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109 lines
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109 lines
7.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>返回最后的全局同步 ID (GTID)</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.mysqlnd-ms-get-last-gtid" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mysqlnd_ms_get_last_gtid</h1>
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<p class="verinfo">(PECL mysqlnd_ms >= 1.2.0)</p><p class="refpurpose"><span class="refname">mysqlnd_ms_get_last_gtid</span> — <span class="dc-title">返回最后的全局同步 ID (GTID)</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mysqlnd-ms-get-last-gtid-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>mysqlnd_ms_get_last_gtid</strong></span>
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( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$connection</code></span>
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) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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返回最后一次写操作以后的 GTID，他并不能保证一定是那次写操作产生的 GTID，但是得到的
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GTID 一定比这次写操作产生的 GTID 大。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mysqlnd-ms-get-last-gtid-parameters">
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<h3 class="title">参数</h3>
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<dl>
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<dt>
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<code class="parameter">connection</code></dt>
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<dd>
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<p class="para">
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由 <a href="ref.pdo_mysql.html" class="link">PDO_MYSQL</a>, <a href="book.mysqli.html" class="link">mysqli</a>>
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或者 <a href="book.mysql.html" class="link">ext/mysql</a> 产生的 MySQL 服务器连接，
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这些链接受 PECL/mysqlnd_ms 连接控制。连接的创建是通过 mysqlnd_ms 配置文件中
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约定的群组名称建立的。
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</p>
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</dd>
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</dl>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.mysqlnd-ms-get-last-gtid-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功返回 GTID，失败返回 <strong><code>FALSE</code></strong>。
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</p>
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<p class="para">
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函数通过配置文件中 <em>global_transaction_id_injection</em>
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章节定义的 <em>fetch_last_gtid</em> 参数来获取 GTID。
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</p>
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<p class="para">
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在函数调用的时候，GTID 可能已经增加了。
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</p>
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</div>
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<div class="refsect1 unknown-returnvaluet" id="refsect1-function.mysqlnd-ms-get-last-gtid-unknown-returnvaluet">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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函数需要 PHP >= 5.4.0 版本，PECL/mysqlnd_ms >= 1.2.0 版本，在 PHP 5.3
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版本中 <em>mysqlnd</em> 库不能使用。
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 examples" id="refsect1-function.mysqlnd-ms-get-last-gtid-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-2270">
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<p><strong>Example #1 <span class="function"><strong>mysqlnd_ms_get_last_gtid()</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">/* Open mysqlnd_ms connection using mysqli, PDO_MySQL or mysql extension */<br /></span><span style="color: #0000BB">$mysqli </span><span style="color: #007700">= new </span><span style="color: #0000BB">mysqli</span><span style="color: #007700">(</span><span style="color: #DD0000">"myapp"</span><span style="color: #007700">, </span><span style="color: #DD0000">"username"</span><span style="color: #007700">, </span><span style="color: #DD0000">"password"</span><span style="color: #007700">, </span><span style="color: #DD0000">"database"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">)<br /> </span><span style="color: #FF8000">/* Of course, your error handling is nicer... */<br /> </span><span style="color: #007700">die(</span><span style="color: #0000BB">sprintf</span><span style="color: #007700">(</span><span style="color: #DD0000">"[%d] %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_connect_errno</span><span style="color: #007700">(), </span><span style="color: #0000BB">mysqli_connect_error</span><span style="color: #007700">()));<br /><br /></span><span style="color: #FF8000">/* auto commit mode, transaction on master, GTID must be incremented */<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"DROP TABLE IF EXISTS test"</span><span style="color: #007700">))<br /> die(</span><span style="color: #0000BB">sprintf</span><span style="color: #007700">(</span><span style="color: #DD0000">"[%d] %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">errno</span><span style="color: #007700">, </span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">error</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"GTID after transaction %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqlnd_ms_get_last_gtid</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">/* auto commit mode, transaction on master, GTID must be incremented */<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"CREATE TABLE test(id INT)"</span><span style="color: #007700">))<br /> die(</span><span style="color: #0000BB">sprintf</span><span style="color: #007700">(</span><span style="color: #DD0000">"[%d] %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">errno</span><span style="color: #007700">, </span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">error</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"GTID after transaction %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqlnd_ms_get_last_gtid</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysqli</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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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mysqlnd-ms-get-last-gtid-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">
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<a href="mysqlnd_ms.gtid.html" class="link">Global Transaction IDs</a>
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</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> |