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403 lines
13 KiB
C++
403 lines
13 KiB
C++
/*****************************************************************************
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Copyright (c) 1996, 2017, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2016, 2023, MariaDB Corporation.
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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, Fifth Floor, 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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#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 "buf0flu.h"
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#include "log0recv.h"
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#include "os0file.h"
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/** The DICT_HDR page identifier */
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static constexpr page_id_t hdr_page_id{DICT_HDR_SPACE, DICT_HDR_PAGE_NO};
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/** @return the DICT_HDR block, x-latched */
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static buf_block_t *dict_hdr_get(mtr_t *mtr)
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{
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/* We assume that the DICT_HDR page is always readable and available. */
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buf_block_t *b=
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buf_page_get_gen(hdr_page_id, 0, RW_X_LATCH, nullptr, BUF_GET, mtr);
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buf_page_make_young_if_needed(&b->page);
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return b;
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}
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/**********************************************************************//**
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Returns a new table, index, or space id. */
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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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uint32_t* space_id) /*!< out: space id
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(not assigned if NULL) */
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{
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ib_id_t id;
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mtr_t mtr;
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mtr.start();
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buf_block_t* 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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+ dict_hdr->page.frame);
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id++;
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mtr.write<8>(*dict_hdr, DICT_HDR + DICT_HDR_TABLE_ID
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+ dict_hdr->page.frame, id);
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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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+ dict_hdr->page.frame);
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id++;
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mtr.write<8>(*dict_hdr, DICT_HDR + DICT_HDR_INDEX_ID
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+ dict_hdr->page.frame, id);
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*index_id = id;
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}
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if (space_id) {
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*space_id = mach_read_from_4(DICT_HDR + DICT_HDR_MAX_SPACE_ID
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+ dict_hdr->page.frame);
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if (fil_assign_new_space_id(space_id)) {
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mtr.write<4>(*dict_hdr,
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DICT_HDR + DICT_HDR_MAX_SPACE_ID
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+ dict_hdr->page.frame, *space_id);
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}
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}
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mtr.commit();
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}
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/** Create the DICT_HDR page on database initialization.
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@return error code */
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dberr_t dict_create()
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{
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ulint root_page_no;
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dberr_t err;
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mtr_t mtr;
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mtr.start();
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compile_time_assert(DICT_HDR_SPACE == 0);
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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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buf_block_t* d = fseg_create(fil_system.sys_space,
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DICT_HDR + DICT_HDR_FSEG_HEADER, &mtr,
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&err);
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if (!d) {
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goto func_exit;
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}
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ut_a(d->page.id() == hdr_page_id);
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/* Start counting table, index, and tree ids from
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DICT_HDR_FIRST_ID */
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mtr.write<8>(*d, DICT_HDR + DICT_HDR_TABLE_ID + d->page.frame,
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DICT_HDR_FIRST_ID);
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mtr.write<8>(*d, DICT_HDR + DICT_HDR_INDEX_ID + d->page.frame,
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DICT_HDR_FIRST_ID);
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ut_ad(!mach_read_from_4(DICT_HDR + DICT_HDR_MAX_SPACE_ID
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+ d->page.frame));
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/* Obsolete, but we must initialize it anyway. */
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mtr.write<4>(*d, DICT_HDR + DICT_HDR_MIX_ID_LOW + d->page.frame,
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DICT_HDR_FIRST_ID);
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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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fil_system.sys_space, DICT_TABLES_ID,
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nullptr, &mtr, &err);
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if (root_page_no == FIL_NULL) {
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goto func_exit;
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}
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mtr.write<4>(*d, DICT_HDR + DICT_HDR_TABLES + d->page.frame,
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root_page_no);
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/*--------------------------*/
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root_page_no = btr_create(DICT_UNIQUE,
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fil_system.sys_space, DICT_TABLE_IDS_ID,
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nullptr, &mtr, &err);
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if (root_page_no == FIL_NULL) {
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goto func_exit;
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}
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mtr.write<4>(*d, DICT_HDR + DICT_HDR_TABLE_IDS + d->page.frame,
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root_page_no);
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/*--------------------------*/
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root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
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fil_system.sys_space, DICT_COLUMNS_ID,
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nullptr, &mtr, &err);
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if (root_page_no == FIL_NULL) {
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goto func_exit;
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}
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mtr.write<4>(*d, DICT_HDR + DICT_HDR_COLUMNS + d->page.frame,
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root_page_no);
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/*--------------------------*/
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root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
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fil_system.sys_space, DICT_INDEXES_ID,
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nullptr, &mtr, &err);
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if (root_page_no == FIL_NULL) {
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goto func_exit;
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}
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mtr.write<4>(*d, DICT_HDR + DICT_HDR_INDEXES + d->page.frame,
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root_page_no);
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/*--------------------------*/
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root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
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fil_system.sys_space, DICT_FIELDS_ID,
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nullptr, &mtr, &err);
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if (root_page_no == FIL_NULL) {
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goto func_exit;
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}
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mtr.write<4>(*d, DICT_HDR + DICT_HDR_FIELDS + d->page.frame,
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root_page_no);
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func_exit:
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mtr.commit();
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return err ? err : dict_boot();
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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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dberr_t dict_boot()
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{
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dict_table_t* table;
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dict_index_t* index;
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mem_heap_t* heap;
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mtr_t mtr;
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static_assert(DICT_NUM_COLS__SYS_TABLES == 8, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_TABLES == 10, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_TABLE_IDS == 2, "compatibility");
