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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 330922 $ -->
<refentry xml:id="function.cubrid-lob2-seek" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>cubrid_lob2_seek</refname>
<refpurpose>Move the cursor of a lob object.</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>cubrid_lob2_seek</methodname>
<methodparam><type>resource</type><parameter>lob_identifier</parameter></methodparam>
<methodparam><type>int</type><parameter>offset</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>origin</parameter><initializer>CUBRID_CURSOR_CURRENT</initializer></methodparam>
</methodsynopsis>
<para>
The <function>cubrid_lob2_seek</function> function is used to move the cursor
position of a lob object by the value set in the <parameter>offset</parameter>
argument, to the direction set in the <parameter>origin</parameter> argument.
</para>
<para>
To set the <parameter>origin</parameter> argument, you can use CUBRID_CURSOR_FIRST
to set the cursor position moving forward <parameter>offset</parameter> units from
the first beginning. In this case, <parameter>offset</parameter> must be a positive value.
</para>
<para>
If you use CUBRID_CURSOR_CURRENT for <parameter>origin</parameter>, you can move
forward or backward. and <parameter>offset</parameter> can be positive or negative.
</para>
<para>
If you use CUBRID_CURSOR_LAST for <parameter>origin</parameter>, you can move
backward <parameter>offset</parameter> units from the end of LOB object and
<parameter>offset</parameter> only can be positive.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>lob_identifier</parameter></term>
<listitem>
<para>Lob identifier as a result of <function>cubrid_lob2_new</function> or get from the result set.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>offset</parameter></term>
<listitem>
<para>Number of units you want to move the cursor.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>origin</parameter></term>
<listitem>
<para>This parameter can be the following values:</para>
<para>CUBRID_CURSOR_FIRST: move forward from the first beginning.</para>
<para>CUBRID_CURSOR_CURRENT: move forward or backward from the current position.</para>
<para>CUBRID_CURSOR_LAST: move backward at the end of LOB object.</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&true; if the process is successful and &false; for failure.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>cubrid_lob2_seek</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
// test_lob (id INT, contents CLOB)
$conn = cubrid_connect("localhost", 33000, "demodb", "dba", "");
cubrid_execute($conn,"DROP TABLE if exists test_lob");
cubrid_execute($conn,"CREATE TABLE test_lob (id INT, contents CLOB)");
$req = cubrid_prepare($conn, "INSERT INTO test_lob VALUES(2, ?)");
$lob = cubrid_lob2_new($conn, 'CLOB');
$len = cubrid_lob2_write($lob, "Hello world");
cubrid_lob2_seek($lob, 0, CUBRID_CURSOR_LAST);
cubrid_lob2_write($lob, "beautiful");
cubrid_lob2_seek($lob, 15, CUBRID_CURSOR_FIRST);
$data = cubrid_lob2_read($lob, 5);
echo $data."\n";
cubrid_lob2_bind($req, 1, $lob);
cubrid_execute($req);
cubrid_disconnect($conn);
?>
]]>
</programlisting>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>cubrid_lob2_read</function></member>
<member><function>cubrid_lob2_write</function></member>
<member><function>cubrid_lob2_seek64</function></member>
<member><function>cubrid_lob2_tell</function></member>
<member><function>cubrid_lob2_tell64</function></member>
<member><function>cubrid_lob2_size</function></member>
<member><function>cubrid_lob2_size64</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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