getColumnClassName needs to be implemented

[livk-cloud]

Describe your feedback

com.clickhouse.jdbc.metadata.ResultSetMetaData#getColumnClassName needs to be implemented like com.clickhouse.jdbc.ClickHouseResultSetMetaData, otherwise Spring Jdbc and Mybatis will not work

public class ResultSetMetaData implements java.sql.ResultSetMetaData, JdbcV2Wrapper {

       public String getColumnClassName(int column) throws SQLException {
        throw new SQLException("Not implemented", "0A000");
    }
}

public class ClickHouseResultSetMetaData extends JdbcWrapper implements ResultSetMetaData {
    public String getColumnClassName(int column) throws SQLException {
        return this.mapper.toJavaClass(this.getColumn(column), this.typeMap).getCanonicalName();
    }
}

[livk-cloud]

#2113

[chernser]

Good day, @livk-cloud !
We appreciate your contribution!

[chernser]

@livk-cloud is there any document that points out how JDBC driver should behave and what should be returned?
I mean any guidelines from Spring or Mybatis how they "see" type mapping? I think, it is critical now to understand to make a review of your PR.
Thanks!