ABAP Select data from SAP table OIFDTT1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIFDTT1 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 OIFDTT1. 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 OIFDTT1 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_OIFDTT1 TYPE STANDARD TABLE OF OIFDTT1,
      WA_OIFDTT1 TYPE OIFDTT1,
      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: <OIFDTT1> TYPE OIFDTT1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIFDTT1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIFDTT1
  INTO TABLE IT_OIFDTT1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIFDTT1
*  INTO TABLE @DATA(IT_OIFDTT12).
*--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_OIFDTT1 INDEX 1 INTO DATA(WA_OIFDTT12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIFDTT1 ASSIGNING <OIFDTT1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIFDTT1>-MANDT = 1.
<OIFDTT1>-TANKTP = 1.
<OIFDTT1>-TCAPAC = 1.
<OIFDTT1>-CMEINS = 1.
<OIFDTT1>-TDIAM = 1.

ENDLOOP.

LOOP AT IT_OIFDTT1 INTO WA_OIFDTT1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIFDTT1-TDIP, sy-vline,
  WA_OIFDTT1-DMEINS, sy-vline,
  WA_OIFDTT1-ERDAT, sy-vline,
  WA_OIFDTT1-ERZEIT, sy-vline,
  WA_OIFDTT1-ERNAM, sy-vline,
  WA_OIFDTT1-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIFDTT1 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_OIFDTT1 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_OIFDTT1 INTO WA_OIFDTT1.


*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 CUNIT, internal->external for field CMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIFDTT1-CMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIFDTT1-CMEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIFDTT1-DMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIFDTT1-DMEINS.
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_OIFDTT1_STR, 
MANDT TYPE STRING,
TANKTP TYPE STRING,
TCAPAC TYPE STRING,
CMEINS TYPE STRING,
TDIAM TYPE STRING,
TDIP TYPE STRING,
DMEINS 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,END OF T_EKKO_STR.
DATA: WA_OIFDTT1_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_OIFDTT1_STR-MANDT sy-vline 
WA_OIFDTT1_STR-TANKTP sy-vline 
WA_OIFDTT1_STR-TCAPAC sy-vline 
WA_OIFDTT1_STR-CMEINS sy-vline 
WA_OIFDTT1_STR-TDIAM sy-vline 
WA_OIFDTT1_STR-TDIP sy-vline 
WA_OIFDTT1_STR-DMEINS sy-vline 
WA_OIFDTT1_STR-ERDAT sy-vline 
WA_OIFDTT1_STR-ERZEIT sy-vline 
WA_OIFDTT1_STR-ERNAM sy-vline 
WA_OIFDTT1_STR-AEDAT sy-vline 
WA_OIFDTT1_STR-AEZEIT sy-vline 
WA_OIFDTT1_STR-AENAM sy-vline 
WA_OIFDTT1_STR-BLOIND sy-vline 
WA_OIFDTT1_STR-DELIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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