ABAP Select data from SAP table VZPARZN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VZPARZN
*  INTO TABLE @DATA(IT_VZPARZN2).
*--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_VZPARZN INDEX 1 INTO DATA(WA_VZPARZN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VZPARZN>-MANDT = 1.
<VZPARZN>-PARTNR = 1.
<VZPARZN>-RINTPERS = 1.
<VZPARZN>-SINTPOS = 1.
<VZPARZN>-JSELBST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VZPARZN-DGEBURT, sy-vline,
  WA_VZPARZN-XGEBORT, sy-vline,
  WA_VZPARZN-SFAMILIE, sy-vline,
  WA_VZPARZN-SGUETER, sy-vline,
  WA_VZPARZN-AKINDER, sy-vline,
  WA_VZPARZN-APERSON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VZPARZN 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_VZPARZN 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_VZPARZN INTO WA_VZPARZN.


*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 YEINKO
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_VZPARZN-YEINKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VZPARZN-YEINKO.
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_VZPARZN_STR, 
MANDT TYPE STRING,
PARTNR TYPE STRING,
RINTPERS TYPE STRING,
SINTPOS TYPE STRING,
JSELBST TYPE STRING,
DGEBURT TYPE STRING,
XGEBORT TYPE STRING,
SFAMILIE TYPE STRING,
SGUETER TYPE STRING,
AKINDER TYPE STRING,
APERSON TYPE STRING,
DBSSEIT TYPE STRING,
XBERUF TYPE STRING,
XBSALS TYPE STRING,
XARBGEB TYPE STRING,
BEINKO TYPE STRING,
SGRP8 TYPE STRING,
SGRP9 TYPE STRING,
SGRP10 TYPE STRING,
SGRP11 TYPE STRING,
SFRT1 TYPE STRING,
SFRT2 TYPE STRING,
SFRT3 TYPE STRING,
DBSBIS TYPE STRING,
DTOD TYPE STRING,
SWIRTBR TYPE STRING,
SRSZKE TYPE STRING,
XGEBNAME TYPE STRING,
XGEBNAMZ TYPE STRING,
SZUGHK TYPE STRING,
SGRDWHR TYPE STRING,
YEINKO TYPE STRING,
MYEINKO TYPE STRING,
BMEINKO TYPE STRING,
JAWVEROR TYPE STRING,
DAWVO TYPE STRING,
BNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VZPARZN_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_VZPARZN_STR-MANDT sy-vline 
WA_VZPARZN_STR-PARTNR sy-vline 
WA_VZPARZN_STR-RINTPERS sy-vline 
WA_VZPARZN_STR-SINTPOS sy-vline 
WA_VZPARZN_STR-JSELBST sy-vline 
WA_VZPARZN_STR-DGEBURT sy-vline 
WA_VZPARZN_STR-XGEBORT sy-vline 
WA_VZPARZN_STR-SFAMILIE sy-vline 
WA_VZPARZN_STR-SGUETER sy-vline 
WA_VZPARZN_STR-AKINDER sy-vline 
WA_VZPARZN_STR-APERSON sy-vline 
WA_VZPARZN_STR-DBSSEIT sy-vline 
WA_VZPARZN_STR-XBERUF sy-vline 
WA_VZPARZN_STR-XBSALS sy-vline 
WA_VZPARZN_STR-XARBGEB sy-vline 
WA_VZPARZN_STR-BEINKO sy-vline 
WA_VZPARZN_STR-SGRP8 sy-vline 
WA_VZPARZN_STR-SGRP9 sy-vline 
WA_VZPARZN_STR-SGRP10 sy-vline 
WA_VZPARZN_STR-SGRP11 sy-vline 
WA_VZPARZN_STR-SFRT1 sy-vline 
WA_VZPARZN_STR-SFRT2 sy-vline 
WA_VZPARZN_STR-SFRT3 sy-vline 
WA_VZPARZN_STR-DBSBIS sy-vline 
WA_VZPARZN_STR-DTOD sy-vline 
WA_VZPARZN_STR-SWIRTBR sy-vline 
WA_VZPARZN_STR-SRSZKE sy-vline 
WA_VZPARZN_STR-XGEBNAME sy-vline 
WA_VZPARZN_STR-XGEBNAMZ sy-vline 
WA_VZPARZN_STR-SZUGHK sy-vline 
WA_VZPARZN_STR-SGRDWHR sy-vline 
WA_VZPARZN_STR-YEINKO sy-vline 
WA_VZPARZN_STR-MYEINKO sy-vline 
WA_VZPARZN_STR-BMEINKO sy-vline 
WA_VZPARZN_STR-JAWVEROR sy-vline 
WA_VZPARZN_STR-DAWVO sy-vline 
WA_VZPARZN_STR-BNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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