Kohana v3.3.0

modules/database/classes/Kohana/Database/Query/Builder/Delete.php

@@ -0,0 +1,99 @@
+<?php defined('SYSPATH') OR die('No direct script access.');
+/**
+ * Database query builder for DELETE statements. See [Query Builder](/database/query/builder) for usage and examples.
+ *
+ * @package    Kohana/Database
+ * @category   Query
+ * @author     Kohana Team
+ * @copyright  (c) 2008-2009 Kohana Team
+ * @license    http://kohanaphp.com/license
+ */
+class Kohana_Database_Query_Builder_Delete extends Database_Query_Builder_Where {
+
+	// DELETE FROM ...
+	protected $_table;
+
+	/**
+	 * Set the table for a delete.
+	 *
+	 * @param   mixed  $table  table name or array($table, $alias) or object
+	 * @return  void
+	 */
+	public function __construct($table = NULL)
+	{
+		if ($table)
+		{
+			// Set the inital table name
+			$this->_table = $table;
+		}
+
+		// Start the query with no SQL
+		return parent::__construct(Database::DELETE, '');
+	}
+
+	/**
+	 * Sets the table to delete from.
+	 *
+	 * @param   mixed  $table  table name or array($table, $alias) or object
+	 * @return  $this
+	 */
+	public function table($table)
+	{
+		$this->_table = $table;
+
+		return $this;
+	}
+
+	/**
+	 * Compile the SQL query and return it.
+	 *
+	 * @param   mixed  $db  Database instance or name of instance
+	 * @return  string
+	 */
+	public function compile($db = NULL)
+	{
+		if ( ! is_object($db))
+		{
+			// Get the database instance
+			$db = Database::instance($db);
+		}
+
+		// Start a deletion query
+		$query = 'DELETE FROM '.$db->quote_table($this->_table);
+
+		if ( ! empty($this->_where))
+		{
+			// Add deletion conditions
+			$query .= ' WHERE '.$this->_compile_conditions($db, $this->_where);
+		}
+
+		if ( ! empty($this->_order_by))
+		{
+			// Add sorting
+			$query .= ' '.$this->_compile_order_by($db, $this->_order_by);
+		}
+
+		if ($this->_limit !== NULL)
+		{
+			// Add limiting
+			$query .= ' LIMIT '.$this->_limit;
+		}
+
+		$this->_sql = $query;
+
+		return parent::compile($db);
+	}
+
+	public function reset()
+	{
+		$this->_table = NULL;
+		$this->_where = array();
+
+		$this->_parameters = array();
+
+		$this->_sql = NULL;
+
+		return $this;
+	}
+
+} // End Database_Query_Builder_Delete