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static_assert(DICT_NUM_COLS__SYS_COLUMNS == 7, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_COLUMNS == 9, "compatibility");
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static_assert(DICT_NUM_COLS__SYS_INDEXES == 8, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_INDEXES == 10, "compatibility");
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static_assert(DICT_NUM_COLS__SYS_FIELDS == 3, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_FIELDS == 5, "compatibility");
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static_assert(DICT_NUM_COLS__SYS_FOREIGN == 4, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_FOREIGN == 6, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_FOREIGN_FOR_NAME == 2,
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"compatibility");
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static_assert(DICT_NUM_COLS__SYS_FOREIGN_COLS == 4, "compatibility");
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static_assert(DICT_NUM_FIELDS__SYS_FOREIGN_COLS == 6, "compatibility");
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mtr.start();
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/* Create the hash tables etc. */
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dict_sys.create();
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dberr_t err;
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const buf_block_t *d = recv_sys.recover(hdr_page_id, &mtr ,&err);
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DBUG_EXECUTE_IF("hdr_page_corrupt",
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err= DB_CORRUPTION;
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d= nullptr;);
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if (!d) {
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mtr.commit();
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return err;
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}
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heap = mem_heap_create(450);
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dict_sys.lock(SRW_LOCK_CALL);
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const byte* dict_hdr = &d->page.frame[DICT_HDR];
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if (uint32_t max_space_id
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= mach_read_from_4(dict_hdr + DICT_HDR_MAX_SPACE_ID)) {
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max_space_id--;
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fil_assign_new_space_id(&max_space_id);
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}
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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_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_TABLES],
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fil_system.sys_space,
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DICT_NUM_COLS__SYS_TABLES, 0, 0, 0);
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dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0,
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MAX_FULL_NAME_LEN);
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dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 8);
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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 ROW_FORMAT
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is not REDUNDANT or COMPACT, 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. */
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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_system_columns(table, heap);
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table->add_to_cache();
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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(table, "CLUST_IND",
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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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err = dict_index_add_to_cache(
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index, mach_read_from_4(dict_hdr + DICT_HDR_TABLES));
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ut_a(err == DB_SUCCESS);
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ut_ad(!table->is_instant());
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table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
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UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));
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/*-------------------------*/
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index = dict_mem_index_create(table, "ID_IND", 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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err = dict_index_add_to_cache(
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index, mach_read_from_4(dict_hdr + DICT_HDR_TABLE_IDS));
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ut_a(err == DB_SUCCESS);
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/*-------------------------*/
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table = dict_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_COLUMNS],
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fil_system.sys_space,
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DICT_NUM_COLS__SYS_COLUMNS, 0, 0, 0);
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dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 8);
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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_system_columns(table, heap);
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table->add_to_cache();
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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(table, "CLUST_IND",
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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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err = dict_index_add_to_cache(
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index, mach_read_from_4(dict_hdr + DICT_HDR_COLUMNS));
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ut_a(err == DB_SUCCESS);
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ut_ad(!table->is_instant());
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table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
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UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));
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/*-------------------------*/
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table = dict_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_INDEXES],
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fil_system.sys_space,
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DICT_NUM_COLS__SYS_INDEXES, 0, 0, 0);
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dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 8);
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dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 8);
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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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/* SYS_INDEXES.SPACE is only read by in dict_drop_index_tree() */
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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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dict_mem_table_add_col(table, heap, "MERGE_THRESHOLD", DATA_INT, 0, 4);
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table->id = DICT_INDEXES_ID;
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dict_table_add_system_columns(table, heap);
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/* The column SYS_INDEXES.MERGE_THRESHOLD was "instantly"
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added in MySQL 5.7 and MariaDB 10.2.2. Assign it DEFAULT NULL.
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Because of file format compatibility, we must treat SYS_INDEXES
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as a special case, relaxing some debug assertions
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for DICT_INDEXES_ID. */
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dict_table_get_nth_col(table, DICT_COL__SYS_INDEXES__MERGE_THRESHOLD)
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->def_val.len = UNIV_SQL_NULL;
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table->add_to_cache();
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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(table, "CLUST_IND",
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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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err = dict_index_add_to_cache(
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index, mach_read_from_4(dict_hdr + DICT_HDR_INDEXES));
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ut_a(err == DB_SUCCESS);
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ut_ad(!table->is_instant());
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table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
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UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));
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/*-------------------------*/
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table = dict_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_FIELDS],
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fil_system.sys_space,
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DICT_NUM_COLS__SYS_FIELDS, 0, 0, 0);
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dict_mem_table_add_col(table, heap, "INDEX_ID", DATA_BINARY, 0, 8);
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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_system_columns(table, heap);
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table->add_to_cache();
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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(table, "CLUST_IND",
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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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err = dict_index_add_to_cache(
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index, mach_read_from_4(dict_hdr + DICT_HDR_FIELDS));
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ut_a(err == DB_SUCCESS);
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ut_ad(!table->is_instant());
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table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
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UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));
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mtr.commit();
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dict_sys.unlock();
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return err;
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}
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