ABAP Select data from SAP table P2NZ_LVPAY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2NZ_LVPAY 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 P2NZ_LVPAY. 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 P2NZ_LVPAY 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_P2NZ_LVPAY TYPE STANDARD TABLE OF P2NZ_LVPAY,
      WA_P2NZ_LVPAY TYPE P2NZ_LVPAY,
      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: <P2NZ_LVPAY> TYPE P2NZ_LVPAY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2NZ_LVPAY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2NZ_LVPAY
  INTO TABLE IT_P2NZ_LVPAY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2NZ_LVPAY
*  INTO TABLE @DATA(IT_P2NZ_LVPAY2).
*--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_P2NZ_LVPAY INDEX 1 INTO DATA(WA_P2NZ_LVPAY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2NZ_LVPAY ASSIGNING <P2NZ_LVPAY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2NZ_LVPAY>-MANDT = 1.
<P2NZ_LVPAY>-DCT_PERNR = 1.
<P2NZ_LVPAY>-DCT_SEQNR = 1.
<P2NZ_LVPAY>-DCT_ROWID = 1.
<P2NZ_LVPAY>-KTART = 1.

ENDLOOP.

LOOP AT IT_P2NZ_LVPAY INTO WA_P2NZ_LVPAY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2NZ_LVPAY-ANNDA, sy-vline,
  WA_P2NZ_LVPAY-QUONR, sy-vline,
  WA_P2NZ_LVPAY-QUODE, sy-vline,
  WA_P2NZ_LVPAY-QUOUN, sy-vline,
  WA_P2NZ_LVPAY-PDAMT, sy-vline,
  WA_P2NZ_LVPAY-ABBEG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2NZ_LVPAY 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_P2NZ_LVPAY 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_P2NZ_LVPAY INTO WA_P2NZ_LVPAY.


*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_P2NZ_LVPAY_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
KTART TYPE STRING,
ANNDA TYPE STRING,
QUONR TYPE STRING,
QUODE TYPE STRING,
QUOUN TYPE STRING,
PDAMT TYPE STRING,
ABBEG TYPE STRING,
ABEND TYPE STRING,
AWART TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
PAYCD TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2NZ_LVPAY_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_P2NZ_LVPAY_STR-MANDT sy-vline 
WA_P2NZ_LVPAY_STR-DCT_PERNR sy-vline 
WA_P2NZ_LVPAY_STR-DCT_SEQNR sy-vline 
WA_P2NZ_LVPAY_STR-DCT_ROWID sy-vline 
WA_P2NZ_LVPAY_STR-KTART sy-vline 
WA_P2NZ_LVPAY_STR-ANNDA sy-vline 
WA_P2NZ_LVPAY_STR-QUONR sy-vline 
WA_P2NZ_LVPAY_STR-QUODE sy-vline 
WA_P2NZ_LVPAY_STR-QUOUN sy-vline 
WA_P2NZ_LVPAY_STR-PDAMT sy-vline 
WA_P2NZ_LVPAY_STR-ABBEG sy-vline 
WA_P2NZ_LVPAY_STR-ABEND sy-vline 
WA_P2NZ_LVPAY_STR-AWART sy-vline 
WA_P2NZ_LVPAY_STR-BEGDA sy-vline 
WA_P2NZ_LVPAY_STR-ENDDA sy-vline 
WA_P2NZ_LVPAY_STR-PAYCD sy-vline 
WA_P2NZ_LVPAY_STR-BEGUZ sy-vline 
WA_P2NZ_LVPAY_STR-ENDUZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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