add summary for releases (#16377)

pingcap · Jan 30, 2024 · 5dcc785 · 5dcc785
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diff --git a/releases/release-1.0-ga.md b/releases/release-1.0-ga.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.0 release notes
 aliases: ['/docs/dev/releases/release-1.0-ga/','/docs/dev/releases/ga/']
+summary: TiDB 1.0 is released with a focus on MySQL compatibility, SQL optimization, stability, and performance. It includes enhancements to the SQL query optimizer, internal data format optimization, and support for various operators. PD now supports read flow based balancing and setting store weight. TiKV has improved coprocessor support and performance, and added a Debug API. Special thanks to enterprises, open source software, and individual contributors for their support.
 ---
 
 # TiDB 1.0 Release Notes

diff --git a/releases/release-1.0.2.md b/releases/release-1.0.2.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.0.2 Release Notes
 aliases: ['/docs/dev/releases/release-1.0.2/','/docs/dev/releases/102/']
+summary: TiDB 1.0.2 was released on November 13, 2017. Updates include optimized cost estimation for index point query, support for Alter Table Add Column syntax, and improved query optimization. Placement Driver (PD) scheduling stability was enhanced, and TiKV now supports table splitting and limits key length to 4 KB. Other improvements include more accurate read traffic statistics and bug fixes for LIKE behavior and do_div_mod bug.
 ---
 
 # TiDB 1.0.2 Release Notes

diff --git a/releases/release-1.0.4.md b/releases/release-1.0.4.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.0.4 Release Notes
 aliases: ['/docs/dev/releases/release-1.0.4/','/docs/dev/releases/104/']
+summary: TiDB 1.0.4 was released on December 11, 2017. Updates include speed improvements, performance enhancements, and fixes for potential issues in TiDB and TiKV. To upgrade from 1.0.3 to 1.0.4, follow the rolling upgrade order of PD, TiKV, and TiDB.
 ---
 
 # TiDB 1.0.4 Release Notes

diff --git a/releases/release-1.0.5.md b/releases/release-1.0.5.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.0.5 Release Notes
 aliases: ['/docs/dev/releases/release-1.0.5/','/docs/dev/releases/105/']
+summary: TiDB 1.0.5 was released on December 26, 2017. Updates include adding max value for Auto_Increment ID, fixing goroutine leak, supporting output of slow queries to separate file, loading TimeZone variable from TiKV, and more. PD fixes include balancing leaders and potential panic during bootstrapping. TiKV fixes slow CPU ID retrieval and supports dynamic-level-bytes parameter. Upgrade order is PD -> TiKV -> TiDB.
 ---
 
 # TiDB 1.0.5 Release Notes

diff --git a/releases/release-1.0.6.md b/releases/release-1.0.6.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.0.6 Release Notes
 aliases: ['/docs/dev/releases/release-1.0.6/','/docs/dev/releases/106/']
+summary: TiDB 1.0.6 was released on January 08, 2018. Updates include support for Alter Table Auto_Increment syntax, fixing bugs in Cost Based computation and Null Json issue, and support for extension syntax to shard implicit row ID. Other updates include fixing potential DDL issue, considering timezone setting in certain functions, and support for SEPARATOR syntax in GROUP_CONCAT function. PD fixed store selection problem of hot-region scheduler. To upgrade from 1.0.5 to 1.0.6, follow the rolling upgrade order of PD, TiKV, TiDB.
 ---
 
 # TiDB 1.0.6 Release Notes

diff --git a/releases/release-1.0.8.md b/releases/release-1.0.8.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.0.8 Release Notes
 aliases: ['/docs/dev/releases/release-1.0.8/','/docs/dev/releases/108/']
+summary: TiDB 1.0.8 is released with updates including fixes for various issues, performance optimizations, and stability improvements. PD and TiKV also have updates related to reducing lock overheat, fixing leader selection issues, and improving starting speed. To upgrade, follow the order of PD -> TiKV -> TiDB.
 ---
 
 # TiDB 1.0.8 Release Notes

diff --git a/releases/release-1.1-alpha.md b/releases/release-1.1-alpha.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.1 Alpha Release Notes
 aliases: ['/docs/dev/releases/release-1.1-alpha/','/docs/dev/releases/11alpha/']
+summary: TiDB 1.1 Alpha, released on January 19, 2018, brings significant improvements in MySQL compatibility, SQL optimization, stability, and performance. Key updates include enhanced SQL parser, query optimizer, and executor, as well as server support for the PROXY protocol. PD now offers more APIs, TLS support, and improved scheduling, while TiKV introduces Raft learner support, TLS, and performance optimizations. Additionally, it enhances data recovery tools and improves flow control mechanisms.
 ---
 
