ABAP Select data from SAP table RN1_EXPORDERH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1_EXPORDERH 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 RN1_EXPORDERH. 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 RN1_EXPORDERH 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_RN1_EXPORDERH TYPE STANDARD TABLE OF RN1_EXPORDERH,
      WA_RN1_EXPORDERH TYPE RN1_EXPORDERH,
      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: <RN1_EXPORDERH> TYPE RN1_EXPORDERH.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1_EXPORDERH.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1_EXPORDERH
  INTO TABLE IT_RN1_EXPORDERH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1_EXPORDERH
*  INTO TABLE @DATA(IT_RN1_EXPORDERH2).
*--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_RN1_EXPORDERH INDEX 1 INTO DATA(WA_RN1_EXPORDERH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1_EXPORDERH ASSIGNING <RN1_EXPORDERH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1_EXPORDERH>-MEORDID = 1.
<RN1_EXPORDERH>-MOTYPID = 1.
<RN1_EXPORDERH>-MOTYPIDDESCR = 1.
<RN1_EXPORDERH>-MOSTX = 1.
<RN1_EXPORDERH>-MOLTX = 1.

ENDLOOP.

LOOP AT IT_RN1_EXPORDERH INTO WA_RN1_EXPORDERH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1_EXPORDERH-MORESP1, sy-vline,
  WA_RN1_EXPORDERH-MORESP1DESCR, sy-vline,
  WA_RN1_EXPORDERH-MEOEXT, sy-vline,
  WA_RN1_EXPORDERH-MEOEXTCC, sy-vline,
  WA_RN1_EXPORDERH-OLDIS, sy-vline,
  WA_RN1_EXPORDERH-OLDIS_VALS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1_EXPORDERH 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_RN1_EXPORDERH 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_RN1_EXPORDERH INTO WA_RN1_EXPORDERH.


*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 MORESP1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_EXPORDERH-MORESP1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_EXPORDERH-MORESP1.
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_RN1_EXPORDERH_STR, 
MEORDID TYPE STRING,
MOTYPID TYPE STRING,
MOTYPIDDESCR TYPE STRING,
MOSTX TYPE STRING,
MOLTX TYPE STRING,
MORESP1 TYPE STRING,
MORESP1DESCR TYPE STRING,
MEOEXT TYPE STRING,
MEOEXTCC TYPE STRING,
OLDIS TYPE STRING,
OLDIS_VALS TYPE STRING,
OLDIS_VAL1 TYPE STRING,
OLDIS_VAL2 TYPE STRING,
ADOUTPAT TYPE STRING,
EXPRESNR TYPE STRING,
USERST TYPE STRING,
MOVDF TYPE STRING,
MOVTF TYPE STRING,
ORDUR TYPE STRING,
ORDURU TYPE STRING,
MOVDT TYPE STRING,
MOVTT TYPE STRING,
PRNCSTX TYPE STRING,
PRNCLTX TYPE STRING,
INSTX TYPE STRING,
INLTX TYPE STRING,
VFCOIND TYPE STRING,
RCUSE TYPE STRING,
RCUSEDESCR TYPE STRING,
MPRESD TYPE STRING,
EXT_DRUGID TYPE STRING,
CATIDBDC TYPE STRING,
GENNAME TYPE STRING,
INPATIENT TYPE STRING,
OUTPATIENT TYPE STRING,
PHFORM TYPE STRING,
PHFORMDESCR TYPE STRING,
APDEV TYPE STRING,
APDEVDESCR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1_EXPORDERH_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_RN1_EXPORDERH_STR-MEORDID sy-vline 
WA_RN1_EXPORDERH_STR-MOTYPID sy-vline 
WA_RN1_EXPORDERH_STR-MOTYPIDDESCR sy-vline 
WA_RN1_EXPORDERH_STR-MOSTX sy-vline 
WA_RN1_EXPORDERH_STR-MOLTX sy-vline 
WA_RN1_EXPORDERH_STR-MORESP1 sy-vline 
WA_RN1_EXPORDERH_STR-MORESP1DESCR sy-vline 
WA_RN1_EXPORDERH_STR-MEOEXT sy-vline 
WA_RN1_EXPORDERH_STR-MEOEXTCC sy-vline 
WA_RN1_EXPORDERH_STR-OLDIS sy-vline 
WA_RN1_EXPORDERH_STR-OLDIS_VALS sy-vline 
WA_RN1_EXPORDERH_STR-OLDIS_VAL1 sy-vline 
WA_RN1_EXPORDERH_STR-OLDIS_VAL2 sy-vline 
WA_RN1_EXPORDERH_STR-ADOUTPAT sy-vline 
WA_RN1_EXPORDERH_STR-EXPRESNR sy-vline 
WA_RN1_EXPORDERH_STR-USERST sy-vline 
WA_RN1_EXPORDERH_STR-MOVDF sy-vline 
WA_RN1_EXPORDERH_STR-MOVTF sy-vline 
WA_RN1_EXPORDERH_STR-ORDUR sy-vline 
WA_RN1_EXPORDERH_STR-ORDURU sy-vline 
WA_RN1_EXPORDERH_STR-MOVDT sy-vline 
WA_RN1_EXPORDERH_STR-MOVTT sy-vline 
WA_RN1_EXPORDERH_STR-PRNCSTX sy-vline 
WA_RN1_EXPORDERH_STR-PRNCLTX sy-vline 
WA_RN1_EXPORDERH_STR-INSTX sy-vline 
WA_RN1_EXPORDERH_STR-INLTX sy-vline 
WA_RN1_EXPORDERH_STR-VFCOIND sy-vline 
WA_RN1_EXPORDERH_STR-RCUSE sy-vline 
WA_RN1_EXPORDERH_STR-RCUSEDESCR sy-vline 
WA_RN1_EXPORDERH_STR-MPRESD sy-vline 
WA_RN1_EXPORDERH_STR-EXT_DRUGID sy-vline 
WA_RN1_EXPORDERH_STR-CATIDBDC sy-vline 
WA_RN1_EXPORDERH_STR-GENNAME sy-vline 
WA_RN1_EXPORDERH_STR-INPATIENT sy-vline 
WA_RN1_EXPORDERH_STR-OUTPATIENT sy-vline 
WA_RN1_EXPORDERH_STR-PHFORM sy-vline 
WA_RN1_EXPORDERH_STR-PHFORMDESCR sy-vline 
WA_RN1_EXPORDERH_STR-APDEV sy-vline 
WA_RN1_EXPORDERH_STR-APDEVDESCR sy-vline      INTO ld_text SEPARATED BY SPACE.

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