ABAP Select data from SAP table P08_NFI_PS_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_NFI_PS_ALV 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_NFI_PS_ALV. 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_NFI_PS_ALV 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_NFI_PS_ALV TYPE STANDARD TABLE OF P08_NFI_PS_ALV,
      WA_P08_NFI_PS_ALV TYPE P08_NFI_PS_ALV,
      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_NFI_PS_ALV> TYPE P08_NFI_PS_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_NFI_PS_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_NFI_PS_ALV
  INTO TABLE IT_P08_NFI_PS_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_NFI_PS_ALV
*  INTO TABLE @DATA(IT_P08_NFI_PS_ALV2).
*--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_NFI_PS_ALV INDEX 1 INTO DATA(WA_P08_NFI_PS_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_NFI_PS_ALV ASSIGNING <P08_NFI_PS_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_NFI_PS_ALV>-PERNR = 1.
<P08_NFI_PS_ALV>-ENAME = 1.
<P08_NFI_PS_ALV>-EMPRF = 1.
<P08_NFI_PS_ALV>-PSTNO = 1.
<P08_NFI_PS_ALV>-DEPT = 1.

ENDLOOP.

LOOP AT IT_P08_NFI_PS_ALV INTO WA_P08_NFI_PS_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_NFI_PS_ALV-TITLE, sy-vline,
  WA_P08_NFI_PS_ALV-SEX, sy-vline,
  WA_P08_NFI_PS_ALV-SURNAME, sy-vline,
  WA_P08_NFI_PS_ALV-FORENAMES, sy-vline,
  WA_P08_NFI_PS_ALV-MIDDLENAMES, sy-vline,
  WA_P08_NFI_PS_ALV-ADDR1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_NFI_PS_ALV 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_NFI_PS_ALV 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_NFI_PS_ALV INTO WA_P08_NFI_PS_ALV.


*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 PDATE, internal->external for field DOB
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P08_NFI_PS_ALV-DOB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P08_NFI_PS_ALV-DOB.
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_P08_NFI_PS_ALV_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
EMPRF TYPE STRING,
PSTNO TYPE STRING,
DEPT TYPE STRING,
TITLE TYPE STRING,
SEX TYPE STRING,
SURNAME TYPE STRING,
FORENAMES TYPE STRING,
MIDDLENAMES TYPE STRING,
ADDR1 TYPE STRING,
ADDR2 TYPE STRING,
ADDR3 TYPE STRING,
ADDR4 TYPE STRING,
POSTCODE TYPE STRING,
UPRN TYPE STRING,
DOB TYPE STRING,
HOME TYPE STRING,
MOBILE TYPE STRING,
EMAIL TYPE STRING,
PASSPORT TYPE STRING,
STARTDATE TYPE STRING,
DATELEFT TYPE STRING,
LEAVER TYPE STRING,
NINO TYPE STRING,
FTPT TYPE STRING,
GROSSPAY TYPE STRING,
WKLYHRS TYPE STRING,
LASTPAID TYPE STRING,
TEACHER TYPE STRING,
SORTCODE TYPE STRING,
BANKACCOUNT TYPE STRING,
BSROLLNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_NFI_PS_ALV_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_NFI_PS_ALV_STR-PERNR sy-vline 
WA_P08_NFI_PS_ALV_STR-ENAME sy-vline 
WA_P08_NFI_PS_ALV_STR-EMPRF sy-vline 
WA_P08_NFI_PS_ALV_STR-PSTNO sy-vline 
WA_P08_NFI_PS_ALV_STR-DEPT sy-vline 
WA_P08_NFI_PS_ALV_STR-TITLE sy-vline 
WA_P08_NFI_PS_ALV_STR-SEX sy-vline 
WA_P08_NFI_PS_ALV_STR-SURNAME sy-vline 
WA_P08_NFI_PS_ALV_STR-FORENAMES sy-vline 
WA_P08_NFI_PS_ALV_STR-MIDDLENAMES sy-vline 
WA_P08_NFI_PS_ALV_STR-ADDR1 sy-vline 
WA_P08_NFI_PS_ALV_STR-ADDR2 sy-vline 
WA_P08_NFI_PS_ALV_STR-ADDR3 sy-vline 
WA_P08_NFI_PS_ALV_STR-ADDR4 sy-vline 
WA_P08_NFI_PS_ALV_STR-POSTCODE sy-vline 
WA_P08_NFI_PS_ALV_STR-UPRN sy-vline 
WA_P08_NFI_PS_ALV_STR-DOB sy-vline 
WA_P08_NFI_PS_ALV_STR-HOME sy-vline 
WA_P08_NFI_PS_ALV_STR-MOBILE sy-vline 
WA_P08_NFI_PS_ALV_STR-EMAIL sy-vline 
WA_P08_NFI_PS_ALV_STR-PASSPORT sy-vline 
WA_P08_NFI_PS_ALV_STR-STARTDATE sy-vline 
WA_P08_NFI_PS_ALV_STR-DATELEFT sy-vline 
WA_P08_NFI_PS_ALV_STR-LEAVER sy-vline 
WA_P08_NFI_PS_ALV_STR-NINO sy-vline 
WA_P08_NFI_PS_ALV_STR-FTPT sy-vline 
WA_P08_NFI_PS_ALV_STR-GROSSPAY sy-vline 
WA_P08_NFI_PS_ALV_STR-WKLYHRS sy-vline 
WA_P08_NFI_PS_ALV_STR-LASTPAID sy-vline 
WA_P08_NFI_PS_ALV_STR-TEACHER sy-vline 
WA_P08_NFI_PS_ALV_STR-SORTCODE sy-vline 
WA_P08_NFI_PS_ALV_STR-BANKACCOUNT sy-vline 
WA_P08_NFI_PS_ALV_STR-BSROLLNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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