<?php namespace CodeIgniter\Database\SQLite3;

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014-2019 British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package    CodeIgniter
 * @author     CodeIgniter Dev Team
 * @copyright  2014-2019 British Columbia Institute of Technology (https://bcit.ca/)
 * @license    https://opensource.org/licenses/MIT	MIT License
 * @link       https://codeigniter.com
 * @since      Version 3.0.0
 * @filesource
 */

use CodeIgniter\Database\BaseBuilder;

/**
 * Builder for SQLite3
 */
class Builder extends BaseBuilder
{

	/**
	 * Identifier escape character
	 *
	 * @var string
	 */
	protected $escapeChar = '`';

	/**
	 * Default installs of SQLite typically do not
	 * support limiting delete clauses.
	 *
	 * @var boolean
	 */
	protected $canLimitDeletes = false;

	/**
	 * Default installs of SQLite do no support
	 * limiting update queries in combo with WHERE.
	 *
	 * @var boolean
	 */
	protected $canLimitWhereUpdates = false;

	//--------------------------------------------------------------------

	/**
	 * Replace statement
	 *
	 * Generates a platform-specific replace string from the supplied data
	 *
	 * @param string    the table name
	 * @param array     the insert keys
	 * @param array     the insert values
	 *
	 * @return string
	 */
	protected function _replace($table, $keys, $values)
	{
		return 'INSERT OR ' . parent::_replace($table, $keys, $values);
	}

	//--------------------------------------------------------------------

	/**
	 * Truncate statement
	 *
	 * Generates a platform-specific truncate string from the supplied data
	 *
	 * If the database does not support the TRUNCATE statement,
	 * then this method maps to 'DELETE FROM table'
	 *
	 * @param  string $table
	 * @return string
	 */
	protected function _truncate($table)
	{
		return 'DELETE FROM ' . $table;
	}

	//--------------------------------------------------------------------

}