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v3.0 (stable) dev v2.1
  • Introduction
    • TiDB Introduction
    • Benchmarks
      • How to Test TiDB Using Sysbench
      • How to Run TPC-C Test on TiDB
      • Sysbench Performance Test - v3.0 vs. v2.1
      • TPC-C Performance Test - v3.0 vs. v2.1
      • Interaction Test on Online Workloads and `ADD INDEX` Operations
      • TiDB in Kubernetes Sysbench Test
      • DM 1.0-alpha Benchmark Report
      • DM 1.0-GA Benchmark Report
  • Concepts
    • Architecture
    • Key Features
      • Horizontal Scalability
      • MySQL Compatible Syntax
      • Replicate from and to MySQL
      • Distributed Transactions with Strong Consistency
      • Cloud Native Architecture
      • Minimize ETL with HTAP
      • Fault Tolerance & Recovery with Raft
      • Automatic Rebalancing
      • Deployment and Orchestration with Ansible, Kubernetes, Docker
      • JSON Support
      • Spark Integration
      • Read Historical Data Without Restoring from Backup
      • Fast Import and Restore of Data
      • Hybrid of Column and Row Storage
      • SQL Plan Management
      • Open Source
      • Online Schema Changes
  • How-to
    • Get Started
      • Start a Cluster
        • From Binary
        • From Homebrew
        • From DBdeployer
        • In Docker Compose
      • Explore SQL with TiDB
      • Import Example Database
      • Read Historical Data
      • TiDB Binlog Tutorial
      • TiDB Data Migration Tutorial
      • TiDB Lightning Tutorial
      • TiSpark Quick Start Guide
    • Deploy
      • Hardware Recommendations
      • From Binary Tarball
        • For Testing Environments
        • For Production Environments
      • Orchestrated Deployment
        • Ansible Deployment (Recommended)
        • Ansible Offline Deployment
        • Docker Deployment
      • Geographic Redundancy
        • Overview
        • Configure Location Awareness
      • Data Migration with Ansible
    • Configure
      • Time Zone
      • Memory Control
    • Secure
      • Transport Layer Security (TLS)
        • Enable TLS For MySQL Clients
        • Enable TLS Between TiDB Components
      • Generate Self-signed Certificates
    • Monitor
      • Overview
      • Monitor a TiDB Cluster
    • Migrate
      • Overview
      • Migrate from MySQL
        • Migrate the Full Data
        • Migrate the Incremental Data
      • Migrate from Aurora
      • Migrate from CSV
    • Maintain
      • Common Ansible Operations
      • Backup and Restore
        • Use `mydumper` and `loader`
        • Use BR
      • Identify Slow Queries
    • Scale
      • Scale using Ansible
      • Scale a TiDB Cluster
    • Upgrade
      • Upgrade to the Latest Version
    • Troubleshoot
      • Troubleshoot Cluster Setup
      • Troubleshoot TiDB Lightning
  • Reference
    • SQL
      • MySQL Compatibility
      • SQL Language Structure
        • Literal Values
        • Schema Object Names
        • Keywords and Reserved Words
        • User-Defined Variables
        • Expression Syntax
        • Comment Syntax
      • Data Types
        • Overview
        • Default Values
        • Numeric Types
          • `BIT`
          • `BOOL|BOOLEAN`
          • `TINYINT`
          • `SMALLINT`
          • `MEDIUMINT`
          • `INT|INTEGER`
          • `BIGINT`
          • `DECIMAL`
          • `FLOAT`
          • `DOUBLE`
        • Date and Time Types
          • `DATE`
          • `DATETIME`
          • `TIMESTAMP`
          • `TIME`
          • `YEAR`
        • String Types
          • `CHAR`
          • `VARCHAR`
          • `TEXT`
          • `LONGTEXT`
          • `BINARY`
          • `VARBINARY`
          • `TINYBLOB`
          • `BLOB`
          • `MEDIUMBLOB`
          • `LONGBLOB`
          • `ENUM`
          • `SET`
        • JSON Type
      • Functions and Operators
        • Function and Operator Reference
        • Type Conversion in Expression Evaluation
        • Operators
        • Control Flow Functions
        • String Functions
        • Numeric Functions and Operators
        • Date and Time Functions
        • Bit Functions and Operators
        • Cast Functions and Operators
        • Encryption and Compression Functions
        • Information Functions
        • JSON Functions
        • Aggregate (GROUP BY) Functions
        • Window Functions
        • Miscellaneous Functions
        • Precision Math
        • List of Expressions for Pushdown
      • SQL Statements
        • `ADD COLUMN`
        • `ADD INDEX`
        • `ADMIN`
        • `ALTER DATABASE`
        • `ALTER TABLE`
        • `ALTER USER`
        • `ANALYZE TABLE`
        • `BEGIN`
        • `COMMIT`
        • `CREATE DATABASE`
        • `CREATE INDEX`
        • `CREATE TABLE LIKE`
        • `CREATE TABLE`
        • `CREATE USER`
        • `CREATE VIEW`
        • `DEALLOCATE`
        • `DELETE`
        • `DESC`
        • `DESCRIBE`
        • `DO`
        • `DROP COLUMN`
        • `DROP DATABASE`
        • `DROP INDEX`
        • `DROP TABLE`
        • `DROP USER`
        • `DROP VIEW`
        • `EXECUTE`
        • `EXPLAIN ANALYZE`
        • `EXPLAIN`
        • `FLUSH PRIVILEGES`
        • `FLUSH STATUS`
        • `FLUSH TABLES`
        • `GRANT <privileges>`
        • `INSERT`
        • `KILL [TIDB]`
        • `LOAD DATA`
        • `MODIFY COLUMN`
        • `PREPARE`
        • `RECOVER TABLE`
        • `RENAME INDEX`
        • `RENAME TABLE`
        • `REPLACE`
        • `REVOKE <privileges>`
        • `ROLLBACK`
        • `SELECT`
        • `SET [NAMES|CHARACTER SET]`
        • `SET PASSWORD`
        • `SET TRANSACTION`
        • `SET [GLOBAL|SESSION] <variable>`
        • `SHOW CHARACTER SET`
        • `SHOW COLLATION`
        • `SHOW [FULL] COLUMNS FROM`
        • `SHOW CREATE TABLE`
        • `SHOW CREATE USER`
        • `SHOW DATABASES`
        • `SHOW ENGINES`
        • `SHOW ERRORS`
