ABAP Select data from SAP table RN1MLZUOUT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1MLZUOUT 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 RN1MLZUOUT. 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 RN1MLZUOUT 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_RN1MLZUOUT TYPE STANDARD TABLE OF RN1MLZUOUT,
      WA_RN1MLZUOUT TYPE RN1MLZUOUT,
      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: <RN1MLZUOUT> TYPE RN1MLZUOUT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1MLZUOUT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1MLZUOUT
  INTO TABLE IT_RN1MLZUOUT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1MLZUOUT
*  INTO TABLE @DATA(IT_RN1MLZUOUT2).
*--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_RN1MLZUOUT INDEX 1 INTO DATA(WA_RN1MLZUOUT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1MLZUOUT ASSIGNING <RN1MLZUOUT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1MLZUOUT>-EINRI = 1.
<RN1MLZUOUT>-ORGID = 1.
<RN1MLZUOUT>-HIRID = 1.
<RN1MLZUOUT>-LEIST = 1.
<RN1MLZUOUT>-SATYP = 1.

ENDLOOP.

LOOP AT IT_RN1MLZUOUT INTO WA_RN1MLZUOUT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1MLZUOUT-FOLDA, sy-vline,
  WA_RN1MLZUOUT-OFFEN, sy-vline,
  WA_RN1MLZUOUT-LFDNT, sy-vline,
  WA_RN1MLZUOUT-LFDNA, sy-vline,
  WA_RN1MLZUOUT-LFDNB, sy-vline,
  WA_RN1MLZUOUT-EBENE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1MLZUOUT 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_RN1MLZUOUT 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_RN1MLZUOUT INTO WA_RN1MLZUOUT.


*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_RN1MLZUOUT-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1MLZUOUT-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HIRID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1MLZUOUT-HIRID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-HIRID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEIST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1MLZUOUT-LEIST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-LEIST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNOPK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1MLZUOUT-KNOPK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-KNOPK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PAREN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1MLZUOUT-PAREN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-PAREN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RN1MLZUOUT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1MLZUOUT-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1MLZUOUT-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_RN1MLZUOUT_STR, 
EINRI TYPE STRING,
ORGID TYPE STRING,
HIRID TYPE STRING,
LEIST TYPE STRING,
SATYP TYPE STRING,
FOLDA TYPE STRING,
OFFEN TYPE STRING,
LFDNT TYPE STRING,
LFDNA TYPE STRING,
LFDNB TYPE STRING,
EBENE TYPE STRING,
KNOPK TYPE STRING,
PAREN TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
LSTXT TYPE STRING,
KNTXT TYPE STRING,
MATXT TYPE STRING,
ZEIGE TYPE STRING,
SAVKZ TYPE STRING,
CKBOX TYPE STRING,
ZEILE TYPE STRING,
SPALT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1MLZUOUT_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_RN1MLZUOUT_STR-EINRI sy-vline 
WA_RN1MLZUOUT_STR-ORGID sy-vline 
WA_RN1MLZUOUT_STR-HIRID sy-vline 
WA_RN1MLZUOUT_STR-LEIST sy-vline 
WA_RN1MLZUOUT_STR-SATYP sy-vline 
WA_RN1MLZUOUT_STR-FOLDA sy-vline 
WA_RN1MLZUOUT_STR-OFFEN sy-vline 
WA_RN1MLZUOUT_STR-LFDNT sy-vline 
WA_RN1MLZUOUT_STR-LFDNA sy-vline 
WA_RN1MLZUOUT_STR-LFDNB sy-vline 
WA_RN1MLZUOUT_STR-EBENE sy-vline 
WA_RN1MLZUOUT_STR-KNOPK sy-vline 
WA_RN1MLZUOUT_STR-PAREN sy-vline 
WA_RN1MLZUOUT_STR-MATNR sy-vline 
WA_RN1MLZUOUT_STR-WERKS sy-vline 
WA_RN1MLZUOUT_STR-MENGE sy-vline 
WA_RN1MLZUOUT_STR-MEINS sy-vline 
WA_RN1MLZUOUT_STR-LSTXT sy-vline 
WA_RN1MLZUOUT_STR-KNTXT sy-vline 
WA_RN1MLZUOUT_STR-MATXT sy-vline 
WA_RN1MLZUOUT_STR-ZEIGE sy-vline 
WA_RN1MLZUOUT_STR-SAVKZ sy-vline 
WA_RN1MLZUOUT_STR-CKBOX sy-vline 
WA_RN1MLZUOUT_STR-ZEILE sy-vline 
WA_RN1MLZUOUT_STR-SPALT sy-vline      INTO ld_text SEPARATED BY SPACE.

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