Lob_diff Struct Reference

The modification done to the LOB. More...

#include <row0upd.h>

Public Member Functions
	Lob_diff (mem_heap_t *mem_heap)
	Constructor. More...
const byte *	read_offset (const byte *undo_ptr)
	Read the offset from the undo record. More...
const byte *	read_length (const byte *undo_ptr)
	Read the length from the undo record. More...
void	set_old_data (const byte *undo_ptr)
std::ostream &	print (std::ostream &out) const

Public Attributes
ulint	m_offset = 0
	The offset within LOB where partial update happened. More...
ulint	m_length = 0
	The length of the modification. More...
const byte *	m_old_data = nullptr
	Changes to the LOB data. More...
Lob_index_diff_vec *	m_idx_diffs
	Changes to the LOB index. More...
mem_heap_t *	heap
	Memory heap in which this object is allocated. More...

Detailed Description

The modification done to the LOB.

Constructor & Destructor Documentation

Lob_diff()

Lob_diff::Lob_diff ( mem_heap_t *  mem_heap )

inline

Constructor.

Parameters

[in]

mem_heap

the memory heap in which this object has been created.

Member Function Documentation

print()

std::ostream & Lob_diff::print ( std::ostream &  out ) const

inline

read_length()

const byte * Lob_diff::read_length ( const byte *  undo_ptr )

inline

Read the length from the undo record.

Parameters

[in]

undo_ptr

pointer into the undo log record.

Returns

pointer into the undo log record after length information.

read_offset()

const byte * Lob_diff::read_offset ( const byte *  undo_ptr )

inline

Read the offset from the undo record.

Parameters

[in]

undo_ptr

pointer into the undo log record.

Returns

pointer into the undo log record after offset.

set_old_data()

void Lob_diff::set_old_data ( const byte *  undo_ptr )

inline

Member Data Documentation

heap

mem_heap_t* Lob_diff::heap

Memory heap in which this object is allocated.

m_idx_diffs

Lob_index_diff_vec* Lob_diff::m_idx_diffs

Changes to the LOB index.

m_length

ulint Lob_diff::m_length = 0

The length of the modification.

m_offset

ulint Lob_diff::m_offset = 0

The offset within LOB where partial update happened.

m_old_data

const byte* Lob_diff::m_old_data = nullptr

Changes to the LOB data.

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

• storage/innobase/include/row0upd.h