MySQL 5.1.11-beta, a new version of the popular Open Source Database
Management System, has been released. The Community Edition is now
available in source and binary form for a number of platforms from our
download pages at
http://dev.mysql.com/downloads/ and mirror sites.
Note that not all mirror sites may be up to date at this point in time -
if you can't find this version on some mirror, please try again later or
choose another download site.
There were some problems with the primary mirror sites when we sent the
packages to get distributed, it seems that in Asia just the mirror
servers in Taiwan have them available, and none in the Middle East.
This is a new Beta development release, fixing recently discovered
This section documents all changes and bug fixes that have been
applied since the last official MySQL release. If you would like
to receive more fine-grained and personalized update alerts about
fixes that are relevant to the version and features you use,
please consider subscribing to MySQL Network (a commercial MySQL
offering). For more details please see
Functionality added or changed:
* Incompatible change: The Event Scheduler can now be in one of
three states (on, off, or the new suspended state). In
addition, due to the fact that SET GLOBAL event_scheduler; now
acts in a synchronous rather than asynchronous manner, the
Event Scheduler thread can be no longer be activated or
deactivated at run time.
For more information regarding these changes, see Section
22.1, "Event Scheduler Overview."
* Previously, to build MySQL from source with SSL support
enabled, you would invoke configure with either the
--with-openssl or --with-yassl option. Those options both have
been replaced by the --with-ssl option. By default, --with-ssl
causes the bundled yaSSL library to be used. To select OpenSSL
instead, give the option as --with-ssl=path, where path is the
directory where the OpenSSL header files and libraries are
* Added the --ssl-verify-server-cert option to MySQL client
programs. This option causes the server's Common Name value in
its certificate to be verified against the hostname used when
connecting to the server, and the connection is rejected if
there is a mismatch. Added MYSQL_OPT_SSL_VERIFY_SERVER_CERT
option for the mysql_options() C API function to enable this
verification. This feature can be used to prevent
man-in-the-middle attacks. Verification is disabled by
default. (Bug#17208: http://bugs.mysql.com/17208)
* Added the ssl_ca, ssl_capath, ssl_cert, ssl_cipher, and
ssl_key system variables, which display the values given via
the corresponding command options. See Section 22.214.171.124, "SSL
Command Options." (Bug#19606: http://bugs.mysql.com/19606)
* NDB Cluster: The limit of 2048 ordered indexes per cluster has
been lifted. There is now no upper limit on the number of
ordered indexes (including AUTO_INCREMENT columns) that may be
used. (Bug#14509: http://bugs.mysql.com/14509)
* Added the log_queries_not_using_indexes system variable.
* Added the --angel-pid-file option to mysqlmanager for
specifying the file in which the angel process records its
process ID when mysqlmanager runs in daemon mode.
* To prevent inadvertant loss of data, ALTER TABLE can no longer
be used to change the storage engine of a table to MERGE or
BLACKHOLE. (Bug#10952: http://bugs.mysql.com/10952)
* The ENABLE KEYS and DISABLE KEYS clauses for the ALTER TABLE
statement are now supported for partitioned tables.
* It is now possible to use NEW.var_name values within triggers
as INOUT parameters to stored procedures.
* Security fix: An SQL-injection security hole has been found in
multi-byte encoding processing. The bug was in the server,
incorrectly parsing the string escaped with the
mysql_real_escape_string() C API function.
This vulnerability was discovered and reported by Josh Berkus
<josh@stripped> and Tom Lane <tgl@stripped> as part
of the inter-project security collaboration of the OSDB
consortium. For more information about SQL injection, please
see the text at the end of this announcement.
* File size specifications for InnoDB data files were case
sensitive. (Bug#19609: http://bugs.mysql.com/19609)
* InnoDB did not increment the handler_read_prev counter.
* A CREATE TABLE statement that created a table from a
materialized view did not inherit default values from the
underlying table. (Bug#19089: http://bugs.mysql.com/19089)
* NDB Cluster: mysqld processes did not always detect cluster
shutdown, leading to issues with CLuster replication and
schema distribution. (Bug#19395: http://bugs.mysql.com/19395)
* NDB Cluster: SELECT MIN(unique_column) from a Cluster table
with user-defined partitioning crashed the server.
* If there is a global read lock, CREATE DATABASE, RENAME
DATABASE, and DROP DATABASE could deadlock.
* Premature optimization of nested subqueries in the FROM clause
that refer to aggregate functions could lead to incorrect
results. (Bug#19077: http://bugs.mysql.com/19077)
* For dates with 4-digit year parts less than 200, an implicit
conversion to add a century was applied for date arithmetic
performed with DATE_ADD(), DATE_SUB(), + INTERVAL, and -
INTERVAL. (For example, DATE_ADD('0050-01-01 00:00:00',
INTERVAL 0 SECOND) became '2050-01-01 00:00:00'.) Now these
operations return NULL rather than an incorrect non-NULL
value. (Bug#18997: http://bugs.mysql.com/18997)
* BLOB or TEXT arguments to or values returned from stored
functions were not copied properly if too long and could
become garbled. (Bug#18587: http://bugs.mysql.com/18587)
* Simultaneous scheduled events whose actions conflicted with
one another could crash the server.
* In was not possible to invoke a stored routine containing
dynamic SQL from a scheduled event.
* NDB Cluster: Running ALL START in the NDB management client or
restarting multiple nodes simultaneously could under some
circumstances cause the cluster to crash.
* The result from CONV() is a string, but was not always treated
the same way as a string when converted to a real value for an
arithmetic operation. (Bug#13975: http://bugs.mysql.com/13975)
* CREATE TABLE ... SELECT ... statements that used a stored
function explicitly or implicitly (through a view) resulted in
a Table not locked error.
