org.apache.drill.exec.expr.fn

Interface FunctionLookupContext

All Known Implementing Classes:

FunctionImplementationRegistry

public interface FunctionLookupContext

Method Summary

Modifier and Type	Method and Description
DrillFuncHolder	findDrillFunction(FunctionResolver functionResolver, FunctionCall functionCall) Method returns the materialized drill function corresponding to the functioncall that is passed in
AbstractFuncHolder	findNonDrillFunction(FunctionCall functionCall) Find function implementation for given functionCall in non-Drill function registries such as Hive UDF registry.

Method Detail

findDrillFunction

DrillFuncHolder findDrillFunction(FunctionResolver functionResolver,
                                  FunctionCall functionCall)

Method returns the materialized drill function corresponding to the functioncall that is passed in

Parameters:

functionResolver - - Type of resolver to use. Specifies if the arguments should match exactly or can use implicit cast

functionCall - - Specifies function name and type of arguments

Returns:

DrillFuncHolder

findNonDrillFunction

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.

Parameters:

functionCall - - Specifies function name and type of arguments

Returns:

AbstractFuncHolder