org.apache.flink.table.runtime.functions.aggregate

Class BatchApproxCountDistinctAggFunctions.StringApproxCountDistinctAggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.ImperativeAggregateFunction<T,ACC>

org.apache.flink.table.functions.AggregateFunction<T,ACC>

org.apache.flink.table.runtime.functions.aggregate.BuiltInAggregateFunction<Long,HllBuffer>

org.apache.flink.table.runtime.functions.aggregate.BatchApproxCountDistinctAggFunctions.ApproxCountDistinctAggFunction<org.apache.flink.table.data.binary.BinaryStringData>

org.apache.flink.table.runtime.functions.aggregate.BatchApproxCountDistinctAggFunctions.StringApproxCountDistinctAggFunction

All Implemented Interfaces:

Serializable, org.apache.flink.table.functions.FunctionDefinition

Enclosing class:

BatchApproxCountDistinctAggFunctions

public static class BatchApproxCountDistinctAggFunctions.StringApproxCountDistinctAggFunction
extends BatchApproxCountDistinctAggFunctions.ApproxCountDistinctAggFunction<org.apache.flink.table.data.binary.BinaryStringData>

Built-in string APPROX_COUNT_DISTINCT aggregate function.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
StringApproxCountDistinctAggFunction()

Method Summary

Methods inherited from class org.apache.flink.table.runtime.functions.aggregate.BatchApproxCountDistinctAggFunctions.ApproxCountDistinctAggFunction

accumulate, createAccumulator, getAccumulatorDataType, getArgumentDataTypes, getOutputDataType, getValue, merge, resetAccumulator

Methods inherited from class org.apache.flink.table.runtime.functions.aggregate.BuiltInAggregateFunction

getRequirements, getTypeInference, isDeterministic

Methods inherited from class org.apache.flink.table.functions.AggregateFunction

getKind

Methods inherited from class org.apache.flink.table.functions.ImperativeAggregateFunction

getAccumulatorType, getResultType

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

StringApproxCountDistinctAggFunction

public StringApproxCountDistinctAggFunction()