presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/NativeCassandraSession.java/NativeCassandraSession/isMaterializedView
class NativeCassandraSession:    @Override
    public boolean isMaterializedView(SchemaTableName schemaTableName)
    {
        KeyspaceMetadata keyspace = getKeyspaceByCaseInsensitiveName(schemaTableName.getSchemaName());
        return keyspace.getMaterializedView(schemaTableName.getTableName()) != null;
    }