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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Move the cursor of a lob object</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.cubrid-lob2-seek64" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">cubrid_lob2_seek64</h1>
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<p class="verinfo">(PECL CUBRID >= 8.4.1)</p><p class="refpurpose"><span class="refname">cubrid_lob2_seek64</span> — <span class="dc-title">Move the cursor of a lob object</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.cubrid-lob2-seek64-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>cubrid_lob2_seek64</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$lob_identifier</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$offset</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$origin</code><span class="initializer"> = CUBRID_CURSOR_CURRENT</span></span>
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] ) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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The <span class="function"><strong>cubrid_lob2_seek64()</strong></span> function is used to move the cursor
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position of a lob object by the value set in the <code class="parameter">offset</code>
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argument, to the direction set in the <code class="parameter">origin</code> argument.
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If the <code class="parameter">offset</code> you want to move is larger than an integer
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data can be stored, you can use this function.
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</p>
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<p class="para">
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To set the <code class="parameter">origin</code> argument, you can use CUBRID_CURSOR_FIRST
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to set the cursor position moving forward <code class="parameter">offset</code> units from
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the first beginning. In this case, <code class="parameter">offset</code> must be a positive value.
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</p>
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<p class="para">
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If you use CUBRID_CURSOR_CURRENT for <code class="parameter">origin</code>, you can move
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forward or backward. and <code class="parameter">offset</code> can be positive or negative.
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</p>
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<p class="para">
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If you use CUBRID_CURSOR_LAST for <code class="parameter">origin</code>, you can move backward
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<code class="parameter">offset</code> units from the end of LOB object and <code class="parameter">offset</code> only can be positive.
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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If you use this function to move the cursor position of the lob object, you should pass <code class="parameter">offset</code> as a string.
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.cubrid-lob2-seek64-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">lob_identifier</code></dt>
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<dd>
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<p class="para">Lob identifier as a result of <span class="function"><a href="cubrid_lob2_new.html" class="function">cubrid_lob2_new()</a></span> or get from the result set.</p>
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</dd>
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<dt>
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<code class="parameter">offset</code></dt>
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<dd>
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<p class="para">Number of units you want to move the cursor.</p>
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</dd>
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<dt>
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<code class="parameter">origin</code></dt>
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<dd>
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<p class="para">This parameter can be the following values:</p>
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<p class="para">CUBRID_CURSOR_FIRST: move forward from the first beginning.</p>
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<p class="para">CUBRID_CURSOR_CURRENT: move forward or backward from the current position.</p>
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<p class="para">CUBRID_CURSOR_LAST: move backward at the end of LOB object.</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.cubrid-lob2-seek64-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<strong><code>TRUE</code></strong> if the process is successful and <strong><code>FALSE</code></strong> for failure.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.cubrid-lob2-seek64-examples">
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<h3 class="title">范例</h3>
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<div class="example" id="example-1129">
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<p><strong>Example #1 <span class="function"><strong>cubrid_lob2_seek64()</strong></span> example</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// test_lob (id INT, contents CLOB)<br />// Data length of doc_1.txt should be greater than 20101029056306120215.<br /><br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #0000BB">33000</span><span style="color: #007700">, </span><span style="color: #DD0000">"demodb"</span><span style="color: #007700">, </span><span style="color: #DD0000">"dba"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">cubrid_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">,</span><span style="color: #DD0000">"DROP TABLE if exists test_lob"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cubrid_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">,</span><span style="color: #DD0000">"CREATE TABLE test_lob (id INT, contents CLOB)"</span><span style="color: #007700">);<br /> <br /></span><span style="color: #0000BB">$req </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"INSERT INTO test_lob VALUES (?, ?)"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cubrid_bind</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$lob </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_lob2_new</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"clob"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cubrid_lob2_import</span><span style="color: #007700">(</span><span style="color: #0000BB">$lob</span><span style="color: #007700">, </span><span style="color: #DD0000">"doc_1.txt"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cubrid_lob2_bind</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">$lob</span><span style="color: #007700">, </span><span style="color: #DD0000">'CLOB'</span><span style="color: #007700">); </span><span style="color: #FF8000">// or cubrid_lob2_bind($req, 2, $lob);<br /><br /></span><span style="color: #0000BB">cubrid_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">cubrid_lob2_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$lob</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$req </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"select * from test_lob"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_fetch_row</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">, </span><span style="color: #0000BB">CUBRID_LOB</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$lob </span><span style="color: #007700">= </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">];<br /><br /></span><span style="color: #0000BB">cubrid_lob2_seek64</span><span style="color: #007700">(</span><span style="color: #0000BB">$lob</span><span style="color: #007700">, </span><span style="color: #DD0000">"20101029056306120215"</span><span style="color: #007700">, </span><span style="color: #0000BB">CUBRID_CURSOR_FIRST</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_lob2_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$lob</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$data</span><span style="color: #007700">.</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">cubrid_disconnect</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.cubrid-lob2-seek64-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="cubrid_lob2_read.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_read()</a> - Read from BLOB/CLOB data</span></li>
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<li class="member"><span class="function"><a href="cubrid_lob2_write.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_write()</a> - Write to a lob object</span></li>
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<li class="member"><span class="function"><a href="cubrid_lob2_seek.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_seek()</a> - Move the cursor of a lob object</span></li>
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<li class="member"><span class="function"><a href="cubrid_lob2_tell.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_tell()</a> - Tell the cursor position of the LOB object</span></li>
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<li class="member"><span class="function"><a href="cubrid_lob2_tell64.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_tell64()</a> - Tell the cursor position of the LOB object</span></li>
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<li class="member"><span class="function"><a href="cubrid_lob2_size.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_size()</a> - Get a lob object's size</span></li>
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<li class="member"><span class="function"><a href="cubrid_lob2_size64.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_size64()</a> - Get a lob object's size</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |