presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/ColumnMetadataRow.java/ColumnMetadataRow/map
class ColumnMetadataRow:        @Override
        public ColumnMetadataRow map(int index, ResultSet rs, StatementContext context)
                throws SQLException
        {
            return new ColumnMetadataRow(
                    rs.getLong("table_id"),
                    rs.getLong("column_id"),
                    rs.getString("column_name"),
                    getOptionalInt(rs, "sort_ordinal_position"),
                    getOptionalInt(rs, "bucket_ordinal_position"));
        }