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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
-
-
-->
<refentry id="fn_udt_defines_field">
<refmeta>
<refentrytitle>udt_defines_field</refentrytitle>
<refmiscinfo>type</refmiscinfo>
</refmeta>
<refnamediv>
<refname>udt_defines_field</refname>
<refpurpose>Determines whether a user defined type contains a specified member.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_udt_defines_field">
<funcprototype id="fproto_udt_defines_field">
<funcdef>integer <function>udt_defines_field</function></funcdef>
<paramdef>in <parameter>udt</parameter> any</paramdef>
<paramdef>in <parameter>member_name</parameter> varchar</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_udt_defines_field">
<title>Description</title>
<para>This function is used to determine whether the supplied member_name
is a member contained by the supplied udt.</para>
</refsect1>
<refsect1 id="params_udt_defines_field">
<title>Parameters</title>
<refsect2><title>udt</title>
<para>A user defined type name as varchar or type instance.</para>
</refsect2>
<refsect2><title>member_name</title>
<para>The requested member name.</para>
</refsect2>
</refsect1>
<refsect1 id="ret_udt_defines_field"><title>Return Types</title>
<para>This function returns either 1 (true) or 0 (false). 1 (true) is
returned if the udt contains a member whose name is equal to the
value of member_name, or 0 otherwise.</para>
</refsect1>
<!--
<refsect1 id="errors_udt_defines_field">
<title>Errors</title>
<para>This function can generate the following errors:</para>
<errorcode></errorcode>
</refsect1>
-->
<refsect1 id="examples_udt_defines_field">
<title>Examples</title>
<example id="ex_udt_defines_field"><title>Simple Use</title>
<screen><![CDATA[
select udt_defines_field (new SER_UDT(), 'A');
]]></screen>
<para>returns 1</para>
<screen><![CDATA[
select udt_defines_field (new SER_UDT_SUB(), 'A');
]]></screen>
<para>returns 1</para>
<screen><![CDATA[
select udt_defines_field (new SER_UDT(), 'B');
]]></screen>
<para>returns 0;</para>
</example>
</refsect1>
<refsect1 id="seealso_udt_defines_field">
<title>See Also</title>
<para><link linkend="fn_udt_get"><function>udt_get()</function></link></para>
<para><link linkend="fn_udt_implements_method"><function>udt_implements_method()</function></link></para>
<para><link linkend="fn_udt_instance_of"><function>udt_instance_of()</function></link></para>
<para><link linkend="fn_udt_set"><function>udt_set()</function></link></para>
</refsect1>
</refentry>
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