 # TiDB 1.1 Alpha Release Notes

diff --git a/releases/release-1.1-beta.md b/releases/release-1.1-beta.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 1.1 Beta Release Notes
 aliases: ['/docs/dev/releases/release-1.1-beta/','/docs/dev/releases/11beta/']
+summary: TiDB 1.1 Beta, released on February 24, 2018, brings significant improvements in MySQL compatibility, SQL optimization, stability, and performance. Key updates include more monitoring metrics, enhanced MySQL syntax compatibility, improved query optimization, and stability fixes. PD introduces new debug interfaces, priority settings, and performance optimizations. TiKV adds support for resolving locks in batches, GC concurrency, and more recovery operations in `tikv-ctl`. Overall, TiDB 1.1 Beta shows great improvement in test results and stability.
 ---
 
 # TiDB 1.1 Beta Release Notes

diff --git a/releases/release-2.0-ga.md b/releases/release-2.0-ga.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0 Release Notes
 aliases: ['/docs/dev/releases/release-2.0-ga/','/docs/dev/releases/2.0ga/']
+summary: TiDB 2.0 GA release on April 27, 2018, brings improvements in MySQL compatibility, SQL optimizer, executor, and stability. Key updates include compact data structure for memory usage reduction, Stream Aggregation operator for empty GROUP BY clause, and support for more MySQL syntaxes. TiKV features include `Region Merge`, `Raw DeleteRange` API, and improved read performance using `ReadPool`. TiSpark 1.0 GA provides distributed computing of TiDB data using Apache Spark, with support for gRPC communication framework, calculation pushdown, index related support, cost-based optimization, and multiple Spark interfaces.
 ---
 
 # TiDB 2.0 Release Notes

diff --git a/releases/release-2.0-rc.3.md b/releases/release-2.0-rc.3.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0 RC3 Release Notes
 aliases: ['/docs/dev/releases/release-2.0-rc.3/','/docs/dev/releases/2rc3/']
+summary: TiDB 2.0 RC3, released on March 23, 2018, brings improvements in MySQL compatibility, SQL optimization, and stability. It includes fixes for various issues, optimizations for execution speed, memory control, and DDL job management. PD now supports Region Merge and has optimizations for leader balance and abnormal Regions. TiKV also supports Region Merge, Raft snapshot process, and streaming in Coprocessor, with various improvements in space management and data recovery.
 ---
 
 # TiDB 2.0 RC3 Release Notes

diff --git a/releases/release-2.0-rc.4.md b/releases/release-2.0-rc.4.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0 RC4 Release Notes
 aliases: ['/docs/dev/releases/release-2.0-rc.4/','/docs/dev/releases/2rc4/']
+summary: TiDB 2.0 RC4, released on March 30, 2018, brings improvements in MySQL compatibility, SQL optimization, and stability. Key updates include support for various syntax, bug fixes, and performance optimizations in TiDB, PD, and TiKV. Notable changes include manual Region splitting in PD, memory usage limitation in TiKV, and support for data pattern import. Overall, the release focuses on enhancing functionality and addressing performance issues.
 ---
 
 # TiDB 2.0 RC4 Release Notes

diff --git a/releases/release-2.0-rc.5.md b/releases/release-2.0-rc.5.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0 RC5 Release Notes
 aliases: ['/docs/dev/releases/release-2.0-rc.5/','/docs/dev/releases/2rc5/']
+summary: TiDB 2.0 RC5 was released on April 17, 2018, with improvements in MySQL compatibility, SQL optimization, and stability. Fixes and optimizations were made to TiDB, PD, and TiKV components, including support for Raft Learner, reducing scheduling overhead, and adding new batch operations. The release also addressed issues related to memory usage, error reporting, and configuration adjustments.
 ---
 
 # TiDB 2.0 RC5 Release Notes

diff --git a/releases/release-2.0.10.md b/releases/release-2.0.10.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.10 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.10/','/docs/dev/releases/2.0.10/']
+summary: TiDB 2.0.10 and TiDB Ansible 2.0.10 were released on December 18, 2018. The release includes improvements in system compatibility and stability. Fixes include issues with DDL jobs, ORDER BY and UNION clauses, UNCOMPRESS function, ANSI_QUOTES SQL_MODE, select results, and more. PD fixes a possible RaftCluster deadlock issue, while TiKV optimizes leader transfer and fixes redundant Region heartbeats.
 ---
 
