#include "trx0rec.h"
#include "fsp0fsp.h"
#include "mach0data.h"
#include "trx0undo.h"
#include "mtr0log.h"
#include "dict0dict.h"
#include "ut0mem.h"
#include "read0read.h"
#include "row0ext.h"
#include "row0upd.h"
#include "que0que.h"
#include "trx0purge.h"
#include "trx0rseg.h"
#include "row0row.h"

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Macros
#define	ATTRIB_USED_ONLY_IN_DEBUG __attribute__((unused))

Functions
UNIV_INLINE void	trx_undof_page_add_undo_rec_log (page_t undo_page, ulint old_free, ulint new_free, mtr_t mtr)
UNIV_INTERN byte *	trx_undo_parse_add_undo_rec (byte ptr, byte end_ptr, page_t *page)
UNIV_INLINE ulint	trx_undo_left (const page_t page, const byte ptr)
UNIV_INTERN byte *	trx_undo_rec_get_pars (trx_undo_rec_t undo_rec, ulint type, ulint cmpl_info, bool updated_extern, undo_no_t undo_no, table_id_t table_id)
UNIV_INTERN byte *	trx_undo_rec_get_row_ref (byte ptr, dict_index_t index, dtuple_t *ref, mem_heap_t heap)
UNIV_INTERN byte *	trx_undo_rec_skip_row_ref (byte ptr, dict_index_t index)
UNIV_INTERN byte *	trx_undo_update_rec_get_sys_cols (byte ptr, trx_id_t trx_id, roll_ptr_t roll_ptr, ulint info_bits)
UNIV_INLINE byte *	trx_undo_update_rec_get_n_upd_fields (byte ptr, ulint n)
UNIV_INLINE byte *	trx_undo_update_rec_get_field_no (byte ptr, ulint field_no)
UNIV_INTERN byte *	trx_undo_update_rec_get_update (byte ptr, dict_index_t index, ulint type, trx_id_t trx_id, roll_ptr_t roll_ptr, ulint info_bits, trx_t trx, mem_heap_t heap, upd_t **upd)
UNIV_INTERN byte *	trx_undo_rec_get_partial_row (byte ptr, dict_index_t index, dtuple_t *row, ibool ignore_prefix, mem_heap_t heap)

Detailed Description

Transaction undo log record

Created 3/26/1996 Heikki Tuuri

Definition in file trx0rec.cc.

Function Documentation

UNIV_INLINE ulint trx_undo_left	(	const page_t *	page,
		const byte *	ptr
	)

Calculates the free space left for extending an undo log record.

Returns: bytes left

Parameters

page	in: undo log page
ptr	in: pointer to page

Definition at line 143 of file trx0rec.cc.

UNIV_INTERN byte* trx_undo_parse_add_undo_rec	(	byte *	ptr,
		byte *	end_ptr,
		page_t *	page
	)

Parses a redo log record of adding an undo log record.

Returns: end of log record or NULL

Parameters

ptr	in: buffer
end_ptr	in: buffer end
page	in: page or NULL

Definition at line 95 of file trx0rec.cc.

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UNIV_INTERN byte* trx_undo_rec_get_pars	(	trx_undo_rec_t *	undo_rec,
		ulint *	type,
		ulint *	cmpl_info,
		bool *	updated_extern,
		undo_no_t *	undo_no,
		table_id_t *	table_id
	)

Reads from an undo log record the general parameters.

Returns: remaining part of undo log record after reading these values

Parameters

undo_rec	in: undo log record
type	out: undo record type: TRX_UNDO_INSERT_REC, ...
cmpl_info	out: compiler info, relevant only for update type records
updated_extern	out: true if we updated an externally stored fild
undo_no	out: undo log record number
table_id	out: table id

Definition at line 283 of file trx0rec.cc.

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UNIV_INTERN byte* trx_undo_rec_get_partial_row	(	byte *	ptr,
		dict_index_t *	index,
		dtuple_t **	row,
		ibool	ignore_prefix,
		mem_heap_t *	heap
	)

Builds a partial row from an update undo log record, for purge. It contains the columns which occur as ordering in any index of the table. Any missing columns are indicated by col->mtype == DATA_MISSING.

