Revert "改名"

This reverts commit fdf58326

Mysql/Schema.php

@@ -0,0 +1,36 @@
+<?php
+declare(strict_types=1);
+namespace Database\Mysql;
+
+
+use Exception;
+use Kiri\Abstracts\Component;
+use Database\Connection;
+
+/**
+ * Class Schema
+ * @package Database\Mysql
+ */
+class Schema extends Component
+{
+
+	/** @var ?Connection */
+	public ?Connection $db = null;
+
+	/** @var ?Columns $_column*/
+	private ?Columns $_column = null;
+
+
+	/**
+	 * @return Columns|null
+	 * @throws Exception
+	 */
+	public function getColumns(): ?Columns
+	{
+		if ($this->_column === null) {
+			$this->_column = new Columns(['db' => $this->db]);
+		}
+
+		return $this->_column;
+	}
+}