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<div class="section" id="bigint-64bit-identifiers">
<h1>BigInt (64bit) identifiers<a class="headerlink" href="#bigint-64bit-identifiers" title="Permalink to this headline">¶</a></h1>
<p>Since Nextcloud 13 big integers are used to store identifiers and auto-increment keys in the database.
Because changing columns on huge tables can take quite a while (up to hours or days), the update from
Nextcloud 12 or earlier did not perform this migration on the filecache and activity table.</p>
<p>To make it easy to force the update on those tables too, we’ve added a console command, which can be used
to migrate the remaining columns to bigints.</p>
<p>The command can safely be executed. It will show a success message when there is nothing to do:</p>
<div class="highlight-python"><div class="highlight"><pre>sudo -u www-data ./occ db:convert-filecache-bigint
All tables already up to date!
</pre></div>
</div>
<p>or otherwise ask for confirmation, before performing the heavy actions:</p>
<div class="highlight-python"><div class="highlight"><pre>sudo -u www-data ./occ db:convert-filecache-bigint
This can take up to hours, depending on the number of files in your instance!
Continue with the conversion (y/n)? [n]
</pre></div>
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<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">Similar to a normal update, you should shutdown your apache or nginx server or enable maintenance
mode before running the command to avoid issues with your sync clients.</p>
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