- 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
- Use BR (recommended)
- Identify Abnormal Queries
- Scale
- Upgrade
- Troubleshoot
- Reference
- SQL
- MySQL Compatibility
- SQL Language Structure
- Attributes
- 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 INSTANCE
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
- Follower Read
- 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
- TiFlash
- TiDB Binlog
- Tools
- Overview
- Use Cases
- Download
- TiDB Operator
- Table Filter
- Backup & Restore (BR)
- Mydumper
- Syncer
- Loader
- Data Migration
- TiDB Lightning
- sync-diff-inspector
- PD Control
- PD Recover
- TiKV Control
- TiDB Control
- TiDB in Kubernetes
- FAQs
- Support
- Contribute
- Releases
- All Releases
- v3.1
- v3.0
- v2.1
- v2.0
- v1.0
- Glossary
Important
You are viewing the documentation of an older version of the TiDB database (TiDB v3.1).
It is recommended that you use the latest LTS version of the TiDB database.
TiDB 3.0.10 Release Notes
Release date: February 20, 2020
TiDB version: 3.0.10
TiDB Ansible version: 3.0.10
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.
TiDB
- Fix wrong
Join
results whenIndexLookUpJoin
usesOtherCondition
to constructInnerRange
#14599 - Delete the
tidb_pprof_sql_cpu
configuration item and add thetidb_pprof_sql_cpu
variable #14416 - Fix the issue that users can query all databases only when they have global privileges #14386
- Fix the issue that data visibility does not meet expectations due to transaction timeout when executing
PointGet
operations #14480 - Change the timing of pessimistic transaction activation to delayed activation, consistent with the optimistic transaction mode #14474
- Fix the incorrect time zone results when the
unixtimestamp
expression calculates the time zone of the table partitions #14476 - Add the
tidb_session_statement_deadlock_detect_duration_seconds
monitoring item to monitor deadlock detection duration #14484 - Fix the system panic issue caused by some logic errors of GC workers #14439
- Correct the expression name of the
IsTrue
function #14516 - Fix the issue that some memory usage is counted inaccurately #14533
- Fix the system panic issue caused by incorrect processing logic during CM-Sketch statistics initialization #14470
- Fix the issue of inaccurate partition pruning when querying partitioned tables #14546
- Fix the issue that the default database name of the SQL statement in SQL bindings is set incorrectly #14548
- Fix the issue that
json_key
is not compatible with MySQL #14561 - Add the feature of automatically updating the statistics of partitioned tables #14566
- Fix the issue that the plan ID changes when the
PointGet
operation is executed (the plan ID is expected to be1
always) #14595 - Fix the system panic issue caused by incorrect processing logic when SQL bindings do not match exactly #14263
- Add the
tidb_session_statement_pessimistic_retry_count
monitoring item to monitor the number of retries after the failure to lock pessimistic transactions #14619 - Fix the incorrect privilege check for
show binding
statements #14618 - Fix the issue that the query cannot be killed because the
backoff
logic does not include checking thekilled
tag #14614 - Improve the performance of statement summary by reducing the time to hold internal locks #14627
- Fix the issue that TiDB's result of parsing strings to time is incompatible with MySQL #14570
- Record the user login failures in audit logs #14620
- Add the
tidb_session_ statement_lock_keys_count
monitoring item to monitor the number of lock keys for pessimistic transactions #14634 - Fix the issue that characters in JSON such as
&
,<
, and>
are incorrectly escaped #14637 - Fix the system panic issue caused by excessive memory usage when the
HashJoin
operation is building a hash table #14642 - Fix the panic issue caused by incorrect processing logic when an SQL binding processes illegal records #14645
- ix a MySQL incompatibility issue by adding Truncated error detection to decimal division calculation #14673
- Fix the issue of successfully granting users privileges on a table that does not exist #14611
TiKV
- Raftstore
PD
- Fix the invalid cache issue by supporting automatically updating the Region cache information when the system traffic changes #2103
- Use leader lease time to determine TSO service validity #2117
Tools
- TiDB Binlog
- Support relay log in Drainer #893
- TiDB Lightning
TiDB Ansible
- Fix the issue that the command execution fails due to the failure to obtain PD leader in some scenarios #1121
- Add the
Deadlock Detect Duration
monitoring item in the TiDB dashboard #1127 - Add the
Statement Lock Keys Count
monitoring item in the TiDB dashboard #1132 - Add the
Statement Pessimistic Retry Count
monitoring item in the TiDB dashboard #1133
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