Package org.apache.iotdb.db.mpp.plan.planner.plan.parameter

Class AggregationDescriptor

java.lang.Object

org.apache.iotdb.db.mpp.plan.planner.plan.parameter.AggregationDescriptor

Direct Known Subclasses:

GroupByLevelDescriptor

public class AggregationDescriptor
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
protected java.lang.String	aggregationFuncName
protected AggregationType	aggregationType
protected java.util.List<Expression>	inputExpressions	Input of aggregation function.
protected AggregationStep	step

Constructor Summary

Constructors

Constructor	Description
AggregationDescriptor(java.lang.String aggregationFuncName, AggregationStep step, java.util.List<Expression> inputExpressions)
AggregationDescriptor(AggregationDescriptor other)

Method Summary

Modifier and Type	Method	Description
AggregationDescriptor	deepClone()
static AggregationDescriptor	deserialize(java.nio.ByteBuffer byteBuffer)
boolean	equals(java.lang.Object o)
protected java.util.List<java.lang.String>	getActualAggregationNames(boolean isPartial)	Keep the lower case of function name for partial result, and origin value for others.
java.lang.String	getAggregationFuncName()
AggregationType	getAggregationType()
java.util.Map<java.lang.String,Expression>	getInputColumnCandidateMap()
java.util.List<java.lang.String>	getInputColumnNames(Expression inputExpression)
java.util.List<java.util.List<java.lang.String>>	getInputColumnNamesList()
java.util.List<Expression>	getInputExpressions()
java.util.List<java.lang.String>	getOutputColumnNames()
java.lang.String	getParametersString()	Generates the parameter part of the function column name.
AggregationStep	getStep()
int	hashCode()
void	serialize(java.io.DataOutputStream stream)
void	serialize(java.nio.ByteBuffer byteBuffer)
void	setInputExpressions(java.util.List<Expression> inputExpressions)
void	setStep(AggregationStep step)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

aggregationType

protected final AggregationType aggregationType

aggregationFuncName

protected final java.lang.String aggregationFuncName

step

protected AggregationStep step

inputExpressions

protected java.util.List<Expression> inputExpressions

Input of aggregation function. Currently, we only support one series in the aggregation function.

example: select sum(s1) from root.sg.d1; expression [root.sg.d1.s1] will be in this field.

example: select sum(s1) from root.** group by level = 1; expression [root.sg.*.s1] may be in this field if the data is in different DataRegion

Constructor Detail

AggregationDescriptor

public AggregationDescriptor(java.lang.String aggregationFuncName,
                             AggregationStep step,
                             java.util.List<Expression> inputExpressions)

AggregationDescriptor

public AggregationDescriptor(AggregationDescriptor other)

Method Detail

getAggregationFuncName

public java.lang.String getAggregationFuncName()

getOutputColumnNames

public java.util.List<java.lang.String> getOutputColumnNames()

getInputColumnNamesList

public java.util.List<java.util.List<java.lang.String>> getInputColumnNamesList()

getInputColumnNames

public java.util.List<java.lang.String> getInputColumnNames(Expression inputExpression)

getInputColumnCandidateMap

public java.util.Map<java.lang.String,Expression> getInputColumnCandidateMap()

getActualAggregationNames

protected java.util.List<java.lang.String> getActualAggregationNames(boolean isPartial)

Keep the lower case of function name for partial result, and origin value for others.

getParametersString

public java.lang.String getParametersString()

Generates the parameter part of the function column name.

Example:

Full column name -> udf(root.sg.d.s1, sin(root.sg.d.s1))

The parameter part -> root.sg.d.s1, sin(root.sg.d.s1)

getInputExpressions

public java.util.List<Expression> getInputExpressions()

getAggregationType

public AggregationType getAggregationType()

getStep

public AggregationStep getStep()

setStep

public void setStep(AggregationStep step)

setInputExpressions

public void setInputExpressions(java.util.List<Expression> inputExpressions)

deepClone

public AggregationDescriptor deepClone()

serialize

public void serialize(java.nio.ByteBuffer byteBuffer)

serialize

public void serialize(java.io.DataOutputStream stream)
               throws java.io.IOException

Throws:

java.io.IOException

deserialize

public static AggregationDescriptor deserialize(java.nio.ByteBuffer byteBuffer)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object