m::ColumnStore Struct Reference

This class implements a column store. More...

#include <ColumnStore.hpp>

Inheritance diagram for m::ColumnStore:

Collaboration diagram for m::ColumnStore:

Public Member Functions
	ColumnStore (const Table &table)
	~ColumnStore ()
virtual std::size_t	num_rows () const override
	Return the number of rows in this store.
std::size_t	row_size () const
	Returns the effective size of a row, in bits.
void	append () override
	Append a row to the store.
void	drop () override
	Drop the most recently appended row.
const memory::Memory &	memory () const override
	Returns the memory of the store.
void *	memory (std::size_t attr_id) const
	Returns the memory address where the column assigned to the attribute with id attr_id starts.
void	dump (std::ostream &out) const override
virtual void	dump (std::ostream &out) const=0
void	dump () const
const Table &	table () const

Static Public Attributes
static constexpr std::size_t	ALLOCATION_SIZE = 1UL << 30
	1 GiB

Private Attributes
memory::LinearAllocator	allocator_
	the memory allocator
memory::Memory	data_
std::size_t	num_rows_ = 0
std::size_t	capacity_
std::size_t	row_size_ = 0
const Table &	table_
	the table defining this store's schema

Detailed Description

This class implements a column store.

Definition at line 11 of file ColumnStore.hpp.

Constructor & Destructor Documentation

ColumnStore()

ColumnStore::ColumnStore

(

const Table &

table

)

Definition at line 11 of file ColumnStore.cpp.

References m::memory::LinearAllocator::allocate(), ALLOCATION_SIZE, allocator_, m::Table::begin_all(), capacity_, data_, m::Table::end_all(), m::Table::num_attrs(), row_size_, m::memory::Memory::size(), and m::Store::table().

~ColumnStore()

ColumnStore::~ColumnStore

(

)

Definition at line 33 of file ColumnStore.cpp.

Member Function Documentation

append()

void m::ColumnStore::append ( )

inlineoverridevirtual

Append a row to the store.

Implements m::Store.

Definition at line 35 of file ColumnStore.hpp.

References capacity_, and num_rows_.

drop()

void m::ColumnStore::drop ( )

inlineoverridevirtual

Drop the most recently appended row.

Implements m::Store.

Definition at line 41 of file ColumnStore.hpp.

References M_insist, and num_rows_.

dump() [1/3]

M_LCOV_EXCL_START void Store::dump

(

)

const

Definition at line 51 of file Store.cpp.

dump() [2/3]

M_LCOV_EXCL_START void ColumnStore::dump ( std::ostream &  out ) const

overridevirtual

Implements m::Store.

Definition at line 36 of file ColumnStore.cpp.

References capacity_, m::Table::name(), num_rows_, row_size_, and m::Store::table().

dump() [3/3]

virtual void m::Store::dump ( std::ostream &  out ) const

virtual

Implements m::Store.

memory() [1/2]

const memory::Memory & m::ColumnStore::memory ( ) const

inlineoverridevirtual

Returns the memory of the store.

Implements m::Store.

Definition at line 47 of file ColumnStore.hpp.

References data_.

memory() [2/2]

void * m::ColumnStore::memory ( std::size_t  attr_id ) const

inline

Returns the memory address where the column assigned to the attribute with id attr_id starts.

Return the address of the NULL bitmap column if attr_id == table().size().

Definition at line 50 of file ColumnStore.hpp.

References m::memory::Memory::addr(), ALLOCATION_SIZE, data_, M_insist, and m::Store::table().

num_rows()

virtual std::size_t m::ColumnStore::num_rows ( ) const

inlineoverridevirtual

Return the number of rows in this store.

Implements m::Store.

Definition at line 30 of file ColumnStore.hpp.

References num_rows_.

row_size()

std::size_t m::ColumnStore::row_size ( ) const

inline

Returns the effective size of a row, in bits.

Definition at line 33 of file ColumnStore.hpp.

References row_size_.

table()

const Table & m::Store::table ( ) const

inlineinherited

Definition at line 36 of file Store.hpp.

Referenced by ColumnStore(), m::PaxStore::compute_block_offsets(), m::RowStore::compute_offsets(), dump(), m::PaxStore::dump(), m::RowStore::dump(), memory(), m::PaxStore::offset(), m::RowStore::offset(), and m::ScanOperator::ScanOperator().

Field Documentation

ALLOCATION_SIZE

constexpr std::size_t m::ColumnStore::ALLOCATION_SIZE = 1UL << 30

staticconstexpr

1 GiB

Definition at line 14 of file ColumnStore.hpp.

Referenced by ColumnStore(), and memory().

allocator_

memory::LinearAllocator m::ColumnStore::allocator_

private

the memory allocator

Definition at line 20 of file ColumnStore.hpp.

Referenced by ColumnStore().

capacity_

std::size_t m::ColumnStore::capacity_

private

Definition at line 23 of file ColumnStore.hpp.

Referenced by append(), ColumnStore(), and dump().

data_

memory::Memory m::ColumnStore::data_

private

Definition at line 21 of file ColumnStore.hpp.

Referenced by ColumnStore(), and memory().

num_rows_

std::size_t m::ColumnStore::num_rows_ = 0

private

Definition at line 22 of file ColumnStore.hpp.

Referenced by append(), drop(), dump(), and num_rows().

row_size_

std::size_t m::ColumnStore::row_size_ = 0

private

Definition at line 24 of file ColumnStore.hpp.

Referenced by ColumnStore(), dump(), and row_size().

table_

const Table& m::Store::table_

privateinherited

the table defining this store's schema

Definition at line 24 of file Store.hpp.

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

• src/storage/ColumnStore.hpp
• src/storage/ColumnStore.cpp