ABAP Select data from SAP table DTADT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADT
*  INTO TABLE @DATA(IT_DTADT2).
*--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_DTADT INDEX 1 INTO DATA(WA_DTADT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADT>-T1 = 1.
<DTADT>-T2 = 1.
<DTADT>-T3 = 1.
<DTADT>-T4A = 1.
<DTADT>-T4B = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADT-T5, sy-vline,
  WA_DTADT-T6, sy-vline,
  WA_DTADT-T7A, sy-vline,
  WA_DTADT-T7B, sy-vline,
  WA_DTADT-T8, sy-vline,
  WA_DTADT-T9A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADT 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_DTADT 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_DTADT INTO WA_DTADT.


*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_DTADT_STR, 
T1 TYPE STRING,
T2 TYPE STRING,
T3 TYPE STRING,
T4A TYPE STRING,
T4B TYPE STRING,
T5 TYPE STRING,
T6 TYPE STRING,
T7A TYPE STRING,
T7B TYPE STRING,
T8 TYPE STRING,
T9A TYPE STRING,
T9B TYPE STRING,
T9C TYPE STRING,
T9D TYPE STRING,
T9E TYPE STRING,
T10A TYPE STRING,
T10B TYPE STRING,
T10C TYPE STRING,
T10D TYPE STRING,
T10E TYPE STRING,
T11A TYPE STRING,
T11B TYPE STRING,
T12 TYPE STRING,
T13 TYPE STRING,
T14A TYPE STRING,
T14B TYPE STRING,
T15_1 TYPE STRING,
T15_2 TYPE STRING,
T15_3 TYPE STRING,
T15_4 TYPE STRING,
T16 TYPE STRING,
T17 TYPE STRING,
T18 TYPE STRING,
T19 TYPE STRING,
T20 TYPE STRING,
T21 TYPE STRING,
T22 TYPE STRING,
T23 TYPE STRING,
T24 TYPE STRING,
T25 TYPE STRING,
T26 TYPE STRING,
T27 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADT_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_DTADT_STR-T1 sy-vline 
WA_DTADT_STR-T2 sy-vline 
WA_DTADT_STR-T3 sy-vline 
WA_DTADT_STR-T4A sy-vline 
WA_DTADT_STR-T4B sy-vline 
WA_DTADT_STR-T5 sy-vline 
WA_DTADT_STR-T6 sy-vline 
WA_DTADT_STR-T7A sy-vline 
WA_DTADT_STR-T7B sy-vline 
WA_DTADT_STR-T8 sy-vline 
WA_DTADT_STR-T9A sy-vline 
WA_DTADT_STR-T9B sy-vline 
WA_DTADT_STR-T9C sy-vline 
WA_DTADT_STR-T9D sy-vline 
WA_DTADT_STR-T9E sy-vline 
WA_DTADT_STR-T10A sy-vline 
WA_DTADT_STR-T10B sy-vline 
WA_DTADT_STR-T10C sy-vline 
WA_DTADT_STR-T10D sy-vline 
WA_DTADT_STR-T10E sy-vline 
WA_DTADT_STR-T11A sy-vline 
WA_DTADT_STR-T11B sy-vline 
WA_DTADT_STR-T12 sy-vline 
WA_DTADT_STR-T13 sy-vline 
WA_DTADT_STR-T14A sy-vline 
WA_DTADT_STR-T14B sy-vline 
WA_DTADT_STR-T15_1 sy-vline 
WA_DTADT_STR-T15_2 sy-vline 
WA_DTADT_STR-T15_3 sy-vline 
WA_DTADT_STR-T15_4 sy-vline 
WA_DTADT_STR-T16 sy-vline 
WA_DTADT_STR-T17 sy-vline 
WA_DTADT_STR-T18 sy-vline 
WA_DTADT_STR-T19 sy-vline 
WA_DTADT_STR-T20 sy-vline 
WA_DTADT_STR-T21 sy-vline 
WA_DTADT_STR-T22 sy-vline 
WA_DTADT_STR-T23 sy-vline 
WA_DTADT_STR-T24 sy-vline 
WA_DTADT_STR-T25 sy-vline 
WA_DTADT_STR-T26 sy-vline 
WA_DTADT_STR-T27 sy-vline      INTO ld_text SEPARATED BY SPACE.

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