@Override
    public ResultSet getColumnPrivileges(String catalog, String schema, String table, String columnNamePattern) throws SQLException {
        //Return an empty result set with the required columns
        log.warn("getColumnPrivileges is not supported and may return invalid results");
        try {
            return connection.createStatement().executeQuery("SELECT NULL AS TABLE_CAT, NULL AS TABLE_SCHEM, NULL AS TABLE_NAME, NULL AS COLUMN_NAME, NULL AS GRANTOR, NULL AS GRANTEE, NULL AS PRIVILEGE, NULL AS IS_GRANTABLE");
        } catch (Exception e) {
            throw ExceptionUtils.toSqlState(e);
        }
    }
Returns name of the ClickHouse table types as the broad category (rather than engine name).
@return - ResultSet with one column TABLE_TYPE
@throws SQLException - if an error occurs
jdbc-v2/src/main/java/com/clickhouse/jdbc/metadata/DatabaseMetaDataImpl.java