Chris Schreiber
Mon 15th Oct '01, 11:20pm
Hi!
MySQL 4.0.0-alpha is now available at:
http://www.mysql.com/downloads/mysql-4.0.html
You can find information about upgrading from MySQL 3.23 to 4.0 at:
http://www.mysql.com/doc/U/p/Upgrading-from-3.23.html
The MySQL 4.0 release includes a lot of new exciting features, like
MySQL as an embedded library, InnoDB (transactions) as standard table
type, UNION, multi table delete and much more.
MySQL 4.0 is basically a 'reconstruction release' that will enable us to
easier add new features to MySQL in the future. The intention is to
quickly add features list at:
http://www.mysql.com/doc/T/O/TODO_MySQL_4.0.html
and then start to work on the 4.1 branch while 4.0 stabilizes.
Changes in release 4.0.0
------------------------
* Added documentation for `libmysqld', the embedded MySQL server
library. Also added example programs (a `mysql' client and
`mysqltest' test program) which use `libmysqld'.
* Removed all Gemini hooks from MySQL.
* Removed `my_thread_init()' and `my_thread_end()' from mysql_com.h,
and added `mysql_thread_init()' and `mysql_thread_end()' to
mysql.h.
* Secure connections (with SSL).
* Unsigned `BIGINT' constants now work. `MIN()' and `MAX()' now
handles signed and unsigned `BIGINT' numbers correctly.
* New character set `latin_de' which provides correct German sorting.
* `TRUNCATE TABLE' and `DELETE FROM table_name' are now separate
functions. One bonus is that `DELETE FROM table_name' now returns
the number of deleted rows.
* `DROP DATABASE' now executes a `DROP TABLE' on all tables in the
database, which fixes a problem with InnoDB tables.
* Added support for `UNION'.
* A new `HANDLER' interface to `MyISAM' tables.
* Added support for `INSERT' on `MERGE' tables. Patch from Benjamin
Pflugmann.
* Changed `WEEK(#,0)' to match the calender in the USA.
* `COUNT(DISTINCT)' is about 30% faster.
* Speed up all internal list handling.
* Speed up `IS NULL()' and some other internal primitives.
* Creating full text indexes are now much faster.
* Tree-like cache to speed up bulk inserts and
`myisam_bulk_insert_tree_size' variable.
* Searching on packed (`CHAR'/`VARCHAR') keys are now much faster.
* Optimized queries of type: `SELECT DISTINCT * from table_name
ORDER by key_part1 LIMIT #'
* `SHOW CREATE TABLE' now shows all table attributes.
* `ORDER BY ... DESC' can now use keys.
* `LOAD DATA FROM MASTER' "auto-magically" sets up a slave.
* Renamed `safe_mysqld' to `mysqld_safe'.
* Added support for symbolic links to `MyISAM' tables. Symlink
handling is now enabled by default for Windows.
* `LOAD DATA FROM MASTER' "auto-magically" sets up a slave.
* Added `SQL_CALC_FOUND_ROWS' and `FOUND_ROWS()'. This makes it
possible to know how many rows a query would have returned without
a `LIMIT' clause.
* Changed output format of `SHOW OPEN TABLES'.
* Allow `SELECT expression LIMIT ...'.
* Added `IDENTITY' as a synonym for `AUTO_INCREMENT' (like Sybase).
* Added `ORDER BY' syntax to `UPDATE' and `DELETE'.
* `SHOW INDEXES' is now a synonym for `SHOW INDEX'.
* Added `ALTER TABLE table_name DISABLE KEYS' and `ALTER TABLE
table_name ENABLE KEYS' commands.
* Allow one to use `IN' instead of `FROM' in `SHOW' commands.
* Allow ANSI SQL syntax `X'hexadecimal-number''
* Cleaned up global lock handling for `FLUSH TABLES WITH READ LOCK'
* Fixed problem with `DATETIME = constant' in `WHERE' optimization.
* Added options `--master-data' and `--no-autocommit' to `mysqldump'
(Thanks to Brian Aker for this).
* Added script `mysql_explain_log.sh' to distribution. (Thanks to
mobile.de).
