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Code Activity

MDEV-8577: With enforce-storage-engine mysql_upgrade corrupts the schema:

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ALTER TABLE should either bypass enforce-storage-engine, or mysql_upgrade
should refuse to run

Allow user to alter contents of existing table without enforcing
storage engine. However, enforce storage engine on ALTER TABLE
x ENGINE=y;
This commit is contained in:
Jan Lindström
2015-09-12 13:16:05 +03:00
parent 1e9ab68e4a
commit 9b577edd50
5 changed files with 144 additions and 2 deletions
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30
mysql-test/r/enforce_storage_engine.result
View File

@ -122,3 +122,33 @@ DROP TABLE t1;
set global sql_mode=default;
SET SESSION enforce_storage_engine=NULL;
SET GLOBAL enforce_storage_engine=NULL;
CREATE TABLE t3 (c1 INT PRIMARY KEY AUTO_INCREMENT, c2 VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t3 values (NULL, 'test');
SET SESSION enforce_storage_engine=Memory;
ALTER TABLE t3 ENGINE=MyISAM;
Warnings:
Note 1266 Using storage engine MEMORY for table 't3'
SHOW CREATE TABLE t3;
Table Create Table
t3 CREATE TABLE `t3` (
`c1` int(11) NOT NULL AUTO_INCREMENT,
`c2` varchar(10) DEFAULT NULL,
PRIMARY KEY (`c1`)
) ENGINE=MEMORY AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
DROP TABLE t3;
SET SESSION enforce_storage_engine=NULL;
CREATE TABLE t3 (c1 INT PRIMARY KEY AUTO_INCREMENT, c2 VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t3 values (NULL, 'test');
SET SESSION enforce_storage_engine=Memory;
ALTER TABLE t3 ADD COLUMN c3 INT;
SHOW CREATE TABLE t3;
Table Create Table
t3 CREATE TABLE `t3` (
`c1` int(11) NOT NULL AUTO_INCREMENT,
`c2` varchar(10) DEFAULT NULL,
`c3` int(11) DEFAULT NULL,
PRIMARY KEY (`c1`)
) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
DROP TABLE t3;
SET SESSION enforce_storage_engine=NULL;
SET GLOBAL enforce_storage_engine=NULL;

60
mysql-test/r/mysql_upgrade.result
View File

@ -459,4 +459,64 @@ even_longer_user_name_number_3_to_test_the_grantor_and_definer_field_length@loca
DROP USER very_long_user_name_number_1, very_long_user_name_number_2, even_longer_user_name_number_3_to_test_the_grantor_and_definer_field_length@localhost;
DROP PROCEDURE test.pr;
set sql_mode=default;
# Droping the previously created mysql_upgrade_info file..
create table test.t1(a int) engine=MyISAM;
# Trying to enforce InnoDB for all tables
SET GLOBAL enforce_storage_engine=InnoDB;
Phase 1/6: Checking and upgrading mysql database
Processing databases
mysql
mysql.column_stats OK
mysql.columns_priv OK
mysql.db OK
mysql.event OK
mysql.func OK
mysql.gtid_slave_pos OK
mysql.help_category OK
mysql.help_keyword OK
mysql.help_relation OK
mysql.help_topic OK
mysql.host OK
mysql.index_stats OK
mysql.innodb_index_stats OK
mysql.innodb_table_stats OK
mysql.plugin OK
mysql.proc OK
mysql.procs_priv OK
mysql.proxies_priv OK
mysql.roles_mapping OK
mysql.servers OK
mysql.table_stats OK
mysql.tables_priv OK
mysql.time_zone OK
mysql.time_zone_leap_second OK
mysql.time_zone_name OK
mysql.time_zone_transition OK
mysql.time_zone_transition_type OK
mysql.user OK
Phase 2/6: Fixing views
Phase 3/6: Running 'mysql_fix_privilege_tables'
Phase 4/6: Fixing table and database names
Phase 5/6: Checking and upgrading tables
Processing databases
information_schema
mtr
mtr.global_suppressions OK
mtr.test_suppressions OK
performance_schema
test
test.t1 OK
Phase 6/6: Running 'FLUSH PRIVILEGES'
OK
# Should return 2
SELECT count(*) FROM information_schema.tables where ENGINE="InnoDB";
count(*)
2
SHOW CREATE TABLE test.t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE test.t1;
SET GLOBAL enforce_storage_engine=NULL;
End of tests

