releases: add tidb 5.0.1 release notes

TOC.md

@@ -537,6 +537,7 @@
   + [All Releases](/releases/release-notes.md)
   + [TiDB Roadmap](/roadmap.md)
   + v5.0
+    + [5.0.1](/releases/release-5.0.1.md)
     + [5.0 GA](/releases/release-5.0.0.md)
     + [5.0.0-rc](/releases/release-5.0.0-rc.md)
   + v4.0

releases/release-5.0.1.md

@@ -0,0 +1,86 @@
+---
+title: TiDB 5.0.1 Release Notes
+---
+
+# TiDB 5.0.1 Release Notes
+
+Release date: April 23, 2021
+
+TiDB version: 5.0.1
+
+## Compatibility Changes
+
+## New Features
+
+## Improvements
+
++ TiKV
+
+    - Use `zstd` to compress the snapshot [#10005](https://github.com/tikv/tikv/pull/10005)
+
+## Bug Fixes
+
++ TiDB
+
+    - Do not prune all columns for Projection [#24093](https://github.com/pingcap/tidb/pull/24093)
+    - Fix wrong query result when column contains null values [#24063](https://github.com/pingcap/tidb/pull/24063)
+    - Do not build MPP plan for scan with virtual columns [#24058](https://github.com/pingcap/tidb/pull/24058)
+    - Fix wrong PointGet / TableDual plan reused in plan cache [#24043](https://github.com/pingcap/tidb/pull/24043)
+    - Append common handle columns into the schema of index merge table plan [#24042](https://github.com/pingcap/tidb/pull/24042)
+    - Fix the type merging about BIT type [#24027](https://github.com/pingcap/tidb/pull/24027)
+    - Fix wrong TableDual plans caused by comparing Binary and Bytes incorrectly [#23918](https://github.com/pingcap/tidb/pull/23918)
+    - Fix the issue that planner hints don't work in some batch/point-get plans [#23685](https://github.com/pingcap/tidb/pull/23685)
+    - Fix the cases that DDL would parse the args failed when converting job status to rolling back [#24080](https://github.com/pingcap/tidb/pull/24080)
+    - Fix range building for binary literal [#24041](https://github.com/pingcap/tidb/pull/24041)
+    - Fix wrong results for in clause [#24023](https://github.com/pingcap/tidb/pull/24023)
+    - Fix the wrong result of some string functions  [#23879](https://github.com/pingcap/tidb/pull/23879)
+    - Users now need both INSERT and DELETE privileges on a table to perform REPLACE [#23939](https://github.com/pingcap/tidb/pull/23939)
+    - Fix performance regression of point select [#24070](https://github.com/pingcap/tidb/pull/24070)
+
++ TiKV
+
+    - Fix IN expr(coprocessor) didn't handle unsigned/signed int properly [#10018](https://github.com/tikv/tikv/pull/10018)
+    - Fix the issue that there are lots of empty regions after batch ingest. [#10015](https://github.com/tikv/tikv/pull/10015)
+    - Fix potential panics when input of cast_string_as_time is invalid UTF-8 bytes [#9995](https://github.com/tikv/tikv/pull/9995)
+    - Fix the bug that TiKV cannot startup when the end of file dict file is damaged. [#9992](https://github.com/tikv/tikv/pull/9992)
+
++ TiFlash
+
+    - Fix a potential issue that the DeleteRange in the storage engine failed to remove some data. [#1790](https://github.com/pingcap/tics/pull/1790)
+    - Fix problem that TiFlash coprocessor's cast time as int function may produce incorrect result. [#1786](https://github.com/pingcap/tics/pull/1786)
+    - Fix the bug that receiver cannot find tasks within 10s. [#1784](https://github.com/pingcap/tics/pull/1784)
+    - Fix potential invalid iterator in cancelMPPQuery [#1777](https://github.com/pingcap/tics/pull/1777)
+    - Fix problem that behavior of TiFlash coprocessor's bitwise operator is different from TiDB [#1774](https://github.com/pingcap/tics/pull/1774)
+    - Fix false alert of overlapped ranges if prefix next key is used [#1771](https://github.com/pingcap/tics/pull/1771)
+    - Fix the problem that TiFlash coprocessor's cast string as int function may produce incorrect result. [#1768](https://github.com/pingcap/tics/pull/1768)
+    - Fix the issue that continuous and fast writing may make TiFlash OOM [#1739](https://github.com/pingcap/tics/pull/1739)
+    - Fix bug that duplicated column name will make TiFlash throw error. [#1732](https://github.com/pingcap/tics/pull/1732)
+    - Support complex query plan tree with a max depth of 100. [#1722](https://github.com/pingcap/tics/pull/1722)
+    - Fix potential NPE in schema sync service when database is dropped between GC and getting the database info. [#1708](https://github.com/pingcap/tics/pull/1708)
+    - Fix the crash that causes by applying Raft commands to dropped tables [#1702](https://github.com/pingcap/tics/pull/1702)
+    - Fix the issue that TiFlash may panic during br restore [#1698](https://github.com/pingcap/tics/pull/1698)
+
+## 下面是未分类的 notes。请对以下 notes 分为 [New Features](#new-features)、[Compatibility Changes](#compatibility-changes)、[Improvements](#improvements)、[Bug Fixes](#bug-fixes) 四类，并移动到上面对应的标题下面。如果 Notes 多余，请进行移除。
+
++ PD
+
+    - Modify score calculator to satisfy isomerous stores [#3605](https://github.com/pingcap/pd/pull/3605)
+    - Avoid unexpected statistic modify after adding scatter region scheduler [#3602](https://github.com/pingcap/pd/pull/3602)
+
++ Tools
+
+    - BR
+
+        * BR now can tolerate minor TiKV disconnection. [#1019](https://github.com/pingcap/br/pull/1019)
+        * Summary now become more clear. [#1009](https://github.com/pingcap/br/pull/1009)
+
+    - TiCDC
+
+        * Fix Unified Sorter returning unhelpful error messages & other misc. fixes. [#1678](https://github.com/pingcap/ticdc/pull/1678)
+        * S3Sink:  cancel create existing table directory on s3 when initialize s3Sink to avoid uploading objects faild [#1672](https://github.com/pingcap/ticdc/pull/1672)
+        * Fix text type decode for old row format [#1669](https://github.com/pingcap/ticdc/pull/1669)
+        * No release note (this bug is never released) [#1667](https://github.com/pingcap/ticdc/pull/1667)
+        * Set session variable `explicit_defaults_for_timestamp` to `ON` to make downstream MySQL5.7 keeps the same behavior with upstream TiDB. [#1659](https://github.com/pingcap/ticdc/pull/1659)
+        * Fix the error handling for io.EOF may cause replication interuption. [#1648](https://github.com/pingcap/ticdc/pull/1648)
+        * Correct TiKV CDC endpoint CPU metric in TiCDC dashboard. [#1645](https://github.com/pingcap/ticdc/pull/1645)
+        * S3 sink: increase the defaultBufferChanSize of logSink to avoid blocking [#1632](https://github.com/pingcap/ticdc/pull/1632)

releases/release-notes.md

@@ -7,6 +7,7 @@ aliases: ['/docs/dev/releases/release-notes/','/docs/dev/releases/rn/']
 
 ## 5.0
 
+- [5.0.1](/releases/release-5.0.1.md)
 - [5.0 GA](/releases/release-5.0.0.md)
 - [5.0.0-rc](/releases/release-5.0.0-rc.md)