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197 lines
7.2 KiB
C
197 lines
7.2 KiB
C
/*****************************************************************************
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Copyright (c) 2005, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/row0merge.h
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Index build routines using a merge sort
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Created 13/06/2005 Jan Lindstrom
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*******************************************************/
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#ifndef row0merge_h
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#define row0merge_h
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#include "univ.i"
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#include "data0data.h"
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#include "dict0types.h"
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#include "trx0types.h"
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#include "que0types.h"
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#include "mtr0mtr.h"
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#include "rem0types.h"
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#include "rem0rec.h"
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#include "read0types.h"
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#include "btr0types.h"
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#include "row0mysql.h"
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#include "lock0types.h"
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/** Index field definition */
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struct merge_index_field_struct {
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ulint prefix_len; /*!< column prefix length, or 0
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if indexing the whole column */
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const char* field_name; /*!< field name */
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};
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/** Index field definition */
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typedef struct merge_index_field_struct merge_index_field_t;
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/** Definition of an index being created */
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struct merge_index_def_struct {
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const char* name; /*!< index name */
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ulint ind_type; /*!< 0, DICT_UNIQUE,
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or DICT_CLUSTERED */
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ulint n_fields; /*!< number of fields
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in index */
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merge_index_field_t* fields; /*!< field definitions */
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};
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/** Definition of an index being created */
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typedef struct merge_index_def_struct merge_index_def_t;
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/*********************************************************************//**
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Sets an exclusive lock on a table, for the duration of creating indexes.
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@return error code or DB_SUCCESS */
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UNIV_INTERN
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ulint
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row_merge_lock_table(
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/*=================*/
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trx_t* trx, /*!< in/out: transaction */
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dict_table_t* table, /*!< in: table to lock */
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enum lock_mode mode); /*!< in: LOCK_X or LOCK_S */
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/*********************************************************************//**
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Drop an index from the InnoDB system tables. The data dictionary must
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have been locked exclusively by the caller, because the transaction
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will not be committed. */
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UNIV_INTERN
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void
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row_merge_drop_index(
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/*=================*/
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dict_index_t* index, /*!< in: index to be removed */
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dict_table_t* table, /*!< in: table */
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trx_t* trx); /*!< in: transaction handle */
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/*********************************************************************//**
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Drop those indexes which were created before an error occurred when
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building an index. The data dictionary must have been locked
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exclusively by the caller, because the transaction will not be
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committed. */
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UNIV_INTERN
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void
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row_merge_drop_indexes(
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/*===================*/
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trx_t* trx, /*!< in: transaction */
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dict_table_t* table, /*!< in: table containing the indexes */
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dict_index_t** index, /*!< in: indexes to drop */
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ulint num_created); /*!< in: number of elements in index[] */
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/*********************************************************************//**
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Drop all partially created indexes during crash recovery. */
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UNIV_INTERN
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void
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row_merge_drop_temp_indexes(void);
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/*=============================*/
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/*********************************************************************//**
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Rename the tables in the data dictionary. The data dictionary must
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have been locked exclusively by the caller, because the transaction
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will not be committed.
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@return error code or DB_SUCCESS */
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UNIV_INTERN
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ulint
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row_merge_rename_tables(
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/*====================*/
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dict_table_t* old_table, /*!< in/out: old table, renamed to
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tmp_name */
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dict_table_t* new_table, /*!< in/out: new table, renamed to
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old_table->name */
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const char* tmp_name, /*!< in: new name for old_table */
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trx_t* trx); /*!< in: transaction handle */
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/*********************************************************************//**
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Create a temporary table for creating a primary key, using the definition
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of an existing table.
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@return table, or NULL on error */
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UNIV_INTERN
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dict_table_t*
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row_merge_create_temporary_table(
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/*=============================*/
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const char* table_name, /*!< in: new table name */
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const merge_index_def_t*index_def, /*!< in: the index definition
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of the primary key */
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const dict_table_t* table, /*!< in: old table definition */
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trx_t* trx); /*!< in/out: transaction
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(sets error_state) */
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/*********************************************************************//**
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Rename the temporary indexes in the dictionary to permanent ones. The
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data dictionary must have been locked exclusively by the caller,
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because the transaction will not be committed.
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@return DB_SUCCESS if all OK */
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UNIV_INTERN
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ulint
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row_merge_rename_indexes(
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/*=====================*/
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trx_t* trx, /*!< in/out: transaction */
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dict_table_t* table); /*!< in/out: table with new indexes */
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/*********************************************************************//**
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Create the index and load in to the dictionary.
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@return index, or NULL on error */
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UNIV_INTERN
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dict_index_t*
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row_merge_create_index(
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/*===================*/
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trx_t* trx, /*!< in/out: trx (sets error_state) */
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dict_table_t* table, /*!< in: the index is on this table */
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const merge_index_def_t*index_def);
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/*!< in: the index definition */
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/*********************************************************************//**
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Check if a transaction can use an index.
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@return TRUE if index can be used by the transaction else FALSE */
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UNIV_INTERN
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ibool
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row_merge_is_index_usable(
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/*======================*/
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const trx_t* trx, /*!< in: transaction */
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const dict_index_t* index); /*!< in: index to check */
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/*********************************************************************//**
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If there are views that refer to the old table name then we "attach" to
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the new instance of the table else we drop it immediately.
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@return DB_SUCCESS or error code */
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UNIV_INTERN
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ulint
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row_merge_drop_table(
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/*=================*/
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trx_t* trx, /*!< in: transaction */
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dict_table_t* table); /*!< in: table instance to drop */
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/*********************************************************************//**
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Build indexes on a table by reading a clustered index,
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creating a temporary file containing index entries, merge sorting
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these index entries and inserting sorted index entries to indexes.
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@return DB_SUCCESS or error code */
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UNIV_INTERN
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ulint
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row_merge_build_indexes(
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/*====================*/
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trx_t* trx, /*!< in: transaction */
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dict_table_t* old_table, /*!< in: table where rows are
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read from */
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dict_table_t* new_table, /*!< in: table where indexes are
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created; identical to old_table
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unless creating a PRIMARY KEY */
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dict_index_t** indexes, /*!< in: indexes to be created */
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ulint n_indexes, /*!< in: size of indexes[] */
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TABLE* table); /*!< in/out: MySQL table, for
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reporting erroneous key value
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if applicable */
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#endif /* row0merge.h */
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