MySQL 4.0.0-alpha is now available at:
http://www.mysql.com/downloads/mysql-4.0.html
You can find information about upgrading from MySQL 3.23 to 4.0 at:
http://www.mysql.com/doc/U/p/Upgrading-from-3.23.html
The MySQL 4.0 release includes a lot of new exciting features, like
MySQL as an embedded library, InnoDB (transactions) as standard table
type, UNION, multi table delete and much more.
MySQL 4.0 is basically a 'reconstruction release' that will enable us to
easier add new features to MySQL in the future. The intention is to
quickly add features list at:
http://www.mysql.com/doc/T/O/TODO_MySQL_4.0.html
and then start to work on the 4.1 branch while 4.0 stabilizes.
Changes in release 4.0.0
------------------------
* Added documentation for `libmysqld', the embedded MySQL server
library. Also added example programs (a `mysql' client and
`mysqltest' test program) which use `libmysqld'.
* Removed all Gemini hooks from MySQL.
* Removed `my_thread_init()' and `my_thread_end()' from mysql_com.h,
and added `mysql_thread_init()' and `mysql_thread_end()' to
mysql.h.
* Secure connections (with SSL).
* Unsigned `BIGINT' constants now work. `MIN()' and `MAX()' now
handles signed and unsigned `BIGINT' numbers correctly.
* New character set `latin_de' which provides correct German sorting.
* `TRUNCATE TABLE' and `DELETE FROM table_name' are now separate
functions. One bonus is that `DELETE FROM table_name' now returns
the number of deleted rows.
* `DROP DATABASE' now executes a `DROP TABLE' on all tables in the
database, which fixes a problem with InnoDB tables.
* Added support for `UNION'.
* A new `HANDLER' interface to `MyISAM' tables.
* Added support for `INSERT' on `MERGE' tables. Patch from Benjamin
Pflugmann.
* Changed `WEEK(#,0)' to match the calender in the USA.
* `COUNT(DISTINCT)' is about 30% faster.
* Speed up all internal list handling.
* Speed up `IS NULL()' and some other internal primitives.
* Creating full text indexes are now much faster.
* Tree-like cache to speed up bulk inserts and
`myisam_bulk_insert_tree_size' variable.
* Searching on packed (`CHAR'/`VARCHAR') keys are now much faster.
* Optimized queries of type: `SELECT DISTINCT * from table_name
ORDER by key_part1 LIMIT #'
* `SHOW CREATE TABLE' now shows all table attributes.
* `ORDER BY ... DESC' can now use keys.
* `LOAD DATA FROM MASTER' "auto-magically" sets up a slave.
* Renamed `safe_mysqld' to `mysqld_safe'.
* Added support for symbolic links to `MyISAM' tables. Symlink
handling is now enabled by default for Windows.
* `LOAD DATA FROM MASTER' "auto-magically" sets up a slave.
* Added `SQL_CALC_FOUND_ROWS' and `FOUND_ROWS()'. This makes it
possible to know how many rows a query would have returned without
a `LIMIT' clause.
* Changed output format of `SHOW OPEN TABLES'.
* Allow `SELECT expression LIMIT ...'.
* Added `IDENTITY' as a synonym for `AUTO_INCREMENT' (like Sybase).
* Added `ORDER BY' syntax to `UPDATE' and `DELETE'.
* `SHOW INDEXES' is now a synonym for `SHOW INDEX'.
* Added `ALTER TABLE table_name DISABLE KEYS' and `ALTER TABLE
table_name ENABLE KEYS' commands.
* Allow one to use `IN' instead of `FROM' in `SHOW' commands.
* Allow ANSI SQL syntax `X'hexadecimal-number''
* Cleaned up global lock handling for `FLUSH TABLES WITH READ LOCK'
* Fixed problem with `DATETIME = constant' in `WHERE' optimization.
* Added options `--master-data' and `--no-autocommit' to `mysqldump'
(Thanks to Brian Aker for this).
* Added script `mysql_explain_log.sh' to distribution. (Thanks to
mobile.de).