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add 5.3.1 release notes #8495

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add 5.3.1 release notes
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37 changes: 37 additions & 0 deletions releases/release-5.3.1.md
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---
title: TiDB 5.3.1 Release Notes
---

# TiDB 5.3.1 Release Notes

发版日期:2021 年 x 月 x 日
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TiDB 版本:5.3.1

## 兼容性更改
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TiDB

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TiKV

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PD
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Suggested change
PD
PD
## Bug fixes
- 修复特定情况的调度会带有不需要的 JointConsensus 步骤的问题 [#4362](https://github.com/tikv/pd/issues/4362)
- 修复对 Voter 直接进行降级的调度无法执行的问题 [#4444](https://github.com/tikv/pd/issues/4444)
- 修复更新副本同步模式配置时的数据竞争问题 [#4325](https://github.com/tikv/pd/issues/4325)
- 修复特定情况下读锁不释放的问题 [#4354](https://github.com/tikv/pd/issues/4354)
## Feature enhancements
- 改进 DR_STATE 文件内容格式 [#4341](https://github.com/tikv/pd/issues/4341)


TiDB Dashboard

TiFlash
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  • 修复 cast(arg as decimal(x,y)) 在入参 arg 大于 decimal(x,y) 表示范围时,计算结果出错的问题
  • 修复启用 max_memory_usagemax_memory_usage_for_all_queries 配置项时,TiFlash 崩溃的问题
  • 修复 cast(string ad real) 在部分场景下计算结果出错的问题
  • 修复 cast(string ad decimal) 在部分场景下计算结果出错的问题
  • 修复在修改主键列类型为一个范围更大的整型类型时,数据索引不一致的问题
  • 修复 in 表达式在形如 (arg0, arg1) in (x,y) 的多个参数的情况下计算结果出错的问题
  • 修复 MPP 查询被 kill 时,TiFlash 崩溃的问题
  • 修复 str_to_date 函数在入参以 0 开头时计算结果出错的问题
  • 修复当查询的过滤条件形如 where <string> 时,计算结果出错的问题
  • 修复 cast(string as datetime) 在入参形如 %Y-%m-%d\n%H:%i:%s 时,查询结果出错的问题


Tools

Backup & Restore (BR)

TiCDC

Dumpling

TiDB Binlog

TiDB Lightning

## 功能增强

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## Bug 修复
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1 change: 1 addition & 0 deletions releases/release-notes.md
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ TiDB 历史版本发布声明如下:

## 5.3

- [5.3.1](/releases/release-5.3.1.md)
- [5.3.0](/releases/release-5.3.0.md)

## 5.2
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1 change: 1 addition & 0 deletions releases/release-timeline.md
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Expand Up @@ -9,6 +9,7 @@ summary: 了解 TiDB 的版本发布时间线。

| 版本 | 发布日期 |
| :--- | :--- |
| [5.3.1](/releases/release-5.3.1.md) | 2022-xx-xx |
| [5.1.4](/releases/release-5.1.4.md) | 2022-02-22 |
| [5.4.0](/releases/release-5.4.0.md) | 2022-02-15 |
| [5.0.6](/releases/release-5.0.6.md) | 2021-12-31 |
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