ABAP Select data from SAP table ROIJNMHEAD_IO into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJNMHEAD_IO
*  INTO TABLE @DATA(IT_ROIJNMHEAD_IO2).
*--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_ROIJNMHEAD_IO INDEX 1 INTO DATA(WA_ROIJNMHEAD_IO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJNMHEAD_IO>-NMSHTYPE = 1.
<ROIJNMHEAD_IO>-EV_SEQ_UNI = 1.
<ROIJNMHEAD_IO>-EV_GROUP = 1.
<ROIJNMHEAD_IO>-NMWERK = 1.
<ROIJNMHEAD_IO>-NMLGORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJNMHEAD_IO-NMTPLST, sy-vline,
  WA_ROIJNMHEAD_IO-NMVEHICLE, sy-vline,
  WA_ROIJNMHEAD_IO-NMVESSEL, sy-vline,
  WA_ROIJNMHEAD_IO-NMBLOCK, sy-vline,
  WA_ROIJNMHEAD_IO-NMBALCH, sy-vline,
  WA_ROIJNMHEAD_IO-ITEMS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJNMHEAD_IO 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_ROIJNMHEAD_IO 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_ROIJNMHEAD_IO INTO WA_ROIJNMHEAD_IO.


*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 NMVEHICLE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNMHEAD_IO-NMVEHICLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNMHEAD_IO-NMVEHICLE.
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_ROIJNMHEAD_IO_STR, 
NMSHTYPE TYPE STRING,
EV_SEQ_UNI TYPE STRING,
EV_GROUP TYPE STRING,
NMWERK TYPE STRING,
NMLGORT TYPE STRING,
NMTPLST TYPE STRING,
NMVEHICLE TYPE STRING,
NMVESSEL TYPE STRING,
NMBLOCK TYPE STRING,
NMBALCH TYPE STRING,
ITEMS TYPE STRING,
COUNTER1 TYPE STRING,
COUNTER2 TYPE STRING,
COUNTER3 TYPE STRING,
COUNTER4 TYPE STRING,
COUNTER5 TYPE STRING,
COUNTER6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJNMHEAD_IO_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_ROIJNMHEAD_IO_STR-NMSHTYPE sy-vline 
WA_ROIJNMHEAD_IO_STR-EV_SEQ_UNI sy-vline 
WA_ROIJNMHEAD_IO_STR-EV_GROUP sy-vline 
WA_ROIJNMHEAD_IO_STR-NMWERK sy-vline 
WA_ROIJNMHEAD_IO_STR-NMLGORT sy-vline 
WA_ROIJNMHEAD_IO_STR-NMTPLST sy-vline 
WA_ROIJNMHEAD_IO_STR-NMVEHICLE sy-vline 
WA_ROIJNMHEAD_IO_STR-NMVESSEL sy-vline 
WA_ROIJNMHEAD_IO_STR-NMBLOCK sy-vline 
WA_ROIJNMHEAD_IO_STR-NMBALCH sy-vline 
WA_ROIJNMHEAD_IO_STR-ITEMS sy-vline 
WA_ROIJNMHEAD_IO_STR-COUNTER1 sy-vline 
WA_ROIJNMHEAD_IO_STR-COUNTER2 sy-vline 
WA_ROIJNMHEAD_IO_STR-COUNTER3 sy-vline 
WA_ROIJNMHEAD_IO_STR-COUNTER4 sy-vline 
WA_ROIJNMHEAD_IO_STR-COUNTER5 sy-vline 
WA_ROIJNMHEAD_IO_STR-COUNTER6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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