def quote_identifier(identifier, for_grants=False):
    r'''
    Return an identifier name (column, table, database, etc) escaped for MySQL

    This means surrounded by "`" character and escaping this character inside.
    It also means doubling the '%' character for MySQLdb internal usage.

    :param identifier: the table, column or database identifier

    :param for_grants: is False by default, when using database names on grant
     queries you should set it to True to also escape "_" and "%" characters as
     requested by MySQL. Note that theses characters should only be escaped when
     requesting grants on the database level (`my\_\%db`.*) but not for table
     level grants (`my_%db`.`foo`)

    CLI Example:

    .. code-block:: bash

        salt '*' mysql.quote_identifier 'foo`bar'
    '''
    if for_grants:
        return '`' + identifier.replace('`', '``').replace('_', r'\_') \
            .replace('%', r'%%') + '`'
    else:
        return '`' + identifier.replace('`', '``').replace('%', '%%') + '`'
r'''
    Return an identifier name (column, table, database, etc) escaped for MySQL

    This means surrounded by "`" character and escaping this character inside.
    It also means doubling the '%' character for MySQLdb internal usage.

    :param identifier: the table, column or database identifier

    :param for_grants: is False by default, when using database names on grant
     queries you should set it to True to also escape "_" and "%" characters as
     requested by MySQL. Note that theses characters should only be escaped when
     requesting grants on the database level (`my\_\%db`.*) but not for table
     level grants (`my_%db`.`foo`)

    CLI Example:

    .. code-block:: bash

        salt '*' mysql.quote_identifier 'foo`bar'