Fix collation for OSKA DB tables (was very slow in production).

migrations/003_fix_collation.php

+<?php
+
+class FixCollation extends Migration
+{
+    public function description()
+    {
+        return 'fix collation for OSKA tables';
+    }
+
+    public function up()
+    {
+        $db = DBManager::get();
+
+        $sql = 'ALTER TABLE oska_mentors
+                CHANGE user_id user_id VARCHAR(32) COLLATE latin1_bin NOT NULL,
+                CHANGE teacher teacher TINYINT(1) NOT NULL DEFAULT 0';
+        $db->exec($sql);
+
+        $sql = 'ALTER TABLE oska_mentees
+                CHANGE user_id user_id VARCHAR(32) COLLATE latin1_bin NOT NULL';
+        $db->exec($sql);
+
+        $sql = 'ALTER TABLE oska_matches
+                CHANGE mentor_id mentor_id VARCHAR(32) COLLATE latin1_bin NOT NULL,
+                CHANGE mentee_id mentee_id VARCHAR(32) COLLATE latin1_bin NOT NULL';
+        $db->exec($sql);
+    }
+
+    public function down()
+    {
+    }
+}

plugin.manifest

 pluginclassname=OSKA
 pluginname=OSKA
 origin=virtUOS
-version=1.0.8
+version=1.0.9
 studipMinVersion=4.0
 studipMaxVersion=4.6.99
 category=Kommunikation und Zusammenarbeit