# OpenLink Virtuoso Universal Server: Documentation - code-file

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Virtuoso Functions Guide

## code-file

Code-behind file containing SQL script.
< code-file url (required) debug-srcfile (optional) debug-srcline (optional) debug-log (optional) />
Description

This element is used to load an external SQL script after page class compilation and before page execution. This script may contain page subclass or custom control definitions. In this way SQL code can be separated from VSPX markup, or in other words to separate page design from application logic.

Attributes
url

URL of file to be loaded after VSPX page compilation. If relative then the base is the page where the control resides (i.e. same URL resolution rules applied as for includes).

debug-srcfile

URI of the source document where the tag comes from.

debug-srcline

Line number in the source document where the tag comes from.

debug-log

This defines what sort of data are saved to the debugging log.

Examples
Code-behind SQL script

<?xml version="1.0"?> <!-- - - $Id: code_file__0.vspx,v 1.2 2006/08/16 00:04:15 source Exp $ - - This file is part of the OpenLink Software Virtuoso Open-Source (VOS) - project. - - Copyright (C) 1998-2006 OpenLink Software - - This project is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by the - Free Software Foundation; only version 2 of the License, dated June 1991. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License along - with this program; if not, write to the Free Software Foundation, Inc., - 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - The script of a button's post event is in separate SQL file. The code_file__0.sql contents: drop type my_page_subclass ; create type my_page_subclass under DB.dba.page__vspx_code__file____0_vspx temporary self as ref overriding method vc_post_b1 (control vspx_button, e vspx_event) returns any, method button_change (control vspx_button) returns any ; create method vc_post_b1 (inout control vspx_button, inout e vspx_event) for my_page_subclass { if (not control.vc_focus) return; self.button_change (control); return; } ; create method button_change (inout control vspx_button) for my_page_subclass { self.var1 := self.var1 + 1; control.ufl_value := 'Activated'; } ;

    <v:page name="page1" xmlns:v="http://www.openlinksw.com/vspx/" page-subclass="my_page_subclass">
      <html>
        <body>
          <v:code-file  url="code_file__0.sql"/>
          <v:variable name="var1" type="int" default="0" param-name="id" persist="pagestate" />
          <v:form type="simple" name="f1">
    	<v:label name="l1" value="--self.var1" format="%d" />
    	<v:button action="simple" name="b1" value="Submit" />
          </v:form>
        </body>
      </html>
    </v:page>