mirror of
https://github.com/MariaDB/server.git
synced 2025-07-18 23:03:28 +03:00
47010ccffa
- Major rewrite of ddl_log.cc and ddl_log.h
- ddl_log.cc described in the beginning how the recovery works.
- ddl_log.log has unique signature and is dynamic. It's easy to
add more information to the header and other ddl blocks while still
being able to execute old ddl entries.
- IO_SIZE for ddl blocks is now dynamic. Can be changed without affecting
recovery of old logs.
- Code is more modular and is now usable outside of partition handling.
- Renamed log file to dll_recovery.log and added option --log-ddl-recovery
to allow one to specify the path & filename.
- Added ddl_log_entry_phase[], number of phases for each DDL action,
which allowed me to greatly simply set_global_from_ddl_log_entry()
- Changed how strings are stored in log entries, which allows us to
store much more information in a log entry.
- ddl log is now always created at start and deleted on normal shutdown.
This simplices things notable.
- Added probes debug_crash_here() and debug_simulate_error() to simply
crash testing and allow crash after a given number of times a probe
is executed. See comments in debug_sync.cc and rename_table.test for
how this can be used.
- Reverting failed table and view renames is done trough the ddl log.
This ensures that the ddl log is tested also outside of recovery.
- Added helper function 'handler::needs_lower_case_filenames()'
- Extend binary log with Q_XID events. ddl log handling is using this
to check if a ddl log entry was logged to the binary log (if yes,
it will be deleted from the log during ddl_log_close_binlogged_events()
- If a DDL entry fails 3 time, disable it. This is to ensure that if
we have a crash in ddl recovery code the server will not get stuck
in a forever crash-restart-crash loop.
mysqltest.cc changes:
- --die will now replace $variables with their values
- $error will contain the error of the last failed statement
storage engine changes:
- maria_rename() was changed to be more robust against crashes during
rename.
213 lines
9.1 KiB
C++
213 lines
9.1 KiB
C++
/* Copyright (c) 2006, 2014, Oracle and/or its affiliates.
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Copyright (c) 2011, 2017, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#ifndef SQL_TABLE_INCLUDED
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#define SQL_TABLE_INCLUDED
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#include <my_sys.h> // pthread_mutex_t
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#include "m_string.h" // LEX_CUSTRING
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class Alter_info;
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class Alter_table_ctx;
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class Column_definition;
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class Create_field;
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struct TABLE_LIST;
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class THD;
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struct TABLE;
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struct handlerton;
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class handler;
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class String;
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typedef struct st_ha_check_opt HA_CHECK_OPT;
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struct HA_CREATE_INFO;
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struct Table_specification_st;
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typedef struct st_key KEY;
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typedef struct st_key_cache KEY_CACHE;
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typedef struct st_lock_param_type ALTER_PARTITION_PARAM_TYPE;
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typedef struct st_order ORDER;
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enum enum_explain_filename_mode
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{
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EXPLAIN_ALL_VERBOSE= 0,
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EXPLAIN_PARTITIONS_VERBOSE,
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EXPLAIN_PARTITIONS_AS_COMMENT
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};
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/* depends on errmsg.txt Database `db`, Table `t` ... */
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#define EXPLAIN_FILENAME_MAX_EXTRA_LENGTH 63
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#define WFRM_WRITE_SHADOW 1
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#define WFRM_INSTALL_SHADOW 2
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#define WFRM_KEEP_SHARE 4
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/* Flags for conversion functions. */
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static const uint FN_FROM_IS_TMP= 1 << 0;
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static const uint FN_TO_IS_TMP= 1 << 1;
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static const uint FN_IS_TMP= FN_FROM_IS_TMP | FN_TO_IS_TMP;
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static const uint NO_FRM_RENAME= 1 << 2;
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static const uint FRM_ONLY= 1 << 3;
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/** Don't remove table in engine. Remove only .FRM and maybe .PAR files. */
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static const uint NO_HA_TABLE= 1 << 4;
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/** Don't resolve MySQL's fake "foo.sym" symbolic directory names. */
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static const uint SKIP_SYMDIR_ACCESS= 1 << 5;
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/** Don't check foreign key constraints while renaming table */
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static const uint NO_FK_CHECKS= 1 << 6;
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/* Don't delete .par table in quick_rm_table() */
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static const uint NO_PAR_TABLE= 1 << 7;
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uint filename_to_tablename(const char *from, char *to, size_t to_length,
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bool stay_quiet = false);
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uint tablename_to_filename(const char *from, char *to, size_t to_length);
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uint check_n_cut_mysql50_prefix(const char *from, char *to, size_t to_length);
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bool check_mysql50_prefix(const char *name);
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uint build_table_filename(char *buff, size_t bufflen, const char *db,
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const char *table, const char *ext, uint flags);
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uint build_table_shadow_filename(char *buff, size_t bufflen,
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ALTER_PARTITION_PARAM_TYPE *lpt);
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void build_lower_case_table_filename(char *buff, size_t bufflen,
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const LEX_CSTRING *db,
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const LEX_CSTRING *table,
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uint flags);
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uint build_tmptable_filename(THD* thd, char *buff, size_t bufflen);
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bool mysql_create_table(THD *thd, TABLE_LIST *create_table,
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Table_specification_st *create_info,
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Alter_info *alter_info);
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bool add_keyword_to_query(THD *thd, String *result, const LEX_CSTRING *keyword,
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const LEX_CSTRING *add);
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/*
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mysql_create_table_no_lock can be called in one of the following
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mutually exclusive situations:
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- Just a normal ordinary CREATE TABLE statement that explicitly
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defines the table structure.
