Package org.apache.iotdb.db.query.udf.example

Class UDAFCount

java.lang.Object

org.apache.iotdb.db.query.udf.example.UDAFCount

All Implemented Interfaces:

UDAF, UDF

public class UDAFCount
extends Object
implements UDAF

Constructor Summary

Constructors

Constructor	Description
UDAFCount()

Method Summary

Modifier and Type	Method	Description
void	addInput(State state, org.apache.tsfile.block.column.Column[] column, org.apache.tsfile.utils.BitMap bitMap)
void	beforeStart(UDFParameters parameters, UDAFConfigurations configurations)
void	combineState(State state, State rhs)
State	createState()
void	outputFinal(State state, ResultValue resultValue)
void	removeState(State state, State removed)
void	validate(UDFParameterValidator validator)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.iotdb.udf.api.UDF

beforeDestroy

Constructor Details

UDAFCount

public UDAFCount()

Method Details

validate

public void validate(UDFParameterValidator validator)
              throws Exception

Specified by:

validate in interface UDF

Throws:

Exception

beforeStart

public void beforeStart(UDFParameters parameters,
 UDAFConfigurations configurations)

Specified by:

beforeStart in interface UDAF

createState

public State createState()

Specified by:

createState in interface UDAF

addInput

public void addInput(State state,
 org.apache.tsfile.block.column.Column[] column,
 org.apache.tsfile.utils.BitMap bitMap)

Specified by:

addInput in interface UDAF

combineState

public void combineState(State state,
 State rhs)

Specified by:

combineState in interface UDAF

outputFinal

public void outputFinal(State state,
 ResultValue resultValue)

Specified by:

outputFinal in interface UDAF

removeState

public void removeState(State state,
 State removed)

Specified by:

removeState in interface UDAF