CoGaDB::CompressedColumn< T > Class Template Reference

This class represents a compressed column with type T, is the base class for all compressed typed column classes and allows a uniform handling of compressed columns of a certain type T. More...

#include <compressed_column.hpp>

Inheritance diagram for CoGaDB::CompressedColumn< T >:

Collaboration diagram for CoGaDB::CompressedColumn< T >:

List of all members.

Public Member Functions
	CompressedColumn (const std::string &name, AttributeType db_type)
virtual	~CompressedColumn ()
virtual bool	insert (const boost::any &new_Value)=0
	appends a value new_Value to end of column
virtual bool	insert (const T &new_value)=0
virtual bool	update (TID tid, const boost::any &new_value)=0
	updates the value on position tid with a value new_Value
virtual bool	update (PositionListPtr tid, const boost::any &new_value)=0
	updates the values specified by the position list with a value new_Value
virtual bool	remove (TID tid)=0
	deletes the value on position tid
virtual bool	remove (PositionListPtr tid)=0
	deletes the values defined in the position list
virtual bool	clearContent ()=0
	deletes all values stored in the column
virtual const boost::any	get (TID tid)=0
	generic function for fetching a value form a column (slow)
virtual void	print () const =0 throw ()
	prints the content of a column
virtual size_t	size () const =0 throw ()
	returns the number of values (rows) in a column
virtual unsigned int	getSizeinBytes () const =0 throw ()
	returns the size in bytes the column consumes in main memory
virtual const ColumnPtr	copy () const =0
	virtual copy constructor
virtual bool	store (const std::string &path)=0
	store a column on the disc
virtual bool	load (const std::string &path)=0
	load column from disc
virtual bool	isMaterialized () const throw ()
	use this method to determine whether the column is materialized or a Lookup Column
virtual bool	isCompressed () const throw ()
	use this method to determine whether the column is materialized or a Lookup Column
virtual T &	operator[] (const int index)=0
	defines operator[] for this class, which enables the user to thread all typed columns as arrays.
	CompressedColumn (const std::string &name, AttributeType db_type)
virtual	~CompressedColumn ()
virtual bool	insert (const boost::any &new_Value)=0
	appends a value new_Value to end of column
virtual bool	insert (const T &new_value)=0
virtual bool	update (TID tid, const boost::any &new_value)=0
	updates the value on position tid with a value new_Value
virtual bool	update (PositionListPtr tid, const boost::any &new_value)=0
	updates the values specified by the position list with a value new_Value
virtual bool	remove (TID tid)=0
	deletes the value on position tid
virtual bool	remove (PositionListPtr tid)=0
	deletes the values defined in the position list
virtual bool	clearContent ()=0
	deletes all values stored in the column
virtual const boost::any	get (TID tid)=0
	generic function for fetching a value form a column (slow)
virtual void	print () const =0 throw ()
	prints the content of a column
virtual size_t	size () const =0 throw ()
	returns the number of values (rows) in a column
virtual unsigned int	getSizeinBytes () const =0 throw ()
	returns the size in bytes the column consumes in main memory
virtual const ColumnPtr	copy () const =0
	virtual copy constructor
const ColumnPtr	gather (PositionListPtr tid_list)
	creates a new column by fetching all values identified by the tid_list
virtual bool	store (const std::string &path)=0
	store a column on the disc
virtual bool	load (const std::string &path)=0
	load column from disc
virtual bool	isMaterialized () const throw ()
	use this method to determine whether the column is materialized or a Lookup Column
virtual bool	isCompressed () const throw ()
	use this method to determine whether the column is materialized or a Lookup Column
const ColumnPtr	materialize () throw ()
	materializes a column to a normal uncompressed column with dense values
virtual T &	operator[] (const int index)=0
	defines operator[] for this class, which enables the user to thread all typed columns as arrays.

---

Detailed Description

template<class T>
class CoGaDB::CompressedColumn< T >

This class represents a compressed column with type T, is the base class for all compressed typed column classes and allows a uniform handling of compressed columns of a certain type T.

This class is indentended to be a base class, so it has a virtual destruktor and pure virtual methods, which need to be implemented in a derived class.

