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b7a2474416
Store the max_space_id in the data dictionary header in order to avoid space_id reuse. DICT_HDR_MIX_ID: Renamed to DICT_HDR_MAX_SPACE_ID, DICT_HDR_MIX_ID_LOW. dict_hdr_get_new_id(): Return table_id, index_id, space_id or a subset of them. fil_system_t: Add ibool space_id_reuse_warned. fil_create_new_single_table_tablespace(): Get the space_id from the caller. fil_space_create(): Issue a warning if the fil_system->max_assigned_id is exceeded. fil_assign_new_space_id(): Return TRUE/FALSE and take a pointer to the space_id as a parameter. Make the function public. fil_init(): Initialize all fil_system fields by mem_zalloc(). Remove explicit initializations of certain fields to 0 or NULL.
486 lines
14 KiB
C
486 lines
14 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., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/**************************************************//**
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@file dict/dict0boot.c
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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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#include "dict0boot.h"
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#ifdef UNIV_NONINL
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#include "dict0boot.ic"
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#endif
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#include "dict0crea.h"
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#include "btr0btr.h"
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#include "dict0load.h"
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#include "dict0load.h"
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#include "trx0trx.h"
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#include "srv0srv.h"
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#include "ibuf0ibuf.h"
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#include "buf0flu.h"
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#include "log0recv.h"
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#include "os0file.h"
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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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buf_block_t* block;
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dict_hdr_t* header;
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block = buf_page_get(DICT_HDR_SPACE, 0, DICT_HDR_PAGE_NO,
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RW_X_LATCH, mtr);
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header = DICT_HDR + buf_block_get_frame(block);
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buf_block_dbg_add_level(block, SYNC_DICT_HEADER);
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return(header);
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}
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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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dulint* table_id, /*!< out: table id (not assigned if NULL) */
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dulint* index_id, /*!< out: index id (not assigned if NULL) */
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ulint* space_id) /*!< out: space id (not assigned if NULL) */
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{
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dict_hdr_t* dict_hdr;
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dulint id;
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mtr_t mtr;
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mtr_start(&mtr);
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dict_hdr = dict_hdr_get(&mtr);
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if (table_id) {
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id = mtr_read_dulint(dict_hdr + DICT_HDR_TABLE_ID, &mtr);
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id = ut_dulint_add(id, 1);
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mlog_write_dulint(dict_hdr + DICT_HDR_TABLE_ID, id, &mtr);
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*table_id = id;
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}
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if (index_id) {
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id = mtr_read_dulint(dict_hdr + DICT_HDR_INDEX_ID, &mtr);
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id = ut_dulint_add(id, 1);
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mlog_write_dulint(dict_hdr + DICT_HDR_INDEX_ID, id, &mtr);
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*index_id = id;
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}
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if (space_id) {
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*space_id = mtr_read_ulint(dict_hdr + DICT_HDR_MAX_SPACE_ID,
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MLOG_4BYTES, &mtr);
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if (fil_assign_new_space_id(space_id)) {
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mlog_write_ulint(dict_hdr + DICT_HDR_MAX_SPACE_ID,
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*space_id, MLOG_4BYTES, &mtr);
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}
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}
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mtr_commit(&mtr);
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}
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/**********************************************************************//**
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Writes the current value of the row id counter to the dictionary header file
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page. */
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UNIV_INTERN
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void
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dict_hdr_flush_row_id(void)
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/*=======================*/
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{
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dict_hdr_t* dict_hdr;
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dulint id;
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mtr_t mtr;
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ut_ad(mutex_own(&(dict_sys->mutex)));
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id = dict_sys->row_id;
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mtr_start(&mtr);
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dict_hdr = dict_hdr_get(&mtr);
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mlog_write_dulint(dict_hdr + DICT_HDR_ROW_ID, id, &mtr);
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mtr_commit(&mtr);
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}
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/*****************************************************************//**
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Creates the file page for the dictionary header. This function is
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called only at the database creation.
