MySQL 9.0.0
Source Code Documentation
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Undo information about LOB data alone without including LOB index. More...
#include <lob0undo.h>
Public Member Functions | |
void | apply (dict_index_t *index, byte *lob_mem, size_t len, size_t lob_version, page_no_t first_page_no) |
Apply the undo information to the given LOB. More... | |
const byte * | copy_old_data (const byte *undo_ptr, ulint len) |
Copy the old data from the undo page into this object. More... | |
void | destroy () |
Free allocated memory for old data. More... | |
std::ostream & | print (std::ostream &out) const |
Public Attributes | |
page_no_t | m_page_no = FIL_NULL |
The LOB first page number. More... | |
ulint | m_version = 0 |
The LOB version number on which this undo should be applied. More... | |
ulint | m_offset = 0 |
The offset within LOB where partial update happened. More... | |
ulint | m_length = 0 |
The length of the modification. More... | |
byte * | m_old_data = nullptr |
Changes to the LOB data. More... | |
Undo information about LOB data alone without including LOB index.
void lob::undo_data_t::apply | ( | dict_index_t * | index, |
byte * | lob_mem, | ||
size_t | len, | ||
size_t | lob_version, | ||
page_no_t | first_page_no | ||
) |
Apply the undo information to the given LOB.
[in] | index | clustered index containing the LOB. |
[in] | lob_mem | LOB on which the given undo will be applied. |
[in] | len | length of LOB. |
[in] | lob_version | lob version number |
[in] | first_page_no | the first page number of lob |
Copy the old data from the undo page into this object.
[in] | undo_ptr | the pointer into the undo log record. |
[in] | len | length of the old data. |
void lob::undo_data_t::destroy | ( | ) |
Free allocated memory for old data.
std::ostream & lob::undo_data_t::print | ( | std::ostream & | out | ) | const |
ulint lob::undo_data_t::m_length = 0 |
The length of the modification.
ulint lob::undo_data_t::m_offset = 0 |
The offset within LOB where partial update happened.
ulint lob::undo_data_t::m_version = 0 |
The LOB version number on which this undo should be applied.