Returns: pointer to remaining part of undo record

Parameters

ptr	in: remaining part in update undo log record of a suitable type, at the start of the stored index columns; NOTE that this copy of the undo log record must be preserved as long as the partial row is used, as we do NOT copy the data in the record!
index	in: clustered index
row	out, own: partial row
ignore_prefix	in: flag to indicate if we expect blob prefixes in undo. Used only in the assertion.
heap	in: memory heap from which the memory needed is allocated

Definition at line 1046 of file trx0rec.cc.

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UNIV_INTERN byte* trx_undo_rec_get_row_ref	(	byte *	ptr,
		dict_index_t *	index,
		dtuple_t **	ref,
		mem_heap_t *	heap
	)

Builds a row reference from an undo log record.

Returns: pointer to remaining part of undo record

Parameters

ptr	in: remaining part of a copy of an undo log record, at the start of the row reference; NOTE that this copy of the undo log record must be preserved as long as the row reference is used, as we do NOT copy the data in the record!
index	in: clustered index
ref	out, own: row reference
heap	in: memory heap from which the memory needed is allocated

Definition at line 378 of file trx0rec.cc.

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UNIV_INTERN byte* trx_undo_rec_skip_row_ref	(	byte *	ptr,
		dict_index_t *	index
	)

Skips a row reference from an undo log record.

Returns: pointer to remaining part of undo record

Parameters

ptr	in: remaining part in update undo log record, at the start of the row reference
index	in: clustered index

Definition at line 424 of file trx0rec.cc.

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UNIV_INLINE byte* trx_undo_update_rec_get_field_no	(	byte *	ptr,
		ulint *	field_no
	)

Reads from an update undo log record a stored field number.

Returns: remaining part of undo log record after reading this value

Parameters

ptr	in: pointer to remaining part of undo log record
field_no	out: field number

Definition at line 901 of file trx0rec.cc.

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UNIV_INLINE byte* trx_undo_update_rec_get_n_upd_fields	(	byte *	ptr,
		ulint *	n
	)

Reads from an update undo log record the number of updated fields.

Returns: remaining part of undo log record after reading this value

Parameters

ptr	in: pointer to remaining part of undo log record
n	out: number of fields

Definition at line 885 of file trx0rec.cc.

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UNIV_INTERN byte* trx_undo_update_rec_get_sys_cols	(	byte *	ptr,
		trx_id_t *	trx_id,
		roll_ptr_t *	roll_ptr,
		ulint *	info_bits
	)

Reads from an undo log update record the system field values of the old version.

Returns: remaining part of undo log record after reading these values

Parameters

ptr	in: remaining part of undo log record after reading general parameters
trx_id	out: trx id
roll_ptr	out: roll ptr
info_bits	out: info bits state

Definition at line 856 of file trx0rec.cc.

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UNIV_INTERN byte* trx_undo_update_rec_get_update	(	byte *	ptr,
		dict_index_t *	index,
		ulint	type,
		trx_id_t	trx_id,
		roll_ptr_t	roll_ptr,
		ulint	info_bits,
		trx_t *	trx,
		mem_heap_t *	heap,
		upd_t **	upd
	)

Builds an update vector based on a remaining part of an undo log record.

Returns: remaining part of the record, NULL if an error detected, which means that the record is corrupted

Parameters

ptr	in: remaining part in update undo log record, after reading the row reference NOTE that this copy of the undo log record must be preserved as long as the update vector is used, as we do NOT copy the data in the record!
index	in: clustered index
type	in: TRX_UNDO_UPD_EXIST_REC, TRX_UNDO_UPD_DEL_REC, or TRX_UNDO_DEL_MARK_REC; in the last case, only trx id and roll ptr fields are added to the update vector
trx_id	in: transaction id from this undo record
roll_ptr	in: roll pointer from this undo record
info_bits	in: info bits from this undo record
trx	in: transaction
heap	in: memory heap from which the memory needed is allocated
upd	out, own: update vector

Definition at line 918 of file trx0rec.cc.

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UNIV_INLINE void trx_undof_page_add_undo_rec_log	(	page_t *	undo_page,
		ulint	old_free,
		ulint	new_free,
		mtr_t *	mtr
	)

Writes the mtr log entry of the inserted undo log record on the undo log page.

Parameters

undo_page	in: undo log page
old_free	in: start offset of the inserted entry
new_free	in: end offset of the entry
mtr	in: mtr

Definition at line 54 of file trx0rec.cc.

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Macros

Functions

Detailed Description

Function Documentation