ABAP Select data from SAP table P2NZ_LVACC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2NZ_LVACC 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_LVACC. 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_LVACC 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_LVACC TYPE STANDARD TABLE OF P2NZ_LVACC,
      WA_P2NZ_LVACC TYPE P2NZ_LVACC,
      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_LVACC> TYPE P2NZ_LVACC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2NZ_LVACC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2NZ_LVACC
  INTO TABLE IT_P2NZ_LVACC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2NZ_LVACC
*  INTO TABLE @DATA(IT_P2NZ_LVACC2).
*--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_LVACC INDEX 1 INTO DATA(WA_P2NZ_LVACC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2NZ_LVACC ASSIGNING <P2NZ_LVACC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2NZ_LVACC>-MANDT = 1.
<P2NZ_LVACC>-DCT_PERNR = 1.
<P2NZ_LVACC>-DCT_SEQNR = 1.
<P2NZ_LVACC>-DCT_ROWID = 1.
<P2NZ_LVACC>-URART = 1.

ENDLOOP.

LOOP AT IT_P2NZ_LVACC INTO WA_P2NZ_LVACC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2NZ_LVACC-RECTY, sy-vline,
  WA_P2NZ_LVACC-RECYR, sy-vline,
  WA_P2NZ_LVACC-ACCID, sy-vline,
  WA_P2NZ_LVACC-STATU, sy-vline,
  WA_P2NZ_LVACC-LTANN, sy-vline,
  WA_P2NZ_LVACC-DEACT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2NZ_LVACC 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_LVACC 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_LVACC INTO WA_P2NZ_LVACC.


*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_LVACC_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
URART TYPE STRING,
RECTY TYPE STRING,
RECYR TYPE STRING,
ACCID TYPE STRING,
STATU TYPE STRING,
LTANN TYPE STRING,
DEACT TYPE STRING,
EFFDT TYPE STRING,
IYRPD TYPE STRING,
ADJTY TYPE STRING,
ENTAD TYPE STRING,
ENTPH TYPE STRING,
ENTNH TYPE STRING,
ENTAM TYPE STRING,
ADJMV TYPE STRING,
ADJHR TYPE STRING,
GRSAM TYPE STRING,
GRSWK TYPE STRING,
AVWKY TYPE STRING,
AVRTE TYPE STRING,
PAYID TYPE STRING,
FYRPD TYPE STRING,
ABSAM TYPE STRING,
ABSWK TYPE STRING,
WKHRS TYPE STRING,
LVBAL TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2NZ_LVACC_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_LVACC_STR-MANDT sy-vline 
WA_P2NZ_LVACC_STR-DCT_PERNR sy-vline 
WA_P2NZ_LVACC_STR-DCT_SEQNR sy-vline 
WA_P2NZ_LVACC_STR-DCT_ROWID sy-vline 
WA_P2NZ_LVACC_STR-URART sy-vline 
WA_P2NZ_LVACC_STR-RECTY sy-vline 
WA_P2NZ_LVACC_STR-RECYR sy-vline 
WA_P2NZ_LVACC_STR-ACCID sy-vline 
WA_P2NZ_LVACC_STR-STATU sy-vline 
WA_P2NZ_LVACC_STR-LTANN sy-vline 
WA_P2NZ_LVACC_STR-DEACT sy-vline 
WA_P2NZ_LVACC_STR-EFFDT sy-vline 
WA_P2NZ_LVACC_STR-IYRPD sy-vline 
WA_P2NZ_LVACC_STR-ADJTY sy-vline 
WA_P2NZ_LVACC_STR-ENTAD sy-vline 
WA_P2NZ_LVACC_STR-ENTPH sy-vline 
WA_P2NZ_LVACC_STR-ENTNH sy-vline 
WA_P2NZ_LVACC_STR-ENTAM sy-vline 
WA_P2NZ_LVACC_STR-ADJMV sy-vline 
WA_P2NZ_LVACC_STR-ADJHR sy-vline 
WA_P2NZ_LVACC_STR-GRSAM sy-vline 
WA_P2NZ_LVACC_STR-GRSWK sy-vline 
WA_P2NZ_LVACC_STR-AVWKY sy-vline 
WA_P2NZ_LVACC_STR-AVRTE sy-vline 
WA_P2NZ_LVACC_STR-PAYID sy-vline 
WA_P2NZ_LVACC_STR-FYRPD sy-vline 
WA_P2NZ_LVACC_STR-ABSAM sy-vline 
WA_P2NZ_LVACC_STR-ABSWK sy-vline 
WA_P2NZ_LVACC_STR-WKHRS sy-vline 
WA_P2NZ_LVACC_STR-LVBAL sy-vline 
WA_P2NZ_LVACC_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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