ABAP Select data from SAP table DTAUSTCK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTAUSTCK
*  INTO TABLE @DATA(IT_DTAUSTCK2).
*--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_DTAUSTCK INDEX 1 INTO DATA(WA_DTAUSTCK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTAUSTCK>-CK1 = 1.
<DTAUSTCK>-CK2 = 1.
<DTAUSTCK>-CK3 = 1.
<DTAUSTCK>-CK4 = 1.
<DTAUSTCK>-CK5 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTAUSTCK-CK6, sy-vline,
  WA_DTAUSTCK-CK7, sy-vline,
  WA_DTAUSTCK-CK8, sy-vline,
  WA_DTAUSTCK-CK9, sy-vline,
  WA_DTAUSTCK-CK10, sy-vline,
  WA_DTAUSTCK-CK11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTAUSTCK 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_DTAUSTCK 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_DTAUSTCK INTO WA_DTAUSTCK.


*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_DTAUSTCK_STR, 
CK1 TYPE STRING,
CK2 TYPE STRING,
CK3 TYPE STRING,
CK4 TYPE STRING,
CK5 TYPE STRING,
CK6 TYPE STRING,
CK7 TYPE STRING,
CK8 TYPE STRING,
CK9 TYPE STRING,
CK10 TYPE STRING,
CK11 TYPE STRING,
CK12 TYPE STRING,
CK13 TYPE STRING,
CK14 TYPE STRING,
CK15 TYPE STRING,
CK16 TYPE STRING,
CK17 TYPE STRING,
CK18 TYPE STRING,
CK19 TYPE STRING,
CK20 TYPE STRING,
CK21 TYPE STRING,
CK22 TYPE STRING,
CK23 TYPE STRING,
CK24 TYPE STRING,
CK25 TYPE STRING,
CK26 TYPE STRING,
CK27 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTAUSTCK_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_DTAUSTCK_STR-CK1 sy-vline 
WA_DTAUSTCK_STR-CK2 sy-vline 
WA_DTAUSTCK_STR-CK3 sy-vline 
WA_DTAUSTCK_STR-CK4 sy-vline 
WA_DTAUSTCK_STR-CK5 sy-vline 
WA_DTAUSTCK_STR-CK6 sy-vline 
WA_DTAUSTCK_STR-CK7 sy-vline 
WA_DTAUSTCK_STR-CK8 sy-vline 
WA_DTAUSTCK_STR-CK9 sy-vline 
WA_DTAUSTCK_STR-CK10 sy-vline 
WA_DTAUSTCK_STR-CK11 sy-vline 
WA_DTAUSTCK_STR-CK12 sy-vline 
WA_DTAUSTCK_STR-CK13 sy-vline 
WA_DTAUSTCK_STR-CK14 sy-vline 
WA_DTAUSTCK_STR-CK15 sy-vline 
WA_DTAUSTCK_STR-CK16 sy-vline 
WA_DTAUSTCK_STR-CK17 sy-vline 
WA_DTAUSTCK_STR-CK18 sy-vline 
WA_DTAUSTCK_STR-CK19 sy-vline 
WA_DTAUSTCK_STR-CK20 sy-vline 
WA_DTAUSTCK_STR-CK21 sy-vline 
WA_DTAUSTCK_STR-CK22 sy-vline 
WA_DTAUSTCK_STR-CK23 sy-vline 
WA_DTAUSTCK_STR-CK24 sy-vline 
WA_DTAUSTCK_STR-CK25 sy-vline 
WA_DTAUSTCK_STR-CK26 sy-vline 
WA_DTAUSTCK_STR-CK27 sy-vline      INTO ld_text SEPARATED BY SPACE.

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