Huge support_assigned table and WSOD on administrator ticket update
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #1256500. -->
Reported by: [rbayliss](https://www.drupal.org/user/772738)
>>>
<p>Our support_assigned table has gotten out of control. It's currently at 2.5 million records and counting. We've also been getting reports of administrators getting a WSOD on support ticket update. After doing some digging in the code, I found the following snippet in support_comment():</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #007700">if (</span><span style="color: #0000BB">user_access</span><span style="color: #007700">(</span><span style="color: #DD0000">'administer support'</span><span style="color: #007700">) && (!isset(</span><span style="color: #0000BB">$comment</span><span style="color: #007700">[</span><span style="color: #DD0000">'support_email'</span><span style="color: #007700">]) || !</span><span style="color: #0000BB">$comment</span><span style="color: #007700">[</span><span style="color: #DD0000">'support_email'</span><span style="color: #007700">])) {<br> if (isset(</span><span style="color: #0000BB">$comment</span><span style="color: #007700">[</span><span style="color: #DD0000">'subscribed-users'</span><span style="color: #007700">]) &&<br> !empty(</span><span style="color: #0000BB">$comment</span><span style="color: #007700">[</span><span style="color: #DD0000">'subscribed-users'</span><span style="color: #007700">])) {<br> </span><span style="color: #0000BB">$array </span><span style="color: #007700">= </span><span style="color: #0000BB">drupal_explode_tags</span><span style="color: #007700">(</span><span style="color: #0000BB">$comment</span><span style="color: #007700">[</span><span style="color: #DD0000">'subscribed-users'</span><span style="color: #007700">]);<br> foreach (</span><span style="color: #0000BB">$array </span><span style="color: #007700">as </span><span style="color: #0000BB">$name</span><span style="color: #007700">) {<br> </span><span style="color: #0000BB">$uid </span><span style="color: #007700">= </span><span style="color: #0000BB">db_result</span><span style="color: #007700">(</span><span style="color: #0000BB">db_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT uid FROM {users} WHERE name = '%s'"</span><span style="color: #007700">, </span><span style="color: #0000BB">$name</span><span style="color: #007700">));<br> </span><span style="color: #0000BB">$comment</span><span style="color: #007700">[</span><span style="color: #DD0000">"notify-</span><span style="color: #0000BB">$uid</span><span style="color: #DD0000">"</span><span style="color: #007700">] = </span><span style="color: #0000BB">1</span><span style="color: #007700">;<br> }<br> }<br> </span><span style="color: #0000BB">$available </span><span style="color: #007700">= </span><span style="color: #0000BB">_support_assigned</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">$node</span><span style="color: #007700">);<br> foreach (</span><span style="color: #0000BB">$available </span><span style="color: #007700">as </span><span style="color: #0000BB">$uid </span><span style="color: #007700">=> </span><span style="color: #0000BB">$name</span><span style="color: #007700">) {<br> if (!</span><span style="color: #0000BB">$uid </span><span style="color: #007700">|| </span><span style="color: #0000BB">$user</span><span style="color: #007700">-></span><span style="color: #0000BB">uid </span><span style="color: #007700">== </span><span style="color: #0000BB">$uid</span><span style="color: #007700">) continue;<br> </span><span style="color: #0000BB">support_subscribe_user</span><span style="color: #007700">(</span><span style="color: #0000BB">$node</span><span style="color: #007700">-></span><span style="color: #0000BB">nid</span><span style="color: #007700">, </span><span style="color: #0000BB">$uid</span><span style="color: #007700">, </span><span style="color: #0000BB">$comment</span><span style="color: #007700">[</span><span style="color: #DD0000">"notify-</span><span style="color: #0000BB">$uid</span><span style="color: #DD0000">"</span><span style="color: #007700">]);<br> }<br>}<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>The problem is the _support_assigned() returns every single user in the system. This means every time an administrator updates a ticket, a record is written to the support_assigned table for every single user in the system. What's worse is that the active value is 0, so they're not really even subscribed (see <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/support/-/work_items/973358" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/support/-/work_items/973358</a></span>). This bug is an issue even in the latest dev version of the module. </p>
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