CPerfQueryJoin::_parse

function _parse($sql, &$table, &$column, &$const)
{
	$match = array();
	if (preg_match("/^([`"\[\]]{0,1}[a-zA-Z0-9_]+[`"\[\]]{0,1})\.(.+)$/", $sql, $match))
	{
		$table = $match[1];
		$column = $match[2];
		$const = "";
	}
	else
	{
		$table = "";
		$column = "";
		$const = $sql;
	}
}