#include <row0purge.h>

Classes
struct	rec_t
	Info required to purge a record. More...

Public Types
using	Recs = std::list< rec_t, mem_heap_allocator< rec_t > >

Public Member Functions
void	init ()

void	deinit ()

void	add_lob_page (dict_index_t *index, const page_id_t &page_id)
	Add an LOB page to the list of pages that will be freed at the end of a purge batch. More...

void	free_lob_pages ()
	Free the LOB first pages at end of purge batch. More...

bool	is_table_id_exists (table_id_t table_id) const
	Check if undo records of given table_id is there in this purge node. More...

bool	check_duplicate_undo_no () const
	Check if there are more than one undo record with same (trx_id, undo_no) combination. More...

bool	validate_pcur ()
	Validate the persistent cursor. More...

Public Attributes
que_common_t	common
	node type: QUE_NODE_PURGE More...

roll_ptr_t	roll_ptr
	roll pointer to undo log record More...

undo_no_t	undo_no
	undo number of the record More...

ulint	rec_type
	undo log record type: TRX_UNDO_INSERT_REC, ... More...

dict_table_t *	table
	table where purge is done More...

MDL_ticket *	mdl
	MDL ticket for the table name. More...

dict_table_t *	parent
	parent table for an FTS AUX TABLE More...

MDL_ticket *	parent_mdl
	MDL ticket for the parent table of an FTS AUX TABLE. More...

TABLE *	mysql_table
	MySQL table instance. More...

ulint	cmpl_info
	compiler analysis info of an update More...

upd_t *	update
	update vector for a clustered index record More...

dtuple_t *	ref
	NULL, or row reference to the next row to handle. More...

dtuple_t *	row
	NULL, or a copy (also fields copied to heap) of the indexed fields of the row to handle. More...

dict_index_t *	index
	NULL, or the next index whose record should be handled. More...

mem_heap_t *	heap
	The heap is owned by purge_sys and is reset after a purge batch has completed. More...

bool	found_clust
	true if the clustered index record determined by ref was found in the clustered index, and we were able to position pcur on it More...

btr_pcur_t	pcur
	persistent cursor used in searching the clustered index record More...

bool	done
	Debug flag. More...

trx_id_t	trx_id
	trx id for this purging record More...

trx_id_t	modifier_trx_id
	trx id for this purging record More...

Recs *	recs
	Undo recs to purge. More...

trx_rseg_t *	rseg

Private Types
using	LOB_free_set = std::set< Page_free_tuple, Compare_page_free_tuple, ut::allocator< Page_free_tuple > >

Private Attributes
LOB_free_set	m_lob_pages
	Set of LOB first pages that are to be freed. More...

Member Typedef Documentation

◆ LOB_free_set

using purge_node_t::LOB_free_set = std::set<Page_free_tuple, Compare_page_free_tuple, ut::allocator<Page_free_tuple> >

private

◆ Recs

using purge_node_t::Recs = std::list<rec_t, mem_heap_allocator<rec_t> >

Member Function Documentation

◆ add_lob_page()

void purge_node_t::add_lob_page	(	dict_index_t *	index,
		const page_id_t &	page_id
	)

Add an LOB page to the list of pages that will be freed at the end of a purge batch.

Parameters

[in]	index	the clust index to which the LOB belongs.
[in]	page_id	the page_id of the first page of the LOB.

◆ check_duplicate_undo_no()

bool purge_node_t::check_duplicate_undo_no ( ) const

Check if there are more than one undo record with same (trx_id, undo_no) combination.

Returns: true when no duplicates are found, false otherwise.

◆ deinit()

void purge_node_t::deinit ( void )

inline

◆ free_lob_pages()

void purge_node_t::free_lob_pages ( )

Free the LOB first pages at end of purge batch.

Since this function acquires shared MDL table locks, the caller should not hold any latches.

Ensure that the caller does not hold any latches.

◆ init()

void purge_node_t::init ( void )

inline

◆ is_table_id_exists()

bool purge_node_t::is_table_id_exists ( table_id_t table_id ) const

Check if undo records of given table_id is there in this purge node.

Parameters

[in] table_id look for undo records of this table id.

Returns: true if undo records of table id exists, false otherwise.

◆ validate_pcur()

bool purge_node_t::validate_pcur ( )

Validate the persistent cursor.

Validate the persisent cursor.

The purge node has two references to the clustered index record - one via the ref member, and the other via the persistent cursor. These two references must match each other if the found_clust flag is set.

Returns: true if the persistent cursor is consistent with the ref member.

The purge node has two references to the clustered index record - one via the ref member, and the other via the persistent cursor. These two references must match each other if the found_clust flag is set.

Returns: true if the stored copy of persistent cursor is consistent with the ref member.

Member Data Documentation

◆ cmpl_info

ulint purge_node_t::cmpl_info

compiler analysis info of an update

◆ common

que_common_t purge_node_t::common

node type: QUE_NODE_PURGE

◆ done

bool purge_node_t::done

Debug flag.

◆ found_clust

bool purge_node_t::found_clust

true if the clustered index record determined by ref was found in the clustered index, and we were able to position pcur on it

◆ heap

mem_heap_t* purge_node_t::heap

The heap is owned by purge_sys and is reset after a purge batch has completed.

◆ index

dict_index_t* purge_node_t::index

NULL, or the next index whose record should be handled.

◆ m_lob_pages

LOB_free_set purge_node_t::m_lob_pages

private

Set of LOB first pages that are to be freed.

◆ mdl

MDL_ticket* purge_node_t::mdl

MDL ticket for the table name.

◆ modifier_trx_id

trx_id_t purge_node_t::modifier_trx_id

trx id for this purging record

◆ mysql_table

TABLE* purge_node_t::mysql_table

MySQL table instance.

◆ parent

dict_table_t* purge_node_t::parent

parent table for an FTS AUX TABLE

◆ parent_mdl

MDL_ticket* purge_node_t::parent_mdl

MDL ticket for the parent table of an FTS AUX TABLE.

◆ pcur

btr_pcur_t purge_node_t::pcur

persistent cursor used in searching the clustered index record

◆ rec_type

ulint purge_node_t::rec_type

undo log record type: TRX_UNDO_INSERT_REC, ...

◆ recs

Recs* purge_node_t::recs

Undo recs to purge.

◆ ref

dtuple_t* purge_node_t::ref

NULL, or row reference to the next row to handle.

◆ roll_ptr

roll_ptr_t purge_node_t::roll_ptr

roll pointer to undo log record

◆ row

dtuple_t* purge_node_t::row

NULL, or a copy (also fields copied to heap) of the indexed fields of the row to handle.

◆ rseg

trx_rseg_t* purge_node_t::rseg

◆ table

dict_table_t* purge_node_t::table

table where purge is done

◆ trx_id

trx_id_t purge_node_t::trx_id