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add release notes for 7.5.3 #18078

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merged 36 commits into from
Aug 5, 2024
Merged

add release notes for 7.5.3 #18078

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12fa8cd
add release notes for 7.5.3
Oreoxmt Jul 23, 2024
1b9867d
remove duplicate note
Oreoxmt Jul 23, 2024
5aebbcd
add TiFlash
Oreoxmt Jul 23, 2024
698f656
move TiCDC bug fixes from improvements section to bug fix
Oreoxmt Jul 23, 2024
9b38d3a
add INFORMATION_SCHEMA.KEYWORDS
Oreoxmt Jul 23, 2024
ad45258
add TiFlash and TiDB/execution
Oreoxmt Jul 23, 2024
ffb166c
move TiFlash bug from improvements section to bug fix
Oreoxmt Jul 23, 2024
f06bf84
add BR
Oreoxmt Jul 24, 2024
75228d5
add TiDB bug fixes
Oreoxmt Jul 24, 2024
daef2cc
add TiKV
Oreoxmt Jul 24, 2024
11da27a
add TiDB sql-infra
Oreoxmt Jul 24, 2024
0618abf
remove duplicate note
Oreoxmt Jul 24, 2024
03b7c41
add a dup note for BR
Oreoxmt Jul 25, 2024
031cc2c
add PD
Oreoxmt Jul 25, 2024
8933387
remove empty notes and add comments
Oreoxmt Jul 25, 2024
a8625fa
update TiKV, TiFlash, BR, and TiCDC parts
Oreoxmt Jul 26, 2024
bd9c365
Update releases/release-7.5.3.md
qiancai Jul 29, 2024
f6790c5
add bug fix > timestampadd
Oreoxmt Jul 29, 2024
9f511cd
refine descriptions for PD bug fixes
qiancai Jul 29, 2024
4915c0d
Improve descriptions to make them clear
lilin90 Jul 29, 2024
aad9fc8
Update wording
lilin90 Jul 29, 2024
6170884
Update format
lilin90 Jul 29, 2024
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Update releases/release-7.5.3.md
hfxsd Jul 29, 2024
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Update releases/release-7.5.3.md
hfxsd Jul 29, 2024
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Apply suggestions from code review
qiancai Jul 29, 2024
f6d3306
Update three bug fixes
lilin90 Jul 30, 2024
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Update releases/release-7.5.3.md
lilin90 Jul 30, 2024
d5b021d
Update wording
lilin90 Jul 30, 2024
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update comments
Oreoxmt Jul 30, 2024
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Apply suggestions from code review
qiancai Jul 30, 2024
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Oreoxmt Jul 30, 2024
fa28243
remove dup prefix and empty notes
Oreoxmt Jul 31, 2024
2a4c8ba
Merge branch 'master' into v7.5.3
Oreoxmt Jul 31, 2024
3fc23ee
Update wording
lilin90 Jul 31, 2024
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Oreoxmt Aug 1, 2024
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update release date from 20240731 to 20240805
Oreoxmt Aug 2, 2024
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172 changes: 172 additions & 0 deletions releases/release-7.5.3.md
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---
title: TiDB 7.5.3 Release Notes
summary: 了解 TiDB 7.5.3 版本的兼容性变更、改进提升，以及错误修复。
---

# TiDB 7.5.3 Release Notes

发版日期：2024 年 x 月 x 日

TiDB 版本：7.5.3

试用链接：[快速体验](https://docs.pingcap.com/zh/tidb/v7.5/quick-start-with-tidb) | [生产部署](https://docs.pingcap.com/zh/tidb/v7.5/production-deployment-using-tiup) | [下载离线包](https://cn.pingcap.com/product-community/?version=v7.5.3#version-list)

## 兼容性变更

- note [#issue](https://github.com/pingcap/${repo-name}/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
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- (dup): release-7.1.4.md > 兼容性变更 - 为减少日志打印的开销，TiFlash 配置项 `logger.level` 默认值由 `"debug"` 改为 `"info"` [#8641](https://github.com/pingcap/tiflash/issues/8641) @[JaySon-Huang](https://github.com/JaySon-Huang)
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## 改进提升

