ABAP Select data from SAP table DTADNZ2A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DTADNZ2A 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 DTADNZ2A. 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 DTADNZ2A 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_DTADNZ2A TYPE STANDARD TABLE OF DTADNZ2A,
      WA_DTADNZ2A TYPE DTADNZ2A,
      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: <DTADNZ2A> TYPE DTADNZ2A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DTADNZ2A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DTADNZ2A
  INTO TABLE IT_DTADNZ2A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADNZ2A
*  INTO TABLE @DATA(IT_DTADNZ2A2).
*--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_DTADNZ2A INDEX 1 INTO DATA(WA_DTADNZ2A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DTADNZ2A ASSIGNING <DTADNZ2A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADNZ2A>-REC_TYPE = 1.
<DTADNZ2A>-BANK = 1.
<DTADNZ2A>-BRANCH = 1.
<DTADNZ2A>-ACCOUNT = 1.
<DTADNZ2A>-SUFFIX2 = 1.

ENDLOOP.

LOOP AT IT_DTADNZ2A INTO WA_DTADNZ2A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADNZ2A-SUFFIX1, sy-vline,
  WA_DTADNZ2A-TRANS_CODE, sy-vline,
  WA_DTADNZ2A-AMOUNT, sy-vline,
  WA_DTADNZ2A-TP_NAME, sy-vline,
  WA_DTADNZ2A-REF01, sy-vline,
  WA_DTADNZ2A-REF02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADNZ2A 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_DTADNZ2A 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_DTADNZ2A INTO WA_DTADNZ2A.


*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_DTADNZ2A_STR, 
REC_TYPE TYPE STRING,
BANK TYPE STRING,
BRANCH TYPE STRING,
ACCOUNT TYPE STRING,
SUFFIX2 TYPE STRING,
SUFFIX1 TYPE STRING,
TRANS_CODE TYPE STRING,
AMOUNT TYPE STRING,
TP_NAME TYPE STRING,
REF01 TYPE STRING,
REF02 TYPE STRING,
REF03 TYPE STRING,
REF04 TYPE STRING,
FILLER1 TYPE STRING,
REF05 TYPE STRING,
REF06 TYPE STRING,
REF07 TYPE STRING,
REF08 TYPE STRING,
FILLER2 TYPE STRING,
CRLF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADNZ2A_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_DTADNZ2A_STR-REC_TYPE sy-vline 
WA_DTADNZ2A_STR-BANK sy-vline 
WA_DTADNZ2A_STR-BRANCH sy-vline 
WA_DTADNZ2A_STR-ACCOUNT sy-vline 
WA_DTADNZ2A_STR-SUFFIX2 sy-vline 
WA_DTADNZ2A_STR-SUFFIX1 sy-vline 
WA_DTADNZ2A_STR-TRANS_CODE sy-vline 
WA_DTADNZ2A_STR-AMOUNT sy-vline 
WA_DTADNZ2A_STR-TP_NAME sy-vline 
WA_DTADNZ2A_STR-REF01 sy-vline 
WA_DTADNZ2A_STR-REF02 sy-vline 
WA_DTADNZ2A_STR-REF03 sy-vline 
WA_DTADNZ2A_STR-REF04 sy-vline 
WA_DTADNZ2A_STR-FILLER1 sy-vline 
WA_DTADNZ2A_STR-REF05 sy-vline 
WA_DTADNZ2A_STR-REF06 sy-vline 
WA_DTADNZ2A_STR-REF07 sy-vline 
WA_DTADNZ2A_STR-REF08 sy-vline 
WA_DTADNZ2A_STR-FILLER2 sy-vline 
WA_DTADNZ2A_STR-CRLF sy-vline      INTO ld_text SEPARATED BY SPACE.

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