        • `SHOW [FULL] FIELDS FROM`
        • `SHOW GRANTS`
        • `SHOW INDEXES [FROM|IN]`
        • `SHOW INDEX [FROM|IN]`
        • `SHOW KEYS [FROM|IN]`
        • `SHOW PRIVILEGES`
        • `SHOW [FULL] PROCESSSLIST`
        • `SHOW SCHEMAS`
        • `SHOW [FULL] TABLES`
        • `SHOW TABLE REGIONS`
        • `SHOW TABLE STATUS`
        • `SHOW [GLOBAL|SESSION] VARIABLES`
        • `SHOW WARNINGS`
        • `SPLIT REGION`
        • `START TRANSACTION`
        • `TRACE`
        • `TRUNCATE`
        • `UPDATE`
        • `USE`
      • Constraints
      • Generated Columns
      • Partitioning
      • Character Set
      • SQL Mode
      • Views
    • Configuration
      • tidb-server
        • MySQL System Variables
        • TiDB Specific System Variables
        • Configuration Flags
        • Configuration File
      • pd-server
        • Configuration Flags
        • Configuration File
      • tikv-server
        • Configuration Flags
        • Configuration File
    • Security
      • Security Compatibility with MySQL
      • The TiDB Access Privilege System
      • TiDB User Account Management
      • Role-Based Access Control
    • Transactions
      • Overview
      • Transaction Model
      • Isolation Levels
      • Pessimistic Transactions
    • System Databases
      • `mysql`
      • `information_schema`
    • Errors Codes
    • Supported Client Drivers
    • Garbage Collection (GC)
      • GC Overview
      • GC Configuration
    • Performance
      • Overview
      • Understanding the Query Execution Plan
      • Introduction to Statistics
      • Optimizer Hints
      • Follower Read
      • Check the TiDB Cluster Status Using SQL Statements
      • Execution Plan Binding
      • Statement Summary Table
      • Tune TiKV
    • Key Monitoring Metrics
      • Overview
      • TiDB
      • PD
      • TiKV
    • Alert Rules
    • Best Practices
      • Highly Concurrent Write Best Practices
      • HAProxy Best Practices
    • TiSpark
    • TiDB Binlog
      • Overview
      • Deploy
      • Maintain
      • Monitor
      • Upgrade
      • Reparo
      • Binlog Slave Client
      • FAQ
    • Tools
      • Mydumper
      • Syncer
      • Loader
      • TiDB Data Migration
        • Overview
          • DM Overview
          • Restrictions
          • DM-worker
          • DM Relay Log
        • Features
          • Table Routing
          • Black and White Lists
          • Binlog Event Filter
          • Replication Delay Monitoring
          • Sharding Support
            • Introduction
            • Restrictions
            • Handle Sharding DDL Locks Manually
        • Usage Scenarios
          • Simple Scenario
          • Shard Merge Scenario
          • Shard Merge Best Practices
        • Deploy
        • Configure
          • Overview
          • Task Configuration
        • Manage the DM Cluster
          • Cluster Operations
          • Cluster Upgrade
        • Manage Replication Tasks
          • Manage Tasks
          • Precheck Tasks
          • Query Task Status
          • Skip or Replace Abnormal SQL Statements
        • Monitor
        • Migrate from MySQL compatible database
          • Migrate from Aurora
        • Troubleshoot
          • DM Troubleshooting
          • Error Description
          • Error Handling
        • FAQ
      • TiDB Lightning
        • Overview
        • Deployment
        • Configuration
        • Checkpoints
        • Table Filter
        • CSV Support
        • Web Interface
        • Monitor
        • Troubleshoot
        • FAQ
      • sync-diff-inspector
      • PD Control
      • PD Recover
      • TiKV Control
      • TiDB Control
      • Download
  • TiDB in Kubernetes
    • About TiDB Operator
    • Get Started
      • kind
      • GKE
      • Minikube
    • Deploy
      • Prerequisites
      • TiDB Operator
      • TiDB in General Kubernetes
      • TiDB in AWS EKS
      • TiDB in GCP GKE
      • TiDB in Alibaba Cloud ACK
      • Access TiDB in Kubernetes
    • Configure
      • Cluster Initialization
    • Monitor
    • Maintain
      • Destroy a TiDB cluster
      • Maintain a Hosting Kubernetes Node
      • Backup and Restore
      • Restore Data with TiDB Lightning
      • Collect Logs
      • Automatic Failover
      • TiDB Binlog
    • Scale
    • Upgrade
      • TiDB Cluster
      • TiDB Operator
    • Reference
      • Configuration
        • TiDB Cluster
        • Backup
        • PV
        • TiDB Drainer
      • Tools
        • tkctl
        • Tools in Kubernetes
    • Troubleshoot
    • FAQs
  • FAQs
    • TiDB FAQs
    • TiDB Lightning FAQs
    • Upgrade FAQs
  • Support
    • Support Resources
    • Report an Issue
  • Contribute
    • Contribute to TiDB
    • Improve the Docs
  • Adopters
  • Roadmap
  • Releases
    • v3.0
      • 3.0.7
      • 3.0.6
      • 3.0.5
      • 3.0.4
      • 3.0.3
      • 3.0.2
      • 3.0.1
      • 3.0 GA
      • 3.0.0-rc.3
      • 3.0.0-rc.2
      • 3.0.0-rc.1
      • 3.0.0-beta.1
      • 3.0.0-beta
    • v2.1
      • 2.1.18
      • 2.1.17
      • 2.1.16
      • 2.1.15
      • 2.1.14
      • 2.1.13
      • 2.1.12
      • 2.1.11
      • 2.1.10
      • 2.1.9
      • 2.1.8
      • 2.1.7
      • 2.1.6
      • 2.1.5
      • 2.1.4
      • 2.1.3
      • 2.1.2
      • 2.1.1
      • 2.1 GA
      • 2.1 RC5
      • 2.1 RC4
      • 2.1 RC3
      • 2.1 RC2
      • 2.1 RC1
      • 2.1 Beta
    • v2.0
      • 2.0.11
      • 2.0.10
      • 2.0.9
      • 2.0.8
      • 2.0.7
      • 2.0.6
      • 2.0.5
      • 2.0.4
      • 2.0.3
      • 2.0.2
      • 2.0.1
      • 2.0
      • 2.0 RC5
      • 2.0 RC4
      • 2.0 RC3
      • 2.0 RC1
      • 1.1 Beta
      • 1.1 Alpha
    • v1.0
      • 1.0.8
      • 1.0.7
      • 1.0.6
      • 1.0.5
      • 1.0.4
      • 1.0.3
      • 1.0.2
      • 1.0.1
      • 1.0
      • Pre-GA
      • RC4
      • RC3
      • RC2
      • RC1

