ABAP Select data from SAP table RNCORDER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNCORDER
*  INTO TABLE @DATA(IT_RNCORDER2).
*--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_RNCORDER INDEX 1 INTO DATA(WA_RNCORDER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNCORDER>-APPLK = 1.
<RNCORDER>-EVENT = 1.
<RNCORDER>-EINRI = 1.
<RNCORDER>-PATNR = 1.
<RNCORDER>-FALNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNCORDER-LFDNR, sy-vline,
  WA_RNCORDER-ORGFA, sy-vline,
  WA_RNCORDER-ORGPF, sy-vline,
  WA_RNCORDER-GPART, sy-vline,
  WA_RNCORDER-PRIORPATNR, sy-vline,
  WA_RNCORDER-PRIORPZIFF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNCORDER 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_RNCORDER 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_RNCORDER INTO WA_RNCORDER.


*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_RNCORDER-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNCORDER-EINRI.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNCORDER-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNCORDER-DOKNR.
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_RNCORDER_STR, 
APPLK TYPE STRING,
EVENT TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
GPART TYPE STRING,
PRIORPATNR TYPE STRING,
PRIORPZIFF TYPE STRING,
ANFKEY TYPE STRING,
ORGFA_OLD TYPE STRING,
ORGPF_OLD TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
LFDDOK TYPE STRING,
SUBKEY1 TYPE STRING,
SUBKEY2 TYPE STRING,
SUBKEY3 TYPE STRING,
SUBKEY4 TYPE STRING,
SUBKEY5 TYPE STRING,
SUBKEY6 TYPE STRING,
MEDRECID TYPE STRING,
EXEC_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNCORDER_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_RNCORDER_STR-APPLK sy-vline 
WA_RNCORDER_STR-EVENT sy-vline 
WA_RNCORDER_STR-EINRI sy-vline 
WA_RNCORDER_STR-PATNR sy-vline 
WA_RNCORDER_STR-FALNR sy-vline 
WA_RNCORDER_STR-LFDNR sy-vline 
WA_RNCORDER_STR-ORGFA sy-vline 
WA_RNCORDER_STR-ORGPF sy-vline 
WA_RNCORDER_STR-GPART sy-vline 
WA_RNCORDER_STR-PRIORPATNR sy-vline 
WA_RNCORDER_STR-PRIORPZIFF sy-vline 
WA_RNCORDER_STR-ANFKEY sy-vline 
WA_RNCORDER_STR-ORGFA_OLD sy-vline 
WA_RNCORDER_STR-ORGPF_OLD sy-vline 
WA_RNCORDER_STR-DOKAR sy-vline 
WA_RNCORDER_STR-DOKNR sy-vline 
WA_RNCORDER_STR-DOKVR sy-vline 
WA_RNCORDER_STR-DOKTL sy-vline 
WA_RNCORDER_STR-LFDDOK sy-vline 
WA_RNCORDER_STR-SUBKEY1 sy-vline 
WA_RNCORDER_STR-SUBKEY2 sy-vline 
WA_RNCORDER_STR-SUBKEY3 sy-vline 
WA_RNCORDER_STR-SUBKEY4 sy-vline 
WA_RNCORDER_STR-SUBKEY5 sy-vline 
WA_RNCORDER_STR-SUBKEY6 sy-vline 
WA_RNCORDER_STR-MEDRECID sy-vline 
WA_RNCORDER_STR-EXEC_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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