def decode_mysql_string_literal(text):
    """
    Removes quotes and decodes escape sequences from given MySQL string literal
    returning the result.

    :param text: MySQL string literal, with the quotes still included.
    :type text: str

    :return: Given string literal with quotes removed and escape sequences
             decoded.
    :rtype: str
    """
    assert text.startswith("'")
    assert text.endswith("'")

    # Ditch quotes from the string literal.
    text = text[1:-1]

    return MYSQL_STRING_ESCAPE_SEQUENCE_PATTERN.sub(
        unescape_single_character,
        text,
    )
Removes quotes and decodes escape sequences from given MySQL string literal
    returning the result.

    :param text: MySQL string literal, with the quotes still included.
    :type text: str

    :return: Given string literal with quotes removed and escape sequences
             decoded.
    :rtype: str