ABAP Select data from SAP table OI001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OI001 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 OI001. 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 OI001 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_OI001 TYPE STANDARD TABLE OF OI001,
      WA_OI001 TYPE OI001,
      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: <OI001> TYPE OI001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OI001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OI001
  INTO TABLE IT_OI001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OI001
*  INTO TABLE @DATA(IT_OI0012).
*--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_OI001 INDEX 1 INTO DATA(WA_OI0012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OI001 ASSIGNING <OI001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OI001>-MANDT = 1.
<OI001>-BUKRS = 1.
<OI001>-EDBAL = 1.
<OI001>-EDBALM = 1.
<OI001>-COREV = 1.

ENDLOOP.

LOOP AT IT_OI001 INTO WA_OI001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OI001-EDVDEFAULT, sy-vline,
  WA_OI001-TAXDIF, sy-vline,
  WA_OI001-REBDFLTSTA, sy-vline,
  WA_OI001-INEXSD, sy-vline,
  WA_OI001-INEXPO, sy-vline,
  WA_OI001-UPEPI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OI001 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_OI001 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_OI001 INTO WA_OI001.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_OI001_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
EDBAL TYPE STRING,
EDBALM TYPE STRING,
COREV TYPE STRING,
EDVDEFAULT TYPE STRING,
TAXDIF TYPE STRING,
REBDFLTSTA TYPE STRING,
INEXSD TYPE STRING,
INEXPO TYPE STRING,
UPEPI TYPE STRING,
EDMSG TYPE STRING,
LICTP TYPE STRING,
TRANSF TYPE STRING,
NUMKR TYPE STRING,
PROCH TYPE STRING,
PROHT TYPE STRING,
TDP_FIELDS TYPE STRING,
XSTDT TYPE STRING,
COREV_NEW TYPE STRING,
COREV_NEW_NUMKR TYPE STRING,
GLVOR TYPE STRING,
XEINK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OI001_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_OI001_STR-MANDT sy-vline 
WA_OI001_STR-BUKRS sy-vline 
WA_OI001_STR-EDBAL sy-vline 
WA_OI001_STR-EDBALM sy-vline 
WA_OI001_STR-COREV sy-vline 
WA_OI001_STR-EDVDEFAULT sy-vline 
WA_OI001_STR-TAXDIF sy-vline 
WA_OI001_STR-REBDFLTSTA sy-vline 
WA_OI001_STR-INEXSD sy-vline 
WA_OI001_STR-INEXPO sy-vline 
WA_OI001_STR-UPEPI sy-vline 
WA_OI001_STR-EDMSG sy-vline 
WA_OI001_STR-LICTP sy-vline 
WA_OI001_STR-TRANSF sy-vline 
WA_OI001_STR-NUMKR sy-vline 
WA_OI001_STR-PROCH sy-vline 
WA_OI001_STR-PROHT sy-vline 
WA_OI001_STR-TDP_FIELDS sy-vline 
WA_OI001_STR-XSTDT sy-vline 
WA_OI001_STR-COREV_NEW sy-vline 
WA_OI001_STR-COREV_NEW_NUMKR sy-vline 
WA_OI001_STR-GLVOR sy-vline 
WA_OI001_STR-XEINK sy-vline      INTO ld_text SEPARATED BY SPACE.

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