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@return TRUE if succeed */
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static
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ibool
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dict_hdr_create(
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/*============*/
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mtr_t* mtr) /*!< in: mtr */
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{
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buf_block_t* block;
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dict_hdr_t* dict_header;
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ulint root_page_no;
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ut_ad(mtr);
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/* Create the dictionary header file block in a new, allocated file
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segment in the system tablespace */
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block = fseg_create(DICT_HDR_SPACE, 0,
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DICT_HDR + DICT_HDR_FSEG_HEADER, mtr);
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ut_a(DICT_HDR_PAGE_NO == buf_block_get_page_no(block));
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dict_header = dict_hdr_get(mtr);
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/* Start counting row, table, index, and tree ids from
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DICT_HDR_FIRST_ID */
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mlog_write_dulint(dict_header + DICT_HDR_ROW_ID,
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ut_dulint_create(0, DICT_HDR_FIRST_ID), mtr);
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mlog_write_dulint(dict_header + DICT_HDR_TABLE_ID,
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ut_dulint_create(0, DICT_HDR_FIRST_ID), mtr);
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mlog_write_dulint(dict_header + DICT_HDR_INDEX_ID,
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ut_dulint_create(0, DICT_HDR_FIRST_ID), mtr);
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mlog_write_ulint(dict_header + DICT_HDR_MAX_SPACE_ID,
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0, MLOG_4BYTES, mtr);
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/* Obsolete, but we must initialize it anyway. */
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mlog_write_ulint(dict_header + DICT_HDR_MIX_ID_LOW,
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DICT_HDR_FIRST_ID, MLOG_4BYTES, mtr);
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/* Create the B-tree roots for the clustered indexes of the basic
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system tables */
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/*--------------------------*/
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root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
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DICT_HDR_SPACE, 0, DICT_TABLES_ID,
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dict_ind_redundant, mtr);
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if (root_page_no == FIL_NULL) {
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return(FALSE);
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}
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mlog_write_ulint(dict_header + DICT_HDR_TABLES, root_page_no,
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MLOG_4BYTES, mtr);
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/*--------------------------*/
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root_page_no = btr_create(DICT_UNIQUE, DICT_HDR_SPACE, 0,
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DICT_TABLE_IDS_ID,
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dict_ind_redundant, mtr);
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if (root_page_no == FIL_NULL) {
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return(FALSE);
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}
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mlog_write_ulint(dict_header + DICT_HDR_TABLE_IDS, root_page_no,
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MLOG_4BYTES, mtr);
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/*--------------------------*/
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root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
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DICT_HDR_SPACE, 0, DICT_COLUMNS_ID,
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dict_ind_redundant, mtr);
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if (root_page_no == FIL_NULL) {
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return(FALSE);
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}
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mlog_write_ulint(dict_header + DICT_HDR_COLUMNS, root_page_no,
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MLOG_4BYTES, mtr);
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/*--------------------------*/
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root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
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DICT_HDR_SPACE, 0, DICT_INDEXES_ID,
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dict_ind_redundant, mtr);
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if (root_page_no == FIL_NULL) {
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return(FALSE);
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}
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mlog_write_ulint(dict_header + DICT_HDR_INDEXES, root_page_no,
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MLOG_4BYTES, mtr);
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/*--------------------------*/
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root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
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DICT_HDR_SPACE, 0, DICT_FIELDS_ID,
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dict_ind_redundant, mtr);
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if (root_page_no == FIL_NULL) {
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return(FALSE);
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}
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mlog_write_ulint(dict_header + DICT_HDR_FIELDS, root_page_no,
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MLOG_4BYTES, mtr);
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/*--------------------------*/
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return(TRUE);
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}
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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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dict_table_t* table;
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dict_index_t* index;
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dict_hdr_t* dict_hdr;
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mem_heap_t* heap;
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mtr_t mtr;
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ulint error;
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mtr_start(&mtr);
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/* Create the hash tables etc. */
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dict_init();
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heap = mem_heap_create(450);
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mutex_enter(&(dict_sys->mutex));
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/* Get the dictionary header */
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dict_hdr = dict_hdr_get(&mtr);
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/* Because we only write new row ids to disk-based data structure
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(dictionary header) when it is divisible by
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DICT_HDR_ROW_ID_WRITE_MARGIN, in recovery we will not recover
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the latest value of the row id counter. Therefore we advance
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the counter at the database startup to avoid overlapping values.
