WA_RNPAT_STR-EMPSC sy-vline 
WA_RNPAT_STR-ANNA1 sy-vline 
WA_RNPAT_STR-ANVN1 sy-vline 
WA_RNPAT_STR-ANVV1 sy-vline 
WA_RNPAT_STR-ANTX1 sy-vline 
WA_RNPAT_STR-VMKZ1 sy-vline 
WA_RNPAT_STR-ANEX1 sy-vline 
WA_RNPAT_STR-ANNA2 sy-vline 
WA_RNPAT_STR-ANVN2 sy-vline 
WA_RNPAT_STR-ANVV2 sy-vline 
WA_RNPAT_STR-ANTX2 sy-vline 
WA_RNPAT_STR-VMKZ2 sy-vline 
WA_RNPAT_STR-ANEX2 sy-vline 
WA_RNPAT_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.