Initial commit，修正

vendor/yiisoft/yii2/db/ExpressionBuilder.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * @link https://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license https://www.yiiframework.com/license/
+ */
+
+namespace yii\db;
+
+/**
+ * Class ExpressionBuilder builds objects of [[yii\db\Expression]] class.
+ *
+ * @author Dmitry Naumenko <d.naumenko.a@gmail.com>
+ * @since 2.0.14
+ */
+class ExpressionBuilder implements ExpressionBuilderInterface
+{
+    use ExpressionBuilderTrait;
+
+
+    /**
+     * {@inheritdoc}
+     * @param Expression|ExpressionInterface $expression the expression to be built
+     */
+    public function build(ExpressionInterface $expression, array &$params = [])
+    {
+        $params = array_merge($params, $expression->params);
+        return $expression->__toString();
+    }
+}