public function dropForeignKey(string $table, string $foreign_name)
	{
		$sql = sprintf($this->dropConstraintStr, $this->db->escapeIdentifiers($this->db->DBPrefix . $table),
			$this->db->escapeIdentifiers($this->db->DBPrefix . $foreign_name));

		if ($sql === false)
		{
			if ($this->db->DBDebug)
			{
				throw new DatabaseException('This feature is not available for the database you are using.');
			}

			return false;
		}

		return $this->db->query($sql);
	}