Fix index usage for OauthSessions relation from Account model

common/models/OauthSession.php

@@ -28,6 +28,10 @@ class OauthSession extends ActiveRecord {
         return '{{%oauth_sessions}}';
     }
 
+    public static function find(): OauthSessionQuery {
+        return new OauthSessionQuery(static::class);
+    }
+
     public function behaviors() {
         return [
             [

common/models/OauthSessionQuery.php

@@ -0,0 +1,41 @@
+<?php
+declare(strict_types=1);
+
+namespace common\models;
+
+use yii\db\ActiveQuery;
+
+/**
+ * @see \common\models\OauthSession
+ */
+class OauthSessionQuery extends ActiveQuery {
+
+    /**
+     * The owner_id field in the oauth_sessions table has a string type.
+     * If you try to search using an integer value, the MariaDB will not apply the index, which will cause
+     * a huge rows scan.
+     *
+     * After examining the query builder logic in Yii2, we managed to find a solution to bring the value
+     * that the builder will use to create a link to the string exactly before the construction
+     * and restore the original value afterwards.
+     *
+     * @param $builder
+     * @return ActiveQuery|\yii\db\Query
+     */
+    public function prepare($builder) {
+        $idHasBeenCastedToString = false;
+        if ($this->primaryModel instanceof Account && $this->link === ['owner_id' => 'id']) {
+            $this->primaryModel->id = (string)$this->primaryModel->id;
+            $idHasBeenCastedToString = true;
+        }
+
+        $query = parent::prepare($builder);
+
+        if ($idHasBeenCastedToString) {
+            $this->primaryModel->id = (int)$this->primaryModel->id;
+        }
+
+        return $query;
+    }
+
+}