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

Class FirstValueAggFunction<T>

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<T,org.apache.flink.table.data.RowData>
org.apache.flink.table.runtime.functions.aggregate.FirstValueAggFunction<T>
All Implemented Interfaces:
Serializable, org.apache.flink.table.functions.FunctionDefinition
@Internal public final class FirstValueAggFunction<T> extends BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>
Built-in FIRST_VALUE aggregate function.
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    FirstValueAggFunction(org.apache.flink.table.types.logical.LogicalType valueType)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    accumulate(org.apache.flink.table.data.RowData rowData, Object value)
     
    void
    accumulate(org.apache.flink.table.data.RowData rowData, Object value, Long order)
     
    void
    accumulate(org.apache.flink.table.data.RowData rowData, org.apache.flink.table.data.StringData value)
     
    void
    accumulate(org.apache.flink.table.data.RowData rowData, org.apache.flink.table.data.StringData value, Long order)
     
    org.apache.flink.table.data.RowData
    createAccumulator()
     
    org.apache.flink.table.types.DataType
    getAccumulatorDataType()
     
    List<org.apache.flink.table.types.DataType>
    getArgumentDataTypes()
     
    org.apache.flink.table.types.DataType
    getOutputDataType()
     
    T
    getValue(org.apache.flink.table.data.RowData acc)
     
    boolean
    isDeterministic()
     
    void
    resetAccumulator(org.apache.flink.table.data.RowData rowData)
     

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

    getRequirements, getTypeInference

    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

    Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

    supportsConstantFolding

  • Constructor Details

    • FirstValueAggFunction

      public FirstValueAggFunction(org.apache.flink.table.types.logical.LogicalType valueType)

  • Method Details

    • getArgumentDataTypes

      public List<org.apache.flink.table.types.DataType> getArgumentDataTypes()
      Overrides:
      getArgumentDataTypes in class BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>

    • getAccumulatorDataType

      public org.apache.flink.table.types.DataType getAccumulatorDataType()
      Overrides:
      getAccumulatorDataType in class BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>

    • getOutputDataType

      public org.apache.flink.table.types.DataType getOutputDataType()
      Overrides:
      getOutputDataType in class BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>

    • isDeterministic

      public boolean isDeterministic()
      Specified by:
      isDeterministic in interface org.apache.flink.table.functions.FunctionDefinition
      Overrides:
      isDeterministic in class BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>

    • createAccumulator

      public org.apache.flink.table.data.RowData createAccumulator()
      Specified by:
      createAccumulator in class org.apache.flink.table.functions.ImperativeAggregateFunction<T,org.apache.flink.table.data.RowData>

    • accumulate

      public void accumulate(org.apache.flink.table.data.RowData rowData, Object value)

    • accumulate

      public void accumulate(org.apache.flink.table.data.RowData rowData, Object value, Long order)

    • accumulate

      public void accumulate(org.apache.flink.table.data.RowData rowData, org.apache.flink.table.data.StringData value)

    • accumulate

      public void accumulate(org.apache.flink.table.data.RowData rowData, org.apache.flink.table.data.StringData value, Long order)

    • resetAccumulator

      public void resetAccumulator(org.apache.flink.table.data.RowData rowData)

    • getValue

      public T getValue(org.apache.flink.table.data.RowData acc)
      Specified by:
      getValue in class org.apache.flink.table.functions.AggregateFunction<T,org.apache.flink.table.data.RowData>