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releases, readme: add 2.0.8 release notes #676

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Oct 16, 2018
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releases, readme: add 2.0.8 release notes
lilin90 Oct 16, 2018
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lilin90 Oct 16, 2018
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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -128,6 +128,7 @@
- [Frequently Asked Questions (FAQ)](FAQ.md)
- [TiDB Best Practices](https://pingcap.com/blog/2017-07-24-tidbbestpractice/)
+ [Releases](releases/rn.md)
- [2.0.8](releases/208.md)
- [2.1 RC3](releases/21rc3.md)
- [2.1 RC2](releases/21rc2.md)
- [2.0.7](releases/207.md)
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29 changes: 29 additions & 0 deletions releases/208.md
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---
title: TiDB 2.0.8 Release Notes
category: Releases
---

# TiDB 2.0.8 Release Notes

On October 16, 2018, TiDB 2.0.8 is released. Compared with TiDB 2.0.7, this release has great improvement in system compatibility and stability.

## TiDB

+ Improvement
- Slow down the AUTO-ID increasing speed when the `Update` statement does not modify the corresponding AUTO-INCREMENT column [#7846](https://github.com/pingcap/tidb/pull/7846)
+ Bug fixes
- Quickly create a new etcd session to recover the service when the PD leader goes down [#7810](https://github.com/pingcap/tidb/pull/7810)
- Fix the issue that the time zone is not considered when the default value of the `DateTime` type is calculated [#7672](https://github.com/pingcap/tidb/pull/7672)
- Fix the issue that `duplicate key update` inserts values incorrectly in some conditions [#7685](https://github.com/pingcap/tidb/pull/7685)
- Fix the issue that the predicate conditions of `UnionScan` are not pushed down [#7726](https://github.com/pingcap/tidb/pull/7726)
- Fix the issue that the time zone is not correctly handled when you add the `TIMESTAMP` index [#7812](https://github.com/pingcap/tidb/pull/7812)
- Fix the memory leak issue caused by the statistics module in some conditions [#7864](https://github.com/pingcap/tidb/pull/7864)
- Fix the issue that the results of `ANALYZE` cannot be obtained in some abnormal conditions [#7871](https://github.com/pingcap/tidb/pull/7871)
- Do not fold the function `SYSDATE`, to ensure the returned results are correct [#7894](https://github.com/pingcap/tidb/pull/7894)
- Fix the `substring_index` panic issue in some conditions [#7896](https://github.com/pingcap/tidb/pull/7896)
- Fix the issue that `OUTER JOIN` is mistakenly converted to `INNER JOIN` in some conditions [#7899](https://github.com/pingcap/tidb/pull/7899)

## TiKV

+ Bug fix
- Fix the issue that the memory consumed by Raftstore `EntryCache` keeps increasing when a node goes down [#3529](https://github.com/tikv/tikv/pull/3529)
1 change: 1 addition & 0 deletions releases/rn.md
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Expand Up @@ -5,6 +5,7 @@ category: release

# TiDB Release Notes

- [2.0.8](208.md)
- [2.1 RC3](21rc3.md)
- [2.1 RC2](21rc2.md)
- [2.0.7](207.md)
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