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

Class RankAggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

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

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

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

All Implemented Interfaces:

Serializable, FunctionDefinition

Direct Known Subclasses:

PercentRankAggFunction

public class RankAggFunction
extends RankLikeAggFunctionBase

built-in rank aggregate function.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.table.planner.functions.aggfunctions.RankLikeAggFunctionBase

lastValues, orderKeyTypes, sequence

Constructor Summary

Constructors

Constructor and Description
RankAggFunction(LogicalType[] orderKeyTypes)

Method Summary

Modifier and Type	Method and Description
Expression[]	accumulateExpressions() Expressions for accumulating the mutable aggregation buffer based on an input row.
UnresolvedReferenceExpression[]	aggBufferAttributes() All fields of the aggregate buffer.
DataType[]	getAggBufferTypes() All types of the aggregate buffer.
Expression[]	initialValuesExpressions() Expressions for initializing empty aggregation buffers.

Methods inherited from class org.apache.flink.table.planner.functions.aggfunctions.RankLikeAggFunctionBase

generateInitLiteral, getResultType, getValueExpression, mergeExpressions, operandCount, orderKeyEqualsExpression, retractExpressions

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

getKind, 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

Constructor Detail

RankAggFunction

public RankAggFunction(LogicalType[] orderKeyTypes)

Method Detail

aggBufferAttributes

public UnresolvedReferenceExpression[] aggBufferAttributes()

Description copied from class: DeclarativeAggregateFunction

All fields of the aggregate buffer.

Specified by:

aggBufferAttributes in class DeclarativeAggregateFunction

getAggBufferTypes

public DataType[] getAggBufferTypes()

Description copied from class: DeclarativeAggregateFunction

All types of the aggregate buffer.

Specified by:

getAggBufferTypes in class DeclarativeAggregateFunction

initialValuesExpressions

public Expression[] initialValuesExpressions()

Description copied from class: DeclarativeAggregateFunction

Expressions for initializing empty aggregation buffers.

Specified by:

initialValuesExpressions in class DeclarativeAggregateFunction

accumulateExpressions

public Expression[] accumulateExpressions()

Description copied from class: DeclarativeAggregateFunction

Expressions for accumulating the mutable aggregation buffer based on an input row.

Specified by:

accumulateExpressions in class DeclarativeAggregateFunction