改名

Database/Mysql/Schema.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace Database\Mysql;
+
+
+use Snowflake\Abstracts\Component;
+use Database\Connection;
+use Database\Orm\Change;
+use Database\Orm\Select;
+
+/**
+ * Class Schema
+ * @package Database\Mysql
+ */
+class Schema extends Component
+{
+
+	/** @var Connection */
+	public $db;
+
+	/** @var Select */
+	private $_builder = null;
+
+	/** @var Columns */
+	private $_column = null;
+
+	/** @var Change */
+	private $_change = null;
+
+	/**
+	 * @return Select
+	 */
+	public function getQueryBuilder()
+	{
+		if ($this->_builder === null) {
+			$this->_builder = new Select();
+		}
+		return $this->_builder;
+	}
+
+	/**
+	 * @return Change
+	 */
+	public function getChange()
+	{
+		if ($this->_change === null) {
+			$this->_change = new Change();
+		}
+		return $this->_change;
+	}
+
+
+	/**
+	 * @return Columns
+	 */
+	public function getColumns()
+	{
+		if ($this->_column === null) {
+			$this->_column = new Columns(['db' => $this->db]);
+		}
+
+		return $this->_column;
+	}
+}