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Merge pull request #750 from lilin90/release-203
releases, readme: add the release notes for 2.0.3
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title: TiDB 2.0.3 release notes | ||
category: Releases | ||
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# TiDB 2.0.3 Release Notes | ||
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2018 年 6 月 1 日,TiDB 发布 2.0.3 版。该版本在 2.0.2 版的基础上,对系统兼容性、稳定性做出了改进。 | ||
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## TiDB | ||
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- 支持在线更改日志级别 | ||
- 支持 `COM_CHANGE_USER` 命令 | ||
- 支持二进制协议情况下使用时间类型参数 | ||
- 优化带 `BETWEEN` 表达式的查询条件代价估算 | ||
- 在 `SHOW CREATE TABLE` 里不显示 `FOREIGN KEY` 信息 | ||
- 优化带 `LIMIT` 子句的查询代价估算 | ||
- 修复 `YEAR` 类型作为唯一索引的问题 | ||
- 修复在没有唯一索引的情况下 `ON DUPLICATE KEY UPDATE` 的问题 | ||
- 修复 `CEIL` 函数的兼容性问题 | ||
- 修复 `DECIMAL` 类型计算 `DIV` 的精度问题 | ||
- 修复 `ADMIN CHECK TABLE` 误报的问题 | ||
- 修复 `MAX`/`MIN` 在特定表达式参数下 panic 的问题 | ||
- 修复特殊情况下 `JOIN` 结果为空的问题 | ||
- 修复 `IN` 表达式构造查询 `Range` 的问题 | ||
- 修复使用 `Prepare` 方式进行查询且启用 `Plan Cache` 情况下的 Range 计算问题 | ||
- 修复异常情况下频繁加载 Schema 信息的问题 | ||
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## PD | ||
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- 修复在特定条件下收集 hot-cache metrics 会 panic 的问题 | ||
- 修复对旧的 Region 产生调度的问题 | ||
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## TiKV | ||
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- 修复 learner flag 错误上报给 PD 的 bug | ||
- 在 `do_div_mod` 中 `divisor/dividend` 为 0 时返回错误 |
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