Author:

Sebastian Breß

Version:

0.2

Date:

2013

Copyright:

GNU LESSER GENERAL PUBLIC LICENSE - Version 3, http://www.gnu.org/licenses/lgpl-3.0.txt

---

Constructor & Destructor Documentation

template<class T >

CoGaDB::CompressedColumn< T >::CompressedColumn	(	const std::string &	name,
		AttributeType	db_type
	)

template<class T >

CoGaDB::CompressedColumn< T >::~CompressedColumn

(

)

[virtual]

template<class T>

CoGaDB::CompressedColumn< T >::CompressedColumn	(	const std::string &	name,
		AttributeType	db_type
	)

template<class T>

virtual CoGaDB::CompressedColumn< T >::~CompressedColumn

(

)

[virtual]

---

Member Function Documentation

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::clearContent

(

)

[pure virtual]

deletes all values stored in the column

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::clearContent

(

)

[pure virtual]

deletes all values stored in the column

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual const ColumnPtr CoGaDB::CompressedColumn< T >::copy

(

)

const [pure virtual]

virtual copy constructor

Returns:

a ColumnPtr to an exakt copy of the current column

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual const ColumnPtr CoGaDB::CompressedColumn< T >::copy

(

)

const [pure virtual]

virtual copy constructor

Returns:

a ColumnPtr to an exakt copy of the current column

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T >

const ColumnPtr CoGaDB::CompressedColumn< T >::gather

(

PositionListPtr

tid_list

)

[virtual]

creates a new column by fetching all values identified by the tid_list

Returns:

a ColumnPtr that contains only values from the tid_list

Implements CoGaDB::ColumnBaseTyped< T >.

References CoGaDB::ColumnBase::db_type_, CoGaDB::Column< T >::getContent(), and CoGaDB::ColumnBase::name_.

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template<class T>

virtual const boost::any CoGaDB::CompressedColumn< T >::get

(

TID

tid

)

[pure virtual]

generic function for fetching a value form a column (slow)

check whether the object is valid (e.g., when a tid is not valid, then the returned object is invalid as well)

Returns:

object of type boost::any containing the value on position tid

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual const boost::any CoGaDB::CompressedColumn< T >::get

(

TID

tid

)

[pure virtual]

generic function for fetching a value form a column (slow)

check whether the object is valid (e.g., when a tid is not valid, then the returned object is invalid as well)

Returns:

object of type boost::any containing the value on position tid

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual unsigned int CoGaDB::CompressedColumn< T >::getSizeinBytes

(

)

const throw () [pure virtual]

returns the size in bytes the column consumes in main memory

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual unsigned int CoGaDB::CompressedColumn< T >::getSizeinBytes

(

)

const throw () [pure virtual]

returns the size in bytes the column consumes in main memory

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::insert

(

const boost::any &

new_Value

)

[pure virtual]

appends a value new_Value to end of column

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::Test< std::string >, CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::Test< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::insert

(

const T &

new_value

)

[pure virtual]

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::Test< std::string >, CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::Test< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::insert

(

const boost::any &

new_Value

)

[pure virtual]

appends a value new_Value to end of column

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::Test< std::string >, CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::Test< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::insert

(

const T &

new_value

)

[pure virtual]

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::Test< std::string >, CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::Test< T >.

template<class T >

bool CoGaDB::CompressedColumn< T >::isCompressed

(

)

const throw () [virtual]

use this method to determine whether the column is materialized or a Lookup Column

Returns:

true in case the column is storing the compressed values and false otherwise.

Implements CoGaDB::ColumnBaseTyped< T >.

Reimplemented in CoGaDB::DictionaryCompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::isCompressed

(

)

const throw () [virtual]

use this method to determine whether the column is materialized or a Lookup Column

Returns:

true in case the column is storing the compressed values and false otherwise.

Implements CoGaDB::ColumnBaseTyped< T >.

Reimplemented in CoGaDB::DictionaryCompressedColumn< T >.

template<class T >

bool CoGaDB::CompressedColumn< T >::isMaterialized

(

)

const throw () [virtual]

use this method to determine whether the column is materialized or a Lookup Column

Returns:

true in case the column is storing the plain values (without compression) and false in case the column is a LookupColumn.

Implements CoGaDB::ColumnBaseTyped< T >.

