zjcnb commented on issue #16180:
URL: 
https://github.com/apache/shardingsphere/issues/16180#issuecomment-1073430783


   > Hi @zhouyouwei-0127 @zjcnb If you add a new table directly on the 
underlying database, or modify the table structure, it will not trigger the 
metadata refresh in Proxy. This is by design and should not be considered a 
bug. It is recommended to execute DDL statements through Proxy.
   > 
   > In addition, there is some syntax in DistSQL RAL, which can help users to 
actively trigger metadata refresh in this case:
   > 
   > * `refresh table metadata`
   > * `show table metadata tableName`
   > 
   > 
https://shardingsphere.apache.org/document/current/cn/user-manual/shardingsphere-proxy/distsql/syntax/ral/
   
   @RaigorJiang  Thank you for your answer, i see.


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