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641.1.2
by Monty Taylor
Imported 1.0.1 with clean - with no changes. |
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/******************************************************
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Data dictionary creation and booting
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(c) 1996 Innobase Oy
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Created 4/18/1996 Heikki Tuuri
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*******************************************************/
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#ifndef dict0boot_h
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#define dict0boot_h
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#include "univ.i" |
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#include "mtr0mtr.h" |
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#include "mtr0log.h" |
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#include "ut0byte.h" |
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#include "buf0buf.h" |
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#include "fsp0fsp.h" |
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#include "dict0dict.h" |
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typedef byte dict_hdr_t; |
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/**************************************************************************
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Gets a pointer to the dictionary header and x-latches its page. */
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UNIV_INTERN
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dict_hdr_t* |
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dict_hdr_get( |
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/*=========*/
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/* out: pointer to the dictionary header,
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page x-latched */
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mtr_t* mtr); /* in: mtr */ |
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/**************************************************************************
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Returns a new row, table, index, or tree id. */
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UNIV_INTERN
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dulint
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dict_hdr_get_new_id( |
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/*================*/
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/* out: the new id */
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ulint type); /* in: DICT_HDR_ROW_ID, ... */ |
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/**************************************************************************
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Returns a new row id. */
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UNIV_INLINE
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dulint
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dict_sys_get_new_row_id(void); |
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/*=========================*/
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/* out: the new id */
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/**************************************************************************
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Reads a row id from a record or other 6-byte stored form. */
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UNIV_INLINE
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dulint
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dict_sys_read_row_id( |
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/*=================*/
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/* out: row id */
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byte* field); /* in: record field */ |
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/**************************************************************************
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Writes a row id to a record or other 6-byte stored form. */
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UNIV_INLINE
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void
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dict_sys_write_row_id( |
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/*==================*/
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byte* field, /* in: record field */ |
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dulint row_id);/* in: row id */ |
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/*********************************************************************
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Initializes the data dictionary memory structures when the database is
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started. This function is also called when the data dictionary is created. */
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UNIV_INTERN
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void
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dict_boot(void); |
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/*===========*/
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/*********************************************************************
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Creates and initializes the data dictionary at the database creation. */
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UNIV_INTERN
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void
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dict_create(void); |
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/*=============*/
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/* 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 ut_dulint_create(0, 1)
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#define DICT_COLUMNS_ID ut_dulint_create(0, 2)
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#define DICT_INDEXES_ID ut_dulint_create(0, 3)
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#define DICT_FIELDS_ID ut_dulint_create(0, 4)
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/* The following is a secondary index on SYS_TABLES */
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#define DICT_TABLE_IDS_ID ut_dulint_create(0, 5)
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#define DICT_HDR_FIRST_ID 10 /* the ids for tables etc. start |
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from this number, except for basic
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system tables and their above defined
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indexes; ibuf tables and indexes are
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assigned as the id the number
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DICT_IBUF_ID_MIN plus the space id */
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#define DICT_IBUF_ID_MIN ut_dulint_create(0xFFFFFFFFUL, 0)
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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_MIX_ID 24 /* Obsolete, always 0. */ |
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#define DICT_HDR_TABLES 32 /* Root of the table index tree */ |
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#define DICT_HDR_TABLE_IDS 36 /* Root of the table index tree */ |
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#define DICT_HDR_COLUMNS 40 /* Root of the column index tree */ |
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#define DICT_HDR_INDEXES 44 /* Root of the index index tree */ |
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#define DICT_HDR_FIELDS 48 /* Root of the index field |
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index tree */
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#define DICT_HDR_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 field number of the page number field in the sys_indexes table
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clustered index */
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#define DICT_SYS_INDEXES_PAGE_NO_FIELD 8
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#define DICT_SYS_INDEXES_SPACE_NO_FIELD 7
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#define DICT_SYS_INDEXES_TYPE_FIELD 6
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/* When a row id which is zero modulo this number (which must be a power of
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two) is assigned, the field DICT_HDR_ROW_ID on the dictionary header page is
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updated */
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#define DICT_HDR_ROW_ID_WRITE_MARGIN 256
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#ifndef UNIV_NONINL
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#include "dict0boot.ic" |
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#endif
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#endif
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