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Note that when a user after database startup first time asks for
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a new row id, then because the counter is now divisible by
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..._MARGIN, it will immediately be updated to the disk-based
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header. */
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dict_sys->row_id = ut_dulint_add(
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ut_dulint_align_up(mtr_read_dulint(dict_hdr + DICT_HDR_ROW_ID,
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&mtr),
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DICT_HDR_ROW_ID_WRITE_MARGIN),
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DICT_HDR_ROW_ID_WRITE_MARGIN);
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/* Insert into the dictionary cache the descriptions of the basic
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system tables */
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/*-------------------------*/
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table = dict_mem_table_create("SYS_TABLES", DICT_HDR_SPACE, 8, 0);
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dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 0);
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/* ROW_FORMAT = (N_COLS >> 31) ? COMPACT : REDUNDANT */
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dict_mem_table_add_col(table, heap, "N_COLS", DATA_INT, 0, 4);
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/* TYPE is either DICT_TABLE_ORDINARY, or (TYPE & DICT_TF_COMPACT)
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and (TYPE & DICT_TF_FORMAT_MASK) are nonzero and TYPE = table->flags */
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dict_mem_table_add_col(table, heap, "TYPE", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "MIX_ID", DATA_BINARY, 0, 0);
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/* MIX_LEN may contain additional table flags when
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ROW_FORMAT!=REDUNDANT. Currently, these flags include
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DICT_TF2_TEMPORARY. */
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dict_mem_table_add_col(table, heap, "MIX_LEN", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "CLUSTER_NAME", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "SPACE", DATA_INT, 0, 4);
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table->id = DICT_TABLES_ID;
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dict_table_add_to_cache(table, heap);
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dict_sys->sys_tables = table;
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mem_heap_empty(heap);
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index = dict_mem_index_create("SYS_TABLES", "CLUST_IND",
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DICT_HDR_SPACE,
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DICT_UNIQUE | DICT_CLUSTERED, 1);
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dict_mem_index_add_field(index, "NAME", 0);
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index->id = DICT_TABLES_ID;
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error = dict_index_add_to_cache(table, index,
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mtr_read_ulint(dict_hdr
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+ DICT_HDR_TABLES,
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MLOG_4BYTES, &mtr),
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FALSE);
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ut_a(error == DB_SUCCESS);
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/*-------------------------*/
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index = dict_mem_index_create("SYS_TABLES", "ID_IND",
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DICT_HDR_SPACE, DICT_UNIQUE, 1);
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dict_mem_index_add_field(index, "ID", 0);
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index->id = DICT_TABLE_IDS_ID;
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error = dict_index_add_to_cache(table, index,
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mtr_read_ulint(dict_hdr
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+ DICT_HDR_TABLE_IDS,
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MLOG_4BYTES, &mtr),
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FALSE);
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ut_a(error == DB_SUCCESS);
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/*-------------------------*/
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table = dict_mem_table_create("SYS_COLUMNS", DICT_HDR_SPACE, 7, 0);
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dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "POS", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "MTYPE", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "PRTYPE", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "LEN", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "PREC", DATA_INT, 0, 4);
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table->id = DICT_COLUMNS_ID;
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dict_table_add_to_cache(table, heap);
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dict_sys->sys_columns = table;
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mem_heap_empty(heap);
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index = dict_mem_index_create("SYS_COLUMNS", "CLUST_IND",
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DICT_HDR_SPACE,
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DICT_UNIQUE | DICT_CLUSTERED, 2);
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dict_mem_index_add_field(index, "TABLE_ID", 0);
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dict_mem_index_add_field(index, "POS", 0);
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index->id = DICT_COLUMNS_ID;
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error = dict_index_add_to_cache(table, index,
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mtr_read_ulint(dict_hdr
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+ DICT_HDR_COLUMNS,
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MLOG_4BYTES, &mtr),
