ABAP Select data from SAP table PTDBC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTDBC
*  INTO TABLE @DATA(IT_PTDBC2).
*--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_PTDBC INDEX 1 INTO DATA(WA_PTDBC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTDBC>-DATUM = 1.
<PTDBC>-C1ZNR = 1.
<PTDBC>-RUECK = 1.
<PTDBC>-FKEJN = 1.
<PTDBC>-STABR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTDBC-LGART, sy-vline,
  WA_PTDBC-BETRG, sy-vline,
  WA_PTDBC-SFLGA, sy-vline,
  WA_PTDBC-SFBTG, sy-vline,
  WA_PTDBC-SPLGA, sy-vline,
  WA_PTDBC-SPBTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTDBC 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_PTDBC 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_PTDBC INTO WA_PTDBC.


*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_PTDBC_STR, 
DATUM TYPE STRING,
C1ZNR TYPE STRING,
RUECK TYPE STRING,
FKEJN TYPE STRING,
STABR TYPE STRING,
LGART TYPE STRING,
BETRG TYPE STRING,
SFLGA TYPE STRING,
SFBTG TYPE STRING,
SPLGA TYPE STRING,
SPBTG TYPE STRING,
PVLGA TYPE STRING,
PVBTG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTDBC_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_PTDBC_STR-DATUM sy-vline 
WA_PTDBC_STR-C1ZNR sy-vline 
WA_PTDBC_STR-RUECK sy-vline 
WA_PTDBC_STR-FKEJN sy-vline 
WA_PTDBC_STR-STABR sy-vline 
WA_PTDBC_STR-LGART sy-vline 
WA_PTDBC_STR-BETRG sy-vline 
WA_PTDBC_STR-SFLGA sy-vline 
WA_PTDBC_STR-SFBTG sy-vline 
WA_PTDBC_STR-SPLGA sy-vline 
WA_PTDBC_STR-SPBTG sy-vline 
WA_PTDBC_STR-PVLGA sy-vline 
WA_PTDBC_STR-PVBTG sy-vline      INTO ld_text SEPARATED BY SPACE.

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