ABAP Select data from SAP table ROIJ_NOMLTO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJ_NOMLTO
*  INTO TABLE @DATA(IT_ROIJ_NOMLTO2).
*--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_ROIJ_NOMLTO INDEX 1 INTO DATA(WA_ROIJ_NOMLTO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJ_NOMLTO>-MANDT = 1.
<ROIJ_NOMLTO>-PEGID = 1.
<ROIJ_NOMLTO>-VBELN = 1.
<ROIJ_NOMLTO>-VBTYP = 1.
<ROIJ_NOMLTO>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJ_NOMLTO-LT_POT, sy-vline,
  WA_ROIJ_NOMLTO-LT_ACT, sy-vline,
  WA_ROIJ_NOMLTO-LT_ALLOWED, sy-vline,
  WA_ROIJ_NOMLTO-LAY_UOM, sy-vline,
  WA_ROIJ_NOMLTO-DM_POT, sy-vline,
  WA_ROIJ_NOMLTO-DM_CURR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJ_NOMLTO 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_ROIJ_NOMLTO 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_ROIJ_NOMLTO INTO WA_ROIJ_NOMLTO.


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

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

*Conversion exit CUNIT, internal->external for field LAY_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIJ_NOMLTO-LAY_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_NOMLTO-LAY_UOM.
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_ROIJ_NOMLTO_STR, 
MANDT TYPE STRING,
PEGID TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
POSNR TYPE STRING,
LT_POT TYPE STRING,
LT_ACT TYPE STRING,
LT_ALLOWED TYPE STRING,
LAY_UOM TYPE STRING,
DM_POT TYPE STRING,
DM_CURR TYPE STRING,
CALCMETHLT TYPE STRING,
CALCMETHDM TYPE STRING,
DMDAT TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
AENAM TYPE STRING,
BLOIND TYPE STRING,
DELIND TYPE STRING,
TKTSELECT TYPE STRING,
LOCID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJ_NOMLTO_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_ROIJ_NOMLTO_STR-MANDT sy-vline 
WA_ROIJ_NOMLTO_STR-PEGID sy-vline 
WA_ROIJ_NOMLTO_STR-VBELN sy-vline 
WA_ROIJ_NOMLTO_STR-VBTYP sy-vline 
WA_ROIJ_NOMLTO_STR-POSNR sy-vline 
WA_ROIJ_NOMLTO_STR-LT_POT sy-vline 
WA_ROIJ_NOMLTO_STR-LT_ACT sy-vline 
WA_ROIJ_NOMLTO_STR-LT_ALLOWED sy-vline 
WA_ROIJ_NOMLTO_STR-LAY_UOM sy-vline 
WA_ROIJ_NOMLTO_STR-DM_POT sy-vline 
WA_ROIJ_NOMLTO_STR-DM_CURR sy-vline 
WA_ROIJ_NOMLTO_STR-CALCMETHLT sy-vline 
WA_ROIJ_NOMLTO_STR-CALCMETHDM sy-vline 
WA_ROIJ_NOMLTO_STR-DMDAT sy-vline 
WA_ROIJ_NOMLTO_STR-ERDAT sy-vline 
WA_ROIJ_NOMLTO_STR-ERZEIT sy-vline 
WA_ROIJ_NOMLTO_STR-ERNAM sy-vline 
WA_ROIJ_NOMLTO_STR-AEDAT sy-vline 
WA_ROIJ_NOMLTO_STR-AEZEIT sy-vline 
WA_ROIJ_NOMLTO_STR-AENAM sy-vline 
WA_ROIJ_NOMLTO_STR-BLOIND sy-vline 
WA_ROIJ_NOMLTO_STR-DELIND sy-vline 
WA_ROIJ_NOMLTO_STR-TKTSELECT sy-vline 
WA_ROIJ_NOMLTO_STR-LOCID sy-vline      INTO ld_text SEPARATED BY SPACE.

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