2005-01-03 20:04:33 +01:00
drop table if exists t1,t1aa,t2aa;
2004-03-10 19:54:07 +01:00
show tables;
2004-10-10 12:15:14 +02:00
Tables_in_db
columns_priv
db
2006-01-10 19:16:58 +01:00
event
2004-10-10 12:15:14 +02:00
func
2006-01-19 03:56:06 +01:00
general_log
2004-10-10 12:15:14 +02:00
help_category
help_keyword
help_relation
help_topic
host
2006-12-01 15:49:07 +01:00
ndb_binlog_index
2005-11-06 13:13:06 +01:00
plugin
2004-10-10 12:15:14 +02:00
proc
2004-12-23 11:46:24 +01:00
procs_priv
2006-12-09 04:19:51 +01:00
servers
2006-01-19 03:56:06 +01:00
slow_log
2004-10-10 12:15:14 +02:00
tables_priv
time_zone
time_zone_leap_second
time_zone_name
time_zone_transition
time_zone_transition_type
user
2004-03-10 19:54:07 +01:00
show create table db;
Table Create Table
db CREATE TABLE `db` (
2006-02-22 10:09:59 +01:00
`Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
`Db` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`User` char(16) COLLATE utf8_bin NOT NULL DEFAULT '',
`Select_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Insert_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Update_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Delete_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Drop_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Grant_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`References_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Index_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_tmp_table_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Lock_tables_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Execute_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Event_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Trigger_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`Host`,`Db`,`User`),
2004-03-10 19:54:07 +01:00
KEY `User` (`User`)
2004-09-02 09:34:27 +02:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Database privileges'
2004-03-10 19:54:07 +01:00
show create table host;
Table Create Table
host CREATE TABLE `host` (
2006-02-22 10:09:59 +01:00
`Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
`Db` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`Select_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Insert_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Update_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Delete_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Drop_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Grant_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`References_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Index_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_tmp_table_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Lock_tables_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Execute_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Trigger_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`Host`,`Db`)
2004-09-02 09:34:27 +02:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Host privileges; Merged with database privileges'
2004-03-10 19:54:07 +01:00
show create table user;
Table Create Table
user CREATE TABLE `user` (
2006-02-22 10:09:59 +01:00
`Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
`User` char(16) COLLATE utf8_bin NOT NULL DEFAULT '',
`Password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT '',
`Select_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Insert_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Update_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Delete_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Drop_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Reload_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Shutdown_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Process_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`File_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Grant_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`References_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Index_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_db_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Super_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_tmp_table_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Lock_tables_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Execute_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Repl_slave_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Repl_client_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Show_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Alter_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Create_user_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Event_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`Trigger_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
`ssl_type` enum('','ANY','X509','SPECIFIED') CHARACTER SET utf8 NOT NULL DEFAULT '',
2004-03-10 19:54:07 +01:00
`ssl_cipher` blob NOT NULL,
`x509_issuer` blob NOT NULL,
`x509_subject` blob NOT NULL,
2006-02-22 10:09:59 +01:00
`max_questions` int(11) unsigned NOT NULL DEFAULT '0',
`max_updates` int(11) unsigned NOT NULL DEFAULT '0',
`max_connections` int(11) unsigned NOT NULL DEFAULT '0',
`max_user_connections` int(11) unsigned NOT NULL DEFAULT '0',
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`Host`,`User`)
2004-09-02 09:34:27 +02:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Users and global privileges'
2004-03-10 19:54:07 +01:00
show create table func;
Table Create Table
func CREATE TABLE `func` (
2006-02-22 10:09:59 +01:00
`name` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`ret` tinyint(1) NOT NULL DEFAULT '0',
`dl` char(128) COLLATE utf8_bin NOT NULL DEFAULT '',
