dict0boot.h File Reference

Data dictionary creation and booting. More...

#include "univ.i"
#include "buf0buf.h"
#include "dict0dict.h"
#include "fsp0fsp.h"
#include "mtr0log.h"
#include "mtr0mtr.h"
#include "ut0byte.h"
#include "dict0boot.ic"

Go to the source code of this file.

Typedefs
typedef byte	dict_hdr_t

Functions
dict_hdr_t *	dict_hdr_get (mtr_t *mtr)
	Gets a pointer to the dictionary header and x-latches its page. More...
void	dict_hdr_get_new_id (table_id_t *table_id, space_index_t *index_id, space_id_t *space_id, const dict_table_t *table, bool disable_redo)
	Returns a new table, index, or space id. More...
static row_id_t	dict_sys_get_new_row_id ()
	Returns a new row id. More...
static row_id_t	dict_sys_read_row_id (const byte *field)
	Reads a row id from a record or other 6-byte stored form. More...
static void	dict_sys_write_row_id (byte *field, row_id_t row_id)
	Writes a row id to a record or other 6-byte stored form. More...
dberr_t	dict_boot ()
	Initializes the data dictionary memory structures when the database is started. More...
dberr_t	dict_create ()
	Creates and initializes the data dictionary at the server bootstrap. More...

Variables
constexpr uint32_t	DICT_HDR_FIRST_ID = 10
	the ids for tables etc. More...
constexpr uint32_t	DICT_HDR = FSEG_PAGE_DATA
constexpr uint32_t	DICT_HDR_ROW_ID = 0
	The latest assigned row id. More...
constexpr uint32_t	DICT_HDR_TABLE_ID = 8
	The latest assigned table id. More...
constexpr uint32_t	DICT_HDR_INDEX_ID = 16
	The latest assigned index id. More...
constexpr uint32_t	DICT_HDR_MAX_SPACE_ID = 24
	The latest assigned space id,or 0. More...
constexpr uint32_t	DICT_HDR_MIX_ID_LOW = 28
	Obsolete,always DICT_HDR_FIRST_ID. More...
constexpr uint32_t	DICT_HDR_FSEG_HEADER = 56
constexpr uint32_t	DICT_HDR_ROW_ID_WRITE_MARGIN = 256

Detailed Description

Data dictionary creation and booting.

Created 4/18/1996 Heikki Tuuri

Typedef Documentation

dict_hdr_t

typedef byte dict_hdr_t

Function Documentation

dict_boot()

dberr_t dict_boot

(

)

Initializes the data dictionary memory structures when the database is started.

This function is also called when the data dictionary is created.

Returns

DB_SUCCESS or error code.

dict_create()

dberr_t dict_create

(

)

Creates and initializes the data dictionary at the server bootstrap.

Returns

DB_SUCCESS or error code.

dict_hdr_get()

dict_hdr_t * dict_hdr_get

(

mtr_t *

mtr

)

Gets a pointer to the dictionary header and x-latches its page.

Returns

pointer to the dictionary header, page x-latched in: mtr

pointer to the dictionary header, page x-latched

Parameters

mtr

in: mtr

dict_hdr_get_new_id()

void dict_hdr_get_new_id	(	table_id_t *	table_id,
		space_index_t *	index_id,
		space_id_t *	space_id,
		const dict_table_t *	table,
		bool	disable_redo
	)

Returns a new table, index, or space id.

Parameters

[out]	table_id	Table id (not assigned if null)
[out]	index_id	Index id (not assigned if null)
[out]	space_id	Space id (not assigned if null)
[in]	table	Table
[in]	disable_redo	If true and table object is null then disable-redo

dict_sys_get_new_row_id()

static row_id_t dict_sys_get_new_row_id ( )

inlinestatic

Returns a new row id.

Returns

the new id

dict_sys_read_row_id()

static row_id_t dict_sys_read_row_id ( const byte *  field )

inlinestatic

Reads a row id from a record or other 6-byte stored form.

Returns

row id in: record field

dict_sys_write_row_id()

static void dict_sys_write_row_id ( byte *  field, row_id_t  row_id  )

inlinestatic

Writes a row id to a record or other 6-byte stored form.

Parameters

[in]	field	record field
[in]	row_id	row id

Variable Documentation

DICT_HDR

constexpr uint32_t DICT_HDR = FSEG_PAGE_DATA

constexpr

DICT_HDR_FIRST_ID

constexpr uint32_t DICT_HDR_FIRST_ID = 10

constexpr

the ids for tables etc.

start from this number, except for basic system tables and their above defined indexes; ibuf tables and indexes are assigned as the id the number DICT_IBUF_ID_MIN plus the space id

DICT_HDR_FSEG_HEADER

constexpr uint32_t DICT_HDR_FSEG_HEADER = 56

constexpr

DICT_HDR_INDEX_ID

constexpr uint32_t DICT_HDR_INDEX_ID = 16

constexpr

The latest assigned index id.

DICT_HDR_MAX_SPACE_ID

constexpr uint32_t DICT_HDR_MAX_SPACE_ID = 24

constexpr

The latest assigned space id,or 0.

DICT_HDR_MIX_ID_LOW

constexpr uint32_t DICT_HDR_MIX_ID_LOW = 28

constexpr

Obsolete,always DICT_HDR_FIRST_ID.

DICT_HDR_ROW_ID

constexpr uint32_t DICT_HDR_ROW_ID = 0

constexpr

The latest assigned row id.

DICT_HDR_ROW_ID_WRITE_MARGIN

constexpr uint32_t DICT_HDR_ROW_ID_WRITE_MARGIN = 256

constexpr

DICT_HDR_TABLE_ID

constexpr uint32_t DICT_HDR_TABLE_ID = 8

constexpr

The latest assigned table id.