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TommyBALL
Mon 24th Dec '01, 5:25am
Hi!

MySQL 4.0.1 is now released.

I would like to start by saying that the MySQL 4.0.0-alpha release has
worked very well and we haven't (yet) found any really fatal bugs in
it. Our intention is to continue with development on the 4.0 series
for a couple of more weeks and then shift to work on 4.1 to let the
4.0 code quickly stabilize.

4.0.1 includes some major new features compared to 4.0.0:

- A Query cache to cache results for SELECT statements. This should
give a major speed improvement for queries on read-intensive tables.
More information can be found at:
http://www.mysql.com/doc/Q/u/Query_Cache.html

- Better and faster fulltext search.
http://www.mysql.com/doc/F/u/Fulltext_Search.html

- Extended UNION to handle braces


Here follows the ChangeLog for 4.0.1

* Fixed bug when `HANDLER' was used with some unsupported table type.

* `mysqldump' now puts `ALTER TABLE table_name DISABLE KEYS' and
`ALTER TABLE table_name DISABLE KEYS' in the sql dump.

* Added `mysql_fix_extensions' script

* Fixed stack overrun problem `LOAD DATA FROM MASTER' on OSF1.

* Fixed shutdown problem on HPUX.

* Added functions `des_encrypt()' and `des_decrypt()'.

* Added statement FLUSH DES_KEY_FILE.

* Added mysqld option `--des-key-file'.

* `HEX(string)' now returns the characters in string converted to
hexadecimal.

* Fixed problem with `GRANT' when using `lower_case_table_names ==
1'.

* Changed `SELECT ... IN SHARE MODE' to `SELECT .. LOCK IN SHARE
MODE' (as in MySQL 3.23).

* A new query cache to cache results from identical `SELECT' queries.

* Fixed core dump bug on 64 bit machines when it got a wrong
communication packet.

* `MATCH ... AGAINST(... IN BOOLEAN MODE)' can now work without
`FULLTEXT' index.

* Fixed slave to replicate from 3.23 master.

* Miscellaneous replication fixes/cleanup.

* Got shutdown to work on Mac OS X.

* Added `myisam/ft_dump' utility for low-level inspection of
`FULLTEXT' indexes.

* Fixed bug in `DELETE ... WHERE ... MATCH ...'.

* Added support for `MATCH ... AGAINST(... IN BOOLEAN MODE)'.
*Note: you have to rebuild your tables with `ALTER TABLE tablename
TYPE=MyISAM' to be able to use boolean fulltext search*.

* `LOCATE()' and `INSTR()' are case sensitive if neither argument is
a binary string.

* Changed `RND()' initialization so that `RND(N)' and `RND(N+1)' are
more distinct.

* Fixed core dump bug in `UPDATE ... ORDER BY'.

* Changed `INSERT INTO .. SELECT' to stop on errors by default.

* Ignore `DATA DIRECTORY' and `INDEX DIRECTORY' directives on
Windows.

* Added boolean fulltext search code. It should be considered early
alpha.

* Extended `MODIFY' and `CHANGE' in `ALTER TABLE' to accept the
`AFTER' keyword.

* Index are now used with `ORDER' BY on a whole InnoDB table.


All bugs and features that has been done up to 3.23.46 + some from the
upcoming 3.23.47 are also done in the 4.0.1 release.

Some of the Bug fixes from the 3.23 series, that has found it's way to
4.0:

* InnoDB now supports `NULL' in keys.

* Fixed shutdown problem on HPUX. (Introduced in 3.23.46)

* Added 'DO expression' command.

* Fixed core-dump bug in replication when using SELECT
RELEASE_LOCK();

* Added new statement DO expression,[expression].

* Added `slave-skip-errors' option

* Added statistics variables for all MySQL commands. (`SHOW STATUS'
is now much longer).

* Fixed default values for InnoDB tables.

* Fixed that `GROUP BY expr DESC' works.

* Fixed bug when using `t1 LEFT JOIN t2 ON t2.key=constant'.

* `mysql_config' now also work with binary (relocated) distributions.

* Fixed problem with aliased temporary tables replication

* InnoDB and BDB tables will now use index when doing an `ORDER BY'
on the whole table.

* Fixed bug where one got an empty set instead of a DEADLOCK error
when using BDB tables.

* One can now kill `ANALYZE',`REPAIR' and `OPTIMIZE TABLE' when the
thread is waiting to get a lock on the table.

* Fixed race condition in `ANALYZE TABLE'.

* Fixed bug when joining with caching (unlikely to happen).

* Fixed race condition when using the binary log and `INSERT DELAYED'
which could cause the binary log to have rows that was not yet
written to MyISAM tables.

* Changed caching of binary log to make replication slightly faster.

* Fixed bug in replication on Mac OS X.


Last I would like to wish everyone a Merry Christmas and a bug free
new year!

Regards,
Monty
Merry X-mas! :D

eva2000
Mon 24th Dec '01, 5:31am
oooooooooh nice... query cache yummy :)

thanks

Shaman
Mon 24th Dec '01, 2:02pm
Sounds good... but I figure I won't be touching that stuff until at least June. Unstable databases are not a wise investment in time!