org.apache.hadoop.hive.ql.exec

Class ComparisonOpMethodResolver

java.lang.Object

org.apache.hadoop.hive.ql.exec.ComparisonOpMethodResolver

All Implemented Interfaces:

UDFMethodResolver

public class ComparisonOpMethodResolver
extends Object
implements UDFMethodResolver

The class implements the method resolution for operators like (> < <= >= = <>). The resolution logic is as follows: 1. If one of the parameters is null, then it resolves to evaluate(Double, Double) 2. If both of the parameters are of type T, then it resolves to evaluate(T, T) 3. If 1 and 2 fails then it resolves to evaluate(Double, Double).

Constructor Summary

Constructors

Constructor and Description
ComparisonOpMethodResolver(Class<? extends UDF> udfClass) Constuctor.

Method Summary

Modifier and Type	Method and Description
Method	getEvalMethod(List<TypeInfo> argTypeInfos)

Methods inherited from class java.lang.Object

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

Constructor Detail

ComparisonOpMethodResolver

public ComparisonOpMethodResolver(Class<? extends UDF> udfClass)

Constuctor.

Method Detail

getEvalMethod

public Method getEvalMethod(List<TypeInfo> argTypeInfos)
                     throws UDFArgumentException

Specified by:

getEvalMethod in interface UDFMethodResolver

Throws:

UDFArgumentException