dongzl edited a comment on issue #3311: tinyint(1) column type will result in a booleam value in the query data URL: https://github.com/apache/incubator-shardingsphere/issues/3311#issuecomment-543475191 Hi @Myshiner , this is my debug pic, tinyint(1) covert to boolean value is MySQL's JDBC implemention, I think this is not a problem. `com.mysql.jdbc.ResultSetImpl` 
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