row0upd.ic File Reference

Update of a row. More...

#include "mtr0log.h"
#include "lock0lock.h"
#include "row0row.h"
#include "trx0trx.h"
#include "trx0undo.h"
#include "page0zip.h"

Functions
static upd_t *	upd_create (ulint n, mem_heap_t *heap)
	Creates an update vector object. More...
static ulint	upd_get_n_fields (const upd_t *update)
	Returns the number of fields in the update vector == number of columns to be updated by an update vector. More...
static upd_field_t *	upd_get_nth_field (const upd_t *update, ulint n)
	Returns the nth field of an update vector. More...
static void	upd_field_set_field_no (upd_field_t *upd_field, ulint field_no, const dict_index_t *index)
static void	upd_field_set_v_field_no (upd_field_t *upd_field, ulint field_no, const dict_index_t *index)
	set field number to a update vector field, marks this field is updated. More...
static const upd_field_t *	upd_get_field_by_field_no (const upd_t *update, ulint no, bool is_virtual)
static void	row_upd_rec_sys_fields (rec_t *rec, page_zip_des_t *page_zip, const dict_index_t *index, const ulint *offsets, const trx_t *trx, roll_ptr_t roll_ptr)
	Updates the trx id and roll ptr field in a clustered index record when a row is updated or marked deleted. More...

Detailed Description

Update of a row.

Created 12/27/1996 Heikki Tuuri

Function Documentation

row_upd_rec_sys_fields()

static void row_upd_rec_sys_fields ( rec_t *  rec, page_zip_des_t *  page_zip, const dict_index_t *  index, const ulint *  offsets, const trx_t *  trx, roll_ptr_t  roll_ptr  )

inlinestatic

Updates the trx id and roll ptr field in a clustered index record when a row is updated or marked deleted.

Parameters

rec	in/out: record
page_zip	in/out: compressed page whose uncompressed part will be updated, or NULL
index	in: clustered index
offsets	in: rec_get_offsets(rec, index)
trx	in: transaction
roll_ptr	in: roll ptr of the undo log record, can be 0 during IMPORT

upd_create()

static upd_t * upd_create ( ulint  n, mem_heap_t *  heap  )

inlinestatic

Creates an update vector object.

Returns

own: update vector object

Parameters

n	in: number of fields
heap	in: heap from which memory allocated

upd_field_set_field_no()

static void upd_field_set_field_no ( upd_field_t *  upd_field, ulint  field_no, const dict_index_t *  index  )

inlinestatic

upd_field_set_v_field_no()

static void upd_field_set_v_field_no ( upd_field_t *  upd_field, ulint  field_no, const dict_index_t *  index  )

inlinestatic

set field number to a update vector field, marks this field is updated.

Parameters

[in,out]	upd_field	update vector field
[in]	field_no	virtual column sequence num
[in]	index	index

upd_get_field_by_field_no()

static const upd_field_t * upd_get_field_by_field_no ( const upd_t *  update, ulint  no, bool  is_virtual  )

inlinestatic

upd_get_n_fields()

static ulint upd_get_n_fields ( const upd_t *  update )

inlinestatic

Returns the number of fields in the update vector == number of columns to be updated by an update vector.

Returns

number of fields

Parameters

update

in: update vector

upd_get_nth_field()

static upd_field_t * upd_get_nth_field ( const upd_t *  update, ulint  n  )

inlinestatic

Returns the nth field of an update vector.

Returns

update vector field

Parameters

update	in: update vector
n	in: field position in update vector