Drill - Hive UDAF Support

[Siva B]

Hi Team,
I am trying to use Hive Custom UDAF (which extentds 
org.apache.hadoop.hive.ql.udf.generic.AbstractGenericUDAFResolver class) in 
Drill. But I am getting error like "No match found for function signature 
function_name". I am able to use Hive custom UDF (which extends 
org.apache.hadoop.hive.ql.exec.UDF) function successfully, but the UDAF is not 
working.
Please let me know about the workaround to use Hive UDAF.
Thanks,Siva