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FALSE);
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ut_a(error == DB_SUCCESS);
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/*-------------------------*/
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table = dict_mem_table_create("SYS_INDEXES", DICT_HDR_SPACE, 7, 0);
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dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "N_FIELDS", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "TYPE", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "SPACE", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "PAGE_NO", DATA_INT, 0, 4);
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/* The '+ 2' below comes from the fields DB_TRX_ID, DB_ROLL_PTR */
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#if DICT_SYS_INDEXES_PAGE_NO_FIELD != 6 + 2
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#error "DICT_SYS_INDEXES_PAGE_NO_FIELD != 6 + 2"
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#endif
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#if DICT_SYS_INDEXES_SPACE_NO_FIELD != 5 + 2
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#error "DICT_SYS_INDEXES_SPACE_NO_FIELD != 5 + 2"
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#endif
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#if DICT_SYS_INDEXES_TYPE_FIELD != 4 + 2
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#error "DICT_SYS_INDEXES_TYPE_FIELD != 4 + 2"
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#endif
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#if DICT_SYS_INDEXES_NAME_FIELD != 2 + 2
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#error "DICT_SYS_INDEXES_NAME_FIELD != 2 + 2"
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#endif
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table->id = DICT_INDEXES_ID;
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dict_table_add_to_cache(table, heap);
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dict_sys->sys_indexes = table;
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mem_heap_empty(heap);
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index = dict_mem_index_create("SYS_INDEXES", "CLUST_IND",
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DICT_HDR_SPACE,
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DICT_UNIQUE | DICT_CLUSTERED, 2);
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dict_mem_index_add_field(index, "TABLE_ID", 0);
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dict_mem_index_add_field(index, "ID", 0);
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index->id = DICT_INDEXES_ID;
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error = dict_index_add_to_cache(table, index,
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mtr_read_ulint(dict_hdr
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+ DICT_HDR_INDEXES,
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MLOG_4BYTES, &mtr),
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FALSE);
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ut_a(error == DB_SUCCESS);
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/*-------------------------*/
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table = dict_mem_table_create("SYS_FIELDS", DICT_HDR_SPACE, 3, 0);
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dict_mem_table_add_col(table, heap, "INDEX_ID", DATA_BINARY, 0, 0);
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dict_mem_table_add_col(table, heap, "POS", DATA_INT, 0, 4);
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dict_mem_table_add_col(table, heap, "COL_NAME", DATA_BINARY, 0, 0);
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table->id = DICT_FIELDS_ID;
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dict_table_add_to_cache(table, heap);
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dict_sys->sys_fields = table;
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mem_heap_free(heap);
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index = dict_mem_index_create("SYS_FIELDS", "CLUST_IND",
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DICT_HDR_SPACE,
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DICT_UNIQUE | DICT_CLUSTERED, 2);
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dict_mem_index_add_field(index, "INDEX_ID", 0);
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dict_mem_index_add_field(index, "POS", 0);
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index->id = DICT_FIELDS_ID;
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error = dict_index_add_to_cache(table, index,
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mtr_read_ulint(dict_hdr
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+ DICT_HDR_FIELDS,
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MLOG_4BYTES, &mtr),
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FALSE);
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ut_a(error == DB_SUCCESS);
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mtr_commit(&mtr);
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/*-------------------------*/
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/* Initialize the insert buffer table and index for each tablespace */
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ibuf_init_at_db_start();
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/* Load definitions of other indexes on system tables */
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dict_load_sys_table(dict_sys->sys_tables);
|
|
dict_load_sys_table(dict_sys->sys_columns);
|
|
dict_load_sys_table(dict_sys->sys_indexes);
|
|
dict_load_sys_table(dict_sys->sys_fields);
|
|
|
|
mutex_exit(&(dict_sys->mutex));
|
|
}
|
|
|
|
/*****************************************************************//**
|
|
Inserts the basic system table data into themselves in the database
|
|
creation. */
|
|
static
|
|
void
|
|
dict_insert_initial_data(void)
|
|
/*==========================*/
|
|
{
|
|
/* Does nothing yet */
|
|
}
|
|
|
|
/*****************************************************************//**
|
|
Creates and initializes the data dictionary at the database creation. */
|
|
UNIV_INTERN
|
|
void
|
|
dict_create(void)
|
|
/*=============*/
|
|
{
|
|
mtr_t mtr;
|
|
|
|
mtr_start(&mtr);
|
|
|
|
dict_hdr_create(&mtr);
|
|
|
|
mtr_commit(&mtr);
|
|
|
|
dict_boot();
|
|
|
|
dict_insert_initial_data();
|
|
}
|