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<title>ROLLBACK PREPARED</title>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en">
<a name="sql-rollback-prepared"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2>Name</h2>
<p>ROLLBACK PREPARED — cancel a transaction that was earlier prepared for two-phase commit</p>
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<a name="id782015"></a><div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">ROLLBACK PREPARED <em class="replaceable"><code>transaction_id</code></em></pre>
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<div class="refsect1" lang="en">
<a name="id782037"></a><h2>Description</h2>
<p> <code class="command">ROLLBACK PREPARED</code> rolls back a transaction that is in
prepared state.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id782051"></a><h2>Parameters</h2>
<div class="variablelist"><dl>
<dt><span class="term"><em class="replaceable"><code>transaction_id</code></em></span></dt>
<dd><p> The transaction identifier of the transaction that is to be
rolled back.
</p></dd>
</dl></div>
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<div class="refsect1" lang="en">
<a name="id782070"></a><h2>Notes</h2>
<p> To roll back a prepared transaction, you must be either the same user that
executed the transaction originally, or a superuser. But you do not
have to be in the same session that executed the transaction.
</p>
<p> This command cannot be executed inside a transaction block. The prepared
transaction is rolled back immediately.
</p>
<p> All currently available prepared transactions are listed in the
<code class="structname">pg_prepared_xacts</code> system view.
</p>
</div>
<div class="refsect1" lang="en">
<a name="sql-rollback-prepared-examples"></a><h2>Examples</h2>
<p> Roll back the transaction identified by the transaction
identifier <code class="literal">foobar</code>:
</p>
<pre class="programlisting">ROLLBACK PREPARED 'foobar';</pre>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id782124"></a><h2>See Also</h2>
<span class="simplelist"><a href="sql-prepare-transaction.html">PREPARE TRANSACTION</a>, <a href="sql-commit-prepared.html">COMMIT PREPARED</a></span>
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