ABAP Select data from SAP table ROIJNMI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJNMI
*  INTO TABLE @DATA(IT_ROIJNMI2).
*--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_ROIJNMI INDEX 1 INTO DATA(WA_ROIJNMI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJNMI>-MANDT = 1.
<ROIJNMI>-NOMTK = 1.
<ROIJNMI>-NOMIT = 1.
<ROIJNMI>-LOCID = 1.
<ROIJNMI>-S_MATNR_I = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJNMI-WORKLIST_I, sy-vline,
  WA_ROIJNMI-UPD_FLAG, sy-vline,
  WA_ROIJNMI-IDATE, sy-vline,
  WA_ROIJNMI-ILOCK, sy-vline,
  WA_ROIJNMI-ACTUALS, sy-vline,
  WA_ROIJNMI-ISTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJNMI 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_ROIJNMI 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_ROIJNMI INTO WA_ROIJNMI.


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

*Conversion exit MATN1, internal->external for field S_MATNR_I
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNMI-S_MATNR_I
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNMI-S_MATNR_I.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT_I
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNMI-UNIT_I
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNMI-UNIT_I.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field TCNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNMI-TCNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNMI-TCNUM.
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_ROIJNMI_STR, 
MANDT TYPE STRING,
NOMTK TYPE STRING,
NOMIT TYPE STRING,
LOCID TYPE STRING,
S_MATNR_I TYPE STRING,
WORKLIST_I TYPE STRING,
UPD_FLAG TYPE STRING,
IDATE TYPE STRING,
ILOCK TYPE STRING,
ACTUALS TYPE STRING,
ISTAT TYPE STRING,
ACTUALQTY TYPE STRING,
MENGE TYPE STRING,
UNIT_I TYPE STRING,
ITBUTOLABS TYPE STRING,
UNLIMITED TYPE STRING,
ITBOTOLABS TYPE STRING,
SITYP TYPE STRING,
DOCIND TYPE STRING,
DOCNR TYPE STRING,
DOCITM TYPE STRING,
PARTNR TYPE STRING,
LOCPT TYPE STRING,
LOCSL TYPE STRING,
DELIND TYPE STRING,
ERDAT TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
AENAM TYPE STRING,
UPDATEXDOK TYPE STRING,
INCOMPLETE_FLAG TYPE STRING,
TCNUM TYPE STRING,
TCITM TYPE STRING,
NOMIT_CONS TYPE STRING,
ITIME TYPE STRING,
IDATE_TO TYPE STRING,
ITIME_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJNMI_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_ROIJNMI_STR-MANDT sy-vline 
WA_ROIJNMI_STR-NOMTK sy-vline 
WA_ROIJNMI_STR-NOMIT sy-vline 
WA_ROIJNMI_STR-LOCID sy-vline 
WA_ROIJNMI_STR-S_MATNR_I sy-vline 
WA_ROIJNMI_STR-WORKLIST_I sy-vline 
WA_ROIJNMI_STR-UPD_FLAG sy-vline 
WA_ROIJNMI_STR-IDATE sy-vline 
WA_ROIJNMI_STR-ILOCK sy-vline 
WA_ROIJNMI_STR-ACTUALS sy-vline 
WA_ROIJNMI_STR-ISTAT sy-vline 
WA_ROIJNMI_STR-ACTUALQTY sy-vline 
WA_ROIJNMI_STR-MENGE sy-vline 
WA_ROIJNMI_STR-UNIT_I sy-vline 
WA_ROIJNMI_STR-ITBUTOLABS sy-vline 
WA_ROIJNMI_STR-UNLIMITED sy-vline 
WA_ROIJNMI_STR-ITBOTOLABS sy-vline 
WA_ROIJNMI_STR-SITYP sy-vline 
WA_ROIJNMI_STR-DOCIND sy-vline 
WA_ROIJNMI_STR-DOCNR sy-vline 
WA_ROIJNMI_STR-DOCITM sy-vline 
WA_ROIJNMI_STR-PARTNR sy-vline 
WA_ROIJNMI_STR-LOCPT sy-vline 
WA_ROIJNMI_STR-LOCSL sy-vline 
WA_ROIJNMI_STR-DELIND sy-vline 
WA_ROIJNMI_STR-ERDAT sy-vline 
WA_ROIJNMI_STR-AEDAT sy-vline 
WA_ROIJNMI_STR-AEZEIT sy-vline 
WA_ROIJNMI_STR-AENAM sy-vline 
WA_ROIJNMI_STR-UPDATEXDOK sy-vline 
WA_ROIJNMI_STR-INCOMPLETE_FLAG sy-vline 
WA_ROIJNMI_STR-TCNUM sy-vline 
WA_ROIJNMI_STR-TCITM sy-vline 
WA_ROIJNMI_STR-NOMIT_CONS sy-vline 
WA_ROIJNMI_STR-ITIME sy-vline 
WA_ROIJNMI_STR-IDATE_TO sy-vline 
WA_ROIJNMI_STR-ITIME_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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