ABAP Select data from SAP table ROIJNOMH_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJNOMH_D
*  INTO TABLE @DATA(IT_ROIJNOMH_D2).
*--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_ROIJNOMH_D INDEX 1 INTO DATA(WA_ROIJNOMH_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJNOMH_D>-TSYST = 1.
<ROIJNOMH_D>-NMSHIPPER = 1.
<ROIJNOMH_D>-NMCARRIER = 1.
<ROIJNOMH_D>-CYCLE = 1.
<ROIJNOMH_D>-NMWERK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJNOMH_D-NMLGORT, sy-vline,
  WA_ROIJNOMH_D-NMVEHICLE, sy-vline,
  WA_ROIJNOMH_D-NMVESSEL, sy-vline,
  WA_ROIJNOMH_D-NMTPLST, sy-vline,
  WA_ROIJNOMH_D-ROUTE, sy-vline,
  WA_ROIJNOMH_D-BOOKTS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJNOMH_D 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_ROIJNOMH_D 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_ROIJNOMH_D INTO WA_ROIJNOMH_D.


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

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

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

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNOMH_D-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNOMH_D-UNIT.
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_ROIJNOMH_D_STR, 
TSYST TYPE STRING,
NMSHIPPER TYPE STRING,
NMCARRIER TYPE STRING,
CYCLE TYPE STRING,
NMWERK TYPE STRING,
NMLGORT TYPE STRING,
NMVEHICLE TYPE STRING,
NMVESSEL TYPE STRING,
NMTPLST TYPE STRING,
ROUTE TYPE STRING,
BOOKTS TYPE STRING,
EV_GROUP TYPE STRING,
VKTRA TYPE STRING,
QTYIN TYPE STRING,
QTYOUT TYPE STRING,
UNIT TYPE STRING,
TST_FROM_MIN TYPE STRING,
TST_TO_MAX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJNOMH_D_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_ROIJNOMH_D_STR-TSYST sy-vline 
WA_ROIJNOMH_D_STR-NMSHIPPER sy-vline 
WA_ROIJNOMH_D_STR-NMCARRIER sy-vline 
WA_ROIJNOMH_D_STR-CYCLE sy-vline 
WA_ROIJNOMH_D_STR-NMWERK sy-vline 
WA_ROIJNOMH_D_STR-NMLGORT sy-vline 
WA_ROIJNOMH_D_STR-NMVEHICLE sy-vline 
WA_ROIJNOMH_D_STR-NMVESSEL sy-vline 
WA_ROIJNOMH_D_STR-NMTPLST sy-vline 
WA_ROIJNOMH_D_STR-ROUTE sy-vline 
WA_ROIJNOMH_D_STR-BOOKTS sy-vline 
WA_ROIJNOMH_D_STR-EV_GROUP sy-vline 
WA_ROIJNOMH_D_STR-VKTRA sy-vline 
WA_ROIJNOMH_D_STR-QTYIN sy-vline 
WA_ROIJNOMH_D_STR-QTYOUT sy-vline 
WA_ROIJNOMH_D_STR-UNIT sy-vline 
WA_ROIJNOMH_D_STR-TST_FROM_MIN sy-vline 
WA_ROIJNOMH_D_STR-TST_TO_MAX sy-vline      INTO ld_text SEPARATED BY SPACE.

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