ABAP Select data from SAP table ROIJNOMTXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJNOMTXT
*  INTO TABLE @DATA(IT_ROIJNOMTXT2).
*--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_ROIJNOMTXT INDEX 1 INTO DATA(WA_ROIJNOMTXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJNOMTXT>-DEMATNR = 1.
<ROIJNOMTXT>-MATDEFI = 1.
<ROIJNOMTXT>-TANKTXT = 1.
<ROIJNOMTXT>-CONSNTXT = 1.
<ROIJNOMTXT>-LOCPARTTXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJNOMTXT-CTPARTTXT, sy-vline,
  WA_ROIJNOMTXT-INSPETXT, sy-vline,
  WA_ROIJNOMTXT-VENDORTXT, sy-vline,
  WA_ROIJNOMTXT-IMEXPOTXT, sy-vline,
  WA_ROIJNOMTXT-OWNERTXT, sy-vline,
  WA_ROIJNOMTXT-STATUSTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJNOMTXT 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_ROIJNOMTXT 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_ROIJNOMTXT INTO WA_ROIJNOMTXT.


*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 MATN1, internal->external for field DEMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNOMTXT-DEMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNOMTXT-DEMATNR.
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_ROIJNOMTXT_STR, 
DEMATNR TYPE STRING,
MATDEFI TYPE STRING,
TANKTXT TYPE STRING,
CONSNTXT TYPE STRING,
LOCPARTTXT TYPE STRING,
CTPARTTXT TYPE STRING,
INSPETXT TYPE STRING,
VENDORTXT TYPE STRING,
IMEXPOTXT TYPE STRING,
OWNERTXT TYPE STRING,
STATUSTXT TYPE STRING,
MATERTXT TYPE STRING,
LEDLIGHT TYPE STRING,
LEDLIGHT_I TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJNOMTXT_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_ROIJNOMTXT_STR-DEMATNR sy-vline 
WA_ROIJNOMTXT_STR-MATDEFI sy-vline 
WA_ROIJNOMTXT_STR-TANKTXT sy-vline 
WA_ROIJNOMTXT_STR-CONSNTXT sy-vline 
WA_ROIJNOMTXT_STR-LOCPARTTXT sy-vline 
WA_ROIJNOMTXT_STR-CTPARTTXT sy-vline 
WA_ROIJNOMTXT_STR-INSPETXT sy-vline 
WA_ROIJNOMTXT_STR-VENDORTXT sy-vline 
WA_ROIJNOMTXT_STR-IMEXPOTXT sy-vline 
WA_ROIJNOMTXT_STR-OWNERTXT sy-vline 
WA_ROIJNOMTXT_STR-STATUSTXT sy-vline 
WA_ROIJNOMTXT_STR-MATERTXT sy-vline 
WA_ROIJNOMTXT_STR-LEDLIGHT sy-vline 
WA_ROIJNOMTXT_STR-LEDLIGHT_I sy-vline      INTO ld_text SEPARATED BY SPACE.

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