releases: add TiDB 5.1.1 release notes

TOC.md

@@ -549,6 +549,7 @@
   + [All Releases](/releases/release-notes.md)
   + [TiDB Roadmap](/roadmap.md)
   + v5.1
+    + [5.1.1](/releases/release-5.1.1.md)
     + [5.1.0](/releases/release-5.1.0.md)
   + v5.0
     + [5.0.3](/releases/release-5.0.3.md)

releases/release-5.1.1.md

@@ -0,0 +1,113 @@
+---
+title: TiDB 5.1.1 Release Notes
+---
+
+# TiDB 5.1.1 Release Notes
+
+Release Date: July 30, 2021
+
+TiDB version: 5.1.1
+
+## Compatibility change
+
++ TiDB
+
+    - For users upgrading from TiDB 4.0, the value of tidb_multi_statement_mode is now OFF. It is recommended to use the multi-statement feature of your client library instead, see the documentation on tidb_multi_statement_mode for additional details. [#25751](https://github.com/pingcap/tidb/pull/25751)
+
+## Feature enhancements
+
+## Improvements
+
++ TiDB
+
+    - avoid alloc for paramMarker in buildValuesListOfInsert [#26076](https://github.com/pingcap/tidb/pull/26076)
+    - planner: support stable result mode [#25995](https://github.com/pingcap/tidb/pull/25995)
+
++ TiKV
+
+    - separate read write ready to reduce read latency [#10592](https://github.com/tikv/tikv/pull/10592)
+
+## Bug fixes
+
++ TiDB
+
+    - amend transactions correctly when "modify column" needs reorg data with tidb_enable_amend_pessimistic_txn=on. [#26273](https://github.com/pingcap/tidb/pull/26273)
+    - fix incompatible last_day func behavior in sql mode [#26001](https://github.com/pingcap/tidb/pull/26001)
+    - Make sure limit outputs no more columns than its child [#25980](https://github.com/pingcap/tidb/pull/25980)
+    - Fix the issue that committing pessimistic transactions may report write-conflict errors. [#25973](https://github.com/pingcap/tidb/pull/25973)
+    - planner: handle other-conditions from subqueries correctly when constructing IndexJoin [#25819](https://github.com/pingcap/tidb/pull/25819)
+    - Fix the bug that successful optimistic transactions may report commit errors. [#25803](https://github.com/pingcap/tidb/pull/25803)
+    - Fix incorrect result of set type for merge join [#25695](https://github.com/pingcap/tidb/pull/25695)
+
+## 以下 note 未分类。请将以下 note 进行分类 (New feature, Improvements, Bug fixes, Compatibility Changes 四类)，并移动到上面对应的标题下。如果某条 note 为多余的，请删除。如果漏抓取了 note，请手动补充
+
++ TiDB
+
+    - Fix the bug that index keys in a pessimistic transaction may be repeatedly committed. [#26482](https://github.com/pingcap/tidb/pull/26482)
+    - store/copr: support retry for mpp query [#26480](https://github.com/pingcap/tidb/pull/26480)
+    - planner: fix the risk of integer overflow when locating partitions [#26471](https://github.com/pingcap/tidb/pull/26471)
+    - ddl: fix cast date as timestamp will write invalid value [#26395](https://github.com/pingcap/tidb/pull/26395)
+    - exec: access the table_storage_stats need super privilege [#26352](https://github.com/pingcap/tidb/pull/26352)
+    - Fix copt-cache metrics, it will display the number of  hits/miss/evict on Grafana. [#26344](https://github.com/pingcap/tidb/pull/26344)
+    - Accessing information_schema.user_privileges will now requires the SELECT privilege on mysql.user in order to show other user's privileges. [#26311](https://github.com/pingcap/tidb/pull/26311)
+    - Reading from the table information_schema.cluster_hardware now requires the CONFIG privilege.
+    - Reading from the table information_schema.cluster_info now requires the Process privilege.
+    - Reading from the table information_schema.cluster_load now requires the Process privilege.
+    - Reading from the table information_schema.cluster_systeminfo now requires the Process privilege.
+    - Reading from the table information_schema.cluster_log now requires the Process privilege. [#26297](https://github.com/pingcap/tidb/pull/26297)
+    - fix the bug of annoying logs caused by telemetry [#26284](https://github.com/pingcap/tidb/pull/26284)
+    - Enable the pushdown of builtin function json_unquote() to TiKV. [#26265](https://github.com/pingcap/tidb/pull/26265)
+    - fix a bug on the query range of prefix index [#26262](https://github.com/pingcap/tidb/pull/26262)
+    - Fix the issue that concurrently truncating the same partition hangs DDL. [#26239](https://github.com/pingcap/tidb/pull/26239)
+    - Change the lock record into put record for the index keys using point/batch point get for update read. [#26225](https://github.com/pingcap/tidb/pull/26225)
+    - planner/core: fix duplicate enum items [#26202](https://github.com/pingcap/tidb/pull/26202)
+    - Forbid creating view from stale query [#26200](https://github.com/pingcap/tidb/pull/26200)
+    - planner/core: thoroughly push down count-distinct agg in the MPP mode. [#26194](https://github.com/pingcap/tidb/pull/26194)
