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Posted to notifications@shardingsphere.apache.org by GitBox <gi...@apache.org> on 2020/05/18 10:45:08 UTC

[GitHub] [shardingsphere] zscxst opened a new issue #5674: MySQL Connector/J 8.X Above return Unknown system variable 'query_cache_size'

zscxst opened a new issue #5674:
URL: https://github.com/apache/shardingsphere/issues/5674


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   If no response **more than 7 days** and we cannot reproduce it on current information, we will **close it**.
   
   Please answer these questions before submitting your issue. Thanks!
   
   ### Which version of ShardingSphere did you use?
   4.1.0
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   ShardingSphere-Proxy
   
   ### Expected behavior
   MySQL Server is 8.0.20
   MySQL Connector/J 8.X Above version connection success
   
   ### Actual behavior
   java.sql.SQLException: Unknown system variable 'query_cache_size'
   
   ### Reason analyze (If you can)
   [https://github.com/apache/shardingsphere/blob/master/shardingsphere-db-protocol/shardingsphere-db-protocol-mysql/src/main/java/org/apache/shardingsphere/db/protocol/mysql/constant/MySQLServerInfo.java](url) file constant SERVER_VERSION.This constant is returned by the handshake protocol. In java client jar file com.mysql.cj.NativeSession will determine the version number of the server.Code is:
   if (!versionMeetsMinimum(8, 0, 3)) {
        queryBuf.append(", @@query_cache_size AS query_cache_size");
         queryBuf.append(", @@query_cache_type AS query_cache_type");
   }
   But mysql server 8 abandon ‘query_cache_size’
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
   Mysql server 8.0.20
   
   Java client maven import
   ```xml
   <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>8.0.20</version>
   </dependency>
   ```
   
   ### Example codes for reproduce this issue (such as a github link).
   


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[GitHub] [shardingsphere] cherrylzhao closed issue #5674: MySQL Connector/J 8.X Above return Unknown system variable 'query_cache_size'

Posted by GitBox <gi...@apache.org>.
cherrylzhao closed issue #5674:
URL: https://github.com/apache/shardingsphere/issues/5674


   


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[GitHub] [shardingsphere] little-liang commented on issue #5674: MySQL Connector/J 8.X Above return Unknown system variable 'query_cache_size'

Posted by GitBox <gi...@apache.org>.
little-liang commented on issue #5674:
URL: https://github.com/apache/shardingsphere/issues/5674#issuecomment-630172484


   ask common


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[GitHub] [shardingsphere] zscxst commented on issue #5674: MySQL Connector/J 8.X Above return Unknown system variable 'query_cache_size'

Posted by GitBox <gi...@apache.org>.
zscxst commented on issue #5674:
URL: https://github.com/apache/shardingsphere/issues/5674#issuecomment-630531699


   > duplicate with #3097
   
   There can be a default version number, but I suggest that you can configure the version number. 


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[GitHub] [shardingsphere] cherrylzhao commented on issue #5674: MySQL Connector/J 8.X Above return Unknown system variable 'query_cache_size'

Posted by GitBox <gi...@apache.org>.
cherrylzhao commented on issue #5674:
URL: https://github.com/apache/shardingsphere/issues/5674#issuecomment-632704938


   fix at #5720 


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[GitHub] [shardingsphere] cherrylzhao commented on issue #5674: MySQL Connector/J 8.X Above return Unknown system variable 'query_cache_size'

Posted by GitBox <gi...@apache.org>.
cherrylzhao commented on issue #5674:
URL: https://github.com/apache/shardingsphere/issues/5674#issuecomment-630126704


   duplicate with #3097 


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