 # TiDB 2.0.10 Release Notes

diff --git a/releases/release-2.0.11.md b/releases/release-2.0.11.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.11 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.11/','/docs/dev/releases/2.0.11/']
+summary: TiDB 2.0.11 and TiDB Ansible 2.0.11 were released on January 3, 2019. The release includes improvements in system compatibility and stability. Fixes include handling errors when PD is in an abnormal condition, compatibility issues with MySQL, error message reporting, prefix index range, and panic issues with the `UPDATE` statement. TiKV also fixed two issues related to Region merge.
 ---
 
 # TiDB 2.0.11 Release Notes

diff --git a/releases/release-2.0.2.md b/releases/release-2.0.2.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.2 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.2/','/docs/dev/releases/202/']
+summary: TiDB 2.0.2 was released on May 21, 2018, with improvements in system stability. The release includes fixes for Decimal division expression, support for `USE INDEX` syntax in `Delete` statement, and timeout mechanism for writing Binlog in TiDB. PD now filters disconnected nodes in balance leader scheduler, modifies transfer leader operator timeout, and fixes scheduling issues. TiKV fixes Raft log printing, supports configuring gRPC parameters, leader election timeout range, and resolves snapshot intermediate file deletion issue.
 ---
 
 # TiDB 2.0.2 Release Notes

diff --git a/releases/release-2.0.3.md b/releases/release-2.0.3.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.3 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.3/','/docs/dev/releases/203/']
+summary: TiDB 2.0.3 was released on June 1, 2018, with improvements in system compatibility and stability. It includes various fixes and optimizations for TiDB, PD, and TiKV. Some highlights are support for modifying log level online, fixing issues with unique index and `ON DUPLICATE KEY UPDATE`, and addressing panic issues in specific conditions.
 ---
 
 # TiDB 2.0.3 Release Notes

diff --git a/releases/release-2.0.4.md b/releases/release-2.0.4.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.4 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.4/','/docs/dev/releases/204/']
+summary: TiDB 2.0.4 was released on June 15, 2018, with improvements in system compatibility and stability. It includes various enhancements and fixes for TiDB, PD, and TiKV. Some highlights for TiDB are support for `ALTER TABLE t DROP COLUMN a CASCADE` syntax, refining statement type display, and fixing issues related to data conversion and result order. PD now has improved behavior for the `max-pending-peer-count` argument, while TiKV includes the addition of the RocksDB `PerfContext` interface and fixes for slow `reverse-seek` and crash issues.
 ---
 
 # TiDB 2.0.4 Release Notes

diff --git a/releases/release-2.0.5.md b/releases/release-2.0.5.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.5 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.5/','/docs/dev/releases/205/']
+summary: TiDB 2.0.5 was released on July 6, 2018, with improvements in system compatibility and stability. New features include the `tidb_disable_txn_auto_retry` system variable. Bug fixes address issues with user login, data insertion, and command compatibility. PD and TiKV also received fixes for various issues.
 ---
 
 # TiDB 2.0.5 Release Notes

diff --git a/releases/release-2.0.7.md b/releases/release-2.0.7.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.7 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.7/','/docs/dev/releases/207/']
+summary: TiDB 2.0.7 was released on September 7, 2018, with improvements in system compatibility and stability. New features include the addition of the `PROCESSLIST` table in `information_schema`. Bug fixes address issues with index usage, join output, and query conditions. TiKV now opens the `dynamic-level-bytes` parameter by default to reduce space amplification, and updates approximate size and keys count after region merging.
 ---
 
 # TiDB 2.0.7 Release Notes

diff --git a/releases/release-2.0.8.md b/releases/release-2.0.8.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.0.8 Release Notes
 aliases: ['/docs/dev/releases/release-2.0.8/','/docs/dev/releases/208/']
+summary: TiDB 2.0.8 was released on October 16, 2018, with improvements in system compatibility and stability. The release includes various bug fixes for TiDB and TiKV, addressing issues related to AUTO-ID, etcd session recovery, time zone handling, memory leaks, and join conversions. The TiKV bug fix resolves the increasing memory consumption by Raftstore EntryCache when a node goes down.
 ---
 
