ABAP Select data from SAP table DTADUSIAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADUSIAT
*  INTO TABLE @DATA(IT_DTADUSIAT2).
*--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_DTADUSIAT INDEX 1 INTO DATA(WA_DTADUSIAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADUSIAT>-IAT1 = 1.
<DTADUSIAT>-IAT2 = 1.
<DTADUSIAT>-IAT3 = 1.
<DTADUSIAT>-IAT4 = 1.
<DTADUSIAT>-IAT5 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADUSIAT-IAT6, sy-vline,
  WA_DTADUSIAT-IAT7, sy-vline,
  WA_DTADUSIAT-IAT8, sy-vline,
  WA_DTADUSIAT-IAT9, sy-vline,
  WA_DTADUSIAT-IAT10, sy-vline,
  WA_DTADUSIAT-IAT11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADUSIAT 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_DTADUSIAT 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_DTADUSIAT INTO WA_DTADUSIAT.


*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_DTADUSIAT_STR, 
IAT1 TYPE STRING,
IAT2 TYPE STRING,
IAT3 TYPE STRING,
IAT4 TYPE STRING,
IAT5 TYPE STRING,
IAT6 TYPE STRING,
IAT7 TYPE STRING,
IAT8 TYPE STRING,
IAT9 TYPE STRING,
IAT10 TYPE STRING,
IAT11 TYPE STRING,
IAT12 TYPE STRING,
IAT13 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADUSIAT_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_DTADUSIAT_STR-IAT1 sy-vline 
WA_DTADUSIAT_STR-IAT2 sy-vline 
WA_DTADUSIAT_STR-IAT3 sy-vline 
WA_DTADUSIAT_STR-IAT4 sy-vline 
WA_DTADUSIAT_STR-IAT5 sy-vline 
WA_DTADUSIAT_STR-IAT6 sy-vline 
WA_DTADUSIAT_STR-IAT7 sy-vline 
WA_DTADUSIAT_STR-IAT8 sy-vline 
WA_DTADUSIAT_STR-IAT9 sy-vline 
WA_DTADUSIAT_STR-IAT10 sy-vline 
WA_DTADUSIAT_STR-IAT11 sy-vline 
WA_DTADUSIAT_STR-IAT12 sy-vline 
WA_DTADUSIAT_STR-IAT13 sy-vline      INTO ld_text SEPARATED BY SPACE.

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