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297 lines
10 KiB
C
297 lines
10 KiB
C
/*****************************************************************************
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Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2018, 2022, 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 include/dict0boot.h
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Data dictionary creation and booting
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Created 4/18/1996 Heikki Tuuri
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*******************************************************/
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#ifndef dict0boot_h
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#define dict0boot_h
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#include "mtr0mtr.h"
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#include "mtr0log.h"
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#include "ut0byte.h"
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#include "buf0buf.h"
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#include "dict0dict.h"
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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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/** Update dict_sys.row_id in the dictionary header file page. */
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void dict_hdr_flush_row_id(row_id_t id);
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/** @return A new value for GEN_CLUST_INDEX(DB_ROW_ID) */
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inline row_id_t dict_sys_t::get_new_row_id()
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{
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row_id_t id= row_id.fetch_add(1);
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if (!(id % ROW_ID_WRITE_MARGIN))
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dict_hdr_flush_row_id(id);
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return id;
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}
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/** Ensure that row_id is not smaller than id, on IMPORT TABLESPACE */
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inline void dict_sys_t::update_row_id(row_id_t id)
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{
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row_id_t sys_id= row_id;
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while (id >= sys_id)
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{
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if (!row_id.compare_exchange_strong(sys_id, id))
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continue;
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if (!(id % ROW_ID_WRITE_MARGIN))
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dict_hdr_flush_row_id(id);
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break;
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}
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}
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/**********************************************************************//**
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Writes a row id to a record or other 6-byte stored form. */
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inline void dict_sys_write_row_id(byte *field, row_id_t row_id)
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{
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static_assert(DATA_ROW_ID_LEN == 6, "compatibility");
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mach_write_to_6(field, row_id);
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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
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dict_boot(void)
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/*===========*/
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MY_ATTRIBUTE((warn_unused_result));
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/*****************************************************************//**
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Creates and initializes the data dictionary at the server bootstrap.
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@return DB_SUCCESS or error code. */
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dberr_t
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dict_create(void)
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/*=============*/
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MY_ATTRIBUTE((warn_unused_result));
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/*********************************************************************//**
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Check if a table id belongs to system table.
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@return true if the table id belongs to a system table. */
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inline bool dict_is_sys_table(table_id_t id) { return id < DICT_HDR_FIRST_ID; }
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/* Space id and page no where the dictionary header resides */
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#define DICT_HDR_SPACE 0 /* the SYSTEM tablespace */
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#define DICT_HDR_PAGE_NO FSP_DICT_HDR_PAGE_NO
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/* The ids for the basic system tables and their indexes */
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#define DICT_TABLES_ID 1
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#define DICT_COLUMNS_ID 2
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#define DICT_INDEXES_ID dict_index_t::DICT_INDEXES_ID /* 3 */
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#define DICT_FIELDS_ID 4
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/* The following is a secondary index on SYS_TABLES */
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#define DICT_TABLE_IDS_ID 5
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/* The offset of the dictionary header on the page */
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#define DICT_HDR FSEG_PAGE_DATA
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/*-------------------------------------------------------------*/
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/* Dictionary header offsets */
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#define DICT_HDR_ROW_ID 0 /* The latest assigned row id */
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#define DICT_HDR_TABLE_ID 8 /* The latest assigned table id */
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#define DICT_HDR_INDEX_ID 16 /* The latest assigned index id */
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#define DICT_HDR_MAX_SPACE_ID 24 /* The latest assigned space id,or 0*/
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#define DICT_HDR_MIX_ID_LOW 28 /* Obsolete,always DICT_HDR_FIRST_ID*/
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#define DICT_HDR_TABLES 32 /* Root of SYS_TABLES clust index */
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#define DICT_HDR_TABLE_IDS 36 /* Root of SYS_TABLE_IDS sec index */