* Within a trigger, SET used the SQL mode of the invoking
statement, not the mode in effect at trigger creation time.
* The server no longer uses a signal handler for signal 0
because it could cause a crash on some platforms.
* The embedded server crashed with row-based replication
enabled. (Bug#18518: http://bugs.mysql.com/18518)
* Display better error message for ALTER TABLE operations that
will result in duplicate keys due to AUTO_INCREMENT
resequencing. (Bug#14573: http://bugs.mysql.com/14573)
* The Data_free column in the output of SHOW TABLE STATUS always
displayed 0 for partitioned tables.
* Adding an index to a table created using partitioning by KEY
and the MEMORY storage engine caused the server to crash.
* When creating a table using CREATE TABLE ... PARTITION BY ...
SELECT ..., the partitioning clause was ignored.
* ALTER TABLE ENGINE=... failed when used to change a MySQL
Cluster table having no explicit primary key to use a
different storage engine.
Note: As a consequence of this fix, SHOW CREATE TABLE no
longer displays auto-partitioning informaiton for NDBCluster
* NDB Cluster (NDBAPI): On big-endian platforms,
NdbOperation::write_attr() did not update 32-bit fields
correctly. (Bug#19537: http://bugs.mysql.com/19537)
* NDB Cluster: Using "stale" mysqld .FRM files could cause a
newly-restored cluster to fail. This situation could arise
when restarting a MySQL Cluster using the --intial option
while leaving connected mysqld processes running.
* NDB Cluster (Replication): Memory was not freed after some
ALTER TABLE operations, which could cause mysqld processes to
crash. (Bug#19885: http://bugs.mysql.com/19885)
* NDB Cluster (NDBAPI): The Ndb::dropEventOperation() method
failed to clean up all objects used, which could cause memory
leaks to occur. (Bug#17610: http://bugs.mysql.com/17610)
* NDB Cluster: Data node failures could cause excessive CPU
usage by ndb_mgmd. (Bug#13987: http://bugs.mysql.com/13987)
* NDB Cluster: TRUNCATE failed on tables having BLOB or TEXT
columns with the error Lock wait timeout exceeded. This
affected both in-memory and Disk Data tables.
* Revised memory allocation for local objects within stored
functions and triggers to avoid memory leak for repeated
function or trigger invocation.
* EXPLAIN ... SELECT INTO caused the client to hang.
* Symlinking .mysql_history to /dev/null to suppress statement
history saving by mysql did not work. (mysql deleted the
symlink and recreated .mysql_history as a regular file, and
then wrote history to it.)
* The basedir and tmpdir system variables could not be accessed
via @@var_name syntax. (Bug#1039: http://bugs.mysql.com/1039)
* Corrected several problems with the treatment of the
--log-error option by mysqld_safe. These problems were
manifest as differences from mysqld in error log handling.
+ If a filename was given for --log-error, mysqld_safe
ignored it and did not pass it to mysqld, which then
wrote error information to stderr and resulted in
incorrect log rotation when FLUSH LOGS was used.
+ mysql_safe now adds .err to the end of the filename if no
extension is present (the same as mysqld).
+ mysqld_safe treated a relative pathname as relative to
its own current working directory. Now it treats a
relative pathname as relative to the data directory (the
same as mysqld).
In addition, some argument quoting problems were corrected.
* Returning the value of a system variable from a stored
function caused a server crash.
* Use of uninitialized user variables in a subquery in the FROM
clause resulted in bad entries in the binary log.
* IS_USED_LOCK() could return an incorrect connection
identifier. (Bug#16501: http://bugs.mysql.com/16501)
* Concurrent reading and writing of privilege structures could
crash the server. (Bug#16372: http://bugs.mysql.com/16372)
Additional information on "SQL injection":
Discussion: An SQL-injection security hole has been found in
multi-byte encoding processing. An SQL-injection security hole
can include a situation whereby when a user supplied data to
be inserted into a database, the user might inject SQL
statements into the data that the server will execute. With
regards to this vulnerability, when character set
unaware-escaping is used (for example, addslashes() in PHP),
it is possible to bypass the escaping in some multi-byte
character sets (for example, SJIS, BIG5 and GBK). As a result,
a function such as addslashes() is not able to prevent
SQL-injection attacks. It is impossible to fix this on the
server side. The best solution is for applications to use
character set-aware escaping offered by a function such
However, a bug was detected in how the MySQL server parses the
output of mysql_real_escape_string(). As a result, even when
the character set-aware function mysql_real_escape_string()
was used, SQL injection was possible. This bug has been fixed.
Workarounds: If you are unable to upgrade MySQL to a version
that includes the fix for the bug in
mysql_real_escape_string() parsing, but run MySQL 5.0.1 or
higher, you can use the NO_BACKSLASH_ESCAPES SQL mode as a
workaround. (This mode was introduced in MySQL 5.0.1.)
NO_BACKSLASH_ESCAPES enables an SQL standard compatibility
mode, where backslash is not considered a special character.
The result will be that queries will fail.
To set this mode for the current connection, enter the
following SQL statement:
You can also set the mode globally for all clients:
SET GLOBAL sql_mode='NO_BACKSLASH_ESCAPES';
This SQL mode also can be enabled automatically when the
server starts by using the command-line option
--sql-mode=NO_BACKSLASH_ESCAPES or by setting
sql-mode=NO_BACKSLASH_ESCAPES in the server option file (for
example, my.cnf or my.ini, depending on your system).
Joerg Bruehe, Senior Production Engineer
MySQL AB, www.mysql.com
|• MySQL 5.1.11-beta has been released||Joerg Bruehe||8 Jun|