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/******************************************************
Data dictionary creation and booting
(c) 1996 Innobase Oy
Created 4/18/1996 Heikki Tuuri
*******************************************************/
#ifndef dict0boot_h
#define dict0boot_h
#include "univ.i"
#include "mtr0mtr.h"
#include "mtr0log.h"
#include "ut0byte.h"
#include "buf0buf.h"
#include "fsp0fsp.h"
#include "dict0dict.h"
typedef byte dict_hdr_t;
/**************************************************************************
Gets a pointer to the dictionary header and x-latches its page. */
dict_hdr_t*
dict_hdr_get(
/*=========*/
/* out: pointer to the dictionary header,
page x-latched */
mtr_t* mtr); /* in: mtr */
/**************************************************************************
Returns a new row, table, index, or tree id. */
dulint
dict_hdr_get_new_id(
/*================*/
/* out: the new id */
ulint type); /* in: DICT_HDR_ROW_ID, ... */
/**************************************************************************
Returns a new row id. */
UNIV_INLINE
dulint
dict_sys_get_new_row_id(void);
/*=========================*/
/* out: the new id */
/**************************************************************************
Reads a row id from a record or other 6-byte stored form. */
UNIV_INLINE
dulint
dict_sys_read_row_id(
/*=================*/
/* out: row id */
byte* field); /* in: record field */
/**************************************************************************
Writes a row id to a record or other 6-byte stored form. */
UNIV_INLINE
void
dict_sys_write_row_id(
/*==================*/
byte* field, /* in: record field */
dulint row_id);/* in: row id */
/*********************************************************************
Initializes the data dictionary memory structures when the database is
started. This function is also called when the data dictionary is created. */
void
dict_boot(void);
/*===========*/
/*********************************************************************
Creates and initializes the data dictionary at the database creation. */
void
dict_create(void);
/*=============*/
/* Space id and page no where the dictionary header resides */
#define DICT_HDR_SPACE 0 /* the SYSTEM tablespace */
#define DICT_HDR_PAGE_NO FSP_DICT_HDR_PAGE_NO
/* The ids for the basic system tables and their indexes */
#define DICT_TABLES_ID ut_dulint_create(0, 1)
#define DICT_COLUMNS_ID ut_dulint_create(0, 2)
#define DICT_INDEXES_ID ut_dulint_create(0, 3)
#define DICT_FIELDS_ID ut_dulint_create(0, 4)
/* The following is a secondary index on SYS_TABLES */
#define DICT_TABLE_IDS_ID ut_dulint_create(0, 5)
#define DICT_HDR_FIRST_ID 10 /* 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 */
#define DICT_IBUF_ID_MIN ut_dulint_create(0xFFFFFFFFUL, 0)
/* The offset of the dictionary header on the page */
#define DICT_HDR FSEG_PAGE_DATA
/*-------------------------------------------------------------*/
/* Dictionary header offsets */
#define DICT_HDR_ROW_ID 0 /* The latest assigned row id */
#define DICT_HDR_TABLE_ID 8 /* The latest assigned table id */
#define DICT_HDR_INDEX_ID 16 /* The latest assigned index id */
#define DICT_HDR_MIX_ID 24 /* Obsolete, always 0. */
#define DICT_HDR_TABLES 32 /* Root of the table index tree */
#define DICT_HDR_TABLE_IDS 36 /* Root of the table index tree */
#define DICT_HDR_COLUMNS 40 /* Root of the column index tree */
#define DICT_HDR_INDEXES 44 /* Root of the index index tree */
#define DICT_HDR_FIELDS 48 /* Root of the index field
index tree */
#define DICT_HDR_FSEG_HEADER 56 /* Segment header for the tablespace
segment into which the dictionary
header is created */
/*-------------------------------------------------------------*/
/* The field number of the page number field in the sys_indexes table
clustered index */
#define DICT_SYS_INDEXES_PAGE_NO_FIELD 8
#define DICT_SYS_INDEXES_SPACE_NO_FIELD 7
#define DICT_SYS_INDEXES_TYPE_FIELD 6
/* When a row id which is zero modulo this number (which must be a power of
two) is assigned, the field DICT_HDR_ROW_ID on the dictionary header page is
updated */
#define DICT_HDR_ROW_ID_WRITE_MARGIN 256
#ifndef UNIV_NONINL
#include "dict0boot.ic"
#endif
#endif
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