`type` enum('function','aggregate') CHARACTER SET utf8 NOT NULL,
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`name`)
2004-09-02 09:34:27 +02:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='User defined functions'
2004-03-10 19:54:07 +01:00
show create table tables_priv;
Table Create Table
tables_priv CREATE TABLE `tables_priv` (
2006-02-22 10:09:59 +01:00
`Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
`Db` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`User` char(16) COLLATE utf8_bin NOT NULL DEFAULT '',
`Table_name` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`Grantor` char(77) COLLATE utf8_bin NOT NULL DEFAULT '',
`Timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`Table_priv` set('Select','Insert','Update','Delete','Create','Drop','Grant','References','Index','Alter','Create View','Show view','Trigger') CHARACTER SET utf8 NOT NULL DEFAULT '',
`Column_priv` set('Select','Insert','Update','References') CHARACTER SET utf8 NOT NULL DEFAULT '',
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`Host`,`Db`,`User`,`Table_name`),
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KEY `Grantor` (`Grantor`)
2004-09-02 09:34:27 +02:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Table privileges'
2004-03-10 19:54:07 +01:00
show create table columns_priv;
Table Create Table
columns_priv CREATE TABLE `columns_priv` (
2006-02-22 10:09:59 +01:00
`Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
`Db` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`User` char(16) COLLATE utf8_bin NOT NULL DEFAULT '',
`Table_name` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`Column_name` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`Timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`Column_priv` set('Select','Insert','Update','References') CHARACTER SET utf8 NOT NULL DEFAULT '',
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`Host`,`Db`,`User`,`Table_name`,`Column_name`)
2004-09-02 09:34:27 +02:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Column privileges'
2004-12-23 11:46:24 +01:00
show create table procs_priv;
Table Create Table
procs_priv CREATE TABLE `procs_priv` (
2006-02-22 10:09:59 +01:00
`Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
`Db` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`User` char(16) COLLATE utf8_bin NOT NULL DEFAULT '',
`Routine_name` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',
`Routine_type` enum('FUNCTION','PROCEDURE') COLLATE utf8_bin NOT NULL,
`Grantor` char(77) COLLATE utf8_bin NOT NULL DEFAULT '',
`Proc_priv` set('Execute','Alter Routine','Grant') CHARACTER SET utf8 NOT NULL DEFAULT '',
`Timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`Host`,`Db`,`User`,`Routine_name`,`Routine_type`),
2004-12-23 11:46:24 +01:00
KEY `Grantor` (`Grantor`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Procedure privileges'
2006-12-11 17:44:03 +01:00
show create table servers;
Table Create Table
servers CREATE TABLE `servers` (
`Server_name` char(64) NOT NULL DEFAULT '',
`Host` char(64) NOT NULL DEFAULT '',
`Db` char(64) NOT NULL DEFAULT '',
`Username` char(64) NOT NULL DEFAULT '',
`Password` char(64) NOT NULL DEFAULT '',
`Port` int(4) NOT NULL DEFAULT '0',
`Socket` char(64) NOT NULL DEFAULT '',
`Wrapper` char(64) NOT NULL DEFAULT '',
`Owner` char(64) NOT NULL DEFAULT '',
PRIMARY KEY (`Server_name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='MySQL Foreign Servers table'
2005-03-09 02:40:43 +01:00
show create table proc;
Table Create Table
proc CREATE TABLE `proc` (
2006-02-22 10:09:59 +01:00
`db` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
`name` char(64) NOT NULL DEFAULT '',
2005-05-13 13:44:14 +02:00
`type` enum('FUNCTION','PROCEDURE') NOT NULL,
2006-02-22 10:09:59 +01:00
`specific_name` char(64) NOT NULL DEFAULT '',
`language` enum('SQL') NOT NULL DEFAULT 'SQL',
`sql_data_access` enum('CONTAINS_SQL','NO_SQL','READS_SQL_DATA','MODIFIES_SQL_DATA') NOT NULL DEFAULT 'CONTAINS_SQL',
`is_deterministic` enum('YES','NO') NOT NULL DEFAULT 'NO',
`security_type` enum('INVOKER','DEFINER') NOT NULL DEFAULT 'DEFINER',
2005-03-09 02:40:43 +01:00
`param_list` blob NOT NULL,
2007-10-17 13:44:22 +02:00
`returns` longblob NOT NULL,
2005-07-27 03:08:49 +02:00
`body` longblob NOT NULL,
2006-02-22 10:09:59 +01:00
`definer` char(77) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
`created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`modified` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`sql_mode` set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES','IGNORE_SPACE','NOT_USED','ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION','NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB','NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40','ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES','STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES','ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER','HIGH_NOT_PRECEDENCE') NOT NULL DEFAULT '',
`comment` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
Patch for the following bugs:
- BUG#11986: Stored routines and triggers can fail if the code
has a non-ascii symbol
- BUG#16291: mysqldump corrupts string-constants with non-ascii-chars
- BUG#19443: INFORMATION_SCHEMA does not support charsets properly
- BUG#21249: Character set of SP-var can be ignored
- BUG#25212: Character set of string constant is ignored (stored routines)
- BUG#25221: Character set of string constant is ignored (triggers)
There were a few general problems that caused these bugs:
1. Character set information of the original (definition) query for views,
triggers, stored routines and events was lost.
