I write a hive genericUDF class, which returns a decimal value after evaluate.

Here is my UDF code:

public class MyUDF extends GenericUDF {
    @Override
    public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
        if (arguments.length < 1) {
            throw new UDFArgumentException("myUDF() requires at least one argument.");
        }
        return PrimitiveObjectInspectorFactory.getPrimitiveJavaObjectInspector(TypeInfoFactory.getDecimalTypeInfo(10, 2));
    }
    @Override
    public Object evaluate(DeferredObject[] arguments) throws HiveException {
        if (arguments[0] == null) {
            return null;
        }
        int value = (Integer) arguments[0].get();
        // do something
        return HiveDecimal.create(value);
    }

    @Override
    public String getDisplayString(String[] children) {
        return getStandardDisplayString("myUDF", children);
    }
}

when i run this function in hive, it shows error like :

FAILED: RuntimeException Error creating PrimitiveTypeInfo instance for decimal
java.lang.RuntimeException: Error creating PrimitiveTypeInfo instance for decimal
    at org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory.getPrimitiveTypeInfo(TypeInfoFactory.java:111)
    at org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory.getPrimitiveTypeInfoFromJavaPrimitive(TypeInfoFactory.java:190)
    at org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc.(ExprNodeConstantDesc.java:76)
    at org.apache.hadoop.hive.ql.optimizer.ConstantPropagateProcFactory.evaluateFunction(ConstantPropagateProcFactory.java:990)
    at org.apache.hadoop.hive.ql.optimizer.ConstantPropagateProcFactory.foldExprFull(ConstantPropagateProcFactory.java:425)
    at org.apache.hadoop.hive.ql.optimizer.ConstantPropagateProcFactory.foldExpr(ConstantPropagateProcFactory.java:263)
    at org.apache.hadoop.hive.ql.optimizer.ConstantPropagateProcFactory.foldExprFull(ConstantPropagateProcFactory.java:413)
    at org.apache.hadoop.hive.ql.optimizer.ConstantPropagateProcFactory.foldExpr(ConstantPropagateProcFactory.java:263)
    at org.apache.hadoop.hive.ql.optimizer.ConstantPropagateProcFactory.foldExprFull(ConstantPropagateProcFactory.java:413)

I try to read hive2.3 source code. It seems like there is a bug in “org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory.getPrimitiveTypeInfoFromJavaPrimitive”. When i run: TypeInfoFactory.getPrimitiveTypeInfoFromJavaPrimitive(HiveDecimal.class), it shows same error.

So how can i return decimal in generic UDF?