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<!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>回滚未提交的事务</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.oci-rollback" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">oci_rollback</h1>
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<p class="verinfo">(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)</p><p class="refpurpose"><span class="refname">oci_rollback</span> — <span class="dc-title">回滚未提交的事务</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.oci-rollback-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>oci_rollback</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>oci_rollback()</strong></span> 回滚 Oracle 连接
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<code class="parameter">connection</code> 上所有未提交的语句。
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</p>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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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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当关闭连接或脚本结束时（看哪个先）事务会自动回卷。需要明确地调用
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<span class="function"><a href="oci_commit.html" class="function">oci_commit()</a></span> 来提交事务，或
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<span class="function"><strong>oci_rollback()</strong></span> 来中止事务。
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</p>
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</p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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在 PHP 5.0.0 之前的版本必须使用 <span class="function"><a href="ocirollback.html" class="function">ocirollback()</a></span>
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替代本函数。该函数名仍然可用，为向下兼容作为
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<span class="function"><strong>oci_rollback()</strong></span> 的别名。不过其已被废弃，不推荐使用。
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</p>
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</p></blockquote>
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<p class="para">
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参见 <span class="function"><a href="oci_commit.html" class="function">oci_commit()</a></span>。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.oci-rollback-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">connection</code></dt>
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<dd>
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<p class="para">
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An Oracle connection identifier, returned by
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<span class="function"><a href="oci_connect.html" class="function">oci_connect()</a></span>, <span class="function"><a href="oci_pconnect.html" class="function">oci_pconnect()</a></span>
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or <span class="function"><a href="oci_new_connect.html" class="function">oci_new_connect()</a></span>.
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</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.oci-rollback-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.oci-rollback-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-2451">
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<p><strong>Example #1 <span class="function"><strong>oci_rollback()</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 /><br /></span><span style="color: #FF8000">// Insert into several tables, rolling back the changes if an error occurs<br /><br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'hr'</span><span style="color: #007700">, </span><span style="color: #DD0000">'welcome'</span><span style="color: #007700">, </span><span style="color: #DD0000">'localhost/XE'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$stid </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"INSERT INTO mysalary (id, name) VALUES (1, 'Chris')"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// The OCI_NO_AUTO_COMMIT flag tells Oracle not to commit the INSERT immediately<br />// Use OCI_DEFAULT as the flag for PHP <= 5.3.1. The two flags are equivalent<br /></span><span style="color: #0000BB">$r </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">OCI_NO_AUTO_COMMIT</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$r</span><span style="color: #007700">) { <br /> </span><span style="color: #0000BB">$e </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">trigger_error</span><span style="color: #007700">(</span><span style="color: #0000BB">htmlentities</span><span style="color: #007700">(</span><span style="color: #0000BB">$e</span><span style="color: #007700">[</span><span style="color: #DD0000">'message'</span><span style="color: #007700">]), </span><span style="color: #0000BB">E_USER_ERROR</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">$stid </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">'INSERT INTO myschedule (startday) VALUES (12)'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$r </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">OCI_NO_AUTO_COMMIT</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$r</span><span style="color: #007700">) { <br /> </span><span style="color: #0000BB">$e </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">oci_rollback</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">); </span><span style="color: #FF8000">// rollback changes to both tables<br /> </span><span style="color: #0000BB">trigger_error</span><span style="color: #007700">(</span><span style="color: #0000BB">htmlentities</span><span style="color: #007700">(</span><span style="color: #0000BB">$e</span><span style="color: #007700">[</span><span style="color: #DD0000">'message'</span><span style="color: #007700">]), </span><span style="color: #0000BB">E_USER_ERROR</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">// Commit the changes to both tables<br /></span><span style="color: #0000BB">$r </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_commit</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">r</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$e </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">trigger_error</span><span style="color: #007700">(</span><span style="color: #0000BB">htmlentities</span><span style="color: #007700">(</span><span style="color: #0000BB">$e</span><span style="color: #007700">[</span><span style="color: #DD0000">'message'</span><span style="color: #007700">]), </span><span style="color: #0000BB">E_USER_ERROR</span><span style="color: #007700">);<br />}<br /><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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<p class="para">
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<div class="example" id="example-2452">
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<p><strong>Example #2 Rolling back to a <em>SAVEPOINT</em> 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 />$stid </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">'UPDATE mytab SET id = 1111'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">OCI_NO_AUTO_COMMIT</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Create the savepoint<br /></span><span style="color: #0000BB">$stid </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">'SAVEPOINT mysavepoint'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">OCI_NO_AUTO_COMMIT</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$stid </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">'UPDATE mytab SET id = 2222'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">OCI_NO_AUTO_COMMIT</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Use an explicit SQL statement to rollback to the savepoint<br /></span><span style="color: #0000BB">$stid </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">'ROLLBACK TO SAVEPOINT mysavepoint'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stid</span><span style="color: #007700">, </span><span style="color: #0000BB">OCI_NO_AUTO_COMMIT</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">oci_commit</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">); </span><span style="color: #FF8000">// mytab now has id of 1111<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 notes" id="refsect1-function.oci-rollback-notes">
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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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Transactions are automatically rolled back when you close the
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connection, or when the script ends, whichever is soonest. You
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need to explicitly call <span class="function"><a href="oci_commit.html" class="function">oci_commit()</a></span> to commit
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the transaction.
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</p>
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<p class="para">
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Any call to <span class="function"><a href="oci_execute.html" class="function">oci_execute()</a></span> that uses
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<strong><code>OCI_COMMIT_ON_SUCCESS</code></strong> mode explicitly or by
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default will commit any previous uncommitted transaction.
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</p>
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<p class="para">
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Any Oracle DDL statement such as <em>CREATE</em>
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or <em>DROP</em> will automatically commit any
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uncommitted transaction.
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</p>
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</p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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In PHP versions before 5.0.0 you must
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use <span class="function"><a href="ocirollback.html" class="function">ocirollback()</a></span>
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instead. 在当前版本中，旧的函数名还可以被使用，但已经被废弃并不建议使用。
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.oci-rollback-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="oci_commit.html" class="function" rel="rdfs-seeAlso">oci_commit()</a> - 提交未执行的事务处理</span></li>
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<li class="member"><span class="function"><a href="oci_execute.html" class="function" rel="rdfs-seeAlso">oci_execute()</a> - 执行一条语句</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> |