ABAP Select data from SAP table OILSGNBU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OILSGNBU
*  INTO TABLE @DATA(IT_OILSGNBU2).
*--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_OILSGNBU INDEX 1 INTO DATA(WA_OILSGNBU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OILSGNBU>-EBELN = 1.
<OILSGNBU>-EBELP = 1.
<OILSGNBU>-LFBNR = 1.
<OILSGNBU>-LFPOS = 1.
<OILSGNBU>-BWKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OILSGNBU-WWERT, sy-vline,
  WA_OILSGNBU-OICIMAP, sy-vline,
  WA_OILSGNBU-OIWEEDWR, sy-vline,
  WA_OILSGNBU-OINEGPSTG, sy-vline,
  WA_OILSGNBU-OIREEDWR, sy-vline,
  WA_OILSGNBU-OIOPREI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OILSGNBU 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_OILSGNBU 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_OILSGNBU INTO WA_OILSGNBU.


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

*Conversion exit ALPHA, internal->external for field LFBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OILSGNBU-LFBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILSGNBU-LFBNR.
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_OILSGNBU_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
BWKRS TYPE STRING,
WWERT TYPE STRING,
OICIMAP TYPE STRING,
OIWEEDWR TYPE STRING,
OINEGPSTG TYPE STRING,
OIREEDWR TYPE STRING,
OIOPREI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OILSGNBU_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_OILSGNBU_STR-EBELN sy-vline 
WA_OILSGNBU_STR-EBELP sy-vline 
WA_OILSGNBU_STR-LFBNR sy-vline 
WA_OILSGNBU_STR-LFPOS sy-vline 
WA_OILSGNBU_STR-BWKRS sy-vline 
WA_OILSGNBU_STR-WWERT sy-vline 
WA_OILSGNBU_STR-OICIMAP sy-vline 
WA_OILSGNBU_STR-OIWEEDWR sy-vline 
WA_OILSGNBU_STR-OINEGPSTG sy-vline 
WA_OILSGNBU_STR-OIREEDWR sy-vline 
WA_OILSGNBU_STR-OIOPREI sy-vline      INTO ld_text SEPARATED BY SPACE.

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