lob::undo_seq_t Struct Reference

Container to hold a sequence of undo log records containing modification of BLOBs. More...

#include <lob0undo.h>

Public Member Functions
	undo_seq_t (ulint field_no)
	Constructor. More...
void	apply (dict_index_t *index, byte *lob, size_t len, size_t lob_version, page_no_t first_page_no)
	Apply the undo log records on the given LOB in memory. More...
ulint	get_field_no () const
	Get the field number of BLOB. More...
void	push_back (undo_data_t &u1)
	Append the given undo log record to the end of container. More...
void	destroy ()
	Destroy the contents of this undo sequence list. More...
bool	exists () const
	Check if any undo log exists to apply. More...

Public Attributes
ulint	m_field_no

Private Attributes
std::list< undo_data_t > *	m_undo_list = nullptr

Detailed Description

Container to hold a sequence of undo log records containing modification of BLOBs.

Constructor & Destructor Documentation

undo_seq_t()

lob::undo_seq_t::undo_seq_t ( ulint  field_no )

inline

Constructor.

Parameters

[in]

field_no

the field number of LOB.

Member Function Documentation

apply()

void lob::undo_seq_t::apply ( dict_index_t *  index, byte *  lob, size_t  len, size_t  lob_version, page_no_t  first_page_no  )

inline

Apply the undo log records on the given LOB in memory.

Parameters

[in]	index	the clustered index to which LOB belongs.
[in]	lob	the BLOB in memory.
[in]	len	the length of BLOB in memory.
[in]	lob_version	the LOB version number.
[in]	first_page_no	the first page number of BLOB.

destroy()

void lob::undo_seq_t::destroy ( )

inline

Destroy the contents of this undo sequence list.

exists()

bool lob::undo_seq_t::exists ( ) const

inline

Check if any undo log exists to apply.

get_field_no()

ulint lob::undo_seq_t::get_field_no ( ) const

inline

Get the field number of BLOB.

Returns

the field number of BLOB.

push_back()

void lob::undo_seq_t::push_back ( undo_data_t &  u1 )

inline

Append the given undo log record to the end of container.

Parameters

[in]

u1

the undo log record information.

Member Data Documentation

m_field_no

ulint lob::undo_seq_t::m_field_no

m_undo_list

std::list<undo_data_t>* lob::undo_seq_t::m_undo_list = nullptr

private

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

• storage/innobase/include/lob0undo.h