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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 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
-
-
-->
<!-- fk_enforce -->
<refentry id="fn_fk_check_input_values">
<refmeta>
<refentrytitle>fk_check_input_values</refentrytitle>
<refmiscinfo>admin</refmiscinfo>
</refmeta>
<refnamediv>
<refname>fk_check_input_values</refname>
<refpurpose>alter default foreign key checking behavior</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_fk_check_input_values">
<funcprototype id="fproto_fk_check_input_values">
<funcdef>DB.DBA.<function>fk_check_input_values</function></funcdef>
<paramdef>in <parameter>mode</parameter> integer</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_fk_check_input_values"><title>Description</title>
<simplelist>
<member>mode = 1 - on</member>
<member>mode = 0 - off</member>
</simplelist>
<para>
Enforcing foreign key constraints is enabled by default.
This function allows globally disabling it without however disabling all triggers.
This may be useful for large data imports or other special circumstances.
The return value is the previous state of this setting, 0 for off, 1, for on. The effect of this function is persistent and survives server restart.
</para>
</refsect1>
</refentry>
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