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<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/sql-reference/transactions.adoc" target="_blank">Edit</a>
<h1>Transactions</h1>
<div id="preamble">
<div class="sectionbody">
<div class="admonitionblock important">
<table>
<tr>
<td class="icon">
<div class="title">Important</div>
</td>
<td class="content">
Support for <a href="/docs/latest/transactions/mvcc">SQL transactions</a> is currently in the beta stage. For production use, consider key-value transactions.
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>Ignite supports the following statements that allow users to start, commit, or rollback a transaction.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="sql"><span class="k">BEGIN</span> <span class="p">[</span><span class="n">TRANSACTION</span><span class="p">]</span>
<span class="k">COMMIT</span> <span class="p">[</span><span class="n">TRANSACTION</span><span class="p">]</span>
<span class="k">ROLLBACK</span> <span class="p">[</span><span class="n">TRANSACTION</span><span class="p">]</span></code></pre>
</div>
</div>
<div class="ulist">
<ul>
<li>
<p>The <code>BEGIN</code> statement begins a new transaction.</p>
</li>
<li>
<p><code>COMMIT</code> commits the current transaction.</p>
</li>
<li>
<p><code>ROLLBACK</code> rolls back the current transaction.</p>
</li>
</ul>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
DDL statements are not supported inside transactions.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="description">Description</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The <code>BEGIN</code>, <code>COMMIT</code> and <code>ROLLBACK</code> commands allow you to manage SQL Transactions. A transaction is a sequence of SQL operations that starts with the <code>BEGIN</code> statement and ends with the <code>COMMIT</code> statement. Either all of the operations in a transaction succeed or they all fail.</p>
</div>
<div class="paragraph">
<p>The <code>ROLLBACK [TRANSACTION]</code> statement undoes all updates made since the last time a <code>COMMIT</code> or <code>ROLLBACK</code> command was issued.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="example">Example</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Add a person and update the city population by 1 in a single transaction.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="sql"><span class="k">BEGIN</span><span class="p">;</span>
<span class="k">INSERT</span> <span class="k">INTO</span> <span class="n">Person</span> <span class="p">(</span><span class="n">id</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">city_id</span><span class="p">)</span> <span class="k">VALUES</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s1">'John Doe'</span><span class="p">,</span> <span class="mi">3</span><span class="p">);</span>
<span class="k">UPDATE</span> <span class="n">City</span> <span class="k">SET</span> <span class="n">population</span> <span class="o">=</span> <span class="n">population</span> <span class="o">+</span> <span class="mi">1</span> <span class="k">WHERE</span> <span class="n">id</span> <span class="o">=</span> <span class="mi">3</span><span class="p">;</span>
<span class="k">COMMIT</span><span class="p">;</span></code></pre>
</div>
</div>
<div class="paragraph">
<p>Roll back the changes made by the previous commands.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="sql"><span class="k">BEGIN</span><span class="p">;</span>
<span class="k">INSERT</span> <span class="k">INTO</span> <span class="n">Person</span> <span class="p">(</span><span class="n">id</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">city_id</span><span class="p">)</span> <span class="k">VALUES</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s1">'John Doe'</span><span class="p">,</span> <span class="mi">3</span><span class="p">);</span>
<span class="k">UPDATE</span> <span class="n">City</span> <span class="k">SET</span> <span class="n">population</span> <span class="o">=</span> <span class="n">population</span> <span class="o">+</span> <span class="mi">1</span> <span class="k">WHERE</span> <span class="n">id</span> <span class="o">=</span> <span class="mi">3</span><span class="p">;</span></code></pre>
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inputSelector: '#search-input',
// algoliaOptions: { 'facetFilters': ["version:$VERSION"] },
// Set debug to true to inspect the dropdown
debug: false,
});
</script>
<script type='module' src='/assets/js/index.js?1609302724' async crossorigin></script>
<script type='module' src='/assets/js/versioning.js?1609302724' async crossorigin></script>
</body>
</html>