ROOT::RClusterDescriptor Class Reference

Metadata for RNTuple clusters.

The cluster descriptor is built in two phases. In a first phase, the descriptor has only an ID. In a second phase, the event range, column group, page locations and column ranges are added. Both phases are populated by the RClusterDescriptorBuilder. Clusters span across all available columns in the RNTuple.

Definition at line 238 of file RNTupleDescriptor.hxx.

Classes
class	RColumnRange
	The window of element indexes of a particular column in a particular cluster. More...
class	RColumnRangeIterable
class	RPageInfo
	Information about a single page in the context of a cluster's page range. More...
class	RPageInfoExtended
	Additional information about a page in an in-memory RPageRange. More...
class	RPageRange
	Records the partition of data into pages for a particular column in a particular cluster. More...

Public Member Functions
	RClusterDescriptor ()=default
	RClusterDescriptor (const RClusterDescriptor &other)=delete
	RClusterDescriptor (RClusterDescriptor &&other)=default
RClusterDescriptor	Clone () const
bool	ContainsColumn (ROOT::DescriptorId_t physicalId) const
const RColumnRange &	GetColumnRange (ROOT::DescriptorId_t physicalId) const
RColumnRangeIterable	GetColumnRangeIterable () const
	Returns an iterator over pairs { columnId, columnRange }. The iteration order is unspecified.
ROOT::NTupleSize_t	GetFirstEntryIndex () const
ROOT::DescriptorId_t	GetId () const
std::uint64_t	GetNBytesOnStorage () const
ROOT::NTupleSize_t	GetNEntries () const
const RPageRange &	GetPageRange (ROOT::DescriptorId_t physicalId) const
RClusterDescriptor &	operator= (const RClusterDescriptor &other)=delete
RClusterDescriptor &	operator= (RClusterDescriptor &&other)=default
bool	operator== (const RClusterDescriptor &other) const

Private Attributes
ROOT::DescriptorId_t	fClusterId = ROOT::kInvalidDescriptorId
std::unordered_map< ROOT::DescriptorId_t, RColumnRange >	fColumnRanges
ROOT::NTupleSize_t	fFirstEntryIndex = ROOT::kInvalidNTupleIndex
	Clusters can be swapped by adjusting the entry offsets of the cluster and all ranges.
ROOT::NTupleSize_t	fNEntries = ROOT::kInvalidNTupleIndex
std::unordered_map< ROOT::DescriptorId_t, RPageRange >	fPageRanges

Friends
class	Internal::RClusterDescriptorBuilder

#include <ROOT/RNTupleDescriptor.hxx>

Constructor & Destructor Documentation

RClusterDescriptor() [1/3]

ROOT::RClusterDescriptor::RClusterDescriptor ( )

default

RClusterDescriptor() [2/3]

ROOT::RClusterDescriptor::RClusterDescriptor ( const RClusterDescriptor & other )

delete

RClusterDescriptor() [3/3]

ROOT::RClusterDescriptor::RClusterDescriptor ( RClusterDescriptor && other )

default

Member Function Documentation

Clone()

ROOT::RClusterDescriptor ROOT::RClusterDescriptor::Clone

(

)

const

Definition at line 285 of file RNTupleDescriptor.cxx.

ContainsColumn()

bool ROOT::RClusterDescriptor::ContainsColumn ( ROOT::DescriptorId_t physicalId ) const

inline

Definition at line 471 of file RNTupleDescriptor.hxx.

GetColumnRange()

const RColumnRange & ROOT::RClusterDescriptor::GetColumnRange ( ROOT::DescriptorId_t physicalId ) const

inline

Definition at line 467 of file RNTupleDescriptor.hxx.

GetColumnRangeIterable()

ROOT::RClusterDescriptor::RColumnRangeIterable ROOT::RClusterDescriptor::GetColumnRangeIterable

(

)

const

Returns an iterator over pairs { columnId, columnRange }. The iteration order is unspecified.

Definition at line 1404 of file RNTupleDescriptor.cxx.

GetFirstEntryIndex()

ROOT::NTupleSize_t ROOT::RClusterDescriptor::GetFirstEntryIndex ( ) const

inline

Definition at line 465 of file RNTupleDescriptor.hxx.

GetId()

ROOT::DescriptorId_t ROOT::RClusterDescriptor::GetId ( ) const

inline

Definition at line 464 of file RNTupleDescriptor.hxx.

GetNBytesOnStorage()

std::uint64_t ROOT::RClusterDescriptor::GetNBytesOnStorage

(

)

const

Definition at line 274 of file RNTupleDescriptor.cxx.

GetNEntries()

ROOT::NTupleSize_t ROOT::RClusterDescriptor::GetNEntries ( ) const

inline

Definition at line 466 of file RNTupleDescriptor.hxx.

GetPageRange()

const RPageRange & ROOT::RClusterDescriptor::GetPageRange ( ROOT::DescriptorId_t physicalId ) const

inline

Definition at line 468 of file RNTupleDescriptor.hxx.

operator=() [1/2]

RClusterDescriptor & ROOT::RClusterDescriptor::operator= ( const RClusterDescriptor & other )

delete

operator=() [2/2]

RClusterDescriptor & ROOT::RClusterDescriptor::operator= ( RClusterDescriptor && other )

default

operator==()

bool ROOT::RClusterDescriptor::operator==

(

const RClusterDescriptor &

other

)

const

Definition at line 268 of file RNTupleDescriptor.cxx.

Friends And Related Symbol Documentation

Internal::RClusterDescriptorBuilder

friend class Internal::RClusterDescriptorBuilder

friend

Definition at line 239 of file RNTupleDescriptor.hxx.

Member Data Documentation

fClusterId

ROOT::DescriptorId_t ROOT::RClusterDescriptor::fClusterId = ROOT::kInvalidDescriptorId

private

Definition at line 443 of file RNTupleDescriptor.hxx.

fColumnRanges

std::unordered_map<ROOT::DescriptorId_t, RColumnRange> ROOT::RClusterDescriptor::fColumnRanges

private

Definition at line 448 of file RNTupleDescriptor.hxx.

fFirstEntryIndex

ROOT::NTupleSize_t ROOT::RClusterDescriptor::fFirstEntryIndex = ROOT::kInvalidNTupleIndex

private

Clusters can be swapped by adjusting the entry offsets of the cluster and all ranges.

Definition at line 445 of file RNTupleDescriptor.hxx.

fNEntries

ROOT::NTupleSize_t ROOT::RClusterDescriptor::fNEntries = ROOT::kInvalidNTupleIndex

private

Definition at line 446 of file RNTupleDescriptor.hxx.

fPageRanges

std::unordered_map<ROOT::DescriptorId_t, RPageRange> ROOT::RClusterDescriptor::fPageRanges

private

Definition at line 449 of file RNTupleDescriptor.hxx.

Libraries for ROOT::RClusterDescriptor:

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The documentation for this class was generated from the following files:

• tree/ntuple/inc/ROOT/RNTupleDescriptor.hxx
• tree/ntuple/src/RNTupleDescriptor.cxx