presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/util/CassandraCqlUtils.java/CassandraCqlUtils/validColumnName
class CassandraCqlUtils:    public static String validColumnName(String identifier)
    {
        if (identifier.isEmpty() || identifier.equals(EMPTY_COLUMN_NAME)) {
            return "\"\"";
        }

        return validIdentifier(identifier);
    }