ABAP Select data from SAP table DTAXGBBD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTAXGBBD
*  INTO TABLE @DATA(IT_DTAXGBBD2).
*--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_DTAXGBBD INDEX 1 INTO DATA(WA_DTAXGBBD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTAXGBBD>-DBSCD = 1.
<DTAXGBBD>-DACNO = 1.
<DTAXGBBD>-DATYP = 1.
<DTAXGBBD>-TCODE = 1.
<DTAXGBBD>-OBSCD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTAXGBBD-OACNO, sy-vline,
  WA_DTAXGBBD-FILL1, sy-vline,
  WA_DTAXGBBD-AMOUN, sy-vline,
  WA_DTAXGBBD-UNAME, sy-vline,
  WA_DTAXGBBD-UREFE, sy-vline,
  WA_DTAXGBBD-ANAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTAXGBBD 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_DTAXGBBD 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_DTAXGBBD INTO WA_DTAXGBBD.


*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_DTAXGBBD_STR, 
DBSCD TYPE STRING,
DACNO TYPE STRING,
DATYP TYPE STRING,
TCODE TYPE STRING,
OBSCD TYPE STRING,
OACNO TYPE STRING,
FILL1 TYPE STRING,
AMOUN TYPE STRING,
UNAME TYPE STRING,
UREFE TYPE STRING,
ANAME TYPE STRING,
PRODA TYPE STRING,
PAD04 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTAXGBBD_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_DTAXGBBD_STR-DBSCD sy-vline 
WA_DTAXGBBD_STR-DACNO sy-vline 
WA_DTAXGBBD_STR-DATYP sy-vline 
WA_DTAXGBBD_STR-TCODE sy-vline 
WA_DTAXGBBD_STR-OBSCD sy-vline 
WA_DTAXGBBD_STR-OACNO sy-vline 
WA_DTAXGBBD_STR-FILL1 sy-vline 
WA_DTAXGBBD_STR-AMOUN sy-vline 
WA_DTAXGBBD_STR-UNAME sy-vline 
WA_DTAXGBBD_STR-UREFE sy-vline 
WA_DTAXGBBD_STR-ANAME sy-vline 
WA_DTAXGBBD_STR-PRODA sy-vline 
WA_DTAXGBBD_STR-PAD04 sy-vline      INTO ld_text SEPARATED BY SPACE.

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