2. mysqldump output query in client character set, which can be
inappropriate to encode definition-query.
3. INFORMATION_SCHEMA used strings with mixed encodings to display object
definition;
1. No query-definition-character set.
In order to compile query into execution code, some extra data (such as
environment variables or the database character set) is used. The problem
here was that this context was not preserved. So, on the next load it can
differ from the original one, thus the result will be different.
The context contains the following data:
- client character set;
- connection collation (character set and collation);
- collation of the owner database;
The fix is to store this context and use it each time we parse (compile)
and execute the object (stored routine, trigger, ...).
2. Wrong mysqldump-output.
The original query can contain several encodings (by means of character set
introducers). The problem here was that we tried to convert original query
to the mysqldump-client character set.
Moreover, we stored queries in different character sets for different
objects (views, for one, used UTF8, triggers used original character set).
The solution is
- to store definition queries in the original character set;
- to change SHOW CREATE statement to output definition query in the
binary character set (i.e. without any conversion);
- introduce SHOW CREATE TRIGGER statement;
- to dump special statements to switch the context to the original one
before dumping and restore it afterwards.
Note, in order to preserve the database collation at the creation time,
additional ALTER DATABASE might be used (to temporary switch the database
collation back to the original value). In this case, ALTER DATABASE
privilege will be required. This is a backward-incompatible change.
3. INFORMATION_SCHEMA showed non-UTF8 strings
The fix is to generate UTF8-query during the parsing, store it in the object
and show it in the INFORMATION_SCHEMA.
Basically, the idea is to create a copy of the original query convert it to
UTF8. Character set introducers are removed and all text literals are
converted to UTF8.
This UTF8 query is intended to provide user-readable output. It must not be
used to recreate the object. Specialized SHOW CREATE statements should be
used for this.
The reason for this limitation is the following: the original query can
contain symbols from several character sets (by means of character set
introducers).
Example:
- original query:
CREATE VIEW v1 AS SELECT _cp1251 'Hello' AS c1;
- UTF8 query (for INFORMATION_SCHEMA):
CREATE VIEW v1 AS SELECT 'Hello' AS c1;
2007-06-28 19:34:54 +02:00
`character_set_client` char(32) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
`collation_connection` char(32) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
`db_collation` char(32) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
`body_utf8` longblob,
2006-02-02 20:39:28 +01:00
PRIMARY KEY (`db`,`name`,`type`)
2005-07-11 15:57:46 +02:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='Stored Procedures'
2006-01-26 23:03:46 +01:00
show create table event;
Table Create Table
event CREATE TABLE `event` (
2006-02-22 10:09:59 +01:00
`db` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
2006-03-25 13:14:52 +01:00
`name` char(64) NOT NULL DEFAULT '',
2006-01-26 23:03:46 +01:00
`body` longblob NOT NULL,
2006-02-22 10:09:59 +01:00
`definer` char(77) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
`execute_at` datetime DEFAULT NULL,
`interval_value` int(11) DEFAULT NULL,
`interval_field` enum('YEAR','QUARTER','MONTH','DAY','HOUR','MINUTE','WEEK','SECOND','MICROSECOND','YEAR_MONTH','DAY_HOUR','DAY_MINUTE','DAY_SECOND','HOUR_MINUTE','HOUR_SECOND','MINUTE_SECOND','DAY_MICROSECOND','HOUR_MICROSECOND','MINUTE_MICROSECOND','SECOND_MICROSECOND') DEFAULT NULL,
`created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`modified` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`last_executed` datetime DEFAULT NULL,
`starts` datetime DEFAULT NULL,
`ends` datetime DEFAULT NULL,
2007-03-16 14:56:57 +01:00
`status` enum('ENABLED','DISABLED','SLAVESIDE_DISABLED') NOT NULL DEFAULT 'ENABLED',
2006-02-22 10:09:59 +01:00
`on_completion` enum('DROP','PRESERVE') NOT NULL DEFAULT 'DROP',
`sql_mode` set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES','IGNORE_SPACE','NOT_USED','ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION','NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB','NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40','ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES','STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES','ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER','HIGH_NOT_PRECEDENCE') NOT NULL DEFAULT '',
`comment` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '',
2007-03-16 14:56:57 +01:00
`originator` int(10) NOT NULL,
2007-03-16 15:31:07 +01:00
`time_zone` char(64) CHARACTER SET latin1 NOT NULL DEFAULT 'SYSTEM',
Patch for the following bugs:
- BUG#11986: Stored routines and triggers can fail if the code
has a non-ascii symbol
- BUG#16291: mysqldump corrupts string-constants with non-ascii-chars
- BUG#19443: INFORMATION_SCHEMA does not support charsets properly
- BUG#21249: Character set of SP-var can be ignored
- BUG#25212: Character set of string constant is ignored (stored routines)
- BUG#25221: Character set of string constant is ignored (triggers)
There were a few general problems that caused these bugs:
1. Character set information of the original (definition) query for views,
triggers, stored routines and events was lost.
