ABAP Select data from SAP table OIKTTDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIKTTDS
*  INTO TABLE @DATA(IT_OIKTTDS2).
*--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_OIKTTDS INDEX 1 INTO DATA(WA_OIKTTDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIKTTDS>-MANDT = 1.
<OIKTTDS>-TPLST = 1.
<OIKTTDS>-TPSCON = 1.
<OIKTTDS>-SHTYP = 1.
<OIKTTDS>-TPSTSO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIKTTDS-TPSTSD, sy-vline,
  WA_OIKTTDS-TPSTDC, sy-vline,
  WA_OIKTTDS-UOMVOL, sy-vline,
  WA_OIKTTDS-UOMMAS, sy-vline,
  WA_OIKTTDS-UOMLEN, sy-vline,
  WA_OIKTTDS-UOMVFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIKTTDS 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_OIKTTDS 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_OIKTTDS INTO WA_OIKTTDS.


*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 UOMVOL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIKTTDS-UOMVOL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIKTTDS-UOMVOL.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field UOMDIS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIKTTDS-UOMDIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIKTTDS-UOMDIS.
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_OIKTTDS_STR, 
MANDT TYPE STRING,
TPLST TYPE STRING,
TPSCON TYPE STRING,
SHTYP TYPE STRING,
TPSTSO TYPE STRING,
TPSTSD TYPE STRING,
TPSTDC TYPE STRING,
UOMVOL TYPE STRING,
UOMMAS TYPE STRING,
UOMLEN TYPE STRING,
UOMVFR TYPE STRING,
UOMMFR TYPE STRING,
UOMTIM TYPE STRING,
UOMTMP TYPE STRING,
UOMDIS TYPE STRING,
DLOCTP TYPE STRING,
DABTNR TYPE STRING,
DPARFN TYPE STRING,
IFWAIT TYPE STRING,
IFRTRY TYPE STRING,
KSCHL_O TYPE STRING,
DR_VEH TYPE STRING,
EXT_NUM TYPE STRING,
OIK_EQ_A TYPE STRING,
MAX_STAT TYPE STRING,
MANETA TYPE STRING,
DEFTRIP TYPE STRING,
DISPSUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIKTTDS_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_OIKTTDS_STR-MANDT sy-vline 
WA_OIKTTDS_STR-TPLST sy-vline 
WA_OIKTTDS_STR-TPSCON sy-vline 
WA_OIKTTDS_STR-SHTYP sy-vline 
WA_OIKTTDS_STR-TPSTSO sy-vline 
WA_OIKTTDS_STR-TPSTSD sy-vline 
WA_OIKTTDS_STR-TPSTDC sy-vline 
WA_OIKTTDS_STR-UOMVOL sy-vline 
WA_OIKTTDS_STR-UOMMAS sy-vline 
WA_OIKTTDS_STR-UOMLEN sy-vline 
WA_OIKTTDS_STR-UOMVFR sy-vline 
WA_OIKTTDS_STR-UOMMFR sy-vline 
WA_OIKTTDS_STR-UOMTIM sy-vline 
WA_OIKTTDS_STR-UOMTMP sy-vline 
WA_OIKTTDS_STR-UOMDIS sy-vline 
WA_OIKTTDS_STR-DLOCTP sy-vline 
WA_OIKTTDS_STR-DABTNR sy-vline 
WA_OIKTTDS_STR-DPARFN sy-vline 
WA_OIKTTDS_STR-IFWAIT sy-vline 
WA_OIKTTDS_STR-IFRTRY sy-vline 
WA_OIKTTDS_STR-KSCHL_O sy-vline 
WA_OIKTTDS_STR-DR_VEH sy-vline 
WA_OIKTTDS_STR-EXT_NUM sy-vline 
WA_OIKTTDS_STR-OIK_EQ_A sy-vline 
WA_OIKTTDS_STR-MAX_STAT sy-vline 
WA_OIKTTDS_STR-MANETA sy-vline 
WA_OIKTTDS_STR-DEFTRIP sy-vline 
WA_OIKTTDS_STR-DISPSUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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