com.heitaox.sql.executor.core.function.udaf

类 SUM

java.lang.Object

com.heitaox.sql.executor.core.function.udaf.UDAF<Number,Number>

com.heitaox.sql.executor.core.function.udaf.SUM

public class SUM
extends UDAF<Number,Number>

字段概要

从类继承的字段 com.heitaox.sql.executor.core.function.udaf.UDAF

AGGREGATE_METHOD_NAME, COMPUTE_RESULT_METHOD_NAME, INIT_MATHOD_NAME

构造器概要

构造器

构造器和说明
SUM()

方法概要

限定符和类型	方法和说明
Number	aggregate(Number input, Number aggre) Aggregate the input parameters according to a certain logic and the results after the last aggregation
Number	computeResult(Number aggre) Calculate the final result using the results obtained after the final polymerization
Number	getInitData() Initial value of the aggregate function

从类继承的方法 java.lang.Object

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

构造器详细资料

SUM

public SUM()

方法详细资料

getInitData

public Number getInitData()

从类复制的说明: UDAF

Initial value of the aggregate function

指定者:

getInitData 在类中 UDAF<Number,Number>

返回:

Initial value

aggregate

public Number aggregate(Number input,
                        Number aggre)

从类复制的说明: UDAF

Aggregate the input parameters according to a certain logic and the results after the last aggregation

指定者:

aggregate 在类中 UDAF<Number,Number>

参数:

input - input parameter

aggre - Results after the last aggregation

返回:

Results after this aggregation

computeResult

public Number computeResult(Number aggre)

从类复制的说明: UDAF

Calculate the final result using the results obtained after the final polymerization

指定者:

computeResult 在类中 UDAF<Number,Number>

参数:

aggre - Result after final polymerization

返回:

final result