 # TiDB 2.0.8 Release Notes

diff --git a/releases/release-2.1-beta.md b/releases/release-2.1-beta.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1 Beta Release Notes
 aliases: ['/docs/dev/releases/release-2.1-beta/','/docs/dev/releases/21beta/']
+summary: TiDB 2.1 Beta release includes improvements in stability, SQL optimizer, statistics, and execution engine. It supports more MySQL syntax, decreases memory usage, and optimizes DDL and DML statements. PD enables Raft PreVote, optimizes scheduler issues, and adds metrics. TiKV upgrades Rust, adds metrics, and improves performance. Compatibility notes include not supporting rollback to v2.0.x and enabling raft learner by default in the new version.
 ---
 
 # TiDB 2.1 Beta Release Notes

diff --git a/releases/release-2.1-rc.1.md b/releases/release-2.1-rc.1.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1 RC1 Release Notes
 aliases: ['/docs/dev/releases/release-2.1-rc.1/','/docs/dev/releases/21rc1/']
+summary: TiDB 2.1 RC1 was released on August 24, 2018, with improvements in stability, SQL optimizer, statistics, and execution engine. The release includes fixes for various issues in SQL optimizer and execution engine. PD introduces version control, rolling update, and region merge features. TiKV supports batch split and row-based region splitting for improved efficiency. Overall, the release focuses on performance optimization and bug fixes.
 ---
 
 # TiDB 2.1 RC1 Release Notes

diff --git a/releases/release-2.1-rc.2.md b/releases/release-2.1-rc.2.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1 RC2 Release Notes
 aliases: ['/docs/dev/releases/release-2.1-rc.2/','/docs/dev/releases/21rc2/']
+summary: TiDB 2.1 RC2 was released on September 14, 2018, with improvements in stability, SQL optimizer, statistics, and execution engine. The release includes enhancements to SQL optimizer, SQL execution engine, statistics, server, compatibility, expressions, DML, DDL, TiKV Go Client, and Table Partition. PD features, improvements, and bug fixes are also included. TiKV performance, improvements, and bug fixes are part of the release as well.
 ---
 
 # TiDB 2.1 RC2 Release Notes

diff --git a/releases/release-2.1-rc.3.md b/releases/release-2.1-rc.3.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1 RC3 Release Notes
 aliases: ['/docs/dev/releases/release-2.1-rc.3/','/docs/dev/releases/21rc3/']
+summary: TiDB 2.1 RC3 was released on September 29, 2018, with improvements in stability, compatibility, SQL optimizer, and execution engine. The release includes fixes and enhancements for SQL optimizer, execution engine, server, compatibility, expressions, DML, DDL, and PD. TiKV also received performance optimizations, new features, and bug fixes.
 ---
 
 # TiDB 2.1 RC3 Release Notes

diff --git a/releases/release-2.1-rc.4.md b/releases/release-2.1-rc.4.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1 RC4 Release Notes
 aliases: ['/docs/dev/releases/release-2.1-rc.4/','/docs/dev/releases/21rc4/']
+summary: TiDB 2.1 RC4 was released on October 23, 2018, with improvements in stability, SQL optimizer, statistics information, and execution engine. Fixes include issues with SQL optimizer, execution engine, statistics, server, compatibility, expressions, and DDL. PD fixes issues with tombstone TiKV, data race, PD server getting stuck, and leader switching. TiKV optimizes RocksDB Write stall issue, adds raftstore tick metrics, and upgrades RocksDB and grpcio.
 ---
 
 # TiDB 2.1 RC4 Release Notes

diff --git a/releases/release-2.1-rc.5.md b/releases/release-2.1-rc.5.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1 RC5 Release Notes
 aliases: ['/docs/dev/releases/release-2.1-rc.5/','/docs/dev/releases/21rc5/']
+summary: TiDB 2.1 RC5 was released on November 12, 2018, with improvements in stability, SQL optimizer, statistics, and execution engine. Fixes include issues with IndexReader, IndexScan Prepared statement, Union statement, and JSON data conversion. Server improvements include log readability, table data retrieval, and environment variable additions. PD fixes issues related to Region key reading, `regions/check` API, PD restart join, and event loss. TiKV improves error messages, adds panic mark file, downgrades grpcio, and adds an upper limit to the `kv_scan` interface. Tools now support the TiDB-Binlog cluster.
 ---
 
