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UDF with Variable length of arguments are not working in Impala, Any alternative solution?


Below UDF works fine with Hive, but with Impala we are not able create function,

it give following error:

SQL Error [500051] [HY000]: [Cloudera][ImpalaJDBCDriver](500051) ERROR processing query/statement. Error Code: 0, SQL state: TStatus(statusCode:ERROR_STATUS, sqlState:HY000, errorMessage:CatalogException: No compatible function signatures found


public class SumCols extends UDF {

	public double evaluate(Text... string) {
		double d = 0.0;
		for (Text s : string) {
			String str = s.toString();
			if (str != null)
				d += Double.parseDouble(str.toString());
		return d;



I believe it is because of Variable length of arguments Text... 

I am looking for its alternate solution in Impala.




Super Collaborator

Hi @HareshAmin ,


As per the below documentation it looks like Hive UDF's are not supported in Impala.

Please refer the documentation:



Chethan YM

Community Manager

@HareshAmin Has the reply helped resolve your issue? If so, please mark the appropriate reply as the solution, as it will make it easier for others to find the answer in the future.  


Vidya Sargur,
Community Manager

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