Vertica::FunctionFactory Class Reference

Inheritance diagram for Vertica::FunctionFactory:

Collaboration diagram for Vertica::FunctionFactory:

Public Types
enum UDXType { SCALAR = 1, TRANSFORM = 2, ANALYTIC = 3, MULTI_TRANSFORM = 4, AGGREGATE = 5, LOAD_SOURCE = 6, LOAD_FILTER = 7, LOAD_PARSER = 8, FILESYSTEM = 9, TYPE = 10, CURSOR_TRANSFORM = 11, KEYMANAGER = 12 }
Public Member Functions
virtual void getParameterType (ServerInterface &srvInterface, SizedColumnTypes meterTypes)
virtual void getPerInstanceResources (ServerInterface &srvInterface, VResources &res)
virtual void getPerInstanceResources (ServerInterface &srvInterface, VResources &res, const SizedColumnTypes &inputTypes)
virtual void getPrototype (ServerInterface &srvInterface, ColumnTypes &argTypes, ColumnTypes &returnType)=0
virtual void getReturnType (ServerInterface &srvInterface, const SizedColumnTypes &argTypes, SizedColumnTypes &returnType)=0
virtual UDXType getUDXFactoryType ()=0
Protected Attributes
Oid libOid
std::string sqlName

Member Enumeration Documentation

enum Vertica::UDXFactory::UDXType

inherited The type of UDX instance this factory produces

Member Function Documentation

virtual void Vertica::UDXFactory::getParameterType(ServerInterface & srvInterface, SizedColumnTypes & parameterTypes)

inlinevirtualinherited

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.

Reimplemented in Vertica::ParserFactory.

virtual void Vertica::UDXFactory::getPerInstanceResources(ServerInterface & srvInterface, VResources & res)

inlinevirtualinherited

Set the resource required for each instance of the UDX Object subclass. Users should override only one of the following methods.

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

Reimplemented in Vertica::UDLFactory.

Referenced by Vertica::UDXFactory::getPerInstanceResources().

virtual void Vertica::UDXFactory::getPerInstanceResources(ServerInterface & srvInterface, VResources & res, const SizedColumnTypes & inputTypes)

inlinevirtualinherited

Set the resource required for each instance of the UDX Object subclass. Users should override only one of the following methods.

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 UDT was called with

Reimplemented in Vertica::UDLFactory.

virtual void Vertica::FunctionFactory::getPrototype(ServerInterface & srvInterface, ColumnTypes & argTypes, ColumnTypes & returnType)

pure virtual Provides the argument and return types of the UDX

Implemented in Vertica::MultiPhaseTransformFunctionFactory.

Referenced by Vertica::ScalarFunctionFactory::getReturnType().

virtual void Vertica::FunctionFactory::getReturnType(ServerInterface & srvInterface, const SizedColumnTypes & argTypes, SizedColumnTypes & returnType)

pure virtual 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/Timestamp 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

  • 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.

Implemented in Vertica::MultiPhaseTransformFunctionFactory, and Vertica::ScalarFunctionFactory.

virtual UDXType Vertica::UDXFactory::getUDXFactoryType()

pure virtual inherited Returns the type of UDX Object instance this factory returns.

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

Implemented in Vertica::UDKeyManagerFactory, Vertica::MultiPhaseTransformFunctionFactory, Vertica::AggregateFunctionFactory, Vertica::AnalyticFunctionFactory, Vertica::TransformFunctionFactory, Vertica::ScalarFunctionFactory, Vertica::ParserFactory, Vertica::FilterFactory, Vertica::IterativeSourceFactory, and Vertica::UDFileSystemFactory.