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- CREATE TABLE ... SELECT. It is special, because only in this case,
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the list of fields is allowed to have duplicates, as long as one of the
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duplicates comes from the select list, and the other doesn't. For
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example in
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CREATE TABLE t1 (a int(5) NOT NUL) SELECT b+10 as a FROM t2;
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the list in alter_info->create_list will have two fields `a`.
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- ALTER TABLE, that creates a temporary table #sql-xxx, which will be later
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renamed to replace the original table.
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- ALTER TABLE as above, but which only modifies the frm file, it only
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creates an frm file for the #sql-xxx, the table in the engine is not
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created.
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- Assisted discovery, CREATE TABLE statement without the table structure.
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These situations are distinguished by the following "create table mode"
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values, where a CREATE ... SELECT is denoted by any non-negative number
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(which should be the number of fields in the SELECT ... part), and other
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cases use constants as defined below.
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*/
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#define C_CREATE_SELECT(X) ((X) > 0 ? (X) : 0)
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#define C_ORDINARY_CREATE 0
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#define C_ALTER_TABLE -1
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#define C_ALTER_TABLE_FRM_ONLY -2
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#define C_ASSISTED_DISCOVERY -3
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int mysql_create_table_no_lock(THD *thd, const LEX_CSTRING *db,
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const LEX_CSTRING *table_name,
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Table_specification_st *create_info,
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Alter_info *alter_info, bool *is_trans,
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int create_table_mode, TABLE_LIST *table);
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handler *mysql_create_frm_image(THD *thd,
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const LEX_CSTRING &db,
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const LEX_CSTRING &table_name,
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HA_CREATE_INFO *create_info,
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Alter_info *alter_info,
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int create_table_mode,
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KEY **key_info,
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uint *key_count,
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LEX_CUSTRING *frm);
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int mysql_discard_or_import_tablespace(THD *thd,
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TABLE_LIST *table_list,
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bool discard);
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bool mysql_prepare_alter_table(THD *thd, TABLE *table,
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HA_CREATE_INFO *create_info,
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Alter_info *alter_info,
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Alter_table_ctx *alter_ctx);
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bool mysql_trans_prepare_alter_copy_data(THD *thd);
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bool mysql_trans_commit_alter_copy_data(THD *thd);
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bool mysql_alter_table(THD *thd, const LEX_CSTRING *new_db,
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const LEX_CSTRING *new_name,
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HA_CREATE_INFO *create_info,
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TABLE_LIST *table_list,
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Alter_info *alter_info,
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uint order_num, ORDER *order, bool ignore,
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bool if_exists);
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bool mysql_compare_tables(TABLE *table,
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Alter_info *alter_info,
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HA_CREATE_INFO *create_info,
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bool *metadata_equal);
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bool mysql_recreate_table(THD *thd, TABLE_LIST *table_list, bool table_copy);
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bool mysql_create_like_table(THD *thd, TABLE_LIST *table,
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TABLE_LIST *src_table,
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Table_specification_st *create_info);
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bool mysql_rename_table(handlerton *base, const LEX_CSTRING *old_db,
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const LEX_CSTRING *old_name, const LEX_CSTRING *new_db,
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const LEX_CSTRING *new_name, uint flags);
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bool mysql_backup_table(THD* thd, TABLE_LIST* table_list);
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bool mysql_restore_table(THD* thd, TABLE_LIST* table_list);
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bool mysql_checksum_table(THD* thd, TABLE_LIST* table_list,
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HA_CHECK_OPT* check_opt);
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bool mysql_rm_table(THD *thd,TABLE_LIST *tables, bool if_exists,
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bool drop_temporary, bool drop_sequence,
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bool dont_log_query);
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int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
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bool drop_temporary, bool drop_view,
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bool drop_sequence,
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bool dont_log_query, bool dont_free_locks);
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bool log_drop_table(THD *thd, const LEX_CSTRING *db_name,
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const LEX_CSTRING *table_name, bool temporary_table);
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bool quick_rm_table(THD *thd, handlerton *base, const LEX_CSTRING *db,
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const LEX_CSTRING *table_name, uint flags,
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const char *table_path=0);
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void close_cached_table(THD *thd, TABLE *table);
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void sp_prepare_create_field(THD *thd, Column_definition *sql_field);
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bool mysql_write_frm(ALTER_PARTITION_PARAM_TYPE *lpt, uint flags);
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int write_bin_log(THD *thd, bool clear_error,
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char const *query, ulong query_length,
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bool is_trans= FALSE);
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int write_bin_log_with_if_exists(THD *thd, bool clear_error,
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bool is_trans, bool add_if_exists);
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template<typename T> class List;
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void promote_first_timestamp_column(List<Create_field> *column_definitions);
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/*
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These prototypes where under INNODB_COMPATIBILITY_HOOKS.
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*/
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uint explain_filename(THD* thd, const char *from, char *to, uint to_length,
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enum_explain_filename_mode explain_mode);
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extern MYSQL_PLUGIN_IMPORT const LEX_CSTRING primary_key_name;
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bool check_engine(THD *, const char *, const char *, HA_CREATE_INFO *);
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#endif /* SQL_TABLE_INCLUDED */
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