Initial commit，修正

vendor/yiisoft/yii2/db/IndexConstraint.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * @link https://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license https://www.yiiframework.com/license/
+ */
+
+namespace yii\db;
+
+/**
+ * IndexConstraint represents the metadata of a table `INDEX` constraint.
+ *
+ * @author Sergey Makinen <sergey@makinen.ru>
+ * @since 2.0.13
+ */
+class IndexConstraint extends Constraint
+{
+    /**
+     * @var bool whether the index is unique.
+     */
+    public $isUnique;
+    /**
+     * @var bool whether the index was created for a primary key.
+     */
+    public $isPrimary;
+}