ABAP Select data from SAP table IB0023 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IB0023 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 IB0023. 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 IB0023 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_IB0023 TYPE STANDARD TABLE OF IB0023,
      WA_IB0023 TYPE IB0023,
      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: <IB0023> TYPE IB0023.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IB0023.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IB0023
  INTO TABLE IT_IB0023.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IB0023
*  INTO TABLE @DATA(IT_IB00232).
*--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_IB0023 INDEX 1 INTO DATA(WA_IB00232).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IB0023 ASSIGNING <IB0023>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IB0023>-OBJID = 1.
<IB0023>-MANDT = 1.
<IB0023>-KNNUM = 1.
<IB0023>-ADZHL = 1.
<IB0023>-KNNAM = 1.

ENDLOOP.

LOOP AT IT_IB0023 INTO WA_IB0023.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IB0023-KNART, sy-vline,
  WA_IB0023-KNART2, sy-vline,
  WA_IB0023-KNSOFT, sy-vline,
  WA_IB0023-KNVER, sy-vline,
  WA_IB0023-KNVER2, sy-vline,
  WA_IB0023-KNSCE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IB0023 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_IB0023 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_IB0023 INTO WA_IB0023.


*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 AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IB0023-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IB0023-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IB0023-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IB0023-LANGU.
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_IB0023_STR, 
OBJID TYPE STRING,
MANDT TYPE STRING,
KNNUM TYPE STRING,
ADZHL TYPE STRING,
KNNAM TYPE STRING,
KNART TYPE STRING,
KNART2 TYPE STRING,
KNSOFT TYPE STRING,
KNVER TYPE STRING,
KNVER2 TYPE STRING,
KNSCE TYPE STRING,
KNSTA TYPE STRING,
KNEDT TYPE STRING,
KNEUS TYPE STRING,
KNADT TYPE STRING,
KNAUS TYPE STRING,
KNGRP TYPE STRING,
KNBEO TYPE STRING,
LKENZ TYPE STRING,
AENNR TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
CHTIM TYPE STRING,
LANGU TYPE STRING,
KNKTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IB0023_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_IB0023_STR-OBJID sy-vline 
WA_IB0023_STR-MANDT sy-vline 
WA_IB0023_STR-KNNUM sy-vline 
WA_IB0023_STR-ADZHL sy-vline 
WA_IB0023_STR-KNNAM sy-vline 
WA_IB0023_STR-KNART sy-vline 
WA_IB0023_STR-KNART2 sy-vline 
WA_IB0023_STR-KNSOFT sy-vline 
WA_IB0023_STR-KNVER sy-vline 
WA_IB0023_STR-KNVER2 sy-vline 
WA_IB0023_STR-KNSCE sy-vline 
WA_IB0023_STR-KNSTA sy-vline 
WA_IB0023_STR-KNEDT sy-vline 
WA_IB0023_STR-KNEUS sy-vline 
WA_IB0023_STR-KNADT sy-vline 
WA_IB0023_STR-KNAUS sy-vline 
WA_IB0023_STR-KNGRP sy-vline 
WA_IB0023_STR-KNBEO sy-vline 
WA_IB0023_STR-LKENZ sy-vline 
WA_IB0023_STR-AENNR sy-vline 
WA_IB0023_STR-DATUV sy-vline 
WA_IB0023_STR-DATUB sy-vline 
WA_IB0023_STR-CHTIM sy-vline 
WA_IB0023_STR-LANGU sy-vline 
WA_IB0023_STR-KNKTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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