- Introduction
- 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
- Deploy
- Hardware Recommendations
- From Binary Tarball
- Orchestrated Deployment
- Geographic Redundancy
- Data Migration with Ansible
- Configure
- Secure
- Transport Layer Security (TLS)
- Generate Self-signed Certificates
- Monitor
- Migrate
- Maintain
- Scale
- Upgrade
- Troubleshoot
- Reference
- SQL
- MySQL Compatibility
- SQL Language Structure
- Data Types
- 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
- Miscellaneous Functions
- Precision Math
- SQL Statements
ADD COLUMN
ADD INDEX
ADMIN
ADMIN CANCEL DDL
ADMIN CHECKSUM TABLE
ADMIN CHECK [TABLE|INDEX]
ADMIN SHOW DDL [JOBS|QUERIES]
ALTER DATABASE
ALTER TABLE
ALTER USER
ANALYZE TABLE
BEGIN
CHANGE COLUMN
COMMIT
CREATE DATABASE
CREATE INDEX
CREATE TABLE LIKE
CREATE TABLE
CREATE USER
DEALLOCATE
DELETE
DESC
DESCRIBE
DO
DROP COLUMN
DROP DATABASE
DROP INDEX
DROP TABLE
DROP USER
EXECUTE
EXPLAIN ANALYZE
EXPLAIN
FLUSH PRIVILEGES
FLUSH STATUS
FLUSH TABLES
GRANT <privileges>
INSERT
KILL [TIDB]
LOAD DATA
LOAD STATS
MODIFY COLUMN
PREPARE
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 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 STATUS
SHOW [FULL] TABLES
SHOW TABLE STATUS
SHOW [GLOBAL|SESSION] VARIABLES
SHOW WARNINGS
START TRANSACTION
TRACE
TRUNCATE
UPDATE
USE
- Constraints
- Generated Columns
- Character Set
- Configuration
- Security
- Transactions
- System Databases
- Errors Codes
- Supported Client Drivers
- Garbage Collection (GC)
- Performance
- Key Monitoring Metrics
- Alert Rules
- Best Practices
- TiSpark
- TiDB Binlog
- Tools
- Overview
- Use Cases
- Download
- Mydumper
- Syncer
- Loader
- TiDB Data Migration
- TiDB Lightning
- sync-diff-inspector
- PD Control
- PD Recover
- TiKV Control
- TiDB Control
- FAQs
- Support
- Contribute
- Releases
- All Releases
- v2.1
- v2.0
- v1.0
- Glossary
Important
You are viewing the documentation of an older version of the TiDB database (TiDB v2.1).
It is recommended that you use the latest LTS version of the TiDB database.
TiDB RC2 Release Notes
On August 4, 2017, TiDB RC4 is released! This release is focused on the compatibility with MySQL, SQL query optimizer, system stability and performance in this version. What’s more, a new permission management mechanism is added and users can control data access in the same way as the MySQL privilege management system.
TiDB
- Query optimizer
- Collect column/index statistics and use them in the query optimizer
- Optimize the correlated subquery
- Optimize the Cost Based Optimizer (CBO) framework
- Eliminate aggregation using unique key information
- Refactor expression evaluation framework
- Convert Distinct to GroupBy
- Support the topn operation push-down
- Support basic privilege management
- Add lots of MySQL built-in functions
- Improve the Alter Table statement and support the modification of table name, default value and comment
- Support the Create Table Like statement
- Support the Show Warnings statement
- Support the Rename Table statement
- Restrict the size of a single transaction to avoid the cluster blocking of large transactions
- Automatically split data in the process of Load Data
- Optimize the performance of the AddIndex and Delete statement
- Support "ANSI_QUOTES" sql_mode
- Improve the monitoring system
- Fix Bugs
- Solve the problem of memory leak
PD
- Support location aware replica scheduling
- Conduct fast scheduling based on the number of region
- pd-ctl support more features
- Add or delete PD
- Obtain Region information with Key
- Add or delete scheduler and operator
- Obtain cluster label information
TiKV
- Support Async Apply to improve the entire write performance
- Use prefix seek to improve the read performance of Write CF
- Use memory hint prefix to improve the insert performance of Raft CF
- Optimize the single read transaction performance
- Support more push-down expressions
- Improve the monitoring system
- Fix Bugs
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