After 6 RC versions, TiDB 2.0 GA was released. This release focuses on ensuring the stability and correctness of TiDB, improving the query performance and optimizing ease of use and maintainability of TiDB under large data volumes.
renew:
SQL Optimizer
Use more compact data structures to reduce memory usage for statistics
Speed up loading statistics when starting the tidb-server process
Support dynamic update statistics
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SQL Execution Engine
Optimize the Insert Into Ignore statement to improve performance by more than 10 times
Optimize the Insert On Duplicate Key Update statement to improve performance by more than 10 times
Optimize Load Data to improve performance by more than 10 times
Push more data types and functions to TiKV
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Server
Support Proxy protocol
Add more monitoring metrics and optimize logs
Support for authentication profiles
Support to obtain TiDB parameter information through HTTP API
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Compatibility
Support for more MySQL syntax
Support modifying the lower_case_table_names system variable in the configuration file to support the OGG data synchronization tool
Improve compatibility with Navicat management tools
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DDL
Optimize the Add Index operation to greatly improve the execution speed in some cases
De-prioritize Add Index operations to reduce impact on online business
Output more detailed status information for DDL jobs in Admin Show DDL Jobs
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Please see the release notes for details .
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