Fixed a corner case bug in mf_predict
Closed this issue · 1 comments
myui commented
mf_predict UDF should be GenericUDF to cope with this issue.
hive> select mf_predict(null,null,0.0,0.0);0.0
select mf_predict(null,null,0.0,null);FAILED: SemanticException [Error 10014]: Line 1:7 Wrong arguments 'TOK_NULL': org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute method public org.apache.hadoop.io.FloatWritable hivemall.mf.MFPredictionUDF.evaluate(java.util.List,java.util.List,double,double) throws org.apache.hadoop.hive.ql.metadata.HiveException on object hivemall.mf.MFPredictionUDF of class hivemall.mf.MFPredictionUDF with arguments {null, null, 0.0:java.lang.Double, null} of size 4