Package org.apache.flink.table.planner.functions.aggfunctions

Class AvgAggFunction

java.lang.Object
org.apache.flink.table.functions.UserDefinedFunction
org.apache.flink.table.functions.DeclarativeAggregateFunction
org.apache.flink.table.planner.functions.aggfunctions.AvgAggFunction
All Implemented Interfaces:
Serializable, org.apache.flink.table.functions.FunctionDefinition
Direct Known Subclasses:
AvgAggFunction.ByteAvgAggFunction, AvgAggFunction.DecimalAvgAggFunction, AvgAggFunction.DoubleAvgAggFunction, AvgAggFunction.FloatAvgAggFunction, AvgAggFunction.IntAvgAggFunction, AvgAggFunction.LongAvgAggFunction, AvgAggFunction.ShortAvgAggFunction
public abstract class AvgAggFunction extends org.apache.flink.table.functions.DeclarativeAggregateFunction
built-in avg aggregate function.
See Also:

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static class 
    AvgAggFunction.ByteAvgAggFunction
    Built-in Byte Avg aggregate function.
    static class 
    AvgAggFunction.DecimalAvgAggFunction
    Built-in Decimal Avg aggregate function.
    static class 
    AvgAggFunction.DoubleAvgAggFunction
    Built-in Double Avg aggregate function.
    static class 
    AvgAggFunction.FloatAvgAggFunction
    Built-in Float Avg aggregate function.
    static class 
    AvgAggFunction.IntAvgAggFunction
    Built-in Integer Avg aggregate function.
    static class 
    AvgAggFunction.LongAvgAggFunction
    Built-in Long Avg aggregate function.
    static class 
    AvgAggFunction.ShortAvgAggFunction
    Built-in Short Avg aggregate function.

  • Constructor Summary

    Constructors
    Constructor
    Description
    AvgAggFunction()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    org.apache.flink.table.expressions.Expression[]
    accumulateExpressions()
     
    protected org.apache.flink.table.expressions.UnresolvedCallExpression
    adjustedMinus(org.apache.flink.table.expressions.UnresolvedReferenceExpression arg1, org.apache.flink.table.expressions.UnresolvedReferenceExpression arg2)
     
    protected org.apache.flink.table.expressions.UnresolvedCallExpression
    adjustedPlus(org.apache.flink.table.expressions.UnresolvedReferenceExpression arg1, org.apache.flink.table.expressions.UnresolvedReferenceExpression arg2)
     
    org.apache.flink.table.expressions.UnresolvedReferenceExpression[]
    aggBufferAttributes()
     
    org.apache.flink.table.types.DataType[]
    getAggBufferTypes()
     
    abstract org.apache.flink.table.types.DataType
    getSumType()
     
    org.apache.flink.table.expressions.Expression
    getValueExpression()
    If all input are nulls, count will be 0 and we will get null after the division.
    org.apache.flink.table.expressions.Expression[]
    initialValuesExpressions()
     
    org.apache.flink.table.expressions.Expression[]
    mergeExpressions()
     
    int
    operandCount()
     
    org.apache.flink.table.expressions.Expression[]
    retractExpressions()
     

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

    getKind, getResultType, getTypeInference, mergeOperand, mergeOperands, operand, operands

    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

    getRequirements, isDeterministic, supportsConstantFolding

  • Constructor Details

    • AvgAggFunction

      public AvgAggFunction()

  • Method Details

    • getSumType

      public abstract org.apache.flink.table.types.DataType getSumType()

    • operandCount

      public int operandCount()
      Specified by:
      operandCount in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • aggBufferAttributes

      public org.apache.flink.table.expressions.UnresolvedReferenceExpression[] aggBufferAttributes()
      Specified by:
      aggBufferAttributes in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • getAggBufferTypes

      public org.apache.flink.table.types.DataType[] getAggBufferTypes()
      Specified by:
      getAggBufferTypes in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • initialValuesExpressions

      public org.apache.flink.table.expressions.Expression[] initialValuesExpressions()
      Specified by:
      initialValuesExpressions in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • accumulateExpressions

      public org.apache.flink.table.expressions.Expression[] accumulateExpressions()
      Specified by:
      accumulateExpressions in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • retractExpressions

      public org.apache.flink.table.expressions.Expression[] retractExpressions()
      Specified by:
      retractExpressions in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • mergeExpressions

      public org.apache.flink.table.expressions.Expression[] mergeExpressions()
      Specified by:
      mergeExpressions in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • getValueExpression

      public org.apache.flink.table.expressions.Expression getValueExpression()
      If all input are nulls, count will be 0 and we will get null after the division.
      Specified by:
      getValueExpression in class org.apache.flink.table.functions.DeclarativeAggregateFunction

    • adjustedPlus

      protected org.apache.flink.table.expressions.UnresolvedCallExpression adjustedPlus(org.apache.flink.table.expressions.UnresolvedReferenceExpression arg1, org.apache.flink.table.expressions.UnresolvedReferenceExpression arg2)

    • adjustedMinus

      protected org.apache.flink.table.expressions.UnresolvedCallExpression adjustedMinus(org.apache.flink.table.expressions.UnresolvedReferenceExpression arg1, org.apache.flink.table.expressions.UnresolvedReferenceExpression arg2)