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#define DICT_HDR_COLUMNS 40 /* Root of SYS_COLUMNS clust index */
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#define DICT_HDR_INDEXES 44 /* Root of SYS_INDEXES clust index */
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#define DICT_HDR_FIELDS 48 /* Root of SYS_FIELDS clust index */
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#define DICT_HDR_FSEG_HEADER 56 /* Segment header for the tablespace
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segment into which the dictionary
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header is created */
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/*-------------------------------------------------------------*/
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/* The columns in SYS_TABLES */
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enum dict_col_sys_tables_enum {
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DICT_COL__SYS_TABLES__NAME = 0,
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DICT_COL__SYS_TABLES__ID = 1,
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DICT_COL__SYS_TABLES__N_COLS = 2,
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DICT_COL__SYS_TABLES__TYPE = 3,
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DICT_COL__SYS_TABLES__MIX_ID = 4,
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DICT_COL__SYS_TABLES__MIX_LEN = 5,
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DICT_COL__SYS_TABLES__CLUSTER_ID = 6,
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DICT_COL__SYS_TABLES__SPACE = 7,
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DICT_NUM_COLS__SYS_TABLES = 8
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};
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/* The field numbers in the SYS_TABLES clustered index */
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enum dict_fld_sys_tables_enum {
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DICT_FLD__SYS_TABLES__NAME = 0,
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DICT_FLD__SYS_TABLES__DB_TRX_ID = 1,
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DICT_FLD__SYS_TABLES__DB_ROLL_PTR = 2,
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DICT_FLD__SYS_TABLES__ID = 3,
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DICT_FLD__SYS_TABLES__N_COLS = 4,
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DICT_FLD__SYS_TABLES__TYPE = 5,
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DICT_FLD__SYS_TABLES__MIX_ID = 6,
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DICT_FLD__SYS_TABLES__MIX_LEN = 7,
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DICT_FLD__SYS_TABLES__CLUSTER_ID = 8,
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DICT_FLD__SYS_TABLES__SPACE = 9,
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DICT_NUM_FIELDS__SYS_TABLES = 10
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};
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/* The field numbers in the SYS_TABLE_IDS index */
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enum dict_fld_sys_table_ids_enum {
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DICT_FLD__SYS_TABLE_IDS__ID = 0,
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DICT_FLD__SYS_TABLE_IDS__NAME = 1,
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DICT_NUM_FIELDS__SYS_TABLE_IDS = 2
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};
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/* The columns in SYS_COLUMNS */
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enum dict_col_sys_columns_enum {
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DICT_COL__SYS_COLUMNS__TABLE_ID = 0,
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DICT_COL__SYS_COLUMNS__POS = 1,
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DICT_COL__SYS_COLUMNS__NAME = 2,
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DICT_COL__SYS_COLUMNS__MTYPE = 3,
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DICT_COL__SYS_COLUMNS__PRTYPE = 4,
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DICT_COL__SYS_COLUMNS__LEN = 5,
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DICT_COL__SYS_COLUMNS__PREC = 6,
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DICT_NUM_COLS__SYS_COLUMNS = 7
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};
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/* The field numbers in the SYS_COLUMNS clustered index */
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enum dict_fld_sys_columns_enum {
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DICT_FLD__SYS_COLUMNS__TABLE_ID = 0,
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DICT_FLD__SYS_COLUMNS__POS = 1,
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DICT_FLD__SYS_COLUMNS__DB_TRX_ID = 2,
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DICT_FLD__SYS_COLUMNS__DB_ROLL_PTR = 3,
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DICT_FLD__SYS_COLUMNS__NAME = 4,
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DICT_FLD__SYS_COLUMNS__MTYPE = 5,
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DICT_FLD__SYS_COLUMNS__PRTYPE = 6,
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DICT_FLD__SYS_COLUMNS__LEN = 7,
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DICT_FLD__SYS_COLUMNS__PREC = 8,
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DICT_NUM_FIELDS__SYS_COLUMNS = 9
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};
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/* The columns in SYS_INDEXES */
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enum dict_col_sys_indexes_enum {
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DICT_COL__SYS_INDEXES__TABLE_ID = 0,
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DICT_COL__SYS_INDEXES__ID = 1,
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DICT_COL__SYS_INDEXES__NAME = 2,
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DICT_COL__SYS_INDEXES__N_FIELDS = 3,
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DICT_COL__SYS_INDEXES__TYPE = 4,
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DICT_COL__SYS_INDEXES__SPACE = 5,
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DICT_COL__SYS_INDEXES__PAGE_NO = 6,
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DICT_COL__SYS_INDEXES__MERGE_THRESHOLD = 7,
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DICT_NUM_COLS__SYS_INDEXES = 8
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};
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/* The field numbers in the SYS_INDEXES clustered index */
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enum dict_fld_sys_indexes_enum {
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DICT_FLD__SYS_INDEXES__TABLE_ID = 0,
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DICT_FLD__SYS_INDEXES__ID = 1,
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DICT_FLD__SYS_INDEXES__DB_TRX_ID = 2,
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DICT_FLD__SYS_INDEXES__DB_ROLL_PTR = 3,
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DICT_FLD__SYS_INDEXES__NAME = 4,
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DICT_FLD__SYS_INDEXES__N_FIELDS = 5,
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DICT_FLD__SYS_INDEXES__TYPE = 6,
