Resolve "Mailqueue kaputt"

Closes #1134

Merge request studip/studip!1886

db/migrations/5.1.49_enlarge_mailqueue.php

+<?php
+
+/**
+ * @see https://gitlab.studip.de/studip/studip/-/issues/1134
+ */
+final class EnlargeMailqueue extends Migration
+{
+    public function description()
+    {
+        return 'alters mail_queue_entries.mail to MEDIUMTEXT since TEXT is too short';
+    }
+
+    protected function up()
+    {
+        DBManager::get()->exec("ALTER TABLE `mail_queue_entries` MODIFY `mail` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL");
+    }
+
+    protected function down()
+    {
+        DBManager::get()->exec("ALTER TABLE `mail_queue_entries` MODIFY `mail` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL");
+    }
+
+}