Release 3.21.10.0

[yanhuqing666]

Release Notes:

We have released a new version 3.21.06.0.
Firstly, we must thank to the following people for their contributions to our community：@13611582598, @mwhei , @lenovore, @jmbkeyes .

Features:

• [[Improve]supports detach/attach cluster  #2866] Supports detach/attach cluster. More Detail,see doc.
• [[Improve]supports default sharding schema #2844] Supports default sharding schema[alpha version]. More Detail,see doc.
• [[Improve]flow control: add backend read water level #2845] New flow control: add backend read water level. More Detail,see doc.

Bug-fixes:

• [EPollArrayWrapper.epollWait 100% CPU #11] EPollArrayWrapper.epollWait may cause 100% CPU .
• [show @@dbInstance command, READ_LOAD and WRITE_LOAD are always displayed as 0 #2896] show @@dbInstance command, READ_LOAD and WRITE_LOAD are always displayed as 0.
• [fakeMySQLVersion does not support MariaDB 10.x #2747] fakeMySQLVersion does not support MariaDB 10.x, thanks to @lenovore for reporting the bug.
• [dble : add/truncate/dop partition not support #2750] support add/truncate/dop partition , thanks to @13611582598 for reporting the bug.
• [父子表关联，指定了父表的分片键，但为什么还路由到所有的分片？ #2611] The problem of optimizing er table, thanks to @jmbkeyes for reporting the bug.
• [三表连查结果不正确 #2828] Three tables join, the result may be wrong, thanks to @mwhei for reporting the bug.
• Sometimes complex queries may cause memory leaks.

Breaking backward compatibility:

none

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发行说明：

我们发布了新版本 3.21.10.0。
首先，我们必须感谢以下人士对我们社区的贡献：@13611582598, @mwhei , @lenovore, @jmbkeyes.

特性：

• [[Improve]supports detach/attach cluster  #2866] 支持单个dble脱离/回归集群. 更多详细信息，请参见 doc.
• [[Improve]supports default sharding schema #2844] 支持默认的分片模式 [alpha功能]。更多详细信息，请参见doc.
• [[Improve]flow control: add backend read water level #2845] 新的流量控制：添加后端读取水位。更多详细信息，请参见doc.

缺陷修复:

• [EPollArrayWrapper.epollWait 100% CPU #11] EPollArrayWrapper.epollWait 可能导致 100% CPU。
• [show @@dbInstance command, READ_LOAD and WRITE_LOAD are always displayed as 0 #2896] show @@dbInstance 命令，READ_LOAD 和 WRITE_LOAD 始终显示为 0.
• [fakeMySQLVersion does not support MariaDB 10.x #2747] fakeMySQLVersion 不支持 MariaDB 10.x，感谢@lenovore 报告此问题。
• [dble : add/truncate/dop partition not support #2750] 支持add/truncate/dop partition , 感谢@13611582598 报告此问题。
• [父子表关联，指定了父表的分片键，但为什么还路由到所有的分片？ #2611] 优化er表问题，感谢@jmbkeyes 报告错误。
• [三表连查结果不正确 #2828] 三表join，结果可能有误，感谢@mwhei 报告bug。
• 有时复杂的查询可能会导致内存泄漏。

和旧版本的不兼容项：

无

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This discussion was created from the release Release 3.21.10.0.