Reimplemented in CoGaDB::DictionaryCompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::isMaterialized

(

)

const throw () [virtual]

use this method to determine whether the column is materialized or a Lookup Column

Returns:

true in case the column is storing the plain values (without compression) and false in case the column is a LookupColumn.

Implements CoGaDB::ColumnBaseTyped< T >.

Reimplemented in CoGaDB::DictionaryCompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::load

(

const std::string &

path

)

[pure virtual]

load column from disc

calling load on a column that is not empty yields undefined behaviour

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::load

(

const std::string &

path

)

[pure virtual]

load column from disc

calling load on a column that is not empty yields undefined behaviour

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T >

const ColumnPtr CoGaDB::CompressedColumn< T >::materialize

(

)

throw () [virtual]

materializes a column to a normal uncompressed column with dense values

Returns:

a ColumnPtr to an materialized column

Implements CoGaDB::ColumnBaseTyped< T >.

References CoGaDB::ColumnBase::db_type_, CoGaDB::Column< T >::getContent(), CoGaDB::ColumnBase::name_, and CoGaDB::CompressedColumn< T >::size().

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template<class T>

virtual T& CoGaDB::CompressedColumn< T >::operator[]

(

const int

index

)

[pure virtual]

defines operator[] for this class, which enables the user to thread all typed columns as arrays.

Note that this method is pure virtual, so it has to be defined in a derived class.

Returns:

a reference to the value at position index

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual T& CoGaDB::CompressedColumn< T >::operator[]

(

const int

index

)

[pure virtual]

defines operator[] for this class, which enables the user to thread all typed columns as arrays.

Note that this method is pure virtual, so it has to be defined in a derived class.

Returns:

a reference to the value at position index

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::RLECompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual void CoGaDB::CompressedColumn< T >::print

(

)

const throw () [pure virtual]

prints the content of a column

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual void CoGaDB::CompressedColumn< T >::print

(

)

const throw () [pure virtual]

prints the content of a column

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::remove

(

TID

tid

)

[pure virtual]

deletes the value on position tid

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::remove

(

TID

tid

)

[pure virtual]

deletes the value on position tid

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::remove

(

PositionListPtr

tid

)

[pure virtual]

deletes the values defined in the position list

assumes tid list is sorted ascending

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::remove

(

PositionListPtr

tid

)

[pure virtual]

deletes the values defined in the position list

assumes tid list is sorted ascending

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual size_t CoGaDB::CompressedColumn< T >::size

(

)

const throw () [pure virtual]

returns the number of values (rows) in a column

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

Referenced by CoGaDB::CompressedColumn< T >::materialize().

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template<class T>

virtual size_t CoGaDB::CompressedColumn< T >::size

(

)

const throw () [pure virtual]

returns the number of values (rows) in a column

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::store

(

const std::string &

path

)

[pure virtual]

store a column on the disc

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::store

(

const std::string &

path

)

[pure virtual]

store a column on the disc

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::update	(	TID	tid,
		const boost::any &	new_Value
	)		[pure virtual]

updates the value on position tid with a value new_Value

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::update	(	TID	tid,
		const boost::any &	new_Value
	)		[pure virtual]

updates the value on position tid with a value new_Value

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::update	(	PositionListPtr	tids,
		const boost::any &	new_value
	)		[pure virtual]

updates the values specified by the position list with a value new_Value

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

template<class T>

virtual bool CoGaDB::CompressedColumn< T >::update	(	PositionListPtr	tids,
		const boost::any &	new_value
	)		[pure virtual]

updates the values specified by the position list with a value new_Value

Returns:

true for sucess and false in case an error occured

Implements CoGaDB::ColumnBaseTyped< T >.

Implemented in CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::DeltaCompressedColumn< std::string >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::BitVectorCompressedColumn< T >, CoGaDB::DictionaryCompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, CoGaDB::RLECompressedColumn< T >, CoGaDB::DeltaCompressedColumn< T >, and CoGaDB::RLECompressedColumn< T >.

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

• /home/sebastian/gpudbms/trunk/cogadb/include/compression/tmp/db2/core/compressed_column.hpp
• /home/sebastian/gpudbms/trunk/cogadb/include/core/compressed_column.hpp