ABAP Select data from SAP table DTADATB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADATB
*  INTO TABLE @DATA(IT_DTADATB2).
*--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_DTADATB INDEX 1 INTO DATA(WA_DTADATB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADATB>-FELD13 = 1.
<DTADATB>-FELD14 = 1.
<DTADATB>-FELD15 = 1.
<DTADATB>-FELD16A = 1.
<DTADATB>-FELD16B = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADATB-FELD17, sy-vline,
  WA_DTADATB-FELD18, sy-vline,
  WA_DTADATB-FELD19, sy-vline,
  WA_DTADATB-FELD20, sy-vline,
  WA_DTADATB-FELD21, sy-vline,
  WA_DTADATB-FELD22, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADATB 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_DTADATB 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_DTADATB INTO WA_DTADATB.


*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_DTADATB_STR, 
FELD13 TYPE STRING,
FELD14 TYPE STRING,
FELD15 TYPE STRING,
FELD16A TYPE STRING,
FELD16B TYPE STRING,
FELD17 TYPE STRING,
FELD18 TYPE STRING,
FELD19 TYPE STRING,
FELD20 TYPE STRING,
FELD21 TYPE STRING,
FELD22 TYPE STRING,
FELD23 TYPE STRING,
FELD24 TYPE STRING,
FELD25 TYPE STRING,
FELD26 TYPE STRING,
FELD27 TYPE STRING,
FELD28 TYPE STRING,
FELDCRLF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADATB_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_DTADATB_STR-FELD13 sy-vline 
WA_DTADATB_STR-FELD14 sy-vline 
WA_DTADATB_STR-FELD15 sy-vline 
WA_DTADATB_STR-FELD16A sy-vline 
WA_DTADATB_STR-FELD16B sy-vline 
WA_DTADATB_STR-FELD17 sy-vline 
WA_DTADATB_STR-FELD18 sy-vline 
WA_DTADATB_STR-FELD19 sy-vline 
WA_DTADATB_STR-FELD20 sy-vline 
WA_DTADATB_STR-FELD21 sy-vline 
WA_DTADATB_STR-FELD22 sy-vline 
WA_DTADATB_STR-FELD23 sy-vline 
WA_DTADATB_STR-FELD24 sy-vline 
WA_DTADATB_STR-FELD25 sy-vline 
WA_DTADATB_STR-FELD26 sy-vline 
WA_DTADATB_STR-FELD27 sy-vline 
WA_DTADATB_STR-FELD28 sy-vline 
WA_DTADATB_STR-FELDCRLF sy-vline      INTO ld_text SEPARATED BY SPACE.

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