ABAP Select data from SAP table RNF62 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNF62 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 RNF62. 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 RNF62 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_RNF62 TYPE STANDARD TABLE OF RNF62,
      WA_RNF62 TYPE RNF62,
      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: <RNF62> TYPE RNF62.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNF62.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNF62
  INTO TABLE IT_RNF62.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNF62
*  INTO TABLE @DATA(IT_RNF622).
*--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_RNF62 INDEX 1 INTO DATA(WA_RNF622).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNF62 ASSIGNING <RNF62>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNF62>-LNRIC = 1.
<RNF62>-LFDBEW = 1.
<RNF62>-ICPMK = 1.
<RNF62>-ICPML = 1.
<RNF62>-ICPHC = 1.

ENDLOOP.

LOOP AT IT_RNF62 INTO WA_RNF62.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNF62-ANZOP, sy-vline,
  WA_RNF62-BGDOP, sy-vline,
  WA_RNF62-BZTOP, sy-vline,
  WA_RNF62-EZTOP, sy-vline,
  WA_RNF62-LSLOK, sy-vline,
  WA_RNF62-IDENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNF62 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_RNF62 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_RNF62 INTO WA_RNF62.


*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 LNRIC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-LNRIC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-LNRIC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICPMK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ICPMK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ICPMK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICPML
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ICPML
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ICPML.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LSLOK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-LSLOK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-LSLOK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IDENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-IDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-IDENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-OPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-OPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ICORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ICORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICFAKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ICFAKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ICFAKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ICORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ICORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICPML_REF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ICPML_REF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ICPML_REF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTGA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF62-ENTGA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF62-ENTGA.
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_RNF62_STR, 
LNRIC TYPE STRING,
LFDBEW TYPE STRING,
ICPMK TYPE STRING,
ICPML TYPE STRING,
ICPHC TYPE STRING,
ANZOP TYPE STRING,
BGDOP TYPE STRING,
BZTOP TYPE STRING,
EZTOP TYPE STRING,
LSLOK TYPE STRING,
IDENT TYPE STRING,
OPART TYPE STRING,
BTEXT TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
ENDOP TYPE STRING,
ICPKT TYPE STRING,
ICPLT TYPE STRING,
ICBWIDT TYPE STRING,
ICBWIZT TYPE STRING,
ICBWART TYPE STRING,
ICBWATX TYPE STRING,
ICORGFA TYPE STRING,
ICFAKEY TYPE STRING,
ICORGPF TYPE STRING,
DRG_SEQNO TYPE STRING,
DRG_CATEGORY TYPE STRING,
DRG_RELEVANT TYPE STRING,
PRTYP TYPE STRING,
ICPML_REF TYPE STRING,
ENTGA TYPE STRING,
DRG_IMPACT TYPE STRING,
CCL TYPE STRING,
OPLEBSPEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNF62_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_RNF62_STR-LNRIC sy-vline 
WA_RNF62_STR-LFDBEW sy-vline 
WA_RNF62_STR-ICPMK sy-vline 
WA_RNF62_STR-ICPML sy-vline 
WA_RNF62_STR-ICPHC sy-vline 
WA_RNF62_STR-ANZOP sy-vline 
WA_RNF62_STR-BGDOP sy-vline 
WA_RNF62_STR-BZTOP sy-vline 
WA_RNF62_STR-EZTOP sy-vline 
WA_RNF62_STR-LSLOK sy-vline 
WA_RNF62_STR-IDENT sy-vline 
WA_RNF62_STR-OPART sy-vline 
WA_RNF62_STR-BTEXT sy-vline 
WA_RNF62_STR-ORGFA sy-vline 
WA_RNF62_STR-ORGPF sy-vline 
WA_RNF62_STR-ENDOP sy-vline 
WA_RNF62_STR-ICPKT sy-vline 
WA_RNF62_STR-ICPLT sy-vline 
WA_RNF62_STR-ICBWIDT sy-vline 
WA_RNF62_STR-ICBWIZT sy-vline 
WA_RNF62_STR-ICBWART sy-vline 
WA_RNF62_STR-ICBWATX sy-vline 
WA_RNF62_STR-ICORGFA sy-vline 
WA_RNF62_STR-ICFAKEY sy-vline 
WA_RNF62_STR-ICORGPF sy-vline 
WA_RNF62_STR-DRG_SEQNO sy-vline 
WA_RNF62_STR-DRG_CATEGORY sy-vline 
WA_RNF62_STR-DRG_RELEVANT sy-vline 
WA_RNF62_STR-PRTYP sy-vline 
WA_RNF62_STR-ICPML_REF sy-vline 
WA_RNF62_STR-ENTGA sy-vline 
WA_RNF62_STR-DRG_IMPACT sy-vline 
WA_RNF62_STR-CCL sy-vline 
WA_RNF62_STR-OPLEBSPEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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