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"

Classes
class	upd_get_nth_field_t_impl

Functions
upd_t *	upd_create (ulint n, mem_heap_t *heap)
	Creates an update vector object. More...
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...
void	upd_field_set_field_no (upd_field_t *upd_field, ulint field_no, const dict_index_t *index)
	Set which index field is updated by an update vector field. More...
void	upd_field_set_v_field_no (upd_field_t *upd_field, ulint field_no, const dict_index_t *index)
	Set for which virtual column the value is updated by an update vector field. More...
const upd_field_t *	upd_get_field_by_field_no (const upd_t *update, ulint no, bool is_virtual)
	Returns a field of an update vector by field_no. More...
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()

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  )

inline

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

Parameters

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

upd_create()

upd_t * upd_create ( ulint  n, mem_heap_t *  heap  )

inline

Creates an update vector object.

Parameters

[in]	n	number of fields
[in]	heap	heap from which memory allocated

Returns

own: update vector object

upd_field_set_field_no()

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

inline

Set which index field is updated by an update vector field.

Parameters

[in]	upd_field	update vector field
[in]	field_no	field position in index
[in]	index	index

upd_field_set_v_field_no()

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

inline

Set for which virtual column the value is updated by an update vector field.

Parameters

[in,out]	upd_field	update vector field
[in]	field_no	virtual column number in table
[in]	index	index

upd_get_field_by_field_no()

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

inline

Returns a field of an update vector by field_no.

Parameters

[in]	update	Update vector.
[in]	no	"Field number" as stored in the update vector: when is_virtual is false the position of the field in the updated index, otherwise the column number of the virtual field in table.

See also

upd_field::field_no

Parameters

[in]

is_virtual

If it is a virtual column.

Returns

update vector field, or nullptr.

upd_get_n_fields()

ulint upd_get_n_fields ( const upd_t *  update )

inline

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

Parameters

[in]

update

update vector

Returns

number of fields