22
mysql-test/t/enforce_storage_engine.test
View File

@ -87,3 +87,25 @@ disconnect con1;
set global sql_mode=default;
SET SESSION enforce_storage_engine=NULL;
SET GLOBAL enforce_storage_engine=NULL;
#
# MDEV-8577: With enforce-storage-engine mysql_upgrade corrupts the schema:
# ALTER TABLE should either bypass enforce-storage-engine, or mysql_upgrade
# should refuse to run
#
CREATE TABLE t3 (c1 INT PRIMARY KEY AUTO_INCREMENT, c2 VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t3 values (NULL, 'test');
SET SESSION enforce_storage_engine=Memory;
ALTER TABLE t3 ENGINE=MyISAM;
SHOW CREATE TABLE t3;
DROP TABLE t3;
SET SESSION enforce_storage_engine=NULL;
CREATE TABLE t3 (c1 INT PRIMARY KEY AUTO_INCREMENT, c2 VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t3 values (NULL, 'test');
SET SESSION enforce_storage_engine=Memory;
ALTER TABLE t3 ADD COLUMN c3 INT;
SHOW CREATE TABLE t3;
DROP TABLE t3;
SET SESSION enforce_storage_engine=NULL;
SET GLOBAL enforce_storage_engine=NULL;

23
mysql-test/t/mysql_upgrade.test
View File

@ -161,4 +161,27 @@ DROP USER very_long_user_name_number_1, very_long_user_name_number_2, even_longe
DROP PROCEDURE test.pr;
set sql_mode=default;
#
# Enforce storage engine option should not effect mysql_upgrade
#
--echo # Droping the previously created mysql_upgrade_info file..
--remove_file $MYSQLD_DATADIR/mysql_upgrade_info
create table test.t1(a int) engine=MyISAM;
--echo # Trying to enforce InnoDB for all tables
SET GLOBAL enforce_storage_engine=InnoDB;
--replace_result $MYSQLTEST_VARDIR var
--exec $MYSQL_UPGRADE --force 2>&1
--echo # Should return 2
SELECT count(*) FROM information_schema.tables where ENGINE="InnoDB";
SHOW CREATE TABLE test.t1;
DROP TABLE test.t1;
# mysql_upgrade must have created mysql_upgrade_info file,
# so the following command should never fail.
--remove_file $MYSQLD_DATADIR/mysql_upgrade_info
SET GLOBAL enforce_storage_engine=NULL;
--echo End of tests

11
sql/sql_table.cc
View File

@ -9818,14 +9818,21 @@ static bool check_engine(THD *thd, const char *db_name,
DBUG_ENTER("check_engine");
handlerton **new_engine= &create_info->db_type;
handlerton *req_engine= *new_engine;
handlerton *enf_engine= thd->variables.enforced_table_plugin ?
plugin_hton(thd->variables.enforced_table_plugin) : NULL;
handlerton *enf_engine= NULL;
bool no_substitution= thd->variables.sql_mode & MODE_NO_ENGINE_SUBSTITUTION;
*new_engine= ha_checktype(thd, req_engine, no_substitution);
DBUG_ASSERT(*new_engine);
if (!*new_engine)
DBUG_RETURN(true);
/* Enforced storage engine should not be used in
ALTER TABLE that does not use explicit ENGINE = x to
avoid unwanted unrelated changes.*/
if (!(thd->lex->sql_command == SQLCOM_ALTER_TABLE &&
!(create_info->used_fields & HA_CREATE_USED_ENGINE)))
enf_engine= thd->variables.enforced_table_plugin ?
plugin_hton(thd->variables.enforced_table_plugin) : NULL;
if (enf_engine && enf_engine != *new_engine)
{
if (no_substitution)