ABAP Select data from SAP table ROIJ_NOMLT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIJ_NOMLT 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_NOMLT. 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_NOMLT 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_NOMLT TYPE STANDARD TABLE OF ROIJ_NOMLT,
      WA_ROIJ_NOMLT TYPE ROIJ_NOMLT,
      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_NOMLT> TYPE ROIJ_NOMLT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJ_NOMLT
*  INTO TABLE @DATA(IT_ROIJ_NOMLT2).
*--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_NOMLT INDEX 1 INTO DATA(WA_ROIJ_NOMLT2).


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

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

ENDLOOP.

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

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


*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_NOMLT-PEGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_NOMLT-PEGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJ_NOMLT-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_NOMLT-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_NOMLT-LAY_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJ_NOMLT-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_NOMLT_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,
UPDATEFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJ_NOMLT_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_NOMLT_STR-MANDT sy-vline 
WA_ROIJ_NOMLT_STR-PEGID sy-vline 
WA_ROIJ_NOMLT_STR-VBELN sy-vline 
WA_ROIJ_NOMLT_STR-VBTYP sy-vline 
WA_ROIJ_NOMLT_STR-POSNR sy-vline 
WA_ROIJ_NOMLT_STR-LT_POT sy-vline 
WA_ROIJ_NOMLT_STR-LT_ACT sy-vline 
WA_ROIJ_NOMLT_STR-LT_ALLOWED sy-vline 
WA_ROIJ_NOMLT_STR-LAY_UOM sy-vline 
WA_ROIJ_NOMLT_STR-DM_POT sy-vline 
WA_ROIJ_NOMLT_STR-DM_CURR sy-vline 
WA_ROIJ_NOMLT_STR-CALCMETHLT sy-vline 
WA_ROIJ_NOMLT_STR-CALCMETHDM sy-vline 
WA_ROIJ_NOMLT_STR-DMDAT sy-vline 
WA_ROIJ_NOMLT_STR-ERDAT sy-vline 
WA_ROIJ_NOMLT_STR-ERZEIT sy-vline 
WA_ROIJ_NOMLT_STR-ERNAM sy-vline 
WA_ROIJ_NOMLT_STR-AEDAT sy-vline 
WA_ROIJ_NOMLT_STR-AEZEIT sy-vline 
WA_ROIJ_NOMLT_STR-AENAM sy-vline 
WA_ROIJ_NOMLT_STR-BLOIND sy-vline 
WA_ROIJ_NOMLT_STR-DELIND sy-vline 
WA_ROIJ_NOMLT_STR-TKTSELECT sy-vline 
WA_ROIJ_NOMLT_STR-UPDATEFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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