+ TiDB

- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
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- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-8.2.0.md > 改进提升> TiDB - 通过批量删除 TiFlash placement rule 的方式，提升对分区表执行 `TRUNCATE`、`DROP` 后数据 GC 的处理速度 [#54068](https://github.com/pingcap/tidb/issues/54068) @[Lloyd-Pottiger](https://github.com/Lloyd-Pottiger)

+ TiKV

- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

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+ PD

- note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
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+ TiFlash

- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-8.1.0.md > 改进提升> TiFlash - 降低 TiFlash 在开启 TLS 后因更新证书而导致 panic 的概率 [#8535](https://github.com/pingcap/tiflash/issues/8535) @[windtalker](https://github.com/windtalker)
- (dup): release-8.2.0.md > 改进提升> TiFlash - 减少数据高并发读取下的锁冲突，优化短查询性能 [#9125](https://github.com/pingcap/tiflash/issues/9125) @[JinheLin](https://github.com/JinheLin)

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+ Tools

+ Backup & Restore (BR)

- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-8.2.0.md > 改进提升> Tools> Backup & Restore (BR) - 去掉除了 `br log restore` 子命令之外其它 `br log` 子命令对 TiDB `domain` 数据结构的载入，降低内存消耗 [#52088](https://github.com/pingcap/tidb/issues/52088) @[Leavrth](https://github.com/Leavrth)
- (dup): release-6.5.9.md > 改进提升> Tools> Backup & Restore (BR) - 在遇到较大的 checkpoint lag 时，日志备份支持自动放弃任务，以避免日志备份长时间阻塞 GC，从而防止集群出现问题 [#50803](https://github.com/pingcap/tidb/issues/50803) @[RidRisR](https://github.com/RidRisR)
- (dup): release-6.5.10.md > 改进提升> Tools> Backup & Restore (BR) - 增加由于 DNS 错误而导致的失败的重试次数 [#53029](https://github.com/pingcap/tidb/issues/53029) @[YuJuncen](https://github.com/YuJuncen)
- (dup): release-8.1.0.md > 改进提升> Tools> Backup & Restore (BR) - 增加 PITR 集成测试用例，覆盖对日志备份与添加索引加速功能的兼容性测试 [#51987](https://github.com/pingcap/tidb/issues/51987) @[Leavrth](https://github.com/Leavrth)
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+ TiCDC

- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
Oreoxmt marked this conversation as resolved.
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- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-6.5.10.md > 改进提升> Tools> TiCDC - 支持当下游为消息队列 (Message Queue, MQ) 或存储服务时直接输出原始事件 [#11211](https://github.com/pingcap/tiflow/issues/11211) @[CharlesCheung96](https://github.com/CharlesCheung96)

+ TiDB Data Migration (DM)

- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ TiDB Lightning

- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ Dumpling

- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ TiUP

- note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ TiDB Binlog

- note [#issue](https://github.com/pingcap/tidb-binlog/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb-binlog/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

