IndexPurge Class Reference

Class that purges delete marked records from indexes, both secondary and cluster. More...

Public Member Functions
	IndexPurge (trx_t *trx, dict_index_t *index) 1
	Constructor. More...
	~IndexPurge () 1=default
	Destructor. More...
dberr_t	garbage_collect () 1
	Purge delete marked records. More...
ulint	get_n_rows () const 1
	The number of records that are not delete marked. More...

Protected Member Functions
	IndexPurge ()
	IndexPurge (const IndexPurge &)
IndexPurge &	operator= (const IndexPurge &)

Private Member Functions
void	open () 1
	Begin import, position the cursor on the first record. More...
void	close () 1
	Close the persistent curosr and commit the mini-transaction. More...
dberr_t	next () 1
	Position the cursor on the next record. More...
void	purge_pessimistic_delete () 1
	Store the persistent cursor position and reopen the B-tree cursor in BTR_MODIFY_TREE mode, because the tree structure may be changed during a pessimistic delete. More...
void	purge () 1
	Purge delete-marked records. More...

Private Attributes
trx_t *	m_trx
	User transaction. More...
mtr_t	m_mtr
	Mini-transaction. More...
btr_pcur_t	m_pcur
	Persistent cursor. More...
dict_index_t *	m_index
	Index to be processed. More...
ulint	m_n_rows
	Records in index. More...

Detailed Description

Class that purges delete marked records from indexes, both secondary and cluster.

It does a pessimistic delete. This should only be done if we couldn't purge the delete marked records during Phase I.

Constructor & Destructor Documentation

IndexPurge() [1/3]

IndexPurge::IndexPurge ( trx_t *  trx, dict_index_t *  index  )

inline

Constructor.

Parameters

trx	the user transaction covering the import tablespace
index	to be imported.

~IndexPurge()

IndexPurge::~IndexPurge ( )

default

Destructor.

IndexPurge() [2/3]

IndexPurge::IndexPurge ( )

protected

IndexPurge() [3/3]

IndexPurge::IndexPurge ( const IndexPurge &  )

protected

Member Function Documentation

close()

void IndexPurge::close ( void  )

private

Close the persistent curosr and commit the mini-transaction.

garbage_collect()

dberr_t IndexPurge::garbage_collect

(

)

Purge delete marked records.

Returns

DB_SUCCESS or error code.

get_n_rows()

ulint IndexPurge::get_n_rows ( ) const

inline

The number of records that are not delete marked.

Returns

total records in the index after purge

next()

dberr_t IndexPurge::next ( void  )

private

Position the cursor on the next record.

Returns

DB_SUCCESS or error code

open()

void IndexPurge::open ( )

private

Begin import, position the cursor on the first record.

operator=()

IndexPurge & IndexPurge::operator= ( const IndexPurge &  )

protected

purge()

void IndexPurge::purge ( )

private

Purge delete-marked records.

purge_pessimistic_delete()

void IndexPurge::purge_pessimistic_delete ( )

private

Store the persistent cursor position and reopen the B-tree cursor in BTR_MODIFY_TREE mode, because the tree structure may be changed during a pessimistic delete.

Member Data Documentation

m_index

dict_index_t* IndexPurge::m_index

private

Index to be processed.

m_mtr

mtr_t IndexPurge::m_mtr

private

Mini-transaction.

m_n_rows

ulint IndexPurge::m_n_rows

private

Records in index.

m_pcur

btr_pcur_t IndexPurge::m_pcur

private

Persistent cursor.

m_trx

trx_t* IndexPurge::m_trx

private

User transaction.

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

• storage/innobase/row/row0import.cc