upd_field_t Struct Reference

#include <row0upd.h>

Public Member Functions
	upd_field_t ()
bool	is_virtual () const
void	push_lob_diff (const Lob_diff &lob_diff)
std::ostream &	print (std::ostream &out) const
void	reset ()
	Empty the information collected on LOB diffs. More...

Public Attributes
unsigned	field_no: 16
	field number in an index, usually the clustered index, but in updating a secondary index record in btr0cur.cc this is the position in the secondary index, also it could be the position in virtual index for virtual column More...
uint16_t	field_phy_pos {UINT16_MAX}
unsigned	orig_len: 16
	original length of the locally stored part of an externally stored column, or 0 More...
que_node_t *	exp
	expression for calculating a new value: it refers to column values and constants in the symbol table of the query graph More...
dfield_t	old_val
	old value for the column More...
dfield_t	new_val
	new value for the column More...
dfield_t *	old_v_val
	old value for the virtual column More...
Field *	mysql_field
	the mysql field object. More...
bool	ext_in_old
	If true, the field was stored externally in the old row. More...
Lob_diff_vector *	lob_diffs
	List of changes done to this updated field. More...
page_no_t	lob_first_page_no
	The LOB first page number. More...
ulint	lob_version
trx_id_t	last_trx_id
	The last trx that modified the LOB. More...
undo_no_t	last_undo_no
	The last stmt within trx that modified the LOB. More...
mem_heap_t *	heap
	Memory heap in which this object is allocated. More...

Constructor & Destructor Documentation

upd_field_t()

upd_field_t::upd_field_t ( )

inline

Member Function Documentation

is_virtual()

bool upd_field_t::is_virtual ( ) const

inline

print()

std::ostream & upd_field_t::print

(

std::ostream &

out

)

const

push_lob_diff()

void upd_field_t::push_lob_diff ( const Lob_diff &  lob_diff )

inline

reset()

void upd_field_t::reset ( void  )

inline

Empty the information collected on LOB diffs.

Member Data Documentation

exp

que_node_t* upd_field_t::exp

expression for calculating a new value: it refers to column values and constants in the symbol table of the query graph

ext_in_old

bool upd_field_t::ext_in_old

If true, the field was stored externally in the old row.

field_no

unsigned upd_field_t::field_no

field number in an index, usually the clustered index, but in updating a secondary index record in btr0cur.cc this is the position in the secondary index, also it could be the position in virtual index for virtual column

field_phy_pos

uint16_t upd_field_t::field_phy_pos {UINT16_MAX}

heap

mem_heap_t* upd_field_t::heap

Memory heap in which this object is allocated.

last_trx_id

trx_id_t upd_field_t::last_trx_id

The last trx that modified the LOB.

last_undo_no

undo_no_t upd_field_t::last_undo_no

The last stmt within trx that modified the LOB.

lob_diffs

Lob_diff_vector* upd_field_t::lob_diffs

List of changes done to this updated field.

This is usually populated from the undo log.

lob_first_page_no

page_no_t upd_field_t::lob_first_page_no

The LOB first page number.

This information is read from the undo log.

lob_version

ulint upd_field_t::lob_version

mysql_field

Field* upd_field_t::mysql_field

the mysql field object.

new_val

dfield_t upd_field_t::new_val

new value for the column

old_v_val

dfield_t* upd_field_t::old_v_val

old value for the virtual column

old_val

dfield_t upd_field_t::old_val

old value for the column

orig_len

unsigned upd_field_t::orig_len

original length of the locally stored part of an externally stored column, or 0

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The documentation for this struct was generated from the following files:

• storage/innobase/include/row0upd.h
• storage/innobase/row/row0upd.cc