Group.<OuterAggregate>globally() .aggregateFields(field1Selector, Sum.ofLongs(), "field1_sum") .aggregateFields(field3Selector, Sum.ofIntegers(), "field3_sum") .aggregateFields(field1Selector, Top.largestLongsFn(1), "field1_top")); Schema aggregateSchema = Schema.builder()
/** * Build up an aggregation function over the input elements. * * <p>This method specifies an aggregation over multiple fields of the input. The union of all * calls to aggregateField and aggregateFields will determine the output schema. * * <p>Field types in the output schema will be inferred from the provided combine function. * Sometimes the field type cannot be inferred due to Java's type erasure. In that case, use the * overload that allows setting the output field type explicitly. */ public <CombineInputT, AccumT, CombineOutputT> CombineFieldsGlobally<InputT> aggregateFields( List<String> inputFieldNames, CombineFn<CombineInputT, AccumT, CombineOutputT> fn, String outputFieldName) { return aggregateFields( FieldAccessDescriptor.withFieldNames(inputFieldNames), fn, outputFieldName); }
public <CombineInputT, AccumT, CombineOutputT> CombineFieldsGlobally<InputT> aggregateFieldsById( List<Integer> inputFieldIds, CombineFn<CombineInputT, AccumT, CombineOutputT> fn, Field outputField) { return aggregateFields(FieldAccessDescriptor.withFieldIds(inputFieldIds), fn, outputField); }
/** * Build up an aggregation function over the input elements. * * <p>This method specifies an aggregation over multiple fields of the input. The union of all * calls to aggregateField and aggregateFields will determine the output schema. */ public <CombineInputT, AccumT, CombineOutputT> CombineFieldsGlobally<InputT> aggregateFields( List<String> inputFieldNames, CombineFn<CombineInputT, AccumT, CombineOutputT> fn, Field outputField) { return aggregateFields( FieldAccessDescriptor.withFieldNames(inputFieldNames), fn, outputField); }
public <CombineInputT, AccumT, CombineOutputT> CombineFieldsGlobally<InputT> aggregateFieldsById( List<Integer> inputFieldIds, CombineFn<CombineInputT, AccumT, CombineOutputT> fn, String outputFieldName) { return aggregateFields( FieldAccessDescriptor.withFieldIds(inputFieldIds), fn, outputFieldName); }