ABAP Select data from SAP table RN2LOP07_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2LOP07_S 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 RN2LOP07_S. 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 RN2LOP07_S 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_RN2LOP07_S TYPE STANDARD TABLE OF RN2LOP07_S,
      WA_RN2LOP07_S TYPE RN2LOP07_S,
      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: <RN2LOP07_S> TYPE RN2LOP07_S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2LOP07_S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2LOP07_S
  INTO TABLE IT_RN2LOP07_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2LOP07_S
*  INTO TABLE @DATA(IT_RN2LOP07_S2).
*--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_RN2LOP07_S INDEX 1 INTO DATA(WA_RN2LOP07_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2LOP07_S ASSIGNING <RN2LOP07_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2LOP07_S>-TAB_ZEILE = 1.
<RN2LOP07_S>-HIERID = 1.
<RN2LOP07_S>-NODE = 1.
<RN2LOP07_S>-PNODE = 1.
<RN2LOP07_S>-NTEXT = 1.

ENDLOOP.

LOOP AT IT_RN2LOP07_S INTO WA_RN2LOP07_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2LOP07_S-WERKS, sy-vline,
  WA_RN2LOP07_S-MATNR, sy-vline,
  WA_RN2LOP07_S-MATKL, sy-vline,
  WA_RN2LOP07_S-KATID, sy-vline,
  WA_RN2LOP07_S-KATYP, sy-vline,
  WA_RN2LOP07_S-VMENG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2LOP07_S 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_RN2LOP07_S 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_RN2LOP07_S INTO WA_RN2LOP07_S.


*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 HIERID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LOP07_S-HIERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LOP07_S-HIERID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LOP07_S-NODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LOP07_S-NODE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PNODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LOP07_S-PNODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LOP07_S-PNODE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RN2LOP07_S-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LOP07_S-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KATID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LOP07_S-KATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LOP07_S-KATID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN2LOP07_S-VMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LOP07_S-VMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN2LOP07_S-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LOP07_S-MEINS.
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_RN2LOP07_S_STR, 
TAB_ZEILE TYPE STRING,
HIERID TYPE STRING,
NODE TYPE STRING,
PNODE TYPE STRING,
NTEXT TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
KATID TYPE STRING,
KATYP TYPE STRING,
VMENG TYPE STRING,
VMEIN TYPE STRING,
MDTXT TYPE STRING,
GEART TYPE STRING,
POSNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
MELDUNG TYPE STRING,
MTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2LOP07_S_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_RN2LOP07_S_STR-TAB_ZEILE sy-vline 
WA_RN2LOP07_S_STR-HIERID sy-vline 
WA_RN2LOP07_S_STR-NODE sy-vline 
WA_RN2LOP07_S_STR-PNODE sy-vline 
WA_RN2LOP07_S_STR-NTEXT sy-vline 
WA_RN2LOP07_S_STR-WERKS sy-vline 
WA_RN2LOP07_S_STR-MATNR sy-vline 
WA_RN2LOP07_S_STR-MATKL sy-vline 
WA_RN2LOP07_S_STR-KATID sy-vline 
WA_RN2LOP07_S_STR-KATYP sy-vline 
WA_RN2LOP07_S_STR-VMENG sy-vline 
WA_RN2LOP07_S_STR-VMEIN sy-vline 
WA_RN2LOP07_S_STR-MDTXT sy-vline 
WA_RN2LOP07_S_STR-GEART sy-vline 
WA_RN2LOP07_S_STR-POSNR sy-vline 
WA_RN2LOP07_S_STR-MENGE sy-vline 
WA_RN2LOP07_S_STR-MEINS sy-vline 
WA_RN2LOP07_S_STR-MELDUNG sy-vline 
WA_RN2LOP07_S_STR-MTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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