tuohai666 commented on issue #2226: select * missing column URL: https://github.com/apache/incubator-shardingsphere/issues/2226#issuecomment-487898720 Root cause of this problem: After ALTER clause of MySQL, sharding-proxy should refresh the metadata by JDBC for metadata changed by DDL clause. JDBC have to send SQLs to database to get the new metadata. But why metadata wasn't refreshed? I found cacheResultSetMetadata property of JDBC is setting by TRUE which make JDBC cache metadata but not access database to get a new one. Set cacheResultSetMetadata = FALSE will fix this problem.
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