How to suppress auto statement flushing in MyBatis

Background

I want to implement the following procedure with Spring and MyBatis:

1. Read a line from a CSV file
2. Query a table (table ACCOUNT) with values read from the CSV file.
3. Merge the values from the CSV file and table ACCOUNT into a record
4. Insert the merged record into another table (REGISTRATION)

I want to use the batch executor (<setting name="defaultExecutorType" value="BATCH"/>) because this procedure inserts large number of records.

Problem

I have implemented the procedure like this:

AccountDao accountDao = applicationContext.getBean("accountDao", AccountDao.class);
RegistrationDao registrationDao = applicationContext.getBean("registrationDao", RegistrationDao.class);

List<Registration> list = null;
try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(path), "UTF-8"))) {

    CsvToBeanBuilder<Registration> builder = new CsvToBeanBuilder<Registration>(reader);
    builder.withType(Registration.class);

    list = builder.build().parse();
    for (Registration reg : list) {
        Account account = accountDao.findAccount(reg.getAccountId());
        reg.setName(account.getName());
            ...
        registrationDao.insertRegistration(reg);
    }
}

I have expected the INSERT SQL to be queued with JDBC Statement#addBatch(), and executed in a batch at the end of the transaction.

But in actually, MyBatis automatically flush every statement with BatchExecutor#doFlushStatements() when I query ACCOUNT table with AccountDao#findAccount(), so all INSERT SQL are executed separately.

In this situation, ACCOUNT has no relation to REGISTRATION, so you can safely queue the update statements and execute them in a batch.

Question

Is there any way to suppress automated flushing of queued statements when the developer knows the queried tables have no relation to the updated tables?