Java SDK Documentation  24.2.0
com.vertica.sdk.TransformFunctionFactory Class Referenceabstract
Inheritance diagram for com.vertica.sdk.TransformFunctionFactory:
Inheritance graph
Collaboration diagram for com.vertica.sdk.TransformFunctionFactory:
Collaboration graph

Public Member Functions

abstract TransformFunction createTransformFunction (ServerInterface srvInterface)
 
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
 
UDXType getUDXFactoryType ()
 

Protected Attributes

long libOid
 
String sqlName
 

Detailed Description

Interface for declaring parameters and return types for, and instantiating, an associated TransformFunction.

Member Function Documentation

◆ createTransformFunction()

abstract TransformFunction com.vertica.sdk.TransformFunctionFactory.createTransformFunction ( ServerInterface  srvInterface)
abstract

Called when Vertica needs a new TransformFunction object to process a UDTF function call.

Note: More than one object may be instantiated per query.

Parameters
srvInterfacea ServerInterface object used to communicate with Vertica
Returns
an TransformFunction object which implements the UDx API described by this metadata.

◆ getParameterType()

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

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
srvInterfacea ServerInterface object used to communicate with Vertica
parameterTypesSizedColumnTypes describing the parameters

◆ getPerInstanceResources() [1/2]

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

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

Parameters
srvInterfacea ServerInterface object used to communicate with Vertica
resa 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 
)
inherited

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

Parameters
srvInterfacea ServerInterface object used to communicate with Vertica
resa VResources object used to tell Vertica what resources are needed by the UDX
argTypesProvides 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 
)
abstractinherited

Provides the argument and return types of the UDX

Parameters
srvInterfacea ServerInterface object used to communicate with Vertica
argTypesthe types of the arguments
returnTypethe 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
abstractinherited

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
srvInterfacea ServerInterface object used to communicate with Vertica
argTypesProvides the data types of arguments that this UDT was called with. This may be used to modify the return types accordingly.
returnTypeUser code must fill in the names and data types returned by the UDT.

◆ getUDXFactoryType()

UDXType com.vertica.sdk.TransformFunctionFactory.getUDXFactoryType ( )
Returns
the object type internally used by Vertica