ABAP Select data from SAP table P08_NIDUPL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_NIDUPL 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 P08_NIDUPL. 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 P08_NIDUPL 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_P08_NIDUPL TYPE STANDARD TABLE OF P08_NIDUPL,
      WA_P08_NIDUPL TYPE P08_NIDUPL,
      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: <P08_NIDUPL> TYPE P08_NIDUPL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_NIDUPL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_NIDUPL
  INTO TABLE IT_P08_NIDUPL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_NIDUPL
*  INTO TABLE @DATA(IT_P08_NIDUPL2).
*--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_P08_NIDUPL INDEX 1 INTO DATA(WA_P08_NIDUPL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_NIDUPL ASSIGNING <P08_NIDUPL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_NIDUPL>-PERNR = 1.
<P08_NIDUPL>-NICAT = 1.
<P08_NIDUPL>-DIRFB = 1.
<P08_NIDUPL>-PAYDT = 1.
<P08_NIDUPL>-ASSGM = 1.

ENDLOOP.

LOOP AT IT_P08_NIDUPL INTO WA_P08_NIDUPL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_NIDUPL-PRRTY, sy-vline,
  WA_P08_NIDUPL-APPS, sy-vline,
  WA_P08_NIDUPL-DIRRP, sy-vline,
  WA_P08_NIDUPL-DIRPW, sy-vline,
  WA_P08_NIDUPL-LSFLG, sy-vline,
  WA_P08_NIDUPL-LTLVR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_NIDUPL 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_P08_NIDUPL 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_P08_NIDUPL INTO WA_P08_NIDUPL.


*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_P08_NIDUPL_STR, 
PERNR TYPE STRING,
NICAT TYPE STRING,
DIRFB TYPE STRING,
PAYDT TYPE STRING,
ASSGM TYPE STRING,
PRRTY TYPE STRING,
APPS TYPE STRING,
DIRRP TYPE STRING,
DIRPW TYPE STRING,
LSFLG TYPE STRING,
LTLVR TYPE STRING,
NIPAY TYPE STRING,
NIBASE TYPE STRING,
AMTTOLEL TYPE STRING,
AMTLELEET TYPE STRING,
AMTEETERT TYPE STRING,
AMTERTUEL TYPE STRING,
AMTFROMUEL TYPE STRING,
EENIC TYPE STRING,
ERNIC TYPE STRING,
EENIR TYPE STRING,
ERNIR TYPE STRING,
DELFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_NIDUPL_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_P08_NIDUPL_STR-PERNR sy-vline 
WA_P08_NIDUPL_STR-NICAT sy-vline 
WA_P08_NIDUPL_STR-DIRFB sy-vline 
WA_P08_NIDUPL_STR-PAYDT sy-vline 
WA_P08_NIDUPL_STR-ASSGM sy-vline 
WA_P08_NIDUPL_STR-PRRTY sy-vline 
WA_P08_NIDUPL_STR-APPS sy-vline 
WA_P08_NIDUPL_STR-DIRRP sy-vline 
WA_P08_NIDUPL_STR-DIRPW sy-vline 
WA_P08_NIDUPL_STR-LSFLG sy-vline 
WA_P08_NIDUPL_STR-LTLVR sy-vline 
WA_P08_NIDUPL_STR-NIPAY sy-vline 
WA_P08_NIDUPL_STR-NIBASE sy-vline 
WA_P08_NIDUPL_STR-AMTTOLEL sy-vline 
WA_P08_NIDUPL_STR-AMTLELEET sy-vline 
WA_P08_NIDUPL_STR-AMTEETERT sy-vline 
WA_P08_NIDUPL_STR-AMTERTUEL sy-vline 
WA_P08_NIDUPL_STR-AMTFROMUEL sy-vline 
WA_P08_NIDUPL_STR-EENIC sy-vline 
WA_P08_NIDUPL_STR-ERNIC sy-vline 
WA_P08_NIDUPL_STR-EENIR sy-vline 
WA_P08_NIDUPL_STR-ERNIR sy-vline 
WA_P08_NIDUPL_STR-DELFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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