New Features

• Support collation utf8mb4_unicode_ci and utf8_unicode_ci
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• Support error/info log desensitization
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• Support Invisible Indexes
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• Support Async commit. Async Commit is an optimization that reduces commit latency, by returning success to the user when all prewrites have succeeded. (Experimental)
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• Support clustered Index. Clustered indexes provide TiDB the ability to organize tables in a way that can improve the performance of certain queries. (Experimental)
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• Support LIST PARTITION and LIST COLUMNS PARTITION table (Experimental)
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• Improve the Accuracy and Robustness of Index Selection (Experimental)
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Improvements

• Improve the executor runtime information collection
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• Optimize the Performance of Bulk Deletion
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