ABAP Select data from SAP table PD3DBNA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PD3DBNA 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 PD3DBNA. 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 PD3DBNA 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_PD3DBNA TYPE STANDARD TABLE OF PD3DBNA,
      WA_PD3DBNA TYPE PD3DBNA,
      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: <PD3DBNA> TYPE PD3DBNA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PD3DBNA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PD3DBNA
  INTO TABLE IT_PD3DBNA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PD3DBNA
*  INTO TABLE @DATA(IT_PD3DBNA2).
*--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_PD3DBNA INDEX 1 INTO DATA(WA_PD3DBNA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PD3DBNA ASSIGNING <PD3DBNA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PD3DBNA>-MANDT = 1.
<PD3DBNA>-PERNR = 1.
<PD3DBNA>-JAHR = 1.
<PD3DBNA>-MNR = 1.
<PD3DBNA>-FMNA = 1.

ENDLOOP.

LOOP AT IT_PD3DBNA INTO WA_PD3DBNA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PD3DBNA-VONA, sy-vline,
  WA_PD3DBNA-VOSA, sy-vline,
  WA_PD3DBNA-NAZU, sy-vline,
  WA_PD3DBNA-TITEL, sy-vline,
  WA_PD3DBNA-KENNZAB, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PD3DBNA 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_PD3DBNA 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_PD3DBNA INTO WA_PD3DBNA.


*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_PD3DBNA_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
JAHR TYPE STRING,
MNR TYPE STRING,
FMNA TYPE STRING,
VONA TYPE STRING,
VOSA TYPE STRING,
NAZU TYPE STRING,
TITEL TYPE STRING,
KENNZAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PD3DBNA_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_PD3DBNA_STR-MANDT sy-vline 
WA_PD3DBNA_STR-PERNR sy-vline 
WA_PD3DBNA_STR-JAHR sy-vline 
WA_PD3DBNA_STR-MNR sy-vline 
WA_PD3DBNA_STR-FMNA sy-vline 
WA_PD3DBNA_STR-VONA sy-vline 
WA_PD3DBNA_STR-VOSA sy-vline 
WA_PD3DBNA_STR-NAZU sy-vline 
WA_PD3DBNA_STR-TITEL sy-vline 
WA_PD3DBNA_STR-KENNZAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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