Hypertable::Lib::ScanCells Class Reference

This class takes allows vector access to a set of cells contained in an EventPtr without any copying. More...

#include <ScanCells.h>

Collaboration diagram for Hypertable::Lib::ScanCells:

Public Member Functions
	ScanCells ()
void	get (Cells &cells)
void	get_cell_unchecked (Cell &cc, size_t ii)
void	set_eos (bool eos=true)
bool	get_eos () const
size_t	size () const
bool	empty () const
size_t	memory_used () const
ProfileDataScanner &	profile_data ()
	Returns reference to profile data. More...
bool	add (EventPtr &event, int *scanner_id)
	Adds key/value pairs from scan result. More...
void	add (Cell &cell, bool own=true)
	adds a new cell to the internal cell buffer this is an internal method required by IndexScannerCallback More...
bool	load (SchemaPtr &schema, const std::string &end_row, bool end_inclusive, ScanLimitState *limit_state, CstrSet &rowset, int64_t *bytes_scanned, Key *lastkey)
int	get_skipped_rows ()
	get number of rows that were skipped because of an OFFSET predicate More...
int	get_skipped_cells ()
	get number of cells that were skipped because of a CELL_OFFSET predicate More...

Protected Attributes
vector< ScanBlockPtr >	m_scanblocks
CellsBuilderPtr	m_cells
ProfileDataScanner	m_profile_data
bool	m_eos {}

Detailed Description

This class takes allows vector access to a set of cells contained in an EventPtr without any copying.

Definition at line 46 of file ScanCells.h.

Constructor & Destructor Documentation

Hypertable::Lib::ScanCells::ScanCells ( )

inline

Definition at line 49 of file ScanCells.h.

Member Function Documentation

bool ScanCells::add	(	EventPtr &	event,
		int *	scanner_id
	)

Adds key/value pairs from scan result.

Parameters

event	the event that contains the scan results
scanner_id	scanner_id for the scanner

Returns

true if this if this event has the eos bit set

Aggregate profile data

Definition at line 30 of file ScanCells.cc.

void ScanCells::add	(	Cell &	cell,
		bool	own = true
	)

adds a new cell to the internal cell buffer this is an internal method required by IndexScannerCallback

Definition at line 153 of file ScanCells.cc.

bool Hypertable::Lib::ScanCells::empty ( ) const

inline

Definition at line 69 of file ScanCells.h.

void Hypertable::Lib::ScanCells::get ( Cells &  cells )

inline

Definition at line 51 of file ScanCells.h.

void Hypertable::Lib::ScanCells::get_cell_unchecked ( Cell &  cc, size_t  ii  )

inline

Definition at line 59 of file ScanCells.h.

bool Hypertable::Lib::ScanCells::get_eos ( ) const

inline

Definition at line 61 of file ScanCells.h.

int Hypertable::Lib::ScanCells::get_skipped_cells ( )

inline

get number of cells that were skipped because of a CELL_OFFSET predicate

Definition at line 126 of file ScanCells.h.

int Hypertable::Lib::ScanCells::get_skipped_rows ( )

inline

get number of rows that were skipped because of an OFFSET predicate

Definition at line 115 of file ScanCells.h.

bool ScanCells::load	(	SchemaPtr &	schema,
		const std::string &	end_row,
		bool	end_inclusive,
		ScanLimitState *	limit_state,
		CstrSet &	rowset,
		int64_t *	bytes_scanned,
		Key *	lastkey
	)

Parameters

schema	is the schema for the table being scanned
end_row	the end_row of the scan for which we got these results
end_inclusive	is the end_row included in the scan
limit_state	Pointer to ScanLimitState
rowset	Reference to set of rows to be selected
bytes_scanned	number of bytes read
lastkey	Return pointer to last key in block

Returns

true if scan has reached end

Definition at line 44 of file ScanCells.cc.

size_t Hypertable::Lib::ScanCells::memory_used ( ) const

inline

Definition at line 73 of file ScanCells.h.

ProfileDataScanner& Hypertable::Lib::ScanCells::profile_data ( )

inline

Returns reference to profile data.

Returns

Reference to profile data

Definition at line 83 of file ScanCells.h.

void Hypertable::Lib::ScanCells::set_eos ( bool  eos = true )

inline

Definition at line 60 of file ScanCells.h.

size_t Hypertable::Lib::ScanCells::size ( ) const

inline

Definition at line 62 of file ScanCells.h.

Member Data Documentation

CellsBuilderPtr Hypertable::Lib::ScanCells::m_cells

protected

Definition at line 137 of file ScanCells.h.

bool Hypertable::Lib::ScanCells::m_eos {}

protected

Definition at line 139 of file ScanCells.h.

ProfileDataScanner Hypertable::Lib::ScanCells::m_profile_data

protected

Definition at line 138 of file ScanCells.h.

vector<ScanBlockPtr> Hypertable::Lib::ScanCells::m_scanblocks

protected

Definition at line 136 of file ScanCells.h.

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

• /home/doug/src/hypertable/src/cc/Hypertable/Lib/ScanCells.h
• /home/doug/src/hypertable/src/cc/Hypertable/Lib/ScanCells.cc