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187 lines
6.4 KiB
C
187 lines
6.4 KiB
C
/*****************************************************************************
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Copyright (c) 1996, 2010, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/dict0boot.h
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Data dictionary creation and booting
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Created 4/18/1996 Heikki Tuuri
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*******************************************************/
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#ifndef dict0boot_h
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#define dict0boot_h
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#include "univ.i"
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#include "mtr0mtr.h"
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#include "mtr0log.h"
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#include "ut0byte.h"
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#include "buf0buf.h"
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#include "fsp0fsp.h"
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#include "dict0dict.h"
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typedef byte dict_hdr_t;
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/**********************************************************************//**
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Gets a pointer to the dictionary header and x-latches its page.
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@return pointer to the dictionary header, page x-latched */
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UNIV_INTERN
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dict_hdr_t*
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dict_hdr_get(
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/*=========*/
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mtr_t* mtr); /*!< in: mtr */
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/**********************************************************************//**
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Returns a new table, index, or space id. */
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UNIV_INTERN
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void
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dict_hdr_get_new_id(
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/*================*/
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table_id_t* table_id, /*!< out: table id
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(not assigned if NULL) */
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index_id_t* index_id, /*!< out: index id
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(not assigned if NULL) */
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ulint* space_id); /*!< out: space id
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(not assigned if NULL) */
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/**********************************************************************//**
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Returns a new row id.
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@return the new id */
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UNIV_INLINE
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row_id_t
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dict_sys_get_new_row_id(void);
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/*=========================*/
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/**********************************************************************//**
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Reads a row id from a record or other 6-byte stored form.
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@return row id */
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UNIV_INLINE
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row_id_t
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dict_sys_read_row_id(
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/*=================*/
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const byte* field); /*!< in: record field */
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/**********************************************************************//**
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Writes a row id to a record or other 6-byte stored form. */
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UNIV_INLINE
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void
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dict_sys_write_row_id(
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/*==================*/
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byte* field, /*!< in: record field */
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row_id_t row_id);/*!< in: row id */
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/*****************************************************************//**
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Initializes the data dictionary memory structures when the database is
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started. This function is also called when the data dictionary is created. */
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UNIV_INTERN
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void
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dict_boot(void);
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/*===========*/
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/*****************************************************************//**
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Creates and initializes the data dictionary at the database creation. */
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UNIV_INTERN
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void
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dict_create(void);
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/*=============*/
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/*****************************************************************//**
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Verifies the SYS_STATS table by scanning its clustered index. This
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function may only be called at InnoDB startup time.
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@return TRUE if SYS_STATS was verified successfully */
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UNIV_INTERN
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ibool
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dict_verify_xtradb_sys_stats(void);
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/*==============================*/
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/*****************************************************************//**
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Discard the existing dictionary cache SYS_STATS information, create and
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add it there anew. Does not touch the old SYS_STATS tablespace page
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under the assumption that they are corrupted or overwritten for other
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purposes. */
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UNIV_INTERN
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void
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dict_recreate_xtradb_sys_stats(void);
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/*================================*/
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/* Space id and page no where the dictionary header resides */
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#define DICT_HDR_SPACE 0 /* the SYSTEM tablespace */
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#define DICT_HDR_PAGE_NO FSP_DICT_HDR_PAGE_NO
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/* The ids for the basic system tables and their indexes */
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#define DICT_TABLES_ID 1
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#define DICT_COLUMNS_ID 2
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#define DICT_INDEXES_ID 3
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#define DICT_FIELDS_ID 4
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#define DICT_STATS_ID 6
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/* The following is a secondary index on SYS_TABLES */
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#define DICT_TABLE_IDS_ID 5
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#define DICT_HDR_FIRST_ID 10 /* the ids for tables etc. start
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from this number, except for basic
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system tables and their above defined
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indexes; ibuf tables and indexes are
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assigned as the id the number
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DICT_IBUF_ID_MIN plus the space id */
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#define DICT_IBUF_ID_MIN 0xFFFFFFFF00000000ULL
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/* The offset of the dictionary header on the page */
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#define DICT_HDR FSEG_PAGE_DATA
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/*-------------------------------------------------------------*/
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/* Dictionary header offsets */
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#define DICT_HDR_ROW_ID 0 /* The latest assigned row id */
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#define DICT_HDR_TABLE_ID 8 /* The latest assigned table id */
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#define DICT_HDR_INDEX_ID 16 /* The latest assigned index id */
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#define DICT_HDR_MAX_SPACE_ID 24 /* The latest assigned space id, or 0*/
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#define DICT_HDR_MIX_ID_LOW 28 /* Obsolete,always DICT_HDR_FIRST_ID */
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#define DICT_HDR_TABLES 32 /* Root of the table index tree */
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#define DICT_HDR_TABLE_IDS 36 /* Root of the table index tree */
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#define DICT_HDR_COLUMNS 40 /* Root of the column index tree */
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#define DICT_HDR_INDEXES 44 /* Root of the index index tree */
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#define DICT_HDR_FIELDS 48 /* Root of the index field
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index tree */
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#define DICT_HDR_STATS 52 /* Root of the stats tree */
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#define DICT_HDR_FSEG_HEADER 56 /* Segment header for the tablespace
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segment into which the dictionary
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header is created */
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#define DICT_HDR_XTRADB_MARK 256 /* Flag to distinguish expansion of XtraDB */
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/*-------------------------------------------------------------*/
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/* The field numbers in the SYS_TABLES clustered index */
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#define DICT_SYS_TABLES_TYPE_FIELD 5
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/* The field numbers in the SYS_INDEXES clustered index */
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#define DICT_SYS_INDEXES_PAGE_NO_FIELD 8
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#define DICT_SYS_INDEXES_SPACE_NO_FIELD 7
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#define DICT_SYS_INDEXES_TYPE_FIELD 6
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#define DICT_SYS_INDEXES_NAME_FIELD 4
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#define DICT_SYS_STATS_DIFF_VALS_FIELD 4
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#define DICT_SYS_STATS_NON_NULL_VALS_FIELD 5
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/* When a row id which is zero modulo this number (which must be a power of
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two) is assigned, the field DICT_HDR_ROW_ID on the dictionary header page is
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updated */
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#define DICT_HDR_ROW_ID_WRITE_MARGIN 256
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#define DICT_HDR_XTRADB_FLAG 0x5854524144425F31ULL /* "XTRADB_1" */
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#ifndef UNIV_NONINL
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#include "dict0boot.ic"
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#endif
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#endif
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