org.apache.drill.exec.expr.fn

Class FunctionImplementationRegistry

java.lang.Object

org.apache.drill.exec.expr.fn.FunctionImplementationRegistry

All Implemented Interfaces:

FunctionLookupContext

public class FunctionImplementationRegistry
extends Object
implements FunctionLookupContext

Constructor Summary

Constructors

Constructor and Description
FunctionImplementationRegistry(DrillConfig config)
FunctionImplementationRegistry(DrillConfig config, OptionManager optionManager)

Method Summary

Methods

Modifier and Type	Method and Description
DrillFuncHolder	findDrillFunction(FunctionResolver functionResolver, FunctionCall functionCall) Using the given functionResolver find Drill function implementation for given functionCall
DrillFuncHolder	findExactMatchingDrillFunction(String name, List<TypeProtos.MajorType> argTypes, TypeProtos.MajorType returnType) Find the Drill function implementation that matches the name, arg types and return type.
AbstractFuncHolder	findNonDrillFunction(FunctionCall functionCall) Find function implementation for given functionCall in non-Drill function registries such as Hive UDF registry.
boolean	isFunctionComplexOutput(String name)
void	register(DrillOperatorTable operatorTable) Register functions in given operator table.

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionImplementationRegistry

public FunctionImplementationRegistry(DrillConfig config)

FunctionImplementationRegistry

public FunctionImplementationRegistry(DrillConfig config,
                              OptionManager optionManager)

Method Detail

register

public void register(DrillOperatorTable operatorTable)

Register functions in given operator table.

Parameters:

operatorTable -

findDrillFunction

public DrillFuncHolder findDrillFunction(FunctionResolver functionResolver,
                                FunctionCall functionCall)

Using the given functionResolver find Drill function implementation for given functionCall

Specified by:

findDrillFunction in interface FunctionLookupContext

Parameters:

functionResolver -

functionCall -

Returns:

findExactMatchingDrillFunction

public DrillFuncHolder findExactMatchingDrillFunction(String name,
                                             List<TypeProtos.MajorType> argTypes,
                                             TypeProtos.MajorType returnType)

Find the Drill function implementation that matches the name, arg types and return type.

Parameters:

name -

argTypes -

returnType -

Returns:

findNonDrillFunction

public AbstractFuncHolder findNonDrillFunction(FunctionCall functionCall)

Find function implementation for given functionCall in non-Drill function registries such as Hive UDF registry. Note: Order of searching is same as order of PluggableFunctionRegistry implementations found on classpath.

Specified by:

findNonDrillFunction in interface FunctionLookupContext

Parameters:

functionCall -

Returns:

isFunctionComplexOutput

public boolean isFunctionComplexOutput(String name)