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515 lines
14 KiB
C++
515 lines
14 KiB
C++
/*****************************************************************************
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Copyright (c) 1996, 2017, Oracle and/or its affiliates. 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 Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file dict/dict0boot.cc
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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 "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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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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dict_hdr_t* dict_hdr;
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ib_id_t 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 = mach_read_from_8(dict_hdr + DICT_HDR_TABLE_ID);
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id++;
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mlog_write_ull(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 = mach_read_from_8(dict_hdr + DICT_HDR_INDEX_ID);
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id++;
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mlog_write_ull(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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row_id_t 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_ull(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_ull(dict_header + DICT_HDR_ROW_ID,
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DICT_HDR_FIRST_ID, mtr);
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mlog_write_ull(dict_header + DICT_HDR_TABLE_ID,
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DICT_HDR_FIRST_ID, mtr);
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mlog_write_ull(dict_header + DICT_HDR_INDEX_ID,
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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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@return DB_SUCCESS or error code. */
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UNIV_INTERN
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dberr_t
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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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dberr_t error;
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/* Be sure these constants do not ever change. To avoid bloat,
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only check the *NUM_FIELDS* in each table */
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ut_ad(DICT_NUM_COLS__SYS_TABLES == 8);
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ut_ad(DICT_NUM_FIELDS__SYS_TABLES == 10);
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ut_ad(DICT_NUM_FIELDS__SYS_TABLE_IDS == 2);
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ut_ad(DICT_NUM_COLS__SYS_COLUMNS == 7);
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ut_ad(DICT_NUM_FIELDS__SYS_COLUMNS == 9);
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ut_ad(DICT_NUM_COLS__SYS_INDEXES == 7);
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ut_ad(DICT_NUM_FIELDS__SYS_INDEXES == 9);
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ut_ad(DICT_NUM_COLS__SYS_FIELDS == 3);
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ut_ad(DICT_NUM_FIELDS__SYS_FIELDS == 5);
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ut_ad(DICT_NUM_COLS__SYS_FOREIGN == 4);
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ut_ad(DICT_NUM_FIELDS__SYS_FOREIGN == 6);
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ut_ad(DICT_NUM_FIELDS__SYS_FOREIGN_FOR_NAME == 2);
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ut_ad(DICT_NUM_COLS__SYS_FOREIGN_COLS == 4);
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ut_ad(DICT_NUM_FIELDS__SYS_FOREIGN_COLS == 6);
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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 = DICT_HDR_ROW_ID_WRITE_MARGIN
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+ ut_uint64_align_up(mach_read_from_8(dict_hdr + DICT_HDR_ROW_ID),
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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, 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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/* The low order bit of TYPE is always set to 1. If the format
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is UNIV_FORMAT_B or higher, this field matches 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, FALSE, 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, 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, FALSE, 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, 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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table->id = DICT_INDEXES_ID;
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dict_table_add_to_cache(table, FALSE, 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, 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, FALSE, 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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dberr_t err = DB_SUCCESS;
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/** If innodb_force_recovery is set to 6 then allow
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the server to start even though ibuf is not empty. */
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if (srv_force_recovery != SRV_FORCE_NO_LOG_REDO
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&& srv_read_only_mode && !ibuf_is_empty()) {
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|
|
ib_logf(IB_LOG_LEVEL_ERROR,
|
|
"Change buffer must be empty when --innodb-read-only "
|
|
"is set!");
|
|
|
|
err = DB_ERROR;
|
|
} else {
|
|
/* Load definitions of other indexes on system tables */
|
|
|
|
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));
|
|
|
|
return(err);
|
|
}
|
|
|
|
/*****************************************************************//**
|
|
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 server bootstrap.
|
|
@return DB_SUCCESS or error code. */
|
|
UNIV_INTERN
|
|
dberr_t
|
|
dict_create(void)
|
|
/*=============*/
|
|
{
|
|
mtr_t mtr;
|
|
|
|
mtr_start(&mtr);
|
|
|
|
dict_hdr_create(&mtr);
|
|
|
|
mtr_commit(&mtr);
|
|
|
|
dberr_t err = dict_boot();
|
|
|
|
if (err == DB_SUCCESS) {
|
|
dict_insert_initial_data();
|
|
}
|
|
|
|
return(err);
|
|
}
|