com.vertica.sdk.UDXFactory Class Reference

Inheritance diagram for com.vertica.sdk.UDXFactory:

Collaboration diagram for com.vertica.sdk.UDXFactory:

Classes
enum	UDXType

Public Member Functions
void	getParameterType (ServerInterface srvInterface, SizedColumnTypes parameterTypes)
void	getPerInstanceResources (ServerInterface srvInterface, VResources res)
void	getPerInstanceResources (ServerInterface srvInterface, VResources res, SizedColumnTypes argTypes)
abstract void	getPrototype (ServerInterface srvInterface, ColumnTypes argTypes, ColumnTypes returnType)
abstract void	getReturnType (ServerInterface srvInterface, SizedColumnTypes argTypes, SizedColumnTypes returnType) throws UdfException
abstract UDXType	getUDXFactoryType ()

Protected Attributes
long	libOid
String	sqlName

Detailed Description

Parent class for UDx factories; not intended for direct use by applications.

Member Function Documentation

getParameterType()

void com.vertica.sdk.UDXFactory.getParameterType	(	ServerInterface	srvInterface,
		SizedColumnTypes	parameterTypes
	)

Function to tell Vertica the name and types of parameters that this function uses. Vertica will use this to warn function callers that certain parameters they provide are not affecting anything, or that certain parameters that are not being set are reverting to default values.

Parameters

srvInterface	a ServerInterface object used to communicate with Vertica
parameterTypes	SizedColumnTypes describing the parameters

getPerInstanceResources() [1/2]

void com.vertica.sdk.UDXFactory.getPerInstanceResources	(	ServerInterface	srvInterface,
		VResources	res
	)

Set the resource required for each instance of the UDX Object subclass

Parameters

srvInterface	a ServerInterface object used to communicate with Vertica
res	a VResources object used to tell Vertica what resources are needed by the UDX

Referenced by com.vertica.sdk.UDXFactory.getPerInstanceResources().

getPerInstanceResources() [2/2]

void com.vertica.sdk.UDXFactory.getPerInstanceResources	(	ServerInterface	srvInterface,
		VResources	res,
		SizedColumnTypes	argTypes
	)

Set the resource required for each instance of the UDX Object subclass

Parameters

srvInterface	a ServerInterface object used to communicate with Vertica
res	a VResources object used to tell Vertica what resources are needed by the UDX
argTypes	Provides the data types of arguments that this UDx was called with. This may be used to calculate the resources required by the UDx.

getPrototype()

abstract void com.vertica.sdk.UDXFactory.getPrototype ( ServerInterface  srvInterface, ColumnTypes  argTypes, ColumnTypes  returnType  )

abstract

Provides the argument and return types of the UDX

Parameters

srvInterface	a ServerInterface object used to communicate with Vertica
argTypes	the types of the arguments
returnType	the type(s) of the return

Referenced by com.vertica.sdk.ScalarFunctionFactory.getReturnType().

getReturnType()

abstract void com.vertica.sdk.UDXFactory.getReturnType ( ServerInterface  srvInterface, SizedColumnTypes  argTypes, SizedColumnTypes  returnType  ) throws UdfException

abstract

Function to tell Vertica what the return types (and length/precision if necessary) of this UDX are.

For CHAR/VARCHAR types, specify the max length,

For NUMERIC types, specify the precision and scale.

For Time types (with or without time zone), specify the precision, -1 means unspecified/don't care

For IntervalYM/IntervalDS types, specify the precision and range

For all other types, no length/precision specification needed

Parameters

srvInterface	a ServerInterface object used to communicate with Vertica
argTypes	Provides the data types of arguments that this UDT was called with. This may be used to modify the return types accordingly.
returnType	User code must fill in the names and data types returned by the UDT.

getUDXFactoryType()

abstract UDXType com.vertica.sdk.UDXFactory.getUDXFactoryType ( )

abstract

User subclasses should use the appropriate subclass of UDXFactory and not override this method on their own.

Returns

the type of UDX Object instance this factory returns.