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changelog: add release note v2.1.4 #9312

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Feb 15, 2019
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changelog: add release note v2.1.4 #9312

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d1a524c
add release note 2.1.4
jackysp Feb 15, 2019
39ef21b
update the release note
jackysp Feb 15, 2019
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20 changes: 20 additions & 0 deletions CHANGELOG.md
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# TiDB Changelog
All notable changes to this project will be documented in this file. See also [Release Notes](https://github.com/pingcap/docs/blob/master/releases/rn.md), [TiKV Changelog](https://github.com/tikv/tikv/blob/master/CHANGELOG.md) and [PD Changelog](https://github.com/pingcap/pd/blob/master/CHANGELOG.md).

## [2.1.4] 2019-02-15

### SQL Optimizer/Executor

* Fix the issue that the `VALUES` function does not handle the FLOAT type correctly [#9223](https://github.com/pingcap/tidb/pull/9223)
* Fix the wrong result issue when casting Float to String in some cases [#9227](https://github.com/pingcap/tidb/pull/9227)
* Fix the wrong result issue of the `FORMAT` function in some cases [#9235](https://github.com/pingcap/tidb/pull/9235)
* Fix the panic issue when handling the Join query in some cases [#9264](https://github.com/pingcap/tidb/pull/9264)
* Fix the issue that the `VALUES` function does not handle the ENUM type correctly [#9280](https://github.com/pingcap/tidb/pull/9280)
* Fix the wrong result issue of `DATE_ADD` / `DATE_SUB` in some cases [#9284](https://github.com/pingcap/tidb/pull/9284)

### Server

* Optimize the "reload privilege success" log and change it to the DEBUG level [#9274](https://github.com/pingcap/tidb/pull/9274)

### DDL

* Change `tidb_ddl_reorg_worker_cnt` and `tidb_ddl_reorg_batch_size` to global variables [#9134](https://github.com/pingcap/tidb/pull/9134)
* Fix the bug caused by adding an index to a generated column in some abnormal conditions [#9289](https://github.com/pingcap/tidb/pull/9289)

## [2.1.3] 2019-01-25

### SQL Optimizer/Executor
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