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

Class SingleValueAggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.DeclarativeAggregateFunction

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

All Implemented Interfaces:

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

Direct Known Subclasses:

SingleValueAggFunction.BooleanSingleValueAggFunction, SingleValueAggFunction.ByteSingleValueAggFunction, SingleValueAggFunction.CharSingleValueAggFunction, SingleValueAggFunction.DateSingleValueAggFunction, SingleValueAggFunction.DecimalSingleValueAggFunction, SingleValueAggFunction.DoubleSingleValueAggFunction, SingleValueAggFunction.FloatSingleValueAggFunction, SingleValueAggFunction.IntSingleValueAggFunction, SingleValueAggFunction.LongSingleValueAggFunction, SingleValueAggFunction.ShortSingleValueAggFunction, SingleValueAggFunction.StringSingleValueAggFunction, SingleValueAggFunction.TimeSingleValueAggFunction, SingleValueAggFunction.TimestampLtzSingleValueAggFunction, SingleValueAggFunction.TimestampSingleValueAggFunction

public abstract class SingleValueAggFunction
extends org.apache.flink.table.functions.DeclarativeAggregateFunction

Base class for built-in single value aggregate function.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	SingleValueAggFunction.BooleanSingleValueAggFunction	Built-in boolean single value aggregate function.
static final class	SingleValueAggFunction.ByteSingleValueAggFunction	Built-in byte single value aggregate function.
static final class	SingleValueAggFunction.CharSingleValueAggFunction	Built-in char single value aggregate function.
static final class	SingleValueAggFunction.DateSingleValueAggFunction	Built-in date single value aggregate function.
static final class	SingleValueAggFunction.DecimalSingleValueAggFunction	Built-in decimal single value aggregate function.
static final class	SingleValueAggFunction.DoubleSingleValueAggFunction	Built-in double single value aggregate function.
static final class	SingleValueAggFunction.FloatSingleValueAggFunction	Built-in float single value aggregate function.
static final class	SingleValueAggFunction.IntSingleValueAggFunction	Built-in int single value aggregate function.
static final class	SingleValueAggFunction.LongSingleValueAggFunction	Built-in long single value aggregate function.
static final class	SingleValueAggFunction.ShortSingleValueAggFunction	Built-in short single value aggregate function.
static final class	SingleValueAggFunction.StringSingleValueAggFunction	Built-in string single value aggregate function.
static final class	SingleValueAggFunction.TimeSingleValueAggFunction	Built-in time single value aggregate function.
static final class	SingleValueAggFunction.TimestampLtzSingleValueAggFunction	Built-in timestampLtz single value aggregate function.
static final class	SingleValueAggFunction.TimestampSingleValueAggFunction	Built-in timestamp single value aggregate function.

Constructor Summary

Constructors

Constructor	Description
SingleValueAggFunction()

Method Summary

Modifier and Type	Method	Description
org.apache.flink.table.expressions.Expression[]	accumulateExpressions()
org.apache.flink.table.expressions.UnresolvedReferenceExpression[]	aggBufferAttributes()
org.apache.flink.table.types.DataType[]	getAggBufferTypes()
org.apache.flink.table.expressions.Expression	getValueExpression()
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

SingleValueAggFunction

public SingleValueAggFunction()

Method Details

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()

Specified by:

getValueExpression in class org.apache.flink.table.functions.DeclarativeAggregateFunction