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DICT_FLD__SYS_INDEXES__SPACE = 7,
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DICT_FLD__SYS_INDEXES__PAGE_NO = 8,
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DICT_FLD__SYS_INDEXES__MERGE_THRESHOLD = 9,
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DICT_NUM_FIELDS__SYS_INDEXES = 10
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};
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/* The columns in SYS_FIELDS */
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enum dict_col_sys_fields_enum {
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DICT_COL__SYS_FIELDS__INDEX_ID = 0,
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DICT_COL__SYS_FIELDS__POS = 1,
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DICT_COL__SYS_FIELDS__COL_NAME = 2,
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DICT_NUM_COLS__SYS_FIELDS = 3
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};
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/* The field numbers in the SYS_FIELDS clustered index */
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enum dict_fld_sys_fields_enum {
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DICT_FLD__SYS_FIELDS__INDEX_ID = 0,
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DICT_FLD__SYS_FIELDS__POS = 1,
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DICT_FLD__SYS_FIELDS__DB_TRX_ID = 2,
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DICT_FLD__SYS_FIELDS__DB_ROLL_PTR = 3,
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DICT_FLD__SYS_FIELDS__COL_NAME = 4,
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DICT_NUM_FIELDS__SYS_FIELDS = 5
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};
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/* The columns in SYS_FOREIGN */
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enum dict_col_sys_foreign_enum {
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DICT_COL__SYS_FOREIGN__ID = 0,
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DICT_COL__SYS_FOREIGN__FOR_NAME = 1,
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DICT_COL__SYS_FOREIGN__REF_NAME = 2,
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DICT_COL__SYS_FOREIGN__N_COLS = 3,
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DICT_NUM_COLS__SYS_FOREIGN = 4
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};
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/* The field numbers in the SYS_FOREIGN clustered index */
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enum dict_fld_sys_foreign_enum {
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DICT_FLD__SYS_FOREIGN__ID = 0,
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DICT_FLD__SYS_FOREIGN__DB_TRX_ID = 1,
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DICT_FLD__SYS_FOREIGN__DB_ROLL_PTR = 2,
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DICT_FLD__SYS_FOREIGN__FOR_NAME = 3,
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DICT_FLD__SYS_FOREIGN__REF_NAME = 4,
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DICT_FLD__SYS_FOREIGN__N_COLS = 5,
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DICT_NUM_FIELDS__SYS_FOREIGN = 6
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};
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/* The field numbers in the SYS_FOREIGN_FOR_NAME secondary index */
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enum dict_fld_sys_foreign_for_name_enum {
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DICT_FLD__SYS_FOREIGN_FOR_NAME__NAME = 0,
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DICT_FLD__SYS_FOREIGN_FOR_NAME__ID = 1,
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DICT_NUM_FIELDS__SYS_FOREIGN_FOR_NAME = 2
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};
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/* The columns in SYS_FOREIGN_COLS */
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enum dict_col_sys_foreign_cols_enum {
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DICT_COL__SYS_FOREIGN_COLS__ID = 0,
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DICT_COL__SYS_FOREIGN_COLS__POS = 1,
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DICT_COL__SYS_FOREIGN_COLS__FOR_COL_NAME = 2,
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DICT_COL__SYS_FOREIGN_COLS__REF_COL_NAME = 3,
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DICT_NUM_COLS__SYS_FOREIGN_COLS = 4
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};
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/* The field numbers in the SYS_FOREIGN_COLS clustered index */
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enum dict_fld_sys_foreign_cols_enum {
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DICT_FLD__SYS_FOREIGN_COLS__ID = 0,
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DICT_FLD__SYS_FOREIGN_COLS__POS = 1,
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DICT_FLD__SYS_FOREIGN_COLS__DB_TRX_ID = 2,
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DICT_FLD__SYS_FOREIGN_COLS__DB_ROLL_PTR = 3,
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DICT_FLD__SYS_FOREIGN_COLS__FOR_COL_NAME = 4,
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DICT_FLD__SYS_FOREIGN_COLS__REF_COL_NAME = 5,
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DICT_NUM_FIELDS__SYS_FOREIGN_COLS = 6
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};
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/* The columns in SYS_VIRTUAL */
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enum dict_col_sys_virtual_enum {
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DICT_COL__SYS_VIRTUAL__TABLE_ID = 0,
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DICT_COL__SYS_VIRTUAL__POS = 1,
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DICT_COL__SYS_VIRTUAL__BASE_POS = 2,
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DICT_NUM_COLS__SYS_VIRTUAL = 3
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};
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/* The field numbers in the SYS_VIRTUAL clustered index */
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enum dict_fld_sys_virtual_enum {
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DICT_FLD__SYS_VIRTUAL__TABLE_ID = 0,
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DICT_FLD__SYS_VIRTUAL__POS = 1,
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DICT_FLD__SYS_VIRTUAL__BASE_POS = 2,
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DICT_FLD__SYS_VIRTUAL__DB_TRX_ID = 3,
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DICT_FLD__SYS_VIRTUAL__DB_ROLL_PTR = 4,
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DICT_NUM_FIELDS__SYS_VIRTUAL = 5
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};
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/* A number of the columns above occur in multiple tables. These are the
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length of thos fields. */
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#define DICT_FLD_LEN_SPACE 4
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#define DICT_FLD_LEN_FLAGS 4
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#endif
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