Q: DDL/DML & rollback

Does Oracle implicitly commits if there are mixed DML and DDL statements in the current transaction?

Scenario:

---

ora_csr csr, anotherCsr;

open(&csr);
parse(&csr, "INSERT INTO a VALUES (:anInt, :aChar)");

do (5) {

   // Set anInt and aChar
   exec(&csr);
}

open(&anotherCsr);
parse(&anotherCsr, "CREATE TABLE b (key NUMBER, name VARCHAR2(20)); exec(&anotherCsr);

rollback();
---
 

Even if I end the Oracle stuff with a rollback() there will be 5 rows in the 'a' table. The 'b' table will exist as supposed (though DDL statements can't be rollback'ed).

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