ABAP Select data from SAP table OIBIA8 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIBIA8 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 OIBIA8. 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 OIBIA8 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_OIBIA8 TYPE STANDARD TABLE OF OIBIA8,
      WA_OIBIA8 TYPE OIBIA8,
      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: <OIBIA8> TYPE OIBIA8.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIBIA8.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIBIA8
  INTO TABLE IT_OIBIA8.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIBIA8
*  INTO TABLE @DATA(IT_OIBIA82).
*--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_OIBIA8 INDEX 1 INTO DATA(WA_OIBIA82).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIBIA8 ASSIGNING <OIBIA8>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIBIA8>-CHGS = 1.
<OIBIA8>-TDICH = 1.
<OIBIA8>-N2RATIO = 1.
<OIBIA8>-CO2RATIO = 1.
<OIBIA8>-H2RATIO = 1.

ENDLOOP.

LOOP AT IT_OIBIA8 INTO WA_OIBIA8.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIBIA8-CORATIO, sy-vline,
  WA_OIBIA8-MTTMP, sy-vline,
  WA_OIBIA8-MTPRES, sy-vline,
  WA_OIBIA8-BSTMP, sy-vline,
  WA_OIBIA8-BPRESV, sy-vline,
  WA_OIBIA8-TSTMP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIBIA8 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_OIBIA8 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_OIBIA8 INTO WA_OIBIA8.


*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_OIBIA8_STR, 
CHGS TYPE STRING,
TDICH TYPE STRING,
N2RATIO TYPE STRING,
CO2RATIO TYPE STRING,
H2RATIO TYPE STRING,
CORATIO TYPE STRING,
MTTMP TYPE STRING,
MTPRES TYPE STRING,
BSTMP TYPE STRING,
BPRESV TYPE STRING,
TSTMP TYPE STRING,
TPRED TYPE STRING,
TSTMPCAL TYPE STRING,
TPREDCAL TYPE STRING,
TTMPHV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIBIA8_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_OIBIA8_STR-CHGS sy-vline 
WA_OIBIA8_STR-TDICH sy-vline 
WA_OIBIA8_STR-N2RATIO sy-vline 
WA_OIBIA8_STR-CO2RATIO sy-vline 
WA_OIBIA8_STR-H2RATIO sy-vline 
WA_OIBIA8_STR-CORATIO sy-vline 
WA_OIBIA8_STR-MTTMP sy-vline 
WA_OIBIA8_STR-MTPRES sy-vline 
WA_OIBIA8_STR-BSTMP sy-vline 
WA_OIBIA8_STR-BPRESV sy-vline 
WA_OIBIA8_STR-TSTMP sy-vline 
WA_OIBIA8_STR-TPRED sy-vline 
WA_OIBIA8_STR-TSTMPCAL sy-vline 
WA_OIBIA8_STR-TPREDCAL sy-vline 
WA_OIBIA8_STR-TTMPHV sy-vline      INTO ld_text SEPARATED BY SPACE.

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