ABAP Select data from SAP table PPDHD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PPDHD
*  INTO TABLE @DATA(IT_PPDHD2).
*--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_PPDHD INDEX 1 INTO DATA(WA_PPDHD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PPDHD>-CLIENT = 1.
<PPDHD>-DOCNUM = 1.
<PPDHD>-DOCTYP = 1.
<PPDHD>-GLVOR = 1.
<PPDHD>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PPDHD-BUDAT, sy-vline,
  WA_PPDHD-BLDAT, sy-vline,
  WA_PPDHD-GJAHR, sy-vline,
  WA_PPDHD-MONAT, sy-vline,
  WA_PPDHD-XBLNR, sy-vline,
  WA_PPDHD-BLART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PPDHD 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_PPDHD 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_PPDHD INTO WA_PPDHD.


*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.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PPDHD-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPDHD-GJAHR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PPDHD_STR, 
CLIENT TYPE STRING,
DOCNUM TYPE STRING,
DOCTYP TYPE STRING,
GLVOR TYPE STRING,
BUKRS TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
XBLNR TYPE STRING,
BLART TYPE STRING,
EVTYP TYPE STRING,
RUNID TYPE STRING,
REVDOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PPDHD_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_PPDHD_STR-CLIENT sy-vline 
WA_PPDHD_STR-DOCNUM sy-vline 
WA_PPDHD_STR-DOCTYP sy-vline 
WA_PPDHD_STR-GLVOR sy-vline 
WA_PPDHD_STR-BUKRS sy-vline 
WA_PPDHD_STR-BUDAT sy-vline 
WA_PPDHD_STR-BLDAT sy-vline 
WA_PPDHD_STR-GJAHR sy-vline 
WA_PPDHD_STR-MONAT sy-vline 
WA_PPDHD_STR-XBLNR sy-vline 
WA_PPDHD_STR-BLART sy-vline 
WA_PPDHD_STR-EVTYP sy-vline 
WA_PPDHD_STR-RUNID sy-vline 
WA_PPDHD_STR-REVDOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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