2. mysqldump output query in client character set, which can be
inappropriate to encode definition-query.
3. INFORMATION_SCHEMA used strings with mixed encodings to display object
definition;
1. No query-definition-character set.
In order to compile query into execution code, some extra data (such as
environment variables or the database character set) is used. The problem
here was that this context was not preserved. So, on the next load it can
differ from the original one, thus the result will be different.
The context contains the following data:
- client character set;
- connection collation (character set and collation);
- collation of the owner database;
The fix is to store this context and use it each time we parse (compile)
and execute the object (stored routine, trigger, ...).
2. Wrong mysqldump-output.
The original query can contain several encodings (by means of character set
introducers). The problem here was that we tried to convert original query
to the mysqldump-client character set.
Moreover, we stored queries in different character sets for different
objects (views, for one, used UTF8, triggers used original character set).
The solution is
- to store definition queries in the original character set;
- to change SHOW CREATE statement to output definition query in the
binary character set (i.e. without any conversion);
- introduce SHOW CREATE TRIGGER statement;
- to dump special statements to switch the context to the original one
before dumping and restore it afterwards.
Note, in order to preserve the database collation at the creation time,
additional ALTER DATABASE might be used (to temporary switch the database
collation back to the original value). In this case, ALTER DATABASE
privilege will be required. This is a backward-incompatible change.
3. INFORMATION_SCHEMA showed non-UTF8 strings
The fix is to generate UTF8-query during the parsing, store it in the object
and show it in the INFORMATION_SCHEMA.
Basically, the idea is to create a copy of the original query convert it to
UTF8. Character set introducers are removed and all text literals are
converted to UTF8.
This UTF8 query is intended to provide user-readable output. It must not be
used to recreate the object. Specialized SHOW CREATE statements should be
used for this.
The reason for this limitation is the following: the original query can
contain symbols from several character sets (by means of character set
introducers).
Example:
- original query:
CREATE VIEW v1 AS SELECT _cp1251 'Hello' AS c1;
- UTF8 query (for INFORMATION_SCHEMA):
CREATE VIEW v1 AS SELECT 'Hello' AS c1;
2007-06-28 19:34:54 +02:00
`character_set_client` char(32) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
`collation_connection` char(32) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
`db_collation` char(32) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
`body_utf8` longblob,
2006-05-29 10:39:45 +02:00
PRIMARY KEY (`db`,`name`)
2006-01-26 23:03:46 +01:00
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='Events'
2006-01-19 03:56:06 +01:00
show create table general_log;
Table Create Table
general_log CREATE TABLE `general_log` (
2006-02-22 10:09:59 +01:00
`event_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
2007-10-18 23:48:04 +02:00
`user_host` mediumtext NOT NULL,
`thread_id` int(11) NOT NULL,
`server_id` int(11) NOT NULL,
`command_type` varchar(64) NOT NULL,
`argument` mediumtext NOT NULL
2006-01-19 03:56:06 +01:00
) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='General log'
show create table slow_log;
Table Create Table
slow_log CREATE TABLE `slow_log` (
2006-02-22 10:09:59 +01:00
`start_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
2006-01-19 03:56:06 +01:00
`user_host` mediumtext NOT NULL,
`query_time` time NOT NULL,
`lock_time` time NOT NULL,
`rows_sent` int(11) NOT NULL,
`rows_examined` int(11) NOT NULL,
2007-10-18 23:48:04 +02:00
`db` varchar(512) NOT NULL,
`last_insert_id` int(11) NOT NULL,
`insert_id` int(11) NOT NULL,
`server_id` int(11) NOT NULL,
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`sql_text` mediumtext NOT NULL
) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log'
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show tables;
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Tables_in_test
