自從上個月，全球網站用戶最多，開源陣營的資料庫Mysql官方將Mysql 5列為推薦下載後，Mysql 4.0與Mysql 4.1就不再是推薦下載了。日前Mysql方面釋出了各平台的Mysql 5.0.17版本，明年還會發佈Mysql 5.0.18。另外，他們也釋出了Mysql 5.1的測試版。
我自己這邊還沒有升級，是因為有一些功能需要在調整才會相容，研究好了就會更新到Mysql 5了。據了解，Mysql 5自從Mysql方面取得了SAP的資料庫系統，改版成MaxDB後，將當中重要的一些功能，都移植強化到Mysql上，讓Mysql 5比較像個完整的資料庫了。
Mysql 5.0.17更新下載頁面
Mysql 5.0.17功能與bug更新列表
新增加的功能如下：
The original Linux RPM packages (5.0.17-0) had an issue with a zlib dependency that would result in an error during an install or upgrade. They were replaced by new binaries, 5.0.17-1.
Here is a list of the new RPM binaries:
MySQL-{Max,client,devel,server,shared,ndb*}-5.0.17-1.i386.rpm
MySQL-*-standard-5.0.17-1.rhel3.i386.rpm, MySQL-*-standard-5.0.17-1.rhel3.ia64.rpm, MySQL-*-standard-5.0.17-1.rhel3.x86_64.rpm
MySQL-*-pro-5.0.17-1.rhel3.i386.rpm, MySQL-*-pro-5.0.17-1.rhel3.ia64.rpm, MySQL-*-pro-5.0.17-1.rhel3.x86_64.rpm
MySQL-*-pro-gpl-5.0.17-1.rhel3.i386.rpm, MySQL-*-pro-gpl-5.0.17-1.rhel3.ia64.rpm, MySQL-*-pro-gpl-5.0.17-1.rhel3.x86_64.rpm
The syntax for CREATE TRIGGER now includes a DEFINER clause for specifying which access privileges to check at trigger invocation time.
Added a DEFINER column to the INFORMATION_SCHEMA.TRIGGERS table.
Invoking a stored function or trigger creates a new savepoint level. When the function or trigger finishes, the previous savepoint level is restored.
Recursion is allowed in stored procedures. Recursive stored functions and triggers still are disallowed.
In the latin5_turkish_ci collation, the order of the characters A WITH CIRCUMFLEX, I WITH CIRCUMLEX, and U WITH CIRCUMFLEX was changed. If you have used these characters in any indexed columns, you should rebuild those indexes.