+    - mpp: check the tiflash availabilities before launching mpp queries. [#26192](https://github.com/pingcap/tidb/pull/26192)
+    - Reading from the table information_schema.cluster_config now requires the CONFIG privilege. [#26150](https://github.com/pingcap/tidb/pull/26150)
+    - executor: fix a bug that cte.iterOutTbl did not close correctly [#26148](https://github.com/pingcap/tidb/pull/26148)
+    - load: fix load data with non-utf8 can succeed [#26144](https://github.com/pingcap/tidb/pull/26144)
+    - fix unsigned int window function error [#26027](https://github.com/pingcap/tidb/pull/26027)
+    - Enlarge the variable tidb_stmt_summary_max_stmt_count default value from 200 to 3000 [#25874](https://github.com/pingcap/tidb/pull/25874)
+    - Fix the issue that TiDB may panic when resolving async-commit locks. [#25862](https://github.com/pingcap/tidb/pull/25862)
+    - Make Stale Read fully support prepare statement [#25800](https://github.com/pingcap/tidb/pull/25800)
+    - Improve the MySQL compatibility of str_to_date for %b/%M/%r/%T [#25768](https://github.com/pingcap/tidb/pull/25768)
+    - Do not allow setting read timestamp to a future time. [#25763](https://github.com/pingcap/tidb/pull/25763)
+    - Log warnings when agg function can not be pushdown in explain statement [#25737](https://github.com/pingcap/tidb/pull/25737)
+    - Add cluster information of evicted count. [#25587](https://github.com/pingcap/tidb/pull/25587)
+    - Fix the issue that ODBC-styled literal(like {d '2020-01-01'}...) cannot be used as the expression. [#25578](https://github.com/pingcap/tidb/pull/25578)
+    - fix the bug about unnecessary error when run tidb only [#25555](https://github.com/pingcap/tidb/pull/25555)
+
++ TiKV
+
+    - Make prewrite as idempotent as possible to reduce the chance of undetermined errors. [#10586](https://github.com/tikv/tikv/pull/10586)
+    - Fix duration calculation panics on certain platforms [#10569](https://github.com/tikv/tikv/pull/10569)
+    - Fix unencoded keys of `batch_get_command` in load-base-split [#10565](https://github.com/tikv/tikv/pull/10565)
+    - Prevent the risk of stack overflow when handling many expired commands. [#10502](https://github.com/tikv/tikv/pull/10502)
+    - Fix online changing `resolved-ts.advance-ts-interval` can't take effect immediately [#10494](https://github.com/tikv/tikv/pull/10494)
+    - fix follower meta corruption in rare cases with more than 4 replicas [#10486](https://github.com/tikv/tikv/pull/10486)
+    - Avoid panic when building a snapshot twice if encryption enabled [#10464](https://github.com/tikv/tikv/pull/10464)
+    - Not use the stale read request's `start_ts` to update `max_ts` to avoid commit request keep retrying [#10451](https://github.com/tikv/tikv/pull/10451)
+    - Fix wrong tikv_raftstore_hibernated_peer_state metric. [#10432](https://github.com/tikv/tikv/pull/10432)
+    - copr: fix the wrong arguments type of json_unquote [#10428](https://github.com/tikv/tikv/pull/10428)
+
++ PD
+
+    - TiDB Dashboard: Add OIDC based SSO support [#3883](https://github.com/tikv/pd/pull/3883)
+    - Reduce the conflict due to multiple scheduler running in same time [#3857](https://github.com/tikv/pd/pull/3857)
+    - Fix the issue that the scheduler may appear again even if we have already executed the delete operation [#3824](https://github.com/tikv/pd/pull/3824)
+
++ Tools
+
+    + TiCDC
+
+        - Remove file sorter. [#2327](https://github.com/pingcap/ticdc/pull/2327)
+        - puller,mounter,processor: always pull the old value internally [#2306](https://github.com/pingcap/ticdc/pull/2306)
+        - Fix minor runtime panic risk [#2300](https://github.com/pingcap/ticdc/pull/2300)
+        - Fix potential DDL loss when owner crashes while executing DDL [#2290](https://github.com/pingcap/ticdc/pull/2290)
+        - Don't resolve lock immediately after a region is initialized. [#2266](https://github.com/pingcap/ticdc/pull/2266)
+        - Fix potential DDL loss when owner crashes while executing DDL [#2252](https://github.com/pingcap/ticdc/pull/2252)
+        - Don't resolve lock immediately after a region is initialized. [#2235](https://github.com/pingcap/ticdc/pull/2235)
+        - Better err msg when PD endpoint missing certificate [#2186](https://github.com/pingcap/ticdc/pull/2186)
+        - Fix a bug that could cause data losses if a TiCDC node is kills immediate after a table migration [#2033](https://github.com/pingcap/ticdc/pull/2033)
+        - Fix changefeed update to properly handle --sort-dir and --start-ts. [#1921](https://github.com/pingcap/ticdc/pull/1921)

releases/release-notes.md

@@ -7,6 +7,7 @@ aliases: ['/docs/dev/releases/release-notes/','/docs/dev/releases/rn/']
 
 ## 5.1
 
+- [5.1.1](/releases/release-5.1.1.md)
 - [5.1.0](/releases/release-5.1.0.md)
 
 ## 5.0