TiDB 2.1.2 Release Notes

On December 22, 2018, TiDB 2.1.2 is released. The corresponding TiDB Ansible 2.1.2 is also released. Compared with TiDB 2.1.1, this release has great improvement in system compatibility and stability.

TiDB

  • Make TiDB compatible with TiDB Binlog of the Kafka version #8747
  • Improve the exit mechanism of TiDB in a rolling update #8707
  • Fix the panic issue caused by adding the index for the generated column in some cases #8676
  • Fix the issue that the optimizer cannot find the optimal query plan when TIDB_SMJ Hint exists in the SQL statement in some cases #8729
  • Fix the issue that AntiSemiJoin returns an incorrect result in some cases #8730
  • Improve the valid character check of the utf8 character set #8754
  • Fix the issue that the field of the time type might return an incorrect result when the write operation is performed before the read operation in a transaction #8746

PD

  • Fix the Region information update issue about Region merge #1377

TiKV

  • Support the configuration format in the unit of DAY (d) and fix the configuration compatibility issue #3931
  • Fix the possible panic issue caused by Approximate Size Split #3942
  • Fix two issues about Region merge #3822, #3873

Tools

  • TiDB Lightning
    • Make TiDB 2.1.0 the minimum cluster version supported by Lightning
    • Fix the content error of the file involving parsed JSON data in Lightning #144
    • Fix the issue that Too many open engines occurs after the checkpoint is used to restart Lightning
  • TiDB Binlog
    • Eliminate some bottlenecks of Drainer writing data to Kafka
    • Support the Kafka version of TiDB Binlog
"TiDB 2.1.2 Release Notes" was last updated Nov 15 2019: *: move binlog folder and refine tools toc (#1648) (67603b4)
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