presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/ViewResult.java/Mapper/map
class Mapper:        @Override
        public ViewResult map(int index, ResultSet r, StatementContext ctx)
                throws SQLException
        {
            SchemaTableName name = new SchemaTableName(
                    r.getString("schema_name"),
                    r.getString("table_name"));
            return new ViewResult(name, r.getString("data"));
        }