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TDSQL-C for MySQL
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    Kernel Minor Version Release Notes

    Last updated: 2023-02-07 11:53:30
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      This document describes the release notes of the TDSQL-C for MySQL database proxy.

      Viewing database proxy version

      On the cluster list page, proceed according to the actually used view mode:
      Tab view
      List view
      Option 1 On the cluster management page, click Database Proxy and view it in Overview > Basic Info > Proxy Version.
      
      Option 2 On the Cluster Details tab on the cluster management page, click Details after Database Proxy in the architecture to enter the Database Proxy page, and view it in Overview > Basic Info > Proxy Version.
      
      You can view the version in Overview > Proxy Version on the Database Proxy tab.
      

      Version description

      Note:
      If the TDSQL-C for MySQL kernel version requirements are not met, you can upgrade the kernel version of your database first as instructed in Upgrading Kernel Minor Version.
      Version
      TDSQL-C for MySQL Kernel Version Requirement
      Description
      1.3.3
      TDSQL-C for MySQL 5.7 ≥ 2.0.20/2.1.6TDSQL-C for MySQL 8.0 ≥ 3.1.6
      Fixes
      Fixed the issue where an error was reported when the session connection pool reused connections to send `change_user` to the backend, and the issue where the PREPARE statement was not correctly handled by the database proxy after a new connection was established.
      Fixed the issue where the EXECUTE statement didn't have a parameter type.
      1.2.1
      -
      Feature updates
      Supported MySQL 5.7/8.0.
      Supported cluster deployment to deploy multiple instances under one database proxy.
      Supported read/write separation and corresponding weight configuration.
      Supported the failover feature to send read requests to the read-write instance in case of read-only instance failures.
      Supported the load balancing feature to balance the connections to each proxy node.
      Supported using the HINT syntax to specify router nodes.
      Supported the session-level connection pool for scenarios where non-persistent connections were frequently established to the database.
      Allowed the database proxy to save connections and reuse them subsequently.
      Supported hot loading to modify configurations online without restarting the dedicated database proxy.
      Supported the reconnection feature for read-only instances. In persistent connection scenarios, when a read-only instance was restarted or added, the database proxy would automatically establish a connection and restore routing to it.
      
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