 <!-- markdownlint-disable MD032 -->

diff --git a/releases/release-2.1.1.md b/releases/release-2.1.1.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1.1 Release Notes
 aliases: ['/docs/dev/releases/release-2.1.1/','/docs/dev/releases/2.1.1/']
+summary: TiDB 2.1.1 was released on December 12, 2018, with improvements in stability, SQL optimizer, statistics information, and execution engine. Fixes include round error of negative date, uncompress function data length check, and transaction retries. Default character set and collation of tables changed to utf8mb4. PD and TiKV also received various fixes and optimizations. Lightning tool optimized analyze mechanism and added support for storing checkpoint information locally. TiDB Binlog fixed output bug of pb files for tables with only primary key column.
 ---
 
 # TiDB 2.1.1 Release Notes

diff --git a/releases/release-2.1.10.md b/releases/release-2.1.10.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1.10 Release Notes
 aliases: ['/docs/dev/releases/release-2.1.10/','/docs/dev/releases/2.1.10/']
+summary: TiDB 2.1.10 was released on May 22, 2019, with various bug fixes and improvements. The release includes fixes for issues related to table schema, read results, generated columns, datetime functions, slow logs, and more. Additionally, improvements were made to TiKV and tools like TiDB Lightning and TiDB Binlog. The TiDB Ansible version 2.1.10 also received updates.
 ---
 
 # TiDB 2.1.10 Release Notes

diff --git a/releases/release-2.1.11.md b/releases/release-2.1.11.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1.11 Release Notes
 aliases: ['/docs/dev/releases/release-2.1.11/','/docs/dev/releases/2.1.11/']
+summary: TiDB 2.1.11 was released on June 03, 2019. It includes fixes for various issues in TiDB, PD, TiKV, and Tools. Some highlights are the fix for incorrect schema in delete from join, calculation errors of unix_timestamp(), and the addition of Drainer parameters in TiDB Ansible.
 ---
 
 # TiDB 2.1.11 Release Notes

diff --git a/releases/release-2.1.12.md b/releases/release-2.1.12.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1.12 Release Notes
 aliases: ['/docs/dev/releases/release-2.1.12/','/docs/dev/releases/2.1.12/']
+summary: TiDB 2.1.12 was released on June 13, 2019. It includes various bug fixes and improvements, such as fixing issues with data type mismatches, charset altering, and GRANT operations. The release also improves compatibility with MySQL and addresses issues with functions, data conversion, and error reporting. Additionally, PD and TiKV have also been updated to fix issues related to leader election and data availability during leader transfer and power failure.
 ---
 
 # TiDB 2.1.12 Release Notes

diff --git a/releases/release-2.1.13.md b/releases/release-2.1.13.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1.13 Release Notes
 aliases: ['/docs/dev/releases/release-2.1.13/','/docs/dev/releases/2.1.13/']
+summary: TiDB 2.1.13 was released on June 21, 2019. It includes features to scatter row IDs, optimize DDL metadata lifetime, fix OOM issue, update statistics, support Region presplit, improve MySQL compatibility, and fix estimation issues. TiKV fixes incomplete snapshots and adds a feature to check the validity of the block-size configuration. TiDB Binlog fixes wrong offset and adds advertise-addr configuration in Drainer.
 ---
 
 # TiDB 2.1.13 Release Notes

diff --git a/releases/release-2.1.14.md b/releases/release-2.1.14.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1.14 Release Notes
 aliases: ['/docs/dev/releases/release-2.1.14/','/docs/dev/releases/2.1.14/']
+summary: TiDB 2.1.14 was released on July 04, 2019. It includes various bug fixes and improvements, such as fixing wrong query results, adding new system variables, optimizing memory usage, and adding new configuration items for TiDB Binlog and TiDB Ansible. Additionally, there are optimizations for TiKV and PD.
 ---
 
 # TiDB 2.1.14 Release Notes

diff --git a/releases/release-2.1.15.md b/releases/release-2.1.15.md
@@ -1,6 +1,7 @@
 ---
 title: TiDB 2.1.15 Release Notes
 aliases: ['/docs/dev/releases/release-2.1.15/','/docs/dev/releases/2.1.15/']
+summary: TiDB 2.1.15 was released on July 16, 2019. It includes various bug fixes and improvements, such as fixing issues with functions like DATE_ADD and INSERT, adding new SQL statements like SHOW TABLE REGIONS, and enhancing the Audit plugin. TiKV and PD also received updates to unify log formats and improve accuracy. Additionally, there were optimizations made to TiDB Binlog and TiDB Lightning, and new monitoring items added to TiDB Ansible.
 ---
 
 # TiDB 2.1.15 Release Notes