<?php
/* $Id$ */
namespace Mammut\DB\Sql\Dialect;

(defined('MAMMUT') && (basename(__FILE__) != basename($_SERVER['PHP_SELF']))) or die('ACCESS DENIED');

use Mammut\DB\DB;
/**
 * 
 * @author Stefan Daurer <s.daurer@q-spot.org>
 * @package Mammut\DB\Dialect
 */
class Db2 extends Sql92 implements iDialect {
	protected $identSeparator = '.';

	public function __construct($identSeparator = '.') {
		$this->$identSeparator = $identSeparator;
	}

	public function getName() {
		return DB::DIALECT_DB2;
	}

	public function isOffsetSupported() {
		return true;
	}

	public function getDdl() {
		if(!is_null($this->ddlInstance))
			return $this->ddlInstance;
		$name = '\\' . self::clazz() . 'Ddl';
		$this->ddlInstance = new \Mammut\DB\Sql\Dialect\Ddl\Db2Ddl($this->con);
		return $this->ddlInstance;
	}
	
	public function quoteIdent($identifier) {
		if($this->quoteIdentifiers === false)
			return $identifier;
		return parent::quoteIdent($identifier);
	}

	public function quoteValue($value) {
		if(function_exists('db2_escape_string')) {
			return '\'' . db2_escape_string($value) . '\'';
		}
		return '\'' . str_replace("'", "''", $value) . '\'';
	}

	public function escapeString($value) {
		if(function_exists('db2_escape_string'))
			return db2_escape_string($value);
		return str_replace("'", "''", $value);
	}
}