throws Exception
{
TypeRegistry typeRegistry = new TypeRegistry();
typeRegistry.addType(new ClassifierType());
typeRegistry.addType(new RegressorType());
typeRegistry.addType(new ModelType());
metadata.addFunctions(new MLFunctionFactory(typeRegistry).listFunctions());
InternalAggregationFunction aggregation = metadata.getExactFunction(new Signature("evaluate_classifier_predictions", StandardTypes.VARCHAR, StandardTypes.BIGINT, StandardTypes.BIGINT)).getAggregationFunction();
Accumulator accumulator = aggregation.bind(ImmutableList.of(0, 1), Optional.<Integer>absent(), Optional.<Integer>absent(), 1.0).createAccumulator();
accumulator.addInput(getPage());
Block block = accumulator.evaluateFinal();