ABAP Select data from SAP table PTDBD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTDBD
*  INTO TABLE @DATA(IT_PTDBD2).
*--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_PTDBD INDEX 1 INTO DATA(WA_PTDBD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTDBD>-BEGDA = 1.
<PTDBD>-ENDDA = 1.
<PTDBD>-ZVKAN = 1.
<PTDBD>-ZVKAS = 1.
<PTDBD>-ZVKSP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTDBD-STKNZ, sy-vline,
  WA_PTDBD-BAUTY, sy-vline,
  WA_PTDBD-WOKNZ, sy-vline,
  WA_PTDBD-BNRSK, sy-vline,
  WA_PTDBD-TGG02, sy-vline,
  WA_PTDBD-APZNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTDBD 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_PTDBD 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_PTDBD INTO WA_PTDBD.


*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_PTDBD_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ZVKAN TYPE STRING,
ZVKAS TYPE STRING,
ZVKSP TYPE STRING,
STKNZ TYPE STRING,
BAUTY TYPE STRING,
WOKNZ TYPE STRING,
BNRSK TYPE STRING,
TGG02 TYPE STRING,
APZNR TYPE STRING,
I5DBB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTDBD_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_PTDBD_STR-BEGDA sy-vline 
WA_PTDBD_STR-ENDDA sy-vline 
WA_PTDBD_STR-ZVKAN sy-vline 
WA_PTDBD_STR-ZVKAS sy-vline 
WA_PTDBD_STR-ZVKSP sy-vline 
WA_PTDBD_STR-STKNZ sy-vline 
WA_PTDBD_STR-BAUTY sy-vline 
WA_PTDBD_STR-WOKNZ sy-vline 
WA_PTDBD_STR-BNRSK sy-vline 
WA_PTDBD_STR-TGG02 sy-vline 
WA_PTDBD_STR-APZNR sy-vline 
WA_PTDBD_STR-I5DBB sy-vline      INTO ld_text SEPARATED BY SPACE.

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