ABAP Select data from SAP table ROIJWL_UPD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJWL_UPD
*  INTO TABLE @DATA(IT_ROIJWL_UPD2).
*--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_ROIJWL_UPD INDEX 1 INTO DATA(WA_ROIJWL_UPD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJWL_UPD>-MANDT = 1.
<ROIJWL_UPD>-WLITEM = 1.
<ROIJWL_UPD>-WLRC = 1.
<ROIJWL_UPD>-TSYST = 1.
<ROIJWL_UPD>-LOCID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJWL_UPD-MATNR, sy-vline,
  WA_ROIJWL_UPD-NOMNR, sy-vline,
  WA_ROIJWL_UPD-NOMTK, sy-vline,
  WA_ROIJWL_UPD-NOMIT, sy-vline,
  WA_ROIJWL_UPD-PTSYST, sy-vline,
  WA_ROIJWL_UPD-PLOCID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJWL_UPD 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_ROIJWL_UPD 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_ROIJWL_UPD INTO WA_ROIJWL_UPD.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROIJWL_UPD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJWL_UPD-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field TKONN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJWL_UPD-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJWL_UPD-TKONN.
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_ROIJWL_UPD_STR, 
MANDT TYPE STRING,
WLITEM TYPE STRING,
WLRC TYPE STRING,
TSYST TYPE STRING,
LOCID TYPE STRING,
MATNR TYPE STRING,
NOMNR TYPE STRING,
NOMTK TYPE STRING,
NOMIT TYPE STRING,
PTSYST TYPE STRING,
PLOCID TYPE STRING,
DATUM TYPE STRING,
SITYP TYPE STRING,
TKONN TYPE STRING,
TPOSN TYPE STRING,
VBTYP TYPE STRING,
WARN TYPE STRING,
DELET 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,
UPD_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJWL_UPD_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_ROIJWL_UPD_STR-MANDT sy-vline 
WA_ROIJWL_UPD_STR-WLITEM sy-vline 
WA_ROIJWL_UPD_STR-WLRC sy-vline 
WA_ROIJWL_UPD_STR-TSYST sy-vline 
WA_ROIJWL_UPD_STR-LOCID sy-vline 
WA_ROIJWL_UPD_STR-MATNR sy-vline 
WA_ROIJWL_UPD_STR-NOMNR sy-vline 
WA_ROIJWL_UPD_STR-NOMTK sy-vline 
WA_ROIJWL_UPD_STR-NOMIT sy-vline 
WA_ROIJWL_UPD_STR-PTSYST sy-vline 
WA_ROIJWL_UPD_STR-PLOCID sy-vline 
WA_ROIJWL_UPD_STR-DATUM sy-vline 
WA_ROIJWL_UPD_STR-SITYP sy-vline 
WA_ROIJWL_UPD_STR-TKONN sy-vline 
WA_ROIJWL_UPD_STR-TPOSN sy-vline 
WA_ROIJWL_UPD_STR-VBTYP sy-vline 
WA_ROIJWL_UPD_STR-WARN sy-vline 
WA_ROIJWL_UPD_STR-DELET sy-vline 
WA_ROIJWL_UPD_STR-ERDAT sy-vline 
WA_ROIJWL_UPD_STR-ERZEIT sy-vline 
WA_ROIJWL_UPD_STR-ERNAM sy-vline 
WA_ROIJWL_UPD_STR-AEDAT sy-vline 
WA_ROIJWL_UPD_STR-AEZEIT sy-vline 
WA_ROIJWL_UPD_STR-AENAM sy-vline 
WA_ROIJWL_UPD_STR-BLOIND sy-vline 
WA_ROIJWL_UPD_STR-DELIND sy-vline 
WA_ROIJWL_UPD_STR-TKTSELECT sy-vline 
WA_ROIJWL_UPD_STR-UPD_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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