Upgrading to MariaDB Connector/J 5.1.x
In Connector/J 5.0.x and earlier, the alias for a table in a SELECT statement is returned when accessing the result set metadata using ResultSetMetaData.getColumnName(). This behavior however is not JDBC compliant, and in Connector/J 5.1 this behavior was changed so that the original table name, rather than the alias, is returned.
The JDBC-compliant behavior is designed to let API users reconstruct the DML statement based on the metadata within ResultSet and ResultSetMetaData.
You can get the alias for a column in a result set by calling ResultSetMetaData.getColumnLabel(). To use the old noncompliant behavior with ResultSetMetaData.getColumnName(), use the useOldAliasMetadataBehavior option and set the value to true.
In Connector/J 5.0.x the default value of useOldAliasMetadataBehavior was true, but in Connector/J 5.1 this was changed to a default value of false.