## 错误修复

+ TiDB

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- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
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- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-6.5.10.md > 错误修复> TiDB - 修复并发执行 `CREATE OR REPLACE VIEW` 可能报错 `table doesn't exist` 的问题 [#53673](https://github.com/pingcap/tidb/issues/53673) @[tangenta](https://github.com/tangenta)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复在包含数据修改操作的事务中查询带有虚拟列的表时，查询结果可能错误的问题 [#53951](https://github.com/pingcap/tidb/issues/53951) @[qw4990](https://github.com/qw4990)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复执行 `SELECT DISTINCT CAST(col AS DECIMAL), CAST(col AS SIGNED) FROM ...` 查询时结果出错的问题 [#53726](https://github.com/pingcap/tidb/issues/53726) @[hawkingrei](https://github.com/hawkingrei)
- (dup): release-6.5.10.md > 错误修复> TiDB - 修复使用 Optimizer Hints 时，可能输出错误的 WARNINGS 信息的问题 [#53767](https://github.com/pingcap/tidb/issues/53767) @[hawkingrei](https://github.com/hawkingrei)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复某些情况下可以创建非法的 `DECIMAL(0,0)` 列类型的问题 [#53779](https://github.com/pingcap/tidb/issues/53779) @[tangenta](https://github.com/tangenta)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复 `memory_quota` Hint 在子查询中可能不生效的问题 [#53834](https://github.com/pingcap/tidb/issues/53834) @[qw4990](https://github.com/qw4990)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复 JSON 相关函数在某些情况下报错信息与 MySQL 不一致的问题 [#53799](https://github.com/pingcap/tidb/issues/53799) @[dveeden](https://github.com/dveeden)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复在某些情况下，元数据锁使用不当可能导致使用 plan cache 时写入异常数据的问题 [#53634](https://github.com/pingcap/tidb/issues/53634) @[zimulala](https://github.com/zimulala)
- (dup): release-6.5.10.md > 错误修复> TiDB - 修复查询中的某些过滤条件可能导致 planner 模块发生 `invalid memory address or nil pointer dereference` 报错的问题 [#53582](https://github.com/pingcap/tidb/issues/53582) [#53580](https://github.com/pingcap/tidb/issues/53580) [#53594](https://github.com/pingcap/tidb/issues/53594) [#53603](https://github.com/pingcap/tidb/issues/53603) @[YangKeao](https://github.com/YangKeao)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复在事务内的语句被 OOM 终止之后，如果在当前事务内继续执行下一条语句，可能报错 `Trying to start aggressive locking while it's already started` 并发生 panic 的问题 [#53540](https://github.com/pingcap/tidb/issues/53540) @[MyonKeminta](https://github.com/MyonKeminta)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复执行 `ALTER TABLE ... REMOVE PARTITIONING` 后可能导致数据丢失的问题 [#53385](https://github.com/pingcap/tidb/issues/53385) @[mjonss](https://github.com/mjonss)
- (dup): release-6.5.10.md > 错误修复> TiDB - 修复使用 `PREPARE`/`EXECUTE` 方式执行带 `CONV` 表达式的语句，且 `CONV` 表达式包含 `?` 参数时，多次执行可能导致查询结果错误的问题 [#53505](https://github.com/pingcap/tidb/issues/53505) @[qw4990](https://github.com/qw4990)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复使用 `auth_socket` 认证插件时，TiDB 在某些情况下未能拒绝不符合身份认证的用户连接的问题 [#54031](https://github.com/pingcap/tidb/issues/54031) @[lcwangchao](https://github.com/lcwangchao)
- (dup): release-6.5.10.md > 错误修复> TiDB - 修复 information schema 缓存未命中导致 stale read 查询延迟上升的问题 [#53428](https://github.com/pingcap/tidb/issues/53428) @[crazycs520](https://github.com/crazycs520)
- (dup): release-6.5.10.md > 错误修复> TiDB - 修复 `INFORMATION_SCHEMA.TIDB_TRX` 表中 `STATE` 字段的 `size` 未定义导致 `STATE` 显示为空的问题 [#53026](https://github.com/pingcap/tidb/issues/53026) @[cfzjywxk](https://github.com/cfzjywxk)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复在自动收集统计信息时，系统变量 `tidb_enable_async_merge_global_stats` 和 `tidb_analyze_partition_concurrency` 未生效的问题 [#53972](https://github.com/pingcap/tidb/issues/53972) @[hi-rustin](https://github.com/hi-rustin)
- (dup): release-8.2.0.md > 错误修复> TiDB - 修复使用 `CURRENT_DATE()` 作为列默认值时查询结果错误的问题 [#53746](https://github.com/pingcap/tidb/issues/53746) @[tangenta](https://github.com/tangenta)

+ TiKV

- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-8.2.0.md > 错误修复> TiKV - 修复设置 gRPC 消息的压缩算法 (`grpc-compression-type`) 对 TiKV 发送到 TiDB 的消息不起作用的问题 [#17176](https://github.com/tikv/tikv/issues/17176) @[ekexium](https://github.com/ekexium)
- (dup): release-8.2.0.md > 错误修复> TiKV - 修复高并发的 Coprocessor 请求可能导致 TiKV OOM 的问题 [#16653](https://github.com/tikv/tikv/issues/16653) @[overvenus](https://github.com/overvenus)
- (dup): release-8.2.0.md > 错误修复> TiKV - 修复 `advance-ts-interval` 配置未被用于限制 CDC 和 log-backup 模块中 `check_leader` 操作的 timeout，导致在某些情况下 TiKV 正常重启时 `resolved_ts` lag 过大的问题 [#17107](https://github.com/tikv/tikv/issues/17107) @[MyonKeminta](https://github.com/MyonKeminta)

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+ PD

- note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-7.1.4.md > 错误修复> PD - 修复资源组 (Resource Group) 客户端中未完全删除的 slot 导致分配 token 低于给定值的问题 [#7346](https://github.com/tikv/pd/issues/7346) @[guo-shaoge](https://github.com/guo-shaoge)
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+ TiFlash

- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-8.2.0.md > 错误修复> TiFlash - 修复通过 BR 或 TiDB Lightning 导入数据后，FastScan 模式下可能读到大量重复行数据的问题 [#9118](https://github.com/pingcap/tiflash/issues/9118) @[JinheLin](https://github.com/JinheLin)
- (dup): release-6.5.10.md > 错误修复> TiFlash - 修复函数 `SUBSTRING_INDEX()` 可能导致 TiFlash Crash 的问题 [#9116](https://github.com/pingcap/tiflash/issues/9116) @[wshwsh12](https://github.com/wshwsh12)
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+ Tools

+ Backup & Restore (BR)

- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-6.5.10.md > 错误修复> Tools> Backup & Restore (BR) - 修复日志备份在 advancer owner 发生迁移后可能被暂停的问题 [#53561](https://github.com/pingcap/tidb/issues/53561) @[RidRisR](https://github.com/RidRisR)
- (dup): release-6.5.10.md > 错误修复> Tools> Backup & Restore (BR) - 修复在恢复过程中，由于多层重试导致 BR 无法正确识别错误的问题 [#54053](https://github.com/pingcap/tidb/issues/54053) @[RidRisR](https://github.com/RidRisR)
- (dup): release-8.2.0.md > 错误修复> Tools> Backup & Restore (BR) - 修复增量备份过程中扫描 DDL 作业的效率较低的问题 [#54139](https://github.com/pingcap/tidb/issues/54139) @[3pointer](https://github.com/3pointer)
- (dup): release-8.2.0.md > 错误修复> Tools> Backup & Restore (BR) - 修复断点备份过程中查找 Region leader 中断导致备份性能受影响问题 [#17168](https://github.com/tikv/tikv/issues/17168) @[Leavrth](https://github.com/Leavrth)
- (dup): release-8.1.0.md > 错误修复> Tools> Backup & Restore (BR) - 修复日志备份在暂停、停止、再重建任务操作后，虽然任务状态显示正常，但 Checkpoint 不推进的问题 [#53047](https://github.com/pingcap/tidb/issues/53047) @[RidRisR](https://github.com/RidRisR)
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+ TiCDC

- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ TiDB Data Migration (DM)

- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ TiDB Lightning

- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ Dumpling

- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- (dup): release-6.5.10.md > 错误修复> Tools> Dumpling - 修复 Dumpling 在同时导出表和视图时报错的问题 [#53682](https://github.com/pingcap/tidb/issues/53682) @[tangenta](https://github.com/tangenta)

+ TiUP

- note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})

+ TiDB Binlog

- note [#issue](https://github.com/pingcap/tidb-binlog/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
- note [#issue](https://github.com/pingcap/tidb-binlog/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id})
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