- 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
- Common Ansible Operations
- Backup and Restore
- Identify Abnormal Queries
- 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
- Window Functions
- Miscellaneous Functions
- Precision Math
- List of Expressions for Pushdown
- 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 ROLE
CREATE TABLE LIKE
CREATE TABLE
CREATE USER
CREATE VIEW
DEALLOCATE
DELETE
DESC
DESCRIBE
DO
DROP COLUMN
DROP DATABASE
DROP INDEX
DROP ROLE
DROP TABLE
DROP USER
DROP VIEW
EXECUTE
EXPLAIN ANALYZE
EXPLAIN
FLUSH PRIVILEGES
FLUSH STATUS
FLUSH TABLES
GRANT <privileges>
GRANT <role>
INSERT
KILL [TIDB]
LOAD DATA
LOAD STATS
MODIFY COLUMN
PREPARE
RECOVER TABLE
RENAME INDEX
RENAME TABLE
REPLACE
REVOKE <privileges>
REVOKE <role>
ROLLBACK
SELECT
SET DEFAULT ROLE
SET [NAMES|CHARACTER SET]
SET PASSWORD
SET ROLE
SET TRANSACTION
SET [GLOBAL|SESSION] <variable>
SHOW ANALYZE STATUS
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 STATUS
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
- Security
- Transactions
- System Databases
- Errors Codes
- Supported Client Drivers
- Garbage Collection (GC)
- Performance
- Overview
- Understanding the Query Execution Plan
- The Blocklist of Optimization Rules and Expression Pushdown
- Introduction to Statistics
- TopN and Limit Push Down
- Optimizer Hints
- Check the TiDB Cluster Status Using SQL Statements
- Execution Plan Binding
- Statement Summary Table
- Tune TiKV
- Operating System Tuning
- Column Pruning
- Key Monitoring Metrics
- Alert Rules
- Best Practices
- TiSpark
- TiKV
- TiDB Binlog
- Tools
- TiDB in Kubernetes
- FAQs
- Support
- Contribute
- Releases
- All Releases
- v3.0
- v2.1
- v2.0
- v1.0
- Glossary
Important
You are viewing the documentation of an older version of the TiDB database (TiDB v3.0).
It is recommended that you use the latest LTS version of the TiDB database.
TiDB 3.0.11 Release Notes
Release date: March 4, 2020
TiDB version: 3.0.11
TiDB Ansible version: 3.0.11
Warning
Some known issues are found in this version, and these issues are fixed in new versions. It is recommended that you use the latest 3.0.x version.
Compatibility Changes
- TiDB
- Add the
max-index-length
configuration item to control the maximum index length, which is compatible with the behavior of TiDB versions before 3.0.7 or of MySQL #15057
- Add the
New Features
TiDB
- Support showing the meta information of partitioned tables in the
information_schema.PARTITIONS
table #14849
- Support showing the meta information of partitioned tables in the
TiDB Binlog
TiDB Lightning
TiDB Ansible
- Modify the logic of
create_users.yml
so that users of the central control machine do not have to be consistent withansible_user
#1184
- Modify the logic of
Bug Fixes
TiDB
- Fix the issue of Goroutine leaks when retrying an optimistic transaction because queries using
Union
are not marked read-only #15076 - Fix the issue that
SHOW TABLE STATUS
fails to correctly output the table status at the snapshot time because the value of thetidb_snapshot
parameter is not correctly used when executing theSET SESSION tidb_snapshot = 'xxx';
statement #14391 - Fix the incorrect result caused by a SQL statement that contains
Sort Merge Join
andORDER BY DESC
at the same time #14664 - Fix the panic of TiDB server when creating partition tables using the unsupported expression. The error information
This partition function is not allowed
is returned after fixing this panic. #14769 - Fix the incorrect result occurred when executing the
select max() from subquery
statement with the subquery containingUnion
#14944 - Fix the issue that an error message is returned when executing the
SHOW BINDINGS
statement after executingDROP BINDING
that drops the execution binding #14865 - Fix the issue that the connection is broken because the maximum length of an alias in a query is 256 characters in the MySQL protocol, but TiDB does not cut the alias in the query results according to this protocol #14940
- Fix the incorrect query result that might occur when using the string type in
DIV
. For instance, now you can correctly execute theselect 1 / '2007' div 1
statement #14098
- Fix the issue of Goroutine leaks when retrying an optimistic transaction because queries using
TiKV
TiDB Ansible
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