Vertica::DefaultSourceIterator Class Reference

Inheritance diagram for Vertica::DefaultSourceIterator:

Collaboration diagram for Vertica::DefaultSourceIterator:

Public Member Functions
	DefaultSourceIterator (std::vector< UDSource * > sources)
UnsizedUDSource *	createNextSource (ServerInterface &srvInterface)
	Create the next UDSource to process. More...
virtual void	destroy (ServerInterface &srvInterface, NodeSpecifyingPlanContext &planCtxt)
	Tear down this SourceIterator. More...
size_t	getNumberOfSources ()
size_t	getSizeOfSource (size_t sourceNum)
virtual void	setup (ServerInterface &srvInterface, NodeSpecifyingPlanContext &planCtxt)
	Set up this SourceIterator. More...

Member Function Documentation

UnsizedUDSource* Vertica::DefaultSourceIterator::createNextSource ( ServerInterface &  srvInterface )

inlinevirtual

Create the next UDSource to process.

Should return NULL if no further sources are available for processing.

Note that the previous Source may still be open and in use on a different thread when this function is called.

Returns

a new Source instance corresponding to a new input stream

Implements Vertica::SourceIterator.

virtual void Vertica::SourceIterator::destroy ( ServerInterface &  srvInterface, NodeSpecifyingPlanContext &  planCtxt  )

inlinevirtualinherited

Tear down this SourceIterator.

Should perform clean-up that should not take place in the destructor due to the exception-handling semantics of destructors.

size_t Vertica::DefaultSourceIterator::getNumberOfSources ( )

inlinevirtual

Returns

the total number of Sources that this factory will produce

Implements Vertica::SourceIterator.

size_t Vertica::DefaultSourceIterator::getSizeOfSource ( size_t  sourceNum )

inlinevirtual

Returns

the raw-data size of the sourceNum'th source that will be produced by createNextSource(). Should return vint_null if the size is unknown.

This value is used as a hint, and is used by the "load_streams" table to display load progress. If incorrect or not set, "load_streams" may contain incorrect or unhelpful information.

Reimplemented from Vertica::SourceIterator.

virtual void Vertica::SourceIterator::setup ( ServerInterface &  srvInterface, NodeSpecifyingPlanContext &  planCtxt  )

inlinevirtualinherited

Set up this SourceIterator.

Should perform setup that should not take place in the constructor due to the exception-handling semantics of constructors