@Override
    public Object parse(SourceData sourceData, int rowIndex, Context context) {
        Object numObj = numParser.parse(sourceData, rowIndex, context);
        if (numObj == null) {
            return null;
        }
        double num = OperatorTools.parseBigDecimal(numObj).doubleValue();
        return Erf.erf(num);
    }
ErfFunction  ->  erf(numeric)
Description:
- Return NULL if 'numeric' is NULL;
- Return the error function value of the input value.
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/arithmetic/ErfFunction.java