Change since version 5.0.41:
- Functionality added or changed:
- A new status variable, Com_call_procedure, indicates the number of calls
to stored procedures. (Bug#27994)
- NDB Cluster: The server source tree now includes scripts to simplify
building MySQL with SCI support. For more information about SCI
interconnects and these build scripts, see Section 15.9.1,
Configuring MySQL Cluster to use SCI Sockets. (Bug#25470)
- Prior to this release, when DATE values were compared with DATETIME values
the time portion of the DATETIME value was ignored. Now a DATE value is
coerced to the DATETIME type by adding the time portion as 00:00:00. To
mimic the old behavior use the CAST() function in the following way:
SELECT date_field = CAST(NOW() as DATE);. (Bug#28929)
- A large number of bugs including these security problems have been fixed:
- A malformed password packet in the
connection protocol could cause the server to crash. Thanks for Dormando
for reporting this bug and providing details and a proof of concept.
(Bug#28984)
- CREATE TABLE LIKE did not require any privileges on the source table. Now
it requires the SELECT privilege. (Bug#25578)
- In addition, CREATE TABLE LIKE was not isolated from alteration by other
connections, which resulted in various errors and incorrect binary log
order when trying to execute concurrently a CREATE TABLE LIKE statement
and either DDL statements on the source table or DML or DDL statements on
the target table. (Bug#23667)
* Added the SHOW PROFILES and SHOW PROFILE statements to display statement
profile data, and the accompanying INFORMATION_SCHEMA.PROFILING table.
* Added the Uptime_since_flush_status status variable, which indicates the
number of seconds since the most recent FLUSH STATUS statement.
* Incompatible change in DATE_FORMAT().
* NDB Cluster: The LockPagesInMainMemory configuration parameter has changed
its type and possible values.
* The bundled yaSSL library was upgraded to version 1.5.8.
* The --skip-thread-priority option now is enabled by default for binary Mac
OS X distributions. Use of thread priorities degrades performance on Mac OS X.
* Added the --disable-grant-options option to configure.
* Bug fixes.
Changes since version 5.0.22:
- Security fix: If a user has access to MyISAM table t, that user can
create a MERGE table m that accesses t. However, if the user's
privileges on t are subsequently revoked, the user can continue to
access t by doing so through m. If this behavior is undesirable, you
can start the server with the new --skip-merge option to disable the
MERGE storage engine. (Bug#15195)
- In the INFORMATION_SCHEMA.ROUTINES table the ROUTINE_DEFINITION
column now is defined as NULL rather than NOT NULL. Also, NULL rather
than the empty string is returned as the column value if the user does
not have sufficient privileges to see the routine
definition. (Bug#20230)
- Several other bug fixes
Full listing of changes:
http://dev.mysql.com/doc/refman/5.0/en/news-5-0-21.html
Notable changes include:
- Security enhancement: Added the global max_prepared_stmt_count system
variable to limit the total number of prepared statements in the
server.
- The default for the innodb_thread_concurrency system variable was
changed to 8.
- Fixes for CVE-2006-1516, CVE-2006-1517 and CVE-2006-1518.
And a lot of bug fixes.
MySQL is a SQL (Structured Query Language) database server. SQL is the
most popular database language in the world. MySQL is a client-server
implementation that consists of a server daemon `mysqld' and many
different client programs/libraries.
The main goals of MySQL are speed and robustness.
The base upon which MySQL is built is a set of routines that have been
used in a highly demanding production environment for many years. While
MySQL is still in development it already offers a rich and highly useful
function set.
The official way to pronounce 'MySQL' is 'My Ess Que Ell' (Not MY-SEQUEL).
This package contains the MySQL client programs and libraries.
