Release 3.21.06.0

Release Notes:

We have released a new version 3.21.06.0.
Firstly, we must thank the following people for their contributions to our community：@prostranger, @LavieZhou, @lenovore, @boying52.

Features:

• [#2636] Support dynamically changing the size of the thread pool. For More Detail, see doc.
• [#2646] Support Mariadb's driver setting useBatchMultiSend. For More Detail, see mariadb doc.
• [#2751] Observe the utilization of SQL statistics queues. For More Detail, see doc.
• [#2713] Support XA transaction residue inspection. For More Detail, see doc.
• [#2408] Sharding routing cannot correctly route to the correct sharding database at "left join" and "union all", thanks to @prostranger for reporting the improvement.
• [#2130][#2676]Provides a switch that determines whether inSubquery would be transformed to join, thanks to @LavieZhou for reporting the improvement.
• [#2641] Upgrade druid to version 1.2.6.
• [#2648] Refactor cluster data. Need to re-create[backup-delete-create] the data for the upgrade.

Bug-fixes:

• [#2622] set autocommit didn't work as expected.
• [#2638] Keep slow log on, dble may occur oom.
• [#2819] The transaction fails problem when using RW-Split, thanks to @boying52 for reporting the bug.
• [#2728] Check table consistency problem, thanks to @lenovore for reporting the bug.
• Sometimes complex queries may cause thread leaks.
• When group by contains =, the result may error.
• jumpStringHash‘s default setting changed, need to reset for the upgrade.
• Some NullPointException.

Breaking backward compatibility:

• [#2676]Provides a switch that determines whether inSubquery would be transformed to join. The default value was true and now is false.
• [#2648] Refactor cluster data. Need to re-create[backup-delete-create] the data for the upgrade.
• Remove commands like file @@..., show @@syslog.
• jumpStringHash‘s default setting changed, need to reset for the upgrade.

If upgrade from the old version to this, you must know this.

---

发行说明：

我们发布了新版本 3.21.06.0。
首先，我们必须感谢以下人士对我们社区的贡献：@prostranger, @LavieZhou, @lenovore, @boying52.

特性：

• [#2636] 支持动态更改线程池大小。更多详细信息，请参见 doc。
• [#2646] 支持 Mariadb 的驱动设置 useBatchMultiSend。更多详细信息，请参阅 mariadb 文档。
• [#2751] 观察 SQL 统计队列的利用率。更多详情见doc。
• [#2713] 支持 XA 事务的残留检查。更多详细信息，请参见 doc。
• [#2408] 分片路由无法在“left join”和“union”处正确路由到正确的分片数据库，感谢@prostranger 报告改进。
• [#2130][#2676] 提供了一个开关，决定是否将 inSubquery 转换为 join，感谢@LavieZhou 报告改进。
• [#2641] 将druid升级到 1.2.6 版。
• [#2648] 重构集群数据。如果升级需要重新创建[备份-删除-创建]数据

缺陷修复:

• [#2622] set autocommit 没有按预期工作。
• [#2638] 开着慢日志，dble可能会出现oom。
• [#2819] 使用读写分离时的事务失败问题，感谢 @boying52 报告错误。
• [#2728] 检查表一致性问题，感谢@lenovore 报告错误。
• 有时复杂的查询可能会导致线程泄漏。
• 当 group by 包含 = 时，结果可能会出错。
• jumpStringHash 的默认设置已更改,升级需要重新设置。
• 一些 NullPointException。

和旧版本的不兼容项：

• [#2676] 提供一个开关，用于确定是否将 inSubquery 转换为 join。默认行为曾经为 true，现在为 false。
• [#2648] 重构集群数据。如果升级需要重新创建[备份-删除-创建]数据。
• 删除诸如file @@...、show @@syslog 之类的命令。
• jumpStringHash 的默认设置已更改，如果升级需要重置。

如果您从旧版本升级升级到本版本，您应该先阅读版本变更的内容.

Release 3.21.02.2

Release Notes:

We have released a bug-fixed version 3.21.02.2.

Bug-fixes:

• Complicated query may lead to threads leak.
• Open the slow log, dble may appear oom.
• Check table consistency problem.
• The order of com_stmt_prepare returned message is wrong in read-write separation.
• set autocommit did not perform as expected.
• Occasionally ArrayIndexOutOfBoundException.
• fix sql statistics problem.
• The transcation fail problem when using RW-Split.

发行说明：

我们发布了3.21.02.2,这是个基于3.21.02.1的bug修复版本

问题修复:

• 复杂查询可能导致的线程泄漏
• 开着慢日志，dble可能会出现oom。
• 检查表一致性问题
• 读写分离中com_stmt_prepare 返回报文次序错误
• set autocommit 未按照预期执行
• 偶现的ArrayIndexOutOfBoundException
• sql统计相关修复
• 使用读写分离时的事务失败问题

Release 3.20.10.5

Release Notes:

We have released a bug-fixed version 3.20.10.5.

Bug-fixes:

• Complicated query may lead to threads leak.
• Open the slow log, dble may appear oom.
• Check table consistency problem.
• The order of com_stmt_prepare returned message is wrong in read-write separation.
• set autocommit did not perform as expected
• Occasionally ArrayIndexOutOfBoundException

发行说明：

我们发布了3.20.10.5,这是个基于3.20.10.2的bug修复版本

问题修复:

• 复杂查询可能导致的线程泄漏
• 开着慢日志，dble可能会出现oom。
• 检查表一致性问题
• 读写分离中com_stmt_prepare 返回报文次序错误
• set autocommit 未按照预期执行
• 偶现的ArrayIndexOutOfBoundException

Release 3.20.07.5

Release Notes:

We have released a bug-fixed version 3.20.07.5.

Bug-fixes:

• Multi-statement packs out of order when lastInsertId is too large.
• Complicated query may lead to threads leak.
• Open the slow log, dble may appear oom.

发行说明：

我们发布了3.20.07.5,这是个基于3.20.07.3的bug修复版本

问题修复:

• 多语句在 lastInsertId 过大的时候包乱序
• 复杂查询可能导致的线程泄漏
• 开着慢日志，dble可能会出现oom。

Release 3.21.02.1

Release Notes:

We have released a bug-fixed version 3.21.02.1.

Bug-fixes:

• Com_stmt_prepare returns the wrong message sequence when use R-W split
• Other bugs of prepared statement
• Bug of sql_statistic
• Bug of set autocommit
• dble_db_group should support 0~3 for field rw_split_mode
• [#2638] Keep slow log on & hint, dble may occur oom
• Other incidental bugs

发行说明：

我们发布了3.21.02.1,这是个基于3.21.02.0的bug修复版本

问题修复:

• 读写分离中com_stmt_prepare 返回报文次序错误
• 其他prepare statement的bugs
• sql_statistic 的bug
• set autocommit的bug
• dble_db_group表 应支持insert rw_split_mode字段范围是0-3
• [#2638]开启慢日志并发送大量hint，可能会导致内存泄漏最终oom Keep slow log on & hint, dble may occur oom
• 一些偶发bug

Release 3.20.10.3

Release Notes:

We have released a bug-fixed version 3.20.10.3.

Bug-fixes:

• Com_stmt_prepare returns the wrong message sequence when use R-W split
• Bug of set autocommit
• [#2638] Keep slow log on & hint, dble may occur oom
• Other incidental defects

发行说明：

我们发布了3.20.10.3,这是个基于3.20.10.2的bug修复版本

问题修复:

• 读写分离中com_stmt_prepare 返回报文次序错误
• set autocommit的bug
• [#2638]开启慢日志并发送大量hint，可能会导致内存泄漏最终oom Keep slow log on & hint, dble may occur oom
• 一些偶发bug

Release 3.21.02.0

Release Notes:

We have released a new version 3.21.02.0.

Firstly, we must thanks to the following people for their contributions to our community：@evangoe, @Neil-Zhou, @314926481, @ClippedWings-renzy .

Features:

• [#2409] Support the general log. More Detail,see general log.
• [#2428] Support some sql statistics. More Detail,see sql statistic manager and tables.
• [#2387] Support server-side cursor. More Detail,see 4.4.3 Dble Flow.
• [#2503] Add an new rwSplitMode. More Detail,see rwSplitMode.
• [#2386] Support JSON mode configuration for internal. If upgrade from the old version, you should know this.
• [#1830]Suport show and resume other dble paused dataNode in cluster.
• [#2351] Provide "show dble_processlist" in server port
• [#2595] Support batch mode for load data . More Detail,see load data batch mode.
• [#2594] Upgrude druid to version 1.2.3

Bug-fixes:

• [#1843] In the same datahost, disable readHost first, then disable writeHost, report ERROR message, but disable is successful.
• [#2497] SlowQueryLog create ArrayIndexOutOfBoundsException and other problems, thanks to @evangoe for reporting the bug.
• [#2377]Can't use both show @@processlist and RwSplitService.
• [#2199]and ... or statement running error.
• [#2152] When the column after 'where' does not specify the table name，it will be routed to all nodes
• [#2342]shardingNode should be unique in the table config
• [#2366] Remove useless "/" in the error message when reloading config failed.
• [#2105][#2389] Using Navicat to connect the library can not display the table, thanks to @314926481 and @Neil-Zhou for reporting the bug.
• [#2034] Occur error "Union field merge error, field not found:W.SCANNUM" , thanks to @314926481 and @ClippedWings-renzy for reporting the bug.
• [#2324] Show which file causes the error in dry-run.

Breaking backward compatibility:

• [#2386] Support JSON mode configuration for dble internal.
• [#2598] homePath must to be configured in bootstrap.cnf.

If upgrade from the old version to this, you must know this.

---

发行说明：

我们发布了新版本 3.21.02.0。

首先，我们必须感谢以下人士对我们社区的贡献：@evangoe, @Neil-Zhou, @314926481, @ClippedWings-renzy .

特性：

• [#2409] 支持general log. 使用详情请见general log.
• [#2428] 支持一些sql统计信息. 更多详细信息，请参见sql statistic manager 和tables.
• [#2387] 支持服务器端游标。更多详细信息，请参见4.4.3 Dble Flow.
• [#2503] 添加新的rwSplitMode。更多详细信息，请参见rwSplitMode.
• [#2386] 支持dble内部的JSON模式配置。如果是从旧版本升级，您应该知道升级注意.
• [#1830] 支持展示并恢复群集中其他已暂停的dataNode。
• [#2351] Provide "show dble_processlist" in server port
• [#2595] 支持load data批处理。更多详细信息，请参见load data批处理模式.
• [#2594] 将druid升级至1.2.3版

缺陷修复:

• [#1843] 在同一数据主机中，先禁用readHost，然后禁用writeHost，报告ERROR消息，但实际禁用成功。
• [#2497] 慢查询日志的ArrayIndexOutOfBoundsException和其他问题，这要感谢@evangoe报告了该错误。
• [#2377] 不能同时使用show @@ processlist和RwSplitService。
• [#2199] and ... or statement 运行错误。
• [#2152] 如果“ where”之后的列未指定表名，它将被路由到所有节点。
• [#2342] shardingNode 在表配置中应该是唯一的。
• [#2366] 重新加载配置失败时，在错误消息中删除无用的“ /”。
• [#2105][#2389] 使用Navicat连接库无法显示表，感谢@314926481和@Neil-Zhou报告了该错误。
• [#2034] 发生错误"Union field merge error, field not found:W.SCANNUM", 感谢 @ClippedWings-renzy 报告了该错误。
• [#2324] 显示哪个文件导致dry-run出错了。

打破向后兼容性：

• [#2386] 支持内部的JSON模式配置。
• [#2598] homePath 必须在bootstrap.cnf中进行显示配置。

如果您从旧版本升级升级到本版本，您应该先阅读版本变更的内容.

Release 3.20.10.2

Release Notes:

We have released a bug-fixed version 3.20.10.2.

Bug-fixes:

• Some connection pool bugs
• Some alert errors
• For select...for update, route to master but not a slave to avoid Permission Problem
• DDL error when not create dbgroup
• upgrade ZooKeeper to version 3.4.12

发行说明：

我们发布了3.20.10.2,这是个基于3.20.10.1的bug修复版本

问题修复:

• 修复一些连接池参数的错误
• 修复一些告警错误
• 对于select...for update，由于权限问题，需要路由到主而不是从
• 未建dbgroup时候执行ddl可能的错误
• ZooKeeper升级到3.4.12

Release 3.20.07.3

Release Notes:

We have released a bug-fixed version 3.20.07.3.

Bug-fixes:

• Some connection pool bugs
• Some alert errors
• For select...for update, route to master but not a slave to avoid Permission Problem
• DDL error when not create dbgroup

发行说明：

我们发布了3.20.07.3,这是个基于3.20.07.2的bug修复版本

问题修复:

• 修复一些连接池参数的错误
• 修复一些告警错误
• 对于select...for update，由于权限问题，需要路由到主而不是从
• 未建dbgroup时候执行ddl可能的错误

Release 3.20.10.1

We have released a bug-fixed version 3.20.10.1.

Release Notes:

Bug-fixes:

• When the client_found_rows capability flag requested by the client is inconsistent with the dble configuration, you will fail to log in.
• The SQL after the second begin will be implicitly committed
• Connection pool parameters testOnCreate, testOnReturn, testWhileIdle are invalid
• A field named STATE needs to be added to the backend_connections table to display the status of the connection, equivalent to show @@backend

我们发布了3.20.10.1,这是个基于3.20.10.0的bug修复版本

发行说明：

问题修复:

• 当客户端请求时的client_found_rows权能标志与dble配置不一致时，无法登录8066端口的问题
• 执行第二次begin后的sql存在隐式提交
• 连接池testOnCreate,testOnReturn，testWhileIdle参数无效的问题
• backend_connections表中需增加一个等同show @@backend中一个STATE字段，显示连接 的状态