oceanbase::TableIterator类 参考

类 oceanbase::TableIterator 继承关系图:

Public 成员函数
	TableIterator (const shared_ptr< ObSSTable > &sst)
void	seek (const string_view &key) override
	Positions the iterator at the first entry with a key greater than or equal to the specified key. 更多...
void	seek_to_first () override
	Positions the iterator at the first key-value pair in the source. 更多...
void	seek_to_last () override
	Positions the iterator at the last key-value pair in the source. 更多...
void	next () override
	Moves the iterator to the next key-value pair in the source. 更多...
bool	valid () const override
	Checks if the iterator is currently positioned at a valid key-value pair. 更多...
string_view	key () const override
	Returns the key of the current entry the iterator is positioned at. 更多...
string_view	value () const override
	Returns the value of the current entry the iterator is positioned at. 更多...
Public 成员函数 继承自 oceanbase::ObLsmIterator
	ObLsmIterator (const ObLsmIterator &)=delete
ObLsmIterator &	operator= (const ObLsmIterator &)=delete
virtual bool	valid () const =0
	Checks if the iterator is currently positioned at a valid key-value pair. 更多...
virtual void	next ()=0
	Moves the iterator to the next key-value pair in the source. 更多...
virtual string_view	key () const =0
	Returns the key of the current entry the iterator is positioned at. 更多...
virtual string_view	value () const =0
	Returns the value of the current entry the iterator is positioned at. 更多...
virtual void	seek (const string_view &k)=0
	Positions the iterator at the first entry with a key greater than or equal to the specified key. 更多...
virtual void	seek_to_first ()=0
	Positions the iterator at the first key-value pair in the source. 更多...
virtual void	seek_to_last ()=0
	Positions the iterator at the last key-value pair in the source. 更多...

Private 成员函数
void	read_block_with_cache ()

Private 属性
const shared_ptr< ObSSTable >	sst_
uint32_t	block_cnt_ = 0
uint32_t	curr_block_idx_ = 0
shared_ptr< ObBlock >	block_
unique_ptr< ObLsmIterator >	block_iterator_

成员函数说明

key()

string_view oceanbase::TableIterator::key ( ) const

inlineoverridevirtual

Returns the key of the current entry the iterator is positioned at.

This method retrieves the key corresponding to the key-value pair at the current position of the iterator.

返回

A string_view containing the key of the current entry.

实现了 oceanbase::ObLsmIterator.

next()

void oceanbase::TableIterator::next ( )

overridevirtual

Moves the iterator to the next key-value pair in the source.

实现了 oceanbase::ObLsmIterator.

seek()

void oceanbase::TableIterator::seek ( const string_view &  k )

overridevirtual

Positions the iterator at the first entry with a key greater than or equal to the specified key.

参数

k	The key to search for.

实现了 oceanbase::ObLsmIterator.

seek_to_first()

void oceanbase::TableIterator::seek_to_first ( )

overridevirtual

Positions the iterator at the first key-value pair in the source.

实现了 oceanbase::ObLsmIterator.

seek_to_last()

void oceanbase::TableIterator::seek_to_last ( )

overridevirtual

Positions the iterator at the last key-value pair in the source.

实现了 oceanbase::ObLsmIterator.

valid()

bool oceanbase::TableIterator::valid ( ) const

inlineoverridevirtual

Checks if the iterator is currently positioned at a valid key-value pair.

返回

true if the iterator is valid, false otherwise.

实现了 oceanbase::ObLsmIterator.

value()

string_view oceanbase::TableIterator::value ( ) const

inlineoverridevirtual

Returns the value of the current entry the iterator is positioned at.

This method retrieves the value corresponding to the key-value pair at the current position of the iterator.

返回

A string_view containing the value of the current entry.

实现了 oceanbase::ObLsmIterator.

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该类的文档由以下文件生成:

• src/oblsm/table/ob_sstable